Distance Sampling References
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| Author | Year | Title | Journal/Proceedings | DOI/URL/PDF | |
|---|---|---|---|---|---|
| Aars, J., Andersen, M., Belikov, S., Boltunov, A., Buckland, S. T., Marques, T. A. & Wiig, Ø. | 2005 | Line transect estimate of the subpopulation size of polar bears in the Barents Sea [BibTeX] |
Polar Bears :173-175 | ||
BibTeX:
@inproceedings{Aars2005,
author = {Aars, J. and Andersen, M. and Belikov, S. and Boltunov, A. and Buckland, S. T. and Marques, T. A. and Wiig, {\O}.},
title = {Line transect estimate of the subpopulation size of polar bears in the Barents Sea},
booktitle = {Polar Bears},
year = {2005},
number = {Proceedings of the 14th Working Meeting of the IUCN/SSC Polar Bear Specialist Group},
pages = {173-175}
}
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| Aars, J., Marques, T. A., Buckland, S. T., Andersen, M., Belikov, S., Boltunov, A. & Wiig, Ø. | 2009 | Estimating the Barents Sea polar bear subpopulation size [BibTeX] |
Marine Mammal Science 25:35--52 | ||
BibTeX:
@article{Aars2008,
author = {J. Aars and T. A. Marques and S. T. Buckland and M. Andersen and S. Belikov and A. Boltunov and {\O}. Wiig},
title = {Estimating the Barents Sea polar bear subpopulation size},
journal = {Marine Mammal Science},
year = {2009},
volume = {25},
pages = {35--52}
}
|
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| Acevedo, P., Ruiz-Fons, F., Vicente, J., Reyes-García, A. R., Alzaga, V. & Gortázar, C. | 2009 | Estimating red deer abundance in a wide range of management situations in Mediterranean habitats [BibTeX] |
Journal Of Zoology 276:37--47 | ||
BibTeX:
@article{Acevedo2009,
author = {Acevedo, P and Ruiz-Fons, F and Vicente, J and Reyes-García, A. R. and Alzaga, V and Gortázar, C},
title = {Estimating red deer abundance in a wide range of management situations in Mediterranean habitats},
journal = {Journal Of Zoology},
year = {2009},
volume = {276},
pages = {37--47}
}
|
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| Akin, J. A. | 1998 | Fourier series estimation of ground skink population density [BibTeX] |
Copeia :519--522 | ||
BibTeX:
@article{Aki98,
author = {Akin, J. A.},
title = {Fourier series estimation of ground skink population density},
journal = {Copeia},
year = {1998},
pages = {519--522}
}
|
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| Aldrin, M., Holden, M. & Schweder, T. | 2003 | Comment on Cowling's `spatial methods for line transect surveys' [BibTeX] |
Biometrics 59:186--88 | ||
BibTeX:
@article{Aldetal03,
author = {Aldrin, M. and Holden, M. and Schweder, T.},
title = {Comment on {C}owling's `spatial methods for line transect surveys'},
journal = {Biometrics},
year = {2003},
volume = {59},
pages = {186--88}
}
|
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| Alldredge, J. R. & Gates, C. E. | 1985 | Line transect estimators for left-truncated distributions [BibTeX] |
Biometrics 41:273--280 | ||
BibTeX:
@article{AllGat85,
author = {Alldredge, J. R. and Gates, C. E.},
title = {Line transect estimators for left-truncated distributions},
journal = {Biometrics},
year = {1985},
volume = {41},
pages = {273--280}
}
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| Alldredge, M. W., Pacifici, K., Simons, T. R. & Pollock, K. H. | 2008 | A novel field evaluation of the effectiveness of distance and independent observer sampling to estimate aural avian detection probabilities [BibTeX] |
Journal of Applied Ecology 45:1349--1356 | ||
BibTeX:
@article{Alldredge2008,
author = {Alldredge, M. W. and Krishna Pacifici and T. R. Simons and K. H. Pollock},
title = {A novel field evaluation of the effectiveness of distance and independent observer sampling to estimate aural avian detection probabilities},
journal = {Journal of Applied Ecology},
year = {2008},
volume = {45},
pages = {1349--1356}
}
|
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| Alldredge, M. W., Pollock, K. H., Simons, T. & Shriner, S. A. | 2007 | Multiple-species analysis of point count data: a more parsimonious modeling framework [BibTeX] |
Journal of Applied Ecology 44:281--290 | ||
BibTeX:
@article{Alletal2007a,
author = {Alldredge, M. W. and K. H. Pollock and T.R. Simons and S. A. Shriner},
title = {Multiple-species analysis of point count data: a more parsimonious modeling framework},
journal = {Journal of Applied Ecology},
year = {2007},
volume = {44},
pages = {281--290}
}
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| Alldredge, M. W., Simons, T. R. & Pollock, K. H. | 2007 | A field evaluation of distance measurement error in auditory avian point count surveys | Journal of Wildlife Management 71:2759--2766 | URL PDF | |
| Abstract: Detection distance is an important and common auxiliary variable measured during avian point count surveys. Distance data are used to determine the area sampled and to model the detection process using distance sampling theory. In densely forested habitats, visual detections of birds are rare, and most estimates of detection distance are based on auditory cues. Distance sampling theory assumes detection distances are measured accurately, but empirical validation of this assumption for auditory detections is lacking. We used a song playback system to simulate avian point counts with known distances in a forested habitat to determine the error structure of distance estimates based on auditory detections. We conducted field evaluations with 6 experienced observers both before and after distance estimation training. We conducted additional studies to determine the effect of height and speaker orientation (toward or away from observers) on distance estimation error. Distance estimation errors for all evaluations were substantial, although training reduced errors and bias in distance estimates by approximately 15%. Measurement errors showed a nonlinear relationship to distance. Our results suggest observers were not able to differentiate distances beyond 65 m. The height from which we played songs had no effect on distance estimation errors in this habitat. The orientation of the song source did have a large effect on distance estimation errors; observers generally doubled their distance estimates for songs played away from them compared with distance estimates for songs played directly toward them. These findings, which we based on realistic field conditions, suggest measures of uncertainty in distance estimates to auditory detections are substantially higher than assumed by most researchers. This means aural point count estimates of avian abundance based on distance methods deserve careful scrutiny because they are likely biased. | |||||
| Review: Distance estimation errors for all experiments were substantial, although, training did reduce errors and bias in distance estimates. | |||||
BibTeX:
@article{Alldredge2007,
author = {Alldredge, M. W. and T. R. Simons, and K. H. Pollock},
title = {A field evaluation of distance measurement error in auditory avian point count surveys},
journal = {Journal of Wildlife Management},
year = {2007},
volume = {71},
pages = {2759--2766},
note = {preprint Alldredgeetal0000.pdf},
url = {http://www.wildlifejournals.org/perlserv/?request=get-toc&issn=0022-541X&volume=71&issue=8}
}
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| Alldredge, M. W., Simons, T. R. & Pollock, K. H. | 2007 | Factors affecting aural detections of songbirds [BibTeX] |
Ecological Applications 17:948--955 | ||
BibTeX:
@article{Alletal0000b,
author = {Alldredge, M. W. and T. R. Simons, and K. H. Pollock},
title = {Factors affecting aural detections of songbirds},
journal = {Ecological Applications},
year = {2007},
volume = {17},
pages = {948--955}
}
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| Alpizar-Jara, R. | 1997 | Assessing assumption violation in line transect sampling [BibTeX] |
: | ||
BibTeX:
@phdthesis{ALP97,
author = {Alpizar-Jara,R.},
title = {Assessing assumption violation in line transect sampling},
school = {North Carolina State University},
year = {1997}
}
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| Alpizar-Jara, R. & Pollock, K. H. | 1999 | Combining line transect and capture-recapture for mark-resighting studies [BibTeX] |
Marine Mammal Survey and Assessment Methods :99--114 | ||
BibTeX:
@incollection{AJPol99,
author = {Alpizar-Jara, R. and Pollock, K. H.},
title = {Combining line transect and capture-recapture for mark-resighting studies},
booktitle = {Marine Mammal Survey and Assessment Methods},
publisher = {Balkema},
year = {1999},
pages = {99--114}
}
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| Alpizar-Jara, R. & Pollock, K. H. | 1996 | A combination line transect and capture recapture sampling model for multiple observers in aerial surveys [BibTeX] |
Environmental and Ecological Statistics 3:311--27 | ||
BibTeX:
@article{AJPol96,
author = {Alpizar-Jara, R. and Pollock, K. H.},
title = {A combination line transect and capture recapture sampling model for multiple observers in aerial surveys},
journal = {Environmental and Ecological Statistics},
year = {1996},
volume = {3},
pages = {311--27}
}
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| Alpizar-Jara, R., Pollock, K. H. & Haines, D. E. | 2005 | Mark-recapture estimators for dual frame population size of prominent nesting structures: the effect of uncertain detection probability [BibTeX] |
Environmental and Ecological Statistics 12:155-168 | DOI | |
BibTeX:
@article{Alpizar-Jara2005,
author = {Alpizar-Jara, Russell and Pollock, Kenneth H. and Haines, Dawn E.},
title = {Mark-recapture estimators for dual frame population size of prominent nesting structures: the effect of uncertain detection probability},
journal = {Environmental and Ecological Statistics},
year = {2005},
volume = {12},
pages = {155-168},
doi = {10.1007/s10651-005-1039-0}
}
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| Anadon, J., Gimenez, A. & Ballestar, R. | 2010 | Linking local ecological knowledge and habitat modelling to predict absolute species abundance on large scales [BibTeX] |
Biodiversity and Conservation 19:1443-1454 | DOI URL | |
BibTeX:
@article{springerlink:10.1007/s10531-009-9774-4,
author = {Anadon, Jose and Gimenez, Andres and Ballestar, Ruben},
title = {Linking local ecological knowledge and habitat modelling to predict absolute species abundance on large scales},
journal = {Biodiversity and Conservation},
year = {2010},
volume = {19},
pages = {1443-1454},
url = {http://dx.doi.org/10.1007/s10531-009-9774-4},
doi = {10.1007/s10531-009-9774-4}
}
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| Ancrenaz, M., Gimenez, O., Ambu, L., Ancrenaz, K., Andau, P., Goossens, B., Payne, J., Sawang, A., Tuuga, A. & Lackman-Ancrenaz, I. | 2005 | Aerial surveys give new estimates for orangutans in Sabah, Malaysia [BibTeX] |
PLoS Biol 3:1-8 | ||
BibTeX:
@article{Ancrenaz2005,
author = {Ancrenaz, M and Gimenez, O and Ambu, L and Ancrenaz, K and Andau, P and Goossens, B and Payne, J and Sawang, A and Tuuga, A and Lackman-Ancrenaz, I},
title = {Aerial surveys give new estimates for orangutans in {Sabah, Malaysia}},
journal = {PLoS Biol},
year = {2005},
volume = {3},
number = {1},
pages = {1-8}
}
|
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| Ancrenaz, M., Goossens, B., Gimenez, O., Sawang, A. & Lackman-Ancrenaz, I. | 2004 | Determination of ape distribution and population size using ground and aerial surveys: a case study with orang-utans in lower Kinabatangan, Sabah, Malaysia [BibTeX] |
Animal Conservation 7:375-385 | ||
| Review: example of design to deal with potential density gradient | |||||
BibTeX:
@article{Ancrenaz2004,
author = {Marc Ancrenaz and Benoit Goossens and Olivier Gimenez and Azri Sawang and Isabelle Lackman-Ancrenaz},
title = {Determination of ape distribution and population size using ground and aerial surveys: a case study with orang-utans in lower {K}inabatangan, {S}abah, {M}alaysia},
journal = {Animal Conservation},
year = {2004},
volume = {7},
pages = {375-385}
}
|
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| Andersen, D. E., Rongstad, O. J. & Mytton, W. R. | 1985 | Line transect analysis of raptor abundance along roads [BibTeX] |
Wildlife Society Bulletin 13:533--539 | ||
BibTeX:
@article{Andetal85,
author = {Andersen, D. E. and Rongstad, O. J. and Mytton, W. R.},
title = {Line transect analysis of raptor abundance along roads},
journal = {Wildlife Society Bulletin},
year = {1985},
volume = {13},
pages = {533--539}
}
|
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| Anderson, B. W. & Ohmart, R. D. | 1981 | Comparisons of avian census results using variable distance transect and variable circular plot techniques [BibTeX] |
Estimating Numbers of Terrestrial Birds :186--192 | ||
BibTeX:
@incollection{AndOhm81,
author = {Anderson, B. W. and Ohmart, R. D.},
title = {Comparisons of avian census results using variable distance transect and variable circular plot techniques},
booktitle = {Estimating Numbers of Terrestrial Birds},
publisher = {Cooper Ornithological Society},
year = {1981},
number = {6},
pages = {186--192}
}
|
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| Anderson, D. R. | 2003 | Response to Engeman: index values rarely constitute reliable information [BibTeX] |
Wildlife Society Bulletin 31:288-291 | URL | |
BibTeX:
@article{And03,
author = {Anderson, D R},
title = {Response to {E}ngeman: index values rarely constitute reliable information},
journal = {Wildlife Society Bulletin},
year = {2003},
volume = {31},
pages = {288-291},
url = {http://welcome.warnercnr.colostate.edu/~anderson/PDF_files/response.pdf}
}
|
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| Anderson, D. R. | 2001 | The need to get the basics right in wildlife field studies [BibTeX] |
Wildlife Society Bulletin 29:1294--1297 | URL | |
BibTeX:
@article{AND2001,
author = {Anderson, D. R.},
title = {The need to get the basics right in wildlife field studies},
journal = {Wildlife Society Bulletin},
year = {2001},
volume = {29},
pages = {1294--1297},
url = {http://welcome.warnercnr.colostate.edu/~anderson/PDF_files/Opinion.pdf}
}
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| Anderson, D. R., Burnham, K. P. & Crain, B. R. | 1985 | Estimating population size and density using line transect sampling [BibTeX] |
Biometrical Journal 27:723--731 | ||
BibTeX:
@article{Andetal85a,
author = {Anderson, D. R. and Burnham, K. P. and Crain, B. R.},
title = {Estimating population size and density using line transect sampling},
journal = {Biometrical Journal},
year = {1985},
volume = {27},
pages = {723--731}
}
|
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| Anderson, D. R., Burnham, K. P. & Crain, B. R. | 1985 | Some mathematical models for line transect sampling [BibTeX] |
Biometrical Journal 27:741--752 | ||
BibTeX:
@article{Andetal85b,
author = {Anderson, D. R. and Burnham, K. P. and Crain, B. R.},
title = {Some mathematical models for line transect sampling},
journal = {Biometrical Journal},
year = {1985},
volume = {27},
pages = {741--752}
}
|
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| Anderson, D. R., Burnham, K. P. & Crain, B. R. | 1980 | Some comments on Anderson and Pospahala's correction of bias in line transect sampling [BibTeX] |
Biometrical Journal 22:513--524 | ||
BibTeX:
@article{Andetal80,
author = {Anderson, D. R. and Burnham, K. P. and Crain, B. R.},
title = {Some comments on {A}nderson and {P}ospahala's correction of bias in line transect sampling},
journal = {Biometrical Journal},
year = {1980},
volume = {22},
pages = {513--524}
}
|
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| Anderson, D. R., Burnham, K. P. & Crain, B. R. | 1979 | Line transect estimation of population size: the exponential case with grouped data [BibTeX] |
Communications in Statistics --- Theory and Methods A8:487--507 | ||
BibTeX:
@article{Andetal79a,
author = {Anderson, D. R. and Burnham, K. P. and Crain, B. R.},
title = {Line transect estimation of population size: the exponential case with grouped data},
journal = {Communications in Statistics --- Theory and Methods},
year = {1979},
volume = {A8},
pages = {487--507}
}
|
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| Anderson, D. R., Burnham, K. P. & Crain, B. R. | 1978 | A log-linear model approach to estimation of population size using the line-transect sampling method [BibTeX] |
Ecology 59:190--193 | ||
BibTeX:
@article{Andetal78,
author = {Anderson, D. R. and Burnham, K. P. and Crain, B. R.},
title = {A log-linear model approach to estimation of population size using the line-transect sampling method},
journal = {Ecology},
year = {1978},
volume = {59},
pages = {190--193}
}
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| Anderson, D. R., Burnham, K. P., Lubow, B. C., Thomas, L., Corn, P. S., Medica, P. A. & Marlow, R. W. | 2001 | Field trials of line transect methods applied to estimation of desert tortoise abundance [BibTeX] |
Journal of Wildlife Management 65:583--597 | ||
BibTeX:
@article{AND01,
author = {Anderson, D. R. and Burnham, K. P. and Lubow, B. C. and Thomas, L. and Corn, P. S. and Medica,P. A. and Marlow, R. W.},
title = {Field trials of line transect methods applied to estimation of desert tortoise abundance},
journal = {Journal of Wildlife Management},
year = {2001},
volume = {65},
pages = {583--597}
}
|
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| Anderson, D. R., Burnham, K. P., White, G. C. & Otis, D. L. | 1983 | Density estimation of small-mammal populations using a trapping web and distance sampling methods. | Ecology 64:674--680 | ||
| Abstract: Distance sampling methodology is adapted to enable animal density (number per unit of area) to be estimated from capture-recapture and removal data. A trapping web design provides the link between capture data and distance sampling theory. Several alternative sampling and analysis methods are possible within the general framework of distance sampling theory; a few alternatives are discussed and an example is given. | |||||
BibTeX:
@article{Anderson1983,
author = {Anderson, D. R. and Burnham, K. P. and White, G. C. and Otis, D. L.},
title = {Density estimation of small-mammal populations using a trapping web and distance sampling methods.},
journal = {Ecology},
year = {1983},
volume = {64},
number = {4},
pages = {674--680}
}
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| Anderson, D. R., Laake, J. L., Crain, B. R. & Burnham, K. P. | 1979 | Guidelines for line transect sampling of biological populations [BibTeX] |
Journal of Wildlife Management 43:70--78 | ||
BibTeX:
@article{Andetal79b,
author = {Anderson, D. R. and Laake, J. L. and Crain, B. R. and Burnham, K. P.},
title = {Guidelines for line transect sampling of biological populations},
journal = {Journal of Wildlife Management},
year = {1979},
volume = {43},
pages = {70--78}
}
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| Anderson, D. R. & Pospahala, R. S. | 1970 | Correction of bias in belt transect studies of immotile objects [BibTeX] |
Journal of Wildlife Management 34:141--146 | ||
| Review: Este artigo é muito giro. Todo ele é na framework de strip transect, mas curiosamente isto acaba por ser mais distance samplinhg que outra coisa. Mesmo sem o saberem, estão a modelar a função de detecção. É interessante porque referem desde logo que a metodologia so funciona se todos os animais sobre a linha forem vsitos, um percursor de g(0) = 1. Dão exemplos de heaping, e referem que em Gates et al. (1968) também havia. |
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BibTeX:
@article{AndPos70,
author = {Anderson, D. R. and Pospahala, R. S.},
title = {Correction of bias in belt transect studies of immotile objects},
journal = {Journal of Wildlife Management},
year = {1970},
volume = {34},
pages = {141--146}
}
|
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| Anderson, D. R. & Southwell, C. | 1995 | Estimates of macropod density from line transect surveys relative to analyst expertise [BibTeX] |
Journal of Wildlife Management 59:852--857 | ||
BibTeX:
@article{AndSou95,
author = {Anderson, D. R. and Southwell, C.},
title = {Estimates of macropod density from line transect surveys relative to analyst expertise},
journal = {Journal of Wildlife Management},
year = {1995},
volume = {59},
pages = {852--857}
}
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| Andriolo, A., Martins, C., Engel, M., Pizzorno, J., Mas-Rosa, S., Freitas, A., Morete, M. & Kinas, P. | 2006 | The first aerial survey to estimate abundance of humpback whales (Megaptera novaeangliae) in the breeding ground off Brazil (Breeding Stock A) | Journal of Cetacean Research and Management 8:307-311 | ||
| Abstract: In the Southern Hemisphere, humpback whales (Megaptera novaeangliae) were heavily exploited from both coastal stations and in pelagic waters in all major ocean basins. About 200,000 whales were taken after 1900, causing declines of populations to small percentages of their pre-exploitation levels. The study presented here aimed to investigate humpback whale abundance in the Brazilian coastal breeding ground, in order to provide information to support further analysis of the population recovery. Between 25 August and 2 September 2001, a fixed wing, flat window, aircraft was used to survey transect lines along the northern limit of Bahia State (12°10’S), to the southern limit of Espírito Santo State (20°42’S). All on-effort sightings were recorded and abundance was estimated according to standard distance sampling methodology (Burnham et al., 1980; Buckland et al., 1993). Group sizes of humpback whales ranged between 1-5 and the mean group size was 1.52 (±0.06). The model that best fitted the perpendicular distance data, based on the minimum Akaike Information Criterion, was the hazard rate model. The population size estimated using uncorrected data was 1,493 (CV=0.21) whales. Surface time was used to correct the estimates for gˆ (0), resulting in a correction factor of 0.67 (±0.15). The corrected analysis for each block and combined result, increased the population size estimate to 2,229 (CV=0.31) individuals. The data from this study could be used to identify new areas appropriate for whalewatching, to monitor the status and dynamics of the humpback whale population off the Brazilian coast and to provide information for the establishment of new protected areas | |||||
BibTeX:
@article{Andriolo2006,
author = {Andriolo, A. and Martins, C.C.A. and Engel, M.H. and Pizzorno, J.L. and Mas-Rosa, S. and Freitas, A.C. and Morete, M.E. and Kinas, P.G.},
title = {The first aerial survey to estimate abundance of humpback whales (\textit{Megaptera novaeangliae}) in the breeding ground off {Brazil (Breeding Stock A)}},
journal = {Journal of Cetacean Research and Management},
year = {2006},
volume = {8},
pages = {307-311}
}
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| Andriolo, A., Piovezan, U., Costa, M., Laake, J. & Duarte, J. | 2005 | Aerial line transect survey to estimate abundance of marsh deer (Blastocerus dichotomus) (Illiger, 1815) [BibTeX] |
Brazilian Archives of Biology and Technology 48:807--814 | ||
BibTeX:
@article{Andriolo2005,
author = {Andriolo, A and Piovezan, U and Costa, MJRP and Laake, J and Duarte, JMB},
title = {Aerial line transect survey to estimate abundance of marsh deer (\textit{Blastocerus dichotomus}) ({I}lliger, 1815)},
journal = {Brazilian Archives of Biology and Technology},
year = {2005},
volume = {48},
pages = {807--814}
}
|
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| Andriolo, A., Piovezan, U., da Costa, M. J. P. & Duarte, J. M. B. | 2001 | Line-transect sampling method used to evaluate the impact of a flooding dam on marsh deer (Blastocerus dichotomus) population in the Paraná River, Brazil. [BibTeX] |
Deer Specialist Group News 16:1--2 | ||
BibTeX:
@article{Andriolo2001,
author = {Artur Andriolo and Ubiratan Piovezan and Mateus J.R. Paranhos da Costa and José Maurício Barbanti Duarte},
title = {Line-transect sampling method used to evaluate the impact of a flooding dam on marsh deer (\textit{Blastocerus dichotomus}) population in the Paraná River, Brazil.},
journal = {Deer Specialist Group News},
year = {2001},
volume = {16},
pages = {1--2}
}
|
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| Anganuzzi, A. A. & Buckland, S. T. | 1989 | Reducing bias in estimated trends from dolphin abundance indices derived from tuna vessel data [BibTeX] |
Report of the International Whaling Commission 39:323--334 | ||
BibTeX:
@article{AngBuc89,
author = {Anganuzzi, A. A. and Buckland, S. T.},
title = {Reducing bias in estimated trends from dolphin abundance indices derived from tuna vessel data},
journal = {Report of the International Whaling Commission},
year = {1989},
volume = {39},
pages = {323--334}
}
|
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| Anganuzzi, A. A., Buckland, S. T. & Cattanach, K. L. | 1991 | Relative abundance of dolphins associated with tuna in the Eastern Tropical Pacific, estimated from tuna vessel sightings data for 1988 and 1989 [BibTeX] |
Report of the International Whaling Commission 41:497--506 | ||
BibTeX:
@article{Angetal91,
author = {Anganuzzi, A. A. and Buckland, S. T. and Cattanach, K. L.},
title = {Relative abundance of dolphins associated with tuna in the {Eastern Tropical P}acific, estimated from tuna vessel sightings data for 1988 and 1989},
journal = {Report of the International Whaling Commission},
year = {1991},
volume = {41},
pages = {497--506}
}
|
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| Anganuzzi, A. A., Catanach, K. L. & Buckland, S. T. | 1992 | Relative abundance of dolphins associated with tuna in the Eastern Tropical Pacific in 1990 and trends since 1975, estimated from tuna vessel sightings data [BibTeX] |
Report of the International Whaling Commission 42:541-547 | ||
BibTeX:
@article{Anganuzzi1992,
author = {Anganuzzi, A. A. and Catanach, K. L. and Buckland, S. T.},
title = {Relative abundance of dolphins associated with tuna in the Eastern Tropical Pacific in 1990 and trends since 1975, estimated from tuna vessel sightings data},
journal = {Report of the International Whaling Commission},
year = {1992},
volume = {42},
pages = {541-547}
}
|
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| Anthony, R. M. & Stehn, R. A. | 1994 | Navigating aerial transects with a laptop computer map [BibTeX] |
Wildlife Society Bulletin 22:674-676 | ||
BibTeX:
@article{AntSte94,
author = {Anthony, R. M. and Stehn, R. A.},
title = {Navigating aerial transects with a laptop computer map},
journal = {Wildlife Society Bulletin},
year = {1994},
volume = {22},
pages = {674-676}
}
|
|||||
| Applegate, R. D., Jr, R. E. K., Moss, E. D., Warr, E. L. & Kennedy, M. L. | 2011 | Problems with Avian Point Counts for Estimating Density of Northern Bobwhite—A Case Study [BibTeX] |
Journal of Fish and Wildlife Management 2:117-121 | ||
BibTeX:
@article{Applegate2011,
author = {Roger D. Applegate and Robert E. Kissell Jr and E. Daniel Moss and Edward L. Warr and Michael L. Kennedy},
title = {Problems with Avian Point Counts for Estimating Density of Northern Bobwhite—A Case Study},
journal = {Journal of Fish and Wildlife Management},
year = {2011},
volume = {2},
pages = {117-121}
}
|
|||||
| Arendt, W. J., Gibbons, D. W. & Gray, G. | 1999 | Status of the volcanically threatened Montserrat Oriole Icterus oberi and other forest birds in Montserrat, West Indies | Bird Conservation International 9:351--372 | ||
| Abstract: The Montserrat Oriole Icterus oberi is endemic to the Caribbean island of Montserrat where, prior to 1995, it was widely distributed across the island's three main interior mountain ranges: the Centre, Soufriere and South Soufriere Hills. In July 1995, a long-dormant volcano on Chances Peak in the Soufriere Hills began to erupt. Since then the forest habitat of the oriole on the Soufriere and South Soufriere Hills has been devastated by pyroclastic flows and surges, heavy ash eruptions and rock falls. The Montserrat Oriole populations that inhabited these two mountain ranges have probably been lost. In December 1997, a census of the remaining Centre Hills population was undertaken to assess its status in the face of the heavy ash fall that occurred earlier the same year. To do this, a systematic grid of 140 sample points was overlaid on an area of 1,437·5 ha encompassing the Centre Hills, and a 10-minute count of all bird species was undertaken at 137 of these points during an eight-day survey period. The distance from the point to each oriole detected was measured and records of all other species were allocated to one of five distance bands radiating out from the point. Distance sampling was used to model densities, and thus to estimate population sizes, of eight bird species in the study area. It was estimated that 4,000 (95% CIs 1,500-7,800) Montserrat Orioles remain in the Centre Hills and thus the world. Although the probability of pyroclastic flows and surges overrunning the Centre Hills is considered remote, it is recommended that the Montserrat Oriole be classified as Globally Threatened (Endangered) under the revised IUCN threat categories because of its loss of breeding habitat since 1995. | |||||
BibTeX:
@article{Arendt1999,
author = {Arendt, W. J. and Gibbons, D. W. and Gray, G.},
title = {Status of the volcanically threatened Montserrat Oriole \textit{Icterus oberi} and other forest birds in Montserrat, West Indies},
journal = {Bird Conservation International},
year = {1999},
volume = {9},
number = {4},
pages = {351--372}
}
|
|||||
| Ashenafi, Z. T., Coulson, T., Sillero-Zubiri, C. & Leader-Williams, N. | 2005 | Behaviour and ecology of the Ethiopian wolf (Canis simensis) in a human-dominated landscape outside protected areas [BibTeX] |
Animal Conservation 8:113--121 | ||
BibTeX:
@article{Ashenafi2005,
author = {Ashenafi, Z. T. and Coulson, T. and Sillero-Zubiri, C. and Leader-Williams, N.},
title = {Behaviour and ecology of the {E}thiopian wolf (\textit{{C}anis simensis}) in a human-dominated landscape outside protected areas},
journal = {Animal Conservation},
year = {2005},
volume = {8},
pages = {113--121}
}
|
|||||
| Atkinson, A. J., Yang, B. S., Fisher, R. N., Ervin, E., Case, T. J., Scott, N. & Shaffer, H. B. | 2003 | MCB Camp Pendleton Arroyo Toad monitoring protocol [BibTeX] |
: | ||
BibTeX:
@book{Atketal03,
author = {Atkinson, A. J. and Yang, B. S. and Fisher, R. N. and Ervin, E. and Case, T. J. and Scott, N. and Shaffer, H. B.},
title = {MCB Camp Pendleton Arroyo Toad monitoring protocol},
publisher = {Western Ecological Research Center, U. S. Geological Survey},
year = {2003}
}
|
|||||
| Averill-Murray, R. & Averill-Murray, A. | 2005 | Regional-scale estimation of density and habitat use of the Desert Tortoise (Gopherus agassizii) in Arizona | Journal of Herpetology 39:65--72 | ||
| Abstract: Desert Tortoise surveys and management in the Sonoran Desert typically exclude intermountain valleys, where tortoises are generally thought to be absent. Furthermore, few regional-level surveys have been conducted because of difficulties in sampling in the complex landscape of Sonoran Desert upland habitat. We used distance-sampling to document macrohabitat use and regional density of Desert Tortoises across the 76,800-ha Ironwood Forest National Monument in Arizona. We observed 42 tortoises on transects, and distance sampling produced an estimate of 17,997 tortoises ? 150 mm carapace length (coefficient of variation = 41.5%) on the monument. Stratification by habitat type (steep topography with boulders, incised washes, or neither of these components) improved precision slightly (37.2%). Detection probability contributed least to density variance, compared to encounter rate and tortoise detectability on the transect line, indicating that assumptions of the technique were met during sampling. We found tortoises or their sign on 92% of transects in boulder habitat, on 71% that included incised washes, and on 25% in habitat with neither of these features (up to 1.7 km away from the nearest slope). Our results indicate that Desert Tortoises in the Sonoran Desert occur at low density, but are not absent, from intermountain valleys, and the maintenance of these valleys for tortoise movement between local populations may be important for long-term population viability. With this in mind, concentrating survey effort in areas with steep topography and boulders will increase tortoise encounter rate, result in better precision of regional density and trend estimates, and may also reduce survey effort. | |||||
BibTeX:
@article{Averill-Murray2005,
author = {Averill-Murray, R.C. and Averill-Murray, A.},
title = {Regional-scale estimation of density and habitat use of the Desert Tortoise (\textit{Gopherus agassizii}) in Arizona},
journal = {Journal of Herpetology},
year = {2005},
volume = {39},
number = {1},
pages = {65--72}
}
|
|||||
| Azhar, B., Zakaria, M., Yusof, E. & Leong, P. C. | 2008 | Efficiency of Fixed-Width Transect and Line-Transect-based Distance Sampling to Survey Red Junglefowl (Gallus gallus spadiceus) in Peninsular Malaysia [BibTeX] |
Journal of Sustainable Development 1:63--73 | ||
BibTeX:
@article{Azhar2008,
author = {Badrul Azhar and Mohamed Zakaria and Ebil Yusof and Puan Chong Leong},
title = {Efficiency of Fixed-Width Transect and Line-Transect-based Distance Sampling to Survey Red Junglefowl (Gallus gallus spadiceus) in Peninsular Malaysia},
journal = {Journal of Sustainable Development},
year = {2008},
volume = {1},
pages = {63--73}
}
|
|||||
| Bächler, E. & Liechti, F. | 2007 | On the importance of g(0) for estimating bird population densities with standard distance-sampling: implications from a telemetry study and a literature review [BibTeX] |
Ibis 149:693--700 | ||
BibTeX:
@article{Baechler2007,
author = {Erich B\"{a}chler and Felix Liechti},
title = {On the importance of g(0) for estimating bird population densities with standard distance-sampling: implications from a telemetry study and a literature review},
journal = {Ibis},
year = {2007},
volume = {149},
pages = {693--700}
}
|
|||||
| Bagchi, S., Goyal, S. & Sankar, K. | 2004 | Herbivore density and biomass in a semi-arid tropical dry deciduous forest of western India [BibTeX] |
Journal of Tropical Ecology 20:475--478 | ||
BibTeX:
@article{Bagchi2004,
author = {Bagchi, S. and Goyal, S.P. and Sankar, K.},
title = {Herbivore density and biomass in a semi-arid tropical dry deciduous forest of western India},
journal = {Journal of Tropical Ecology},
year = {2004},
volume = {20},
number = {4},
pages = {475--478}
}
|
|||||
| Baird, R. W. & Burkhart, S. M. | 2000 | Bias and variability in distance estimation on the water: implications for the management of whale watching [BibTeX] |
: | ||
| Review: É interesssante como se pode ver na figura 1 o efeito de heaping a 50, 100, 150, 200,250 e 300 metros, mas de qualquer forma esse efeito nao e referido. Tem algumas referencias sobre erros em avistamento de baleias - trabalhos do Schweder. Referem tendencia para subestimar distancias as baleias. |
|||||
BibTeX:
@techreport{Baird2000,
author = {Baird, R. W. and Burkhart, S. M.},
title = {Bias and variability in distance estimation on the water: implications for the management of whale watching},
year = {2000},
number = {SC/52/WW1}
}
|
|||||
| Bal, P. | 2010 | Estimating Gopher tortoise abundance through Design-based and Model-based Methods [BibTeX] |
: | ||
BibTeX:
@mastersthesis{Bal2010,
author = {Payal Bal},
title = {Estimating Gopher tortoise abundance through Design-based and Model-based Methods},
school = {Univeristy of St Andrews},
year = {2010}
}
|
|||||
| Baldi, A. & Kisbenedek, T. | 1999 | Species-specific distribution of reed-nesting passerine birds across reed-bed edges: effects of spatial scale and edge type [BibTeX] |
Acta Zoologica Academiae Scientiarum Hungaricae 45:97--114 | ||
BibTeX:
@article{BalKis99,
author = {Baldi, A. and Kisbenedek, T.},
title = {Species-specific distribution of reed-nesting passerine birds across reed-bed edges: effects of spatial scale and edge type},
journal = {Acta Zoologica Academiae Scientiarum Hungaricae},
year = {1999},
volume = {45},
pages = {97--114}
}
|
|||||
| Baldi, R., Albon, S. D. & Elston, D. A. | 2001 | Guanacos and sheep: Evidence for continuing competition in arid Patagonia | Oecologia 129:561--570 | ||
| Abstract: Guanacos (Lama guanicoe) are the only wild ungulate species widely distributed across the Patagonian steppe and have undergone a precipitous population decline since the introduction of domestic sheep (Ovis aries) 100 years ago. There has been speculation that sheep ranching may have played a major role in guanaco population decline after monopolising the most productive land because of competition for forage plants. Our aim in this work was to estimate guanaco abundance and account for its variation across nine different sites, two seasons and two years. We conducted over 100 ground surveys of both guanacos and sheep and estimated the availability of the preferred plant species both animal species might select in their diet. We found that (1) sheep densities were up to 23 times higher than guanaco densities in sympatric conditions, (2) at a protected site without sheep, guanaco density was one order of magnitude higher than at the rest of the sites, (3) across nine different sites, sheep densities alone accounted for around 60% of the variation in guanaco abundance, (4) guanaco densities were negatively related to both total plant cover and availability of the preferred plant species in their diet, which were both positively associated with sheep density, and (5) within-site changes in guanaco densities between seasons and years were negatively related to changes in sheep densities. Our results are consistent with predictions on interspecific competition for food resources, although we cannot rule out possible effects of other human-related activities influencing guanaco abundance. We conclude that sheep compete with guanacos for forage in arid Patagonia. | |||||
BibTeX:
@article{Baldi2001,
author = {Baldi, R. and Albon, S. D. and Elston, D. A.},
title = {Guanacos and sheep: Evidence for continuing competition in arid {P}atagonia},
journal = {Oecologia},
year = {2001},
volume = {129},
pages = {561--570}
}
|
|||||
| Ball, S., Ramsey, D., Nugent, G., Warburton, B. & Efford, M. | 2005 | A method for estimating wildlife detection probabilities in relation to home-range use: Insights from a field study on the common brushtail possum (Trichosurus vulpecula) | Wildlife Research 32:217--227 | ||
| Abstract: Using field data from brushtail possums (Trichosurus vulpecula), we present a method for modelling wildlife detection probabilities. Whereas detection functions typically (e.g. for distance sampling) describe the probability of direct human observations of animal subjects, we adapted this approach for cryptic species where observation depends on animals being caught in traps. Specifically, we characterised the probability of individual brushtail possums being caught by leg-hold traps in an area of farmland and native forest in New Zealand. Detection probability was defined as the per-individual, per-trap, per-night probability of a possum being captured, and was modelled as a function of home-range utilisation. Radio-telemetry was used to define the home-range distributions of 18 possums, and a combination of scanning radio-receivers and movement-activated video-cameras recorded instances when radio-collared possums encountered and stepped on the trigger of leg-hold traps (inactivated by being wired open). We estimated a 5% chance of trapping individual possums with a single leg-hold trap located in the centre of their home range for one night (median value across possums). Furthermore, this probability decreased rapidly as a function of distance, so that at 120 m from the centre of the home range there was less than a 1% chance of trapping success per possum per night. The techniques developed in this study could be applied to a wide variety of species and sampling methods. © CSIRO 2005. | |||||
BibTeX:
@article{Ball2005,
author = {Ball, S.J. and Ramsey, D. and Nugent, G. and Warburton, B. and Efford, M.},
title = {A method for estimating wildlife detection probabilities in relation to home-range use: Insights from a field study on the common brushtail possum \textit{(Trichosurus vulpecula)}},
journal = {Wildlife Research},
year = {2005},
volume = {32},
number = {3},
pages = {217--227}
}
|
|||||
| Ballance, L. T. & Pitman, R. L. | 1998 | Cetaceans of the western tropical Indian Ocean: Distribution, relative abundance, and comparisons with cetacean communities of two other tropical ecosystems [BibTeX] |
Marine Mammal Science 14:429--459 | ||
BibTeX:
@article{BalPit98,
author = {Ballance, L. T. and Pitman, R. L.},
title = {Cetaceans of the western tropical {I}ndian {O}cean: Distribution, relative abundance, and comparisons with cetacean communities of two other tropical ecosystems},
journal = {Marine Mammal Science},
year = {1998},
volume = {14},
pages = {429--459}
}
|
|||||
| Balph, M. H., Stoddart, S. L. & H., B. D. | 1977 | A simple technique for analyzing bird transect counts [BibTeX] |
The Auk 94:606--607 | ||
BibTeX:
@article{Baletal77,
author = {Balph, M. H. and Stoddart, S. L. and Balph D. H.},
title = {A simple technique for analyzing bird transect counts},
journal = {The Auk},
year = {1977},
volume = {94},
pages = {606--607}
}
|
|||||
| Barabesi, L. | 2000 | Local likelihood density estimation in line transect sampling | Environmetrics 11:413--422 | ||
| Abstract: A novel semiparametric estimator for the probability density function of detected distances in line transect sampling is proposed. The estimator is obtained using a local likelihood density estimation approach, a technique recently proposed which affords the advantages of both parametric and nonparametric methods, i.e. accuracy and robustness. Moreover, a procedure for the selection of the local likelihood bandwidth is obtained. The performance of the proposed estimator with respect to some existing nonparametric and semiparametric estimators is assessed by means of a Monte Carlo study. Finally, a real data set is analyzed. Copyright (C) 2000 John Wiley and Sons, Ltd. | |||||
BibTeX:
@article{Barabesi2000,
author = {Barabesi, L.},
title = {Local likelihood density estimation in line transect sampling},
journal = {Environmetrics},
year = {2000},
volume = {11},
number = {4},
pages = {413--422}
}
|
|||||
| Barabesi, L. & Fattorini, L. | 1998 | The use of replicated plot, line and point sampling for estimating species abundance and ecological diversity [BibTeX] |
Environmental and Ecological Statistics 5:353--370 | ||
BibTeX:
@article{BarFat98,
author = {Barabesi, L. and Fattorini, L.},
title = {The use of replicated plot, line and point sampling for estimating species abundance and ecological diversity},
journal = {Environmental and Ecological Statistics},
year = {1998},
volume = {5},
pages = {353--370}
}
|
|||||
| Barabesi, L. & Fattorini, L. | 1994 | A note on bandwidth selections for kernel density estimators at endpoints [BibTeX] |
Metron 52:43--56 | ||
BibTeX:
@article{BarFat94,
author = {Barabesi, L. and Fattorini, L.},
title = {A note on bandwidth selections for kernel density estimators at endpoints},
journal = {Metron},
year = {1994},
volume = {52},
pages = {43--56}
}
|
|||||
| Barabesi, L. & Fattorini, L. | 1993 | Asymptotic properties of orthogonal series density estimators in line transect sampling with grouped data [BibTeX] |
Metron 51:59--81 | ||
BibTeX:
@article{BarFat93,
author = {Barabesi, L. and Fattorini, L.},
title = {Asymptotic properties of orthogonal series density estimators in line transect sampling with grouped data},
journal = {Metron},
year = {1993},
volume = {51},
pages = {59--81}
}
|
|||||
| Barabesi, L., Greco, L. & Naddeo, S. | 2002 | Density estimation in line transect sampling with grouped data by local least squares [BibTeX] |
Environmetrics 13:167--176 | DOI | |
BibTeX:
@article{Barabesi2002,
author = {Barabesi, Lucio and Greco, Luigi and Naddeo, Stefania},
title = {Density estimation in line transect sampling with grouped data by local least squares},
journal = {Environmetrics},
year = {2002},
volume = {13},
pages = {167--176},
doi = {10.1002/env.524}
}
|
|||||
| Barbraud, C. & Thiebot, J.-B. | 2009 | On the importance of estimating detection probabilities from at-sea surveys of flying seabirds [BibTeX] |
Journal of Avian Biology 40:1--7 | DOI | |
BibTeX:
@article{Barbraud2009,
author = {Christophe Barbraud and Jean-Baptiste Thiebot},
title = {On the importance of estimating detection probabilities from at-sea surveys of flying seabirds},
journal = {Journal of Avian Biology},
year = {2009},
volume = {40},
pages = {1--7},
doi = {10.1111/j.1600-048X.2009.04653.x}
}
|
|||||
| Barlow, J. | 1999 | Trackline detection probability for long-diving whales [BibTeX] |
Marine Mammal Survey and Assessment Methods :209--221 | ||
BibTeX:
@incollection{Bar99,
author = {Barlow, J.},
title = {Trackline detection probability for long-diving whales},
booktitle = {Marine Mammal Survey and Assessment Methods},
publisher = {Balkema},
year = {1999},
pages = {209--221}
}
|
|||||
| Barlow, J. | 2006 | Cetacean abundance in Hawaiian waters estimated from a summer/fall survey in 2002 | Marine Mammal Science 22:446--464 | ||
| Abstract: Cetacean abundance is estimated for the U.S. Exclusive Economic Zone (EEZ) around the Hawaiian Islands based on a ship line-transect survey from August to November, 2002. Sighting detection functions are estimated from this and other NOAA research surveys from 1986 to 2002 using a new, multiple-covariate approach. Twenty-four species were seen on this survey, including two species (Fraser's dolphin [Lagenodelphis hosei] and sei whale [Balaenoptera borealis]) that had not been previously documented to occur in Hawaiian waters. The most abundant large whales are sperm whales (Physeter macrocephalus) and Bryde's whales (Balaenoptera edeni). The most abundant delphinids are pilot whales (Globicephala macrorhynchus), rough-toothed dolphins (Steno bredanensis), Fraser's dolphins, spotted dolphins (Stenella attenuata), and striped dolphins (Stenella coeruleoalba). Dwarf and pygmy sperm whales (Kogia sima and Kogia breviceps) and Cuvier's beaked whales (Ziphius cavirostris) are also estimated to be quite abundant. Some of the migratory baleen whales (fin whales [Balaenoptera physalus], sei whales, minke whales [B. acutorostrata], and humpback whales [Megaptera novaeangliae]) were seen only late in the survey. Abundance is estimated for 19 cetacean species. The overall density of cetaceans is low in the study area, especially for delphinids. The precision of density and abundance estimates is generally low for all species because of the low number of sightings. © 2006 the Society for Marine Mammalogy. | |||||
BibTeX:
@article{Bar06,
author = {Barlow, J.},
title = {Cetacean abundance in Hawaiian waters estimated from a summer/fall survey in 2002},
journal = {Marine Mammal Science},
year = {2006},
volume = {22},
number = {2},
pages = {446--464}
}
|
|||||
| Barlow, J. | 2003 | Cetacean abundance in Hawaiian waters during summer/fall of 2002 [BibTeX] |
: | ||
BibTeX:
@techreport{Barlow2003,
author = {Jay Barlow},
title = {Cetacean abundance in {H}awaiian waters during summer/fall of 2002},
year = {2003},
number = {LJ-03-13}
}
|
|||||
| Barlow, J. | 1997 | Preliminary estimates of cetacean abundance off California, Oregon, and Washington based on a 1996 ship survey and comparisons of passing and closing modes [BibTeX] |
: | ||
BibTeX:
@techreport{Bar97,
author = {Barlow, J.},
title = {Preliminary estimates of cetacean abundance off {C}alifornia, {O}regon, and {W}ashington based on a 1996 ship survey and comparisons of passing and closing modes},
year = {1997},
number = {LJ-97-11}
}
|
|||||
| Barlow, J. | 1994 | Abundance of large whales in California coastal waters: a comparison of ship surveys in 1979/80 and in 1991 [BibTeX] |
Report of the International Whaling Commission 44:399--406 | ||
BibTeX:
@article{Bar94,
author = {Barlow, J.},
title = {Abundance of large whales in {C}alifornia coastal waters: a comparison of ship surveys in 1979/80 and in 1991},
journal = {Report of the International Whaling Commission},
year = {1994},
volume = {44},
pages = {399--406}
}
|
|||||
| Barlow, J. | 1988 | Harbor porpoise, Phocoena phocoena, abundance estimation for California, Oregon and Washington: I. Ship surveys [BibTeX] |
Fishery Bulletin 86:417--431 | ||
BibTeX:
@article{Bar88,
author = {Barlow, J.},
title = {Harbor porpoise, \textit{Phocoena phocoena}, abundance estimation for {C}alifornia, {O}regon and {W}ashington: I. Ship surveys},
journal = {Fishery Bulletin},
year = {1988},
volume = {86},
pages = {417--431}
}
|
|||||
| Barlow, J., Ferguson, M. C., Perrin, W. F., Ballance, L., Gerrodette, T., Joyce, G., Macleod, C. D., Mullin, K., Palka, D. L. & Waring, G. | 2006 | Abundance and densities of beaked and bottlenose whales (family Ziphiidae) [BibTeX] |
Journal of Cetacean Research and Management 7:263--270 | ||
BibTeX:
@article{Barlow2006,
author = {Jay Barlow and Megan C. Ferguson and William F. Perrin and Lisa Ballance and Tim Gerrodette and Gerald Joyce and Colin D. Macleod and Keith Mullin and Debra L. Palka and Gordon Waring},
title = {Abundance and densities of beaked and bottlenose whales (family {Z}iphiidae)},
journal = {Journal of Cetacean Research and Management},
year = {2006},
volume = {7},
pages = {263--270}
}
|
|||||
| Barlow, J., Gerrodette, T. & Forcada, J. | 2001 | Factors affecting perpendicular sighting distances on shipboard line-transect surveys for cetaceans [BibTeX] |
Journal of Cetacean Research and Management 3:201-212 | ||
BibTeX:
@article{baretal2001,
author = {Barlow, J and Gerrodette, T and Forcada, J},
title = {Factors affecting perpendicular sighting distances on shipboard line-transect surveys for cetaceans},
journal = {Journal of Cetacean Research and Management},
year = {2001},
volume = {3},
pages = {201-212}
}
|
|||||
| Barlow, J., Gerrodette, T. & Silber, G. | 1997 | First estimates of vaquita abundance [BibTeX] |
Marine Mammal Science 13:44--58 | ||
BibTeX:
@article{Baretal97,
author = {Barlow, J. and Gerrodette, T. and Silber, G.},
title = {First estimates of vaquita abundance},
journal = {Marine Mammal Science},
year = {1997},
volume = {13},
pages = {44--58}
}
|
|||||
| Barlow, J., Oliver, C. W., Jackson, T. D. & Taylor, B. L. | 1988 | Harbor porpoise, Phocoena phocoena, abundance estimation for California, Oregon and Washington: II. aerial surveys [BibTeX] |
Fishery Bulletin 86:433--444 | ||
BibTeX:
@article{Baretal88,
author = {Barlow, J. and Oliver, C. W. and Jackson, T. D. and Taylor, B. L.},
title = {Harbor porpoise, \textit{Phocoena phocoena}, abundance estimation for {C}alifornia, {O}regon and {W}ashington: II. aerial surveys},
journal = {Fishery Bulletin},
year = {1988},
volume = {86},
pages = {433--444}
}
|
|||||
| Barlow, J. & Taylor, B. | 2005 | Estimates of sperm whale abundance in the northeastern temperate Pacific from a combined acoustic and visual survey [BibTeX] |
Marine Mammal Science 21:429--445 | ||
| Review: Of all cetaceans, sperm whales (Physeter macrocephalus) are most amenable to acoustic detection and survey methods. Sperm whale sounds have been classified as (Weilgart and Whitehead 1988): ‘‘usual’’ clicks (0.4–1.0-s period):The usual clicks are relatively loud (180–223 dB re: 1 lP @ 1 m) , and previous studies have shown these sounds to be detectable at 10–16 km under optimal conditions slow clicks (5–8-s period): The slow clicks are thought to be produced only by males and are predicted to propagate up to 60 km codas (patterned clicks) and creaks (a series of very rapid clicks): Codas and creaks, which are of lesser amplitude, are not detectable far from their source. The frequency distribution of clicks (<100 Hz to 30 kHz,) extends above the dominant range of ship and flow noise, making these sounds easier to detect with a towed array system than the lower frequency sounds of baleen whales. Sperm whale clicks have a rapid rise time (<1 ms) which improves the precision of localization methods based on time-of-arrival difference between two hydrophones. A significant fraction of sperm whales are unavailable to visual observers (Kasamatsu and Joyce 1995, Barlow and Sexton 1996) because they can dive for an hour or more (Leatherwood et al. 1982); therefore, acoustic surveys are potentially more valuable for sperm whales than for many other species. MUITO INTERESSANTE (measurement error related):Our bearings represent conical bearing angles, and perpendicular distance estimated by these methods is the distance in three dimensions from the path traced by the towed array. Line-transect methods are based on two-dimensional distances from the trackline, measured at the surface. From the perspective of estimating linetransect density, acoustic perpendicular distances are biased and would be greater than the perpendicular distance at the surface unless the sperm whales were vocalizing at the exact depth of the array. Because sperm whales dive to great depths, this bias may not be trivial. Unfortunately, the bias cannot be corrected without knowing the depth of the vocalizing animals. We explored the likely magnitude of this bias by assuming that vocalizing sperm whales were at 600 m depth (slightly greater than the mean dive depth of 500 m reported by Whitehead (2003) and 500 m below the depth of the array) and by using the Pythagorean formula to estimate perpendicular distance at the surface from the acoustically estimated perpendicular distance. It is said later in the results that: Effective strip widths were also estimated with revised perpendicular distances based on an assumed whale depth of 500 m below the hydrophone array. For comparability, models were constrained to the half-normal key function. These effective strip widths differed from those given in Table 1 by less than one percent. For typical sperm whale acoustic detection distances, the effect of whale depth appears to have a trivial effect on density and abundance estimation. THIS IS BECAUSE THE WHALES ARE SO FAR AWAY (ON AVERAGE) FROM THE SHIP THAT THE PERPENDICULAR OR RECORDED DISTANCE ARE PRETTY MUCH THE SAME Overall population size from visual detections was estimated as an average of the Beaufort-stratified estimates, weighted by the inverse of their variances. NOTE THIS IS ONLY SENSIBLE IF DENSITY IS INDEPENDENT OF SEA STATE |
|||||
BibTeX:
@article{Barlow2005,
author = {Barlow, J. and Taylor, B.L.},
title = {Estimates of sperm whale abundance in the northeastern temperate {P}acific from a combined acoustic and visual survey},
journal = {Marine Mammal Science},
year = {2005},
volume = {21},
number = {3},
pages = {429--445}
}
|
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| Barlow, J. & Taylor, B. | 2001 | Estimates of large whale abundance off California, Oregon, Washington, and Baja California based on 1993 and 1996 ship surveys [BibTeX] |
: | ||
BibTeX:
@techreport{Barlow2001,
author = {Barlow, J. and Taylor, B.},
title = {Estimates of large whale abundance off California, Oregon, Washington, and Baja California based on 1993 and 1996 ship surveys},
year = {2001},
number = {LJ-01-03}
}
|
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| Barnes, A., Hill, G. J. E. & Wilson, G. R. | 1986 | Correcting for incomplete sighting in aerial surveys of kangaroos [BibTeX] |
Australian Wildlife Research 13:339--348 | ||
BibTeX:
@article{Baretal86,
author = {Barnes, A. and Hill, G. J. E. and Wilson, G. R.},
title = {Correcting for incomplete sighting in aerial surveys of kangaroos},
journal = {Australian Wildlife Research},
year = {1986},
volume = {13},
pages = {339--348}
}
|
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| Barnes, R. F. W. | 2001 | How reliable are dung counts for estimating elephant numbers? [BibTeX] |
African Journal of Ecology 39:1--9 | ||
BibTeX:
@article{Bar01,
author = {Barnes, R. F. W.},
title = {How reliable are dung counts for estimating elephant numbers?},
journal = {African Journal of Ecology},
year = {2001},
volume = {39},
pages = {1--9}
}
|
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| Barnes, R. F. W. & Barnes, K. L. | 1992 | Estimating decay rates of elephant dung-piles in forest [BibTeX] |
African Journal of Ecology 30:316--321 | ||
BibTeX:
@article{BarBar92,
author = {Barnes, R. F. W. and Barnes, K. L.},
title = {Estimating decay rates of elephant dung-piles in forest},
journal = {African Journal of Ecology},
year = {1992},
volume = {30},
pages = {316--321}
}
|
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| Barnes, R. F. W., Blom, A., Alers, M. P. T. & Barnes, K. L. | 1995 | An estimate of the numbers of forest elephants in Gabon [BibTeX] |
Journal of Tropical Ecology 11:27--37 | ||
BibTeX:
@article{Baretal95,
author = {Barnes, R. F. W. and Blom, A. and Alers, M. P. T. and Barnes, K. L.},
title = {An estimate of the numbers of forest elephants in {G}abon},
journal = {Journal of Tropical Ecology},
year = {1995},
volume = {11},
pages = {27--37}
}
|
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| Barnes, R. F. W. & Dunn, A. | 2002 | Estimating forest elephant density in Sapo National Park (Liberia) with a rainfall model [BibTeX] |
African Journal of Ecology 40:159--163 | ||
BibTeX:
@article{BarDun02,
author = {Barnes, R. F. W. and Dunn, A.},
title = {Estimating forest elephant density in {S}apo {N}ational {P}ark (Liberia) with a rainfall model},
journal = {African Journal of Ecology},
year = {2002},
volume = {40},
pages = {159--163}
}
|
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| Barraclough, R. K. | 2000 | Distance Sampling: A discussion document produced for the Department of Conservation [BibTeX] |
: | ||
BibTeX:
@techreport{Barraclough2000,
author = {Barraclough, R. K.},
title = {Distance Sampling: A discussion document produced for the Department of Conservation},
year = {2000},
number = {175}
}
|
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| Barrio, I., Acevedo, P. & Tortosa, F. | 2010 | Assessment of methods for estimating wild rabbit population abundance in agricultural landscapes [BibTeX] |
European Journal of Wildlife Research 56:335-340 | URL | |
BibTeX:
@article{springerlink:10.1007/s10344-009-0327-7,
author = {Barrio, Isabel and Acevedo, Pelayo and Tortosa, Francisco},
title = {Assessment of methods for estimating wild rabbit population abundance in agricultural landscapes},
journal = {European Journal of Wildlife Research},
publisher = {Springer Berlin / Heidelberg},
year = {2010},
volume = {56},
pages = {335-340},
note = {10.1007/s10344-009-0327-7},
url = {http://dx.doi.org/10.1007/s10344-009-0327-7}
}
|
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| Barry, S. C. & Welsh, A. H. | 2001 | Distance sampling methodology | Journal of the Royal Statistical Society. Series B: Statistical Methodology 63:31--53 | ||
| Abstract: We consider the method of distance sampling described by Buckland, Anderson, Burnham and Laake in 1993. We explore the properties of the methodology in simple cases chosen to allow direct and accessible comparisons of distance sampling in the design-and model-based frameworks. In particular, we obtain expressions for the bias and variance of the distance sampling estimator of object density and for the expected value of the recommended analytic variance estimator within each framework. These results enable us to clarify aspects of the performance of the methodology which may be of interest to users and potential users of distance sampling. | |||||
BibTeX:
@article{Barry2001,
author = {Barry, S. C. and Welsh, A. H.},
title = {Distance sampling methodology},
journal = {Journal of the Royal Statistical Society. Series B: Statistical Methodology},
year = {2001},
volume = {63},
number = {1},
pages = {31--53}
}
|
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| Bart, J., Droege, S., Geissler, P., Peterjohn, B. & Ralph, C. J. | 2004 | Density estimation in wildlife surveys [BibTeX] |
Wildlife Society Bulletin 32:1242--1247 | URL | |
BibTeX:
@article{Baretal04,
author = {Bart, J and Droege, S and Geissler, P and Peterjohn, B and Ralph, C J},
title = {Density estimation in wildlife surveys},
journal = {Wildlife Society Bulletin},
year = {2004},
volume = {32},
pages = {1242--1247},
url = {http://www.fs.fed.us/psw/publications/ralph/psw_2005_ralph(bart)001.pdf}
}
|
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| Bart, J. & Herrick, J. | 1984 | Diurnal timing of bird surveys [BibTeX] |
The Auk 101:384--387 | ||
BibTeX:
@article{BarHer84,
author = {Bart, J. and Herrick, J.},
title = {Diurnal timing of bird surveys},
journal = {The Auk},
year = {1984},
volume = {101},
pages = {384--387}
}
|
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| Bart, J. & Schoultz, J. D. | 1984 | Reliability of singing bird surveys: changes in observer efficiency with avian density [BibTeX] |
The Auk 101:307--318 | ||
BibTeX:
@article{BarSch84,
author = {Bart, J. and Schoultz, J. D.},
title = {Reliability of singing bird surveys: changes in observer efficiency with avian density},
journal = {The Auk},
year = {1984},
volume = {101},
pages = {307--318}
}
|
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| Batcheler, C. L. | 1975 | Development of a distance method for deer census from pellet groups [BibTeX] |
Journal of Wildlife Management 39:641--652 | ||
BibTeX:
@article{Bat75,
author = {Batcheler, C. L.},
title = {Development of a distance method for deer census from pellet groups},
journal = {Journal of Wildlife Management},
year = {1975},
volume = {39},
pages = {641--652}
}
|
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| Beare, D., Reid, D. & Petitgas, P. | 2002 | Spatio-temporal patterns in herring (Clupea harengus L.) school abundance and size in the northwest North Sea: Modelling space-time dependencies to allow examination of the impact of local school abundance on school size | ICES Journal of Marine Science 59:469--479 | ||
| Abstract: As part of the EU-funded project "CLUSTER" a database was constructed of herring schools identified during a series of acoustic surveys in the northwest North Sea. Among other descriptors, the database included each schools' height, length, and acoustic backscattering energy (Sa). The number of schools per nautical mile. EDSU (Elementary Distance Sampling Unit) was also recorded. The relationships between local school count and school backscattering energy to time-of-day and location were first modelled using multiple regression techniques. The results indicate a considerable degree of non-linear dependency on both time-of-day and location. Herring-school counts per EDSU tended to be high during the middle part of the day and lower at dawn and dusk and were higher along the continental shelf edge about 130 m west of Orkney and Shetland. The regression models, by definition, also allow variability due to each explanatory variable to be assayed and divided. This feature meant that their output could be used to explore further into the relationships among the schools. In this paper the residual variability from the regression models is used to describe density-dependent relationships among herring schools, i.e. we asked "To what extent does local herring school abundance influence the size (backscattering energy) of a given school?" It is concluded that herring school size is regulated mainly by location and time-of-day and that "measured" school size is not influenced by the local "school count per EDSU". The results and their implications are discussed. © 2002 International Council for the Exploration of the Sea. Published by Elsevier Science Ltd. All rights reserved. | |||||
BibTeX:
@article{Beare2002,
author = {Beare, D.J. and Reid, D.G. and Petitgas, P.},
title = {Spatio-temporal patterns in herring \textit{(Clupea harengus L.)} school abundance and size in the northwest North Sea: Modelling space-time dependencies to allow examination of the impact of local school abundance on school size},
journal = {ICES Journal of Marine Science},
year = {2002},
volume = {59},
number = {3},
pages = {469--479}
}
|
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| Beasom, S. L., H. J. C. & Cain, J. R. | 1981 | The effect of strip width on helicopter censusing of deer [BibTeX] |
Journal of Range Management 34:36--37 | ||
BibTeX:
@article{Beaetal81,
author = {Beasom, S. L., Hood, J. C. and Cain, J. R.},
title = {The effect of strip width on helicopter censusing of deer},
journal = {Journal of Range Management},
year = {1981},
volume = {34},
pages = {36--37}
}
|
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| Beavers, S. C. & Ramsey, F. L. | 1998 | Detectability analysis in transect surveys [BibTeX] |
Journal of Wildlife Management 62:948--957 | ||
| Review: Tenho um workspace com coisas para implementar esta abordagem - ver pasta amarela Fancy's stuff | |||||
BibTeX:
@article{BeaRam98,
author = {Beavers, S. C. and Ramsey, F. L.},
title = {Detectability analysis in transect surveys},
journal = {Journal of Wildlife Management},
year = {1998},
volume = {62},
pages = {948--957}
}
|
|||||
| Becker, B. H., Beissinger, S. R. & Carter, H. R. | 1997 | At-sea density monitoring of marbled murrelets in central California: Methodological considerations | Condor 99:743--755 | ||
| Abstract: We conducted at-sea line transect surveys for Marbled Murrelets (Brachyramphus marmoratus) to determine density off the coast of central California and to explore the utility of various survey protocols. Surveys were designed to compare line versus strip transect methods, and reveal the effects of distance from shore, viewing conditions and seasonal trends on density estimates. On consecutive days, we conducted 12 paired (24 total) at-sea line and strip transect surveys that were 20 km long at 400 m and 800 m from shore. We also performed nine surveys that were 10 km long and at distances of 400 m. 900 m, 1.400 m, 2,400 m, 3,400 m and 4.400 m from shore. Density estimates calculated using line transects were significantly greater than estimates based on strip transects of 100 m and 200 m widths. Marbled Murrelet density ranged from 2.4-39.4 birds km-2 at 400 m from shore, and from 0.0-16.5 birds km-2 at 800 m from shore. Density was higher on the 400 m than on the 800 m survey on 22 of 24 survey days. Densities measured on consecutive days were highly correlated on the 400 m transect but not on the 800 m transect. Line transect densities on the 400 m transect were higher when conducted under better viewing conditions. Line transects had higher statistical power to detect trends than strip transects. Statistical power analyses indicated only a 24% chance of detecting a population declining by 5% per year over 5 years when surveying line transects 20 km in length five times a year. Power to detect a 5% annual change increased to 57% when surveying line transects five times per year over 10 years. Survey design should strive to minimize variability in bird density in order to maximize likelihood of detecting population trends. An increase in the number of surveys per breeding season, length of a transect, or duration of monitoring effort should increase power to detect trends in murrelet density. We suggest that at-sea surveys should focus on detecting trends in density rather than population size. | |||||
BibTeX:
@article{Becker1997,
author = {Becker, B. H. and Beissinger, S. R. and Carter, H. R.},
title = {At-sea density monitoring of marbled murrelets in central California: Methodological considerations},
journal = {Condor},
year = {1997},
volume = {99},
number = {3},
pages = {743--755}
}
|
|||||
| Becker, E. F. & Quang, P. X. | 2009 | A gamma-shaped detection function for line-transect surveys with mark-recapture and covariate data [BibTeX] |
Journal of Agricultural, Biological, and Environmental Statistics 14:207-223 | ||
BibTeX:
@article{Becker,
author = {E. F. Becker and P. X. Quang},
title = {A gamma-shaped detection function for line-transect surveys with mark-recapture and covariate data},
journal = {Journal of Agricultural, Biological, and Environmental Statistics},
year = {2009},
volume = {14},
pages = {207-223}
}
|
|||||
| Bell, H. L. & Ferrier, S. | 1985 | The reliability of estimates of density from transect counts [BibTeX] |
Corella 9:3--13 | ||
BibTeX:
@article{BelFer85,
author = {Bell, H. L. and Ferrier, S.},
title = {The reliability of estimates of density from transect counts},
journal = {Corella},
year = {1985},
volume = {9},
pages = {3--13}
}
|
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| Bengtson, J. L., Blix, A. S., Boyd, I. L., Cameron, M. F., Hanson, M. B. & Laake, J. L. | 1995 | Antarctic pack-ice seal research, February and March 1995 [BibTeX] |
Antarctic Journal 30:191--193 | ||
BibTeX:
@article{Benetal95,
author = {Bengtson, J. L. and Blix, A. S. and Boyd, I. L. and Cameron, M. F. and Hanson, M. B. and Laake, J. L.},
title = {Antarctic pack-ice seal research, {F}ebruary and {M}arch 1995},
journal = {Antarctic Journal},
year = {1995},
volume = {30},
pages = {191--193}
}
|
|||||
| Bergstedt, R. A. & Anderson, D. R. | 1990 | Evaluation of line transect sampling based on remotely sensed data from underwater video [BibTeX] |
Transactions of the American Fisheries Society 119:86--91 | ||
BibTeX:
@article{Ber90,
author = {Bergstedt, R. A. and Anderson, D. R.},
title = {Evaluation of line transect sampling based on remotely sensed data from underwater video},
journal = {Transactions of the American Fisheries Society},
year = {1990},
volume = {119},
pages = {86--91}
}
|
|||||
| Berrow, S., O’brien, J., O’Connor, I. & Mcgrath, D. | 2009 | Abundance estimate and acoustic monitoring of harbour porpoise Phocoena phocoena in the Blasket Islands candidate Special Area of Conservation [BibTeX] |
Biology & Environment: Proceedings of the Royal Irish Academy 109:35-46 | ||
BibTeX:
@article{Berrow2009,
author = {Simon Berrow and Joanne O’brien and Ian O’Connor and David Mcgrath},
title = {Abundance estimate and acoustic monitoring of harbour porpoise \textit{Phocoena phocoena} in the Blasket Islands candidate Special Area of Conservation},
journal = {Biology \& Environment: Proceedings of the Royal Irish Academy},
year = {2009},
volume = {109},
pages = {35-46}
}
|
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| Berrow, S., O’brien, J., O’Connor, I. & Mcgrath, D. | 2007 | Abundance estimate and acoustic monitoring of harbour porpoise Phocoena phocoena in the Blasket Islands candidate Special Area of Conservation [BibTeX] |
: | ||
BibTeX:
@techreport{Berrow2007,
author = {Simon Berrow and Joanne O’brien and Ian O’Connor and David Mcgrath},
title = {Abundance estimate and acoustic monitoring of harbour porpoise \textit{Phocoena phocoena} in the Blasket Islands candidate Special Area of Conservation},
year = {2007}
}
|
|||||
| Best, L. B. | 1981 | Seasonal changes in detection of individual bird species [BibTeX] |
Estimating Numbers of Terrestrial Birds, Studies in Avian Biology No. 6 :252--261 | ||
BibTeX:
@incollection{Bes81,
author = {Best, L. B.},
title = {Seasonal changes in detection of individual bird species},
booktitle = {Estimating Numbers of Terrestrial Birds, Studies in Avian Biology No. 6},
publisher = {Cooper Ornithological Society},
year = {1981},
pages = {252--261}
}
|
|||||
| Best, P. B. & Butterworth, D. S. | 1980 | Report of the Southern Hemisphere minke whale assessment cruise, 1978/79 [BibTeX] |
Report of the International Whaling Commission 30:257--283 | ||
BibTeX:
@article{BesBut80,
author = {Best, P. B. and Butterworth, D. S.},
title = {Report of the {S}outhern {H}emisphere minke whale assessment cruise, 1978/79},
journal = {Report of the International Whaling Commission},
year = {1980},
volume = {30},
pages = {257--283}
}
|
|||||
| Bibby, C., Jones, M. & Marsden, S. | 1998 | Expedition Field Techniques - Bird Surveys [BibTeX] |
: | ||
BibTeX:
@book{Bibby1998,
author = {Colin Bibby and Martin Jones and Stuart Marsden},
title = {Expedition Field Techniques - Bird Surveys},
publisher = {Expedition Advisory Centre, Royal Geographical Society},
year = {1998}
}
|
|||||
| Bibby, C. J. & Buckland, S. T. | 1987 | Bias of bird census results due to detectability varying with habitat [BibTeX] |
Acta Ecologica 8:103--112 | ||
BibTeX:
@article{Bibbuc87,
author = {Bibby, C. J. and Buckland, S. T.},
title = {Bias of bird census results due to detectability varying with habitat},
journal = {Acta Ecologica},
year = {1987},
volume = {8},
pages = {103--112}
}
|
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| Bibby, C. J., Burgess, N. D. & Hill, D. A. | 1992 | Bird Census Techniques [BibTeX] |
: | ||
BibTeX:
@book{Bibetal92,
author = {Bibby, C. J. and Burgess, N. D. and Hill, D. A.},
title = {Bird Census Techniques},
publisher = {Academic Press},
year = {1992}
}
|
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| Bibby, C. J., Burgess, N. D., Hill, D. A. & Mustoe, S. | 2000 | Bird Census Techniques, 2nd Ed. [BibTeX] |
: | ||
BibTeX:
@book{Bibetal00,
author = {Bibby, C. J. and Burgess, N. D. and Hill, D. A. and Mustoe, S.},
title = {Bird Census Techniques, 2nd Ed.},
publisher = {Academic Press},
year = {2000}
}
|
|||||
| Bibby, C. J., Phillips, B. N. & Seddon, A. J. E. | 1985 | Birds of restocked conifer plantations in Wales [BibTeX] |
Journal of Applied Ecology 22:619--633 | ||
BibTeX:
@article{Bibetal85,
author = {Bibby, C. J. and Phillips, B. N. and Seddon, A. J. E.},
title = {Birds of restocked conifer plantations in {W}ales},
journal = {Journal of Applied Ecology},
year = {1985},
volume = {22},
pages = {619--633}
}
|
|||||
| Biswas, S. & Sankar, K. | 2002 | Prey abundance and food habit of tigers (Panthera tigris tigris) in Pench National Park, Madhya Pradesh, India [BibTeX] |
Journal of Zoology 256:411--420 | ||
BibTeX:
@article{Biswas2002,
author = {Biswas, S. and Sankar, K.},
title = {Prey abundance and food habit of tigers (\textit{Panthera tigris tigris}) in {Pench National Park, Madhya Pradesh, India}},
journal = {Journal of Zoology},
year = {2002},
volume = {256},
pages = {411--420}
}
|
|||||
| Blake, J. G., Hanowski, J. M., Niemi, G. J. & Collins, P. T. | 1994 | Annual variation in bird populations of mixed-conifer northern hardwood forests [BibTeX] |
Condor 96:381--399 | ||
BibTeX:
@article{Blaetal94,
author = {Blake, J. G. and Hanowski, J. M. and Niemi, G. J. and Collins, P. T.},
title = {Annual variation in bird populations of mixed-conifer northern hardwood forests},
journal = {Condor},
year = {1994},
volume = {96},
pages = {381--399}
}
|
|||||
| Blake, J. G., Hanowski, J. M., Niemi, G. J. & Collins, P. T. | 1991 | Hourly variation in transect counts of birds [BibTeX] |
Ornis Fennica 68:139--147 | ||
BibTeX:
@article{Blaetal91,
author = {Blake, J. G. and Hanowski, J. M. and Niemi, G. J. and Collins, P. T.},
title = {Hourly variation in transect counts of birds},
journal = {Ornis Fennica},
year = {1991},
volume = {68},
pages = {139--147}
}
|
|||||
| Blaylock, R. A. | 1993 | Distribution and Abundance of the Cownose Ray, Rhinoptera bonasus, in Lower Chesapeake Bay [BibTeX] |
Estuaries 16:255--263 | ||
BibTeX:
@article{Blaylock1993,
author = {Robert A. Blaylock},
title = {Distribution and Abundance of the {Cownose Ray, \textit{Rhinoptera bonasus}, in Lower Chesapeake Bay}},
journal = {Estuaries},
year = {1993},
volume = {16},
pages = {255--263}
}
|
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| Blom, A., Almaši, A., Heitkönig, I., Kpanou, J.-B. & Prins, H. | 2001 | A survey of the apes in the Dzanga-Ndoki National Park, Central African Republic: A comparison between the census and survey methods of estimating the gorilla (Gorilla gorilla gorilla) and chimpanzee (Pan troglodytes) nest group density | African Journal of Ecology 39:98--105 | ||
| Abstract: A survey of apes was carried out between October 1996 and May 1997 in the Dzanga sector of the Dzanga-Ndoki National Park, Central African Republic (CAR), to estimate gorilla (Gorilla gorilla gorilla) and chimpanzee (Pan troglodytes) densities. The density estimates were based on nest counts. The strip transect census and the line transect survey method (Standing Crop Nest Count) were used to estimate the gorilla nest group density. The strip transect has been most commonly used to date. It assumes that all nest groups within the width of the strip are detected, but as this assumption is easily violated in the dense tropical rain forest, the line transect survey was also used. In this method, only the nest groups on the transect line itself should be detected. This method proved to be an adequate and easy technique for estimating animal densities in dense vegetation. The gorilla density of 1.6 individuals km-2 (line transect survey method) found for the Dzanga sector is one of the highest densities ever reported in the literature for the Western lowland gorilla. The density estimate for chimpanzees was 0.16 individuals km-2 (census method). The results of this study confirm the importance of the Dzanga-Ndoki National Park for primate conservation. | |||||
BibTeX:
@article{Blom2001,
author = {Blom, A. and Alma\v{s}i, A. and Heitk\"{o}nig, I.M.A. and Kpanou, J.-B. and Prins, H.H.T.},
title = {A survey of the apes in the Dzanga-Ndoki National Park, Central African Republic: A comparison between the census and survey methods of estimating the gorilla (\textit{Gorilla gorilla gorilla}) and chimpanzee (\textit{Pan troglodytes}) nest group density},
journal = {African Journal of Ecology},
year = {2001},
volume = {39},
number = {1},
pages = {98--105}
}
|
|||||
| Boano, G. & Toffoli, R. | 2002 | A line transect survey of wintering raptors in the western Po plain of northern Italy [BibTeX] |
Journal Of Raptor Research 36:128-135 | ||
BibTeX:
@article{Boano2002,
author = {Boano, G. and Toffoli, R.},
title = {A line transect survey of wintering raptors in the western {Po plain of northern Italy}},
journal = {Journal Of Raptor Research},
year = {2002},
volume = {36},
pages = {128-135}
}
|
|||||
| Bodkin, J. L. & Udevitz, M. S. | 1999 | An aerial survey method to estimate sea otter abundance [BibTeX] |
Marine Mammal Survey and Assessment Methods :115--126 | ||
BibTeX:
@incollection{BodUde99,
author = {Bodkin, J. L. and Udevitz, M. S.},
title = {An aerial survey method to estimate sea otter abundance},
booktitle = {Marine Mammal Survey and Assessment Methods},
publisher = {Balkema},
year = {1999},
pages = {115--126}
}
|
|||||
| de Boer, M. | 2010 | Spring distribution and density of minke whale Balaenoptera acutorostrata along an offshore bank in the central North Sea. [BibTeX] |
Marine Ecology Progress Series 408:265--274 | ||
BibTeX:
@article{Boer2010,
author = {M.N. de Boer},
title = {Spring distribution and density of minke whale \textit{Balaenoptera acutorostrata} along an offshore bank in the central {North Sea}.},
journal = {Marine Ecology Progress Series},
year = {2010},
volume = {408},
pages = {265--274}
}
|
|||||
| Boer, M. N. & Simmonds, M. P. | 2003 | Small cetaceans along the coasts of Wales and Southwest England [BibTeX] |
: | ||
BibTeX:
@techreport{Boer2003,
author = {Boer, M. N. and Simmonds, M. P.},
title = {Small cetaceans along the coasts of Wales and Southwest England},
year = {2003}
}
|
|||||
| Bollinger, E. K., Gavin, T. A. & McIntyre, D. C. | 1988 | Comparison of transects and circular-plots for estimating bobolink densities [BibTeX] |
Journal of Wildlife Management 52:777--786 | ||
BibTeX:
@article{Boletal88,
author = {Bollinger, E. K. and Gavin, T. A. and McIntyre, D. C.},
title = {Comparison of transects and circular-plots for estimating bobolink densities},
journal = {Journal of Wildlife Management},
year = {1988},
volume = {52},
pages = {777--786}
}
|
|||||
| Bonnell, M. L. & Ford, R. G. | 1987 | California sea lion distribution: a statistical analysis of aerial transect data [BibTeX] |
Journal of Wildlife Management 51:13--20 | ||
BibTeX:
@article{BonFor87,
author = {Bonnell, M. L. and Ford, R. G.},
title = {California sea lion distribution: a statistical analysis of aerial transect data},
journal = {Journal of Wildlife Management},
year = {1987},
volume = {51},
pages = {13--20}
}
|
|||||
| Booth, C. | 2010 | Variation in habitat preference and distribution of harbour porpoises west of Scotland [BibTeX] |
: | ||
BibTeX:
@phdthesis{Booth2010,
author = {Booth, C.},
title = {Variation in habitat preference and distribution of harbour porpoises west of Scotland},
school = {University of St Andrews},
year = {2010}
}
|
|||||
| Borchers, D., Laake, J., Southwell, C. & Paxton, C. | 2006 | Accommodating unmodeled heterogeneity in double-observer distance sampling surveys | Biometrics 62:372--378 | ||
| Abstract: Mark-recapture models applied to double-observer distance sampling data neglect the information on relative detectability of objects contained in the distribution of observed distances. A difference between the observed distribution and that predicted by the mark-recapture model is symptomatic of a failure of the assumption of zero correlation between detection probabilities implicit in the mark-recapture model. We develop a mark-recapture-based model that uses the observed distribution to relax this assumption to zero correlation at only one distance. We demonstrate its usefulness in coping with unmodeled heterogeneity using data from an aerial survey of crabeater seals in the Antarctic. © 2005, The International Biometric Society. | |||||
BibTeX:
@article{Borchers2006,
author = {Borchers, D.L. and Laake, J.L. and Southwell, C. and Paxton, C.G.M.},
title = {Accommodating unmodeled heterogeneity in double-observer distance sampling surveys},
journal = {Biometrics},
year = {2006},
volume = {62},
pages = {372--378}
}
|
|||||
| Borchers, D. L. | 1999 | Composite mark-recapture line transect surveys [BibTeX] |
Marine Mammal Survey and Assessment Methods :115--126 | ||
BibTeX:
@incollection{Bor99,
author = {Borchers, D. L.},
title = {Composite mark-recapture line transect surveys},
booktitle = {Marine Mammal Survey and Assessment Methods},
publisher = {Balkema},
year = {1999},
pages = {115--126}
}
|
|||||
| Borchers, D. L. | 1996 | Line transect estimation with uncertain detection on the trackline [BibTeX] |
: | ||
BibTeX:
@phdthesis{Borchers96,
author = {Borchers, D. L.},
title = {Line transect estimation with uncertain detection on the trackline},
school = {University of Cape Town},
year = {1996}
}
|
|||||
| Borchers, D. L. | 1994 | Methods of estimating mean school size from IWC sightings survey data [BibTeX] |
Report of the International Whaling Commission 44:429--437 | ||
BibTeX:
@article{Bor94,
author = {Borchers, D. L.},
title = {Methods of estimating mean school size from {IWC} sightings survey data},
journal = {Report of the International Whaling Commission},
year = {1994},
volume = {44},
pages = {429--437}
}
|
|||||
| Borchers, D. L., Buckland, S. T., Goedhart, P. W., Clarke, E. D. & Hedley, S. L. | 1998 | Horvitz-Thompson estimators for double-platform line transect surveys [BibTeX] |
Biometrics 54:1221--1237 | ||
BibTeX:
@article{BOR98,
author = {Borchers, D. L. and Buckland, S. T. and Goedhart, P. W. and Clarke, E. D. and Hedley,S. L.},
title = {Horvitz-{T}hompson estimators for double-platform line transect surveys},
journal = {Biometrics},
year = {1998},
volume = {54},
pages = {1221--1237}
}
|
|||||
| Borchers, D. L., Buckland, S. T. & Zucchini, W. | 2002 | Estimating Animal Abundance [BibTeX] |
: | ||
BibTeX:
@book{BOR02,
author = {Borchers, D. L. and Buckland, S. T. and Zucchini, W.},
title = {Estimating Animal Abundance},
publisher = {Springer},
year = {2002}
}
|
|||||
| Borchers, D. L. & Burnham, K. P. | 2004 | General formulation for distance sampling [BibTeX] |
Advanced Distance Sampling :307-392 | ||
BibTeX:
@incollection{Burnham2004a,
author = {Borchers, D. L. and Burnham, K. P.},
title = {General formulation for distance sampling},
booktitle = {Advanced Distance Sampling},
publisher = {Oxford University Press},
year = {2004},
pages = {307-392}
}
|
|||||
| Borchers, D. L. & Burt, M. L. | 2002 | Generalized regression methods for estimating school size from line transect data [BibTeX] |
: | ||
BibTeX:
@techreport{BorBur02,
author = {Borchers, D. L. and Burt, M. L.},
title = {Generalized regression methods for estimating school size from line transect data},
year = {2002},
number = {Paper SC/54/IA23}
}
|
|||||
| Borchers, D. L., Marques, T. A., Gunnlaugsson, T. & Jupp, P. E. | 2010 | Estimating distance sampling detection functions when distances are measured with errors [BibTeX] |
Journal of Agricultural, Biological, and Environmental Statistics 15:346-361 | DOI | |
BibTeX:
@article{Borchers2010,
author = {D. L. Borchers and T. A. Marques and Th. Gunnlaugsson and P. E. Jupp},
title = {Estimating distance sampling detection functions when distances are measured with errors},
journal = {Journal of Agricultural, Biological, and Environmental Statistics},
year = {2010},
volume = {15},
pages = {346-361},
doi = {10.1007/s13253-010-0021-y}
}
|
|||||
| Borchers, D. L., Pike, D., Gunnlaugsson, T. & Vikingsson, G. A. | 2009 | Minke whale abundance estimation from the NASS 1987 and 2001 aerial cue–counting surveys taking appropriate account of distance estimation errors [BibTeX] |
NAMMCO Scientific Publications 7:95--110 | ||
BibTeX:
@article{BorSub1,
author = {Borchers, D. L. and Pike, D. and Gunnlaugsson, T. and Vikingsson, G. A.},
title = {Minke whale abundance estimation from the {NASS} 1987 and 2001 aerial cue–counting surveys taking appropriate account of distance estimation errors},
journal = {NAMMCO Scientific Publications},
year = {2009},
volume = {7},
pages = {95--110}
}
|
|||||
| Borchers, D. L., Zucchini, W. & Fewster, R. | 1998 | Mark-recapture models for line transect surveys [BibTeX] |
Biometrics 54:1207--1220 | ||
BibTeX:
@article{BOR98b,
author = {Borchers, D. L. and Zucchini, W. and Fewster,R.},
title = {Mark-recapture models for line transect surveys},
journal = {Biometrics},
year = {1998},
volume = {54},
pages = {1207--1220}
}
|
|||||
| Borkin, K. M., Summers, R. W. & Thomas, L. | 2012 | Surveying abundance and stand type associations of Formica aquilonia and F. lugubris (Hymenoptera: Formicidae) nest mounds over an extensive area: Trialing a novel method [BibTeX] |
European Journal of Entomology : | ||
BibTeX:
@article{Borkin2012,
author = {Kerry M. Borkin and Ron W. Summers and Len Thomas},
title = {Surveying abundance and stand type associations of Formica aquilonia and F. lugubris (Hymenoptera: Formicidae) nest mounds over an extensive area: Trialing a novel method},
journal = {European Journal of Entomology},
year = {2012}
}
|
|||||
| Borralho, R., Rego, F. & Pinto, P. V. | 1996 | Is driven transect sampling suitable for estimating red-legged partridge Alectoris rufa densities? [BibTeX] |
Wildlife Biology 2:259--268 | ||
BibTeX:
@article{BOR96,
author = {Borralho, R. and Rego, F. and Pinto, P. V.},
title = {Is driven transect sampling suitable for estimating red-legged partridge \textit{Alectoris rufa} densities?},
journal = {Wildlife Biology},
year = {1996},
volume = {2},
pages = {259--268}
}
|
|||||
| Bottenberg, H., Litsinger, J. A. & Kenmore, P. E. | 1992 | A line transect survey method for rice tungro virus [BibTeX] |
Proceedings, Third International Conference on Plant Protection in the Tropics, Volume V : | ||
BibTeX:
@incollection{Botetal92,
author = {Bottenberg, H. and Litsinger, J. A. and Kenmore, P. E.},
title = {A line transect survey method for rice tungro virus},
booktitle = {Proceedings, Third International Conference on Plant Protection in the Tropics, Volume V},
year = {1992}
}
|
|||||
| Bovendorp, R. S. & Galetti, M. | 2007 | Density and population size of mammals introduced on a land-bridge island in southeastern Brazil [BibTeX] |
Biological Invasions 9:353-357 | URL | |
BibTeX:
@article{springerlink:10.1007/s10530-006-9031-7,
author = {Bovendorp, Ricardo Siqueira and Galetti, Mauro},
title = {Density and population size of mammals introduced on a land-bridge island in southeastern Brazil},
journal = {Biological Invasions},
publisher = {Springer Netherlands},
year = {2007},
volume = {9},
pages = {353-357},
note = {10.1007/s10530-006-9031-7},
url = {http://dx.doi.org/10.1007/s10530-006-9031-7}
}
|
|||||
| Bowden, D., White, G., Franklin, A. & Ganey, J. | 2003 | Estimating population size with correlated sampling unit estimates | Journal of Wildlife Management 67:1--10 | ||
| Abstract: Finite population sampling theory is useful in estimating total population size (abundance) from abundance estimates of each sampled unit (quadrat). We develop estimators that allow correlated quadrat abundance estimates, even for quadrats in different sampling strata. Correlated quadrat abundance estimates based on mark-recapture or distance sampling methods occur when data are pooled across quadrats to estimate, for example, capture probability parameters or sighting functions. When only minimal information is available from each quadrat, pooling of data across quadrats may be necessary to efficiently estimate capture probabilities or sighting functions. We further include information from a quadrat-based auxiliary variable to more precisely estimate total population size via a ratio estimator. We also provide variance estimators for the difference between or the ratio of 2 abundance estimates, taken at different times. We present an example based on estimating the number of Mexican spotted owls (Strix occidentalis lucida) in the Upper Gila Mountains Recovery Unit, Arizona and New Mexico, USA. Owl abundance for each quadrat was estimated with a Huggins 4-pass mark-resight population estimator, but with initial capture and resighting probabilities modeled in common across all sample quadrats. Pooling mark-resight data across quadrats was necessary because few owls were marked on individual quadrats to estimate quadrat-specific capture probabilities. Model-based estimates of owl abundance for each quadrat necessitated variance estimation procedures that take into account correlated quadrat estimates. An auxiliary variable relating to topographic roughness of sampled quadrats provided a useful covariate for a ratio estimator. | |||||
BibTeX:
@article{Bowden2003,
author = {Bowden, D.C. and White, G.C. and Franklin, A.B. and Ganey, J.L.},
title = {Estimating population size with correlated sampling unit estimates},
journal = {Journal of Wildlife Management},
year = {2003},
volume = {67},
number = {1},
pages = {1--10}
}
|
|||||
| Bozec, Y.-M., Kulbicki, M., Laloë, F., Mou-Tham, G. & Gascuel, D. | 2011 | Factors affecting the detection distances of reef fish: implications for visual counts [BibTeX] |
Marine Biology 158:969-981 | URL | |
BibTeX:
@article{springerlink:10.1007/s00227-011-1623-9,
author = {Bozec, Yves-Marie and Kulbicki, Michel and Laloë, Francis and Mou-Tham, Gérard and Gascuel, Didier},
title = {Factors affecting the detection distances of reef fish: implications for visual counts},
journal = {Marine Biology},
publisher = {Springer Berlin / Heidelberg},
year = {2011},
volume = {158},
pages = {969-981},
note = {10.1007/s00227-011-1623-9},
url = {http://dx.doi.org/10.1007/s00227-011-1623-9}
}
|
|||||
| Branch, T. | Humpback whale abundance south of 60S from three complete circumpolar sets of surveys [BibTeX] |
Submitted to the Journal of Cetacean Research and Management (Special Issue) : | |||
BibTeX:
@article{Branch,
author = {T.A. Branch},
title = {Humpback whale abundance south of 60S from three complete circumpolar sets of surveys},
journal = {Submitted to the Journal of Cetacean Research and Management (Special Issue)}
}
|
|||||
| Brandt, C. A. & Rickard, W. H. | 1992 | Effects of survey frequency on bird density estimates in the shrub-steppe environment [BibTeX] |
Northwest Science 66:172--182 | ||
BibTeX:
@article{BraRic92,
author = {Brandt, C. A. and Rickard, W. H.},
title = {Effects of survey frequency on bird density estimates in the shrub-steppe environment},
journal = {Northwest Science},
year = {1992},
volume = {66},
pages = {172--182}
}
|
|||||
| Breiwick, J. M., Rugh, D. J., Withrow, D. E., Dahlheim, M. E. & Buckland, S. T. | 1988 | Preliminary population estimate of gray whales during the 1987/88 southward migration [BibTeX] |
: | ||
BibTeX:
@techreport{Breetal88,
author = {Breiwick, J. M. and Rugh, D. J. and Withrow, D. E. and Dahlheim, M. E. and Buckland, S. T.},
title = {Preliminary population estimate of gray whales during the 1987/88 southward migration},
year = {1988},
number = {Paper SC/40/PS12}
}
|
|||||
| Brennan, L. A. & Block, W. M. | 1986 | Line transect estimates of mountain quail density [BibTeX] |
Journal of Wildlife Management 50:373--377 | ||
BibTeX:
@article{BreBlo86,
author = {Brennan, L. A. and Block, W. M.},
title = {Line transect estimates of mountain quail density},
journal = {Journal of Wildlife Management},
year = {1986},
volume = {50},
pages = {373--377}
}
|
|||||
| Brewster, J. P. & Simons, T. R. | 2009 | Testing the importance of auditory detections in avian point counts [BibTeX] |
Journal of Field Ornithology 80:178--182 | DOI | |
BibTeX:
@article{Brewster2009,
author = {Brewster, Jerome P. and Simons, Theodore R.},
title = {Testing the importance of auditory detections in avian point counts},
journal = {Journal of Field Ornithology},
year = {2009},
volume = {80},
pages = {178--182},
doi = {10.1111/j.1557-9263.2009.00220.x}
}
|
|||||
| Briggs, K. T., Tyler, W. B. & Lewis, D. B. | 1985 | Aerial surveys for seabirds: methodological experiments [BibTeX] |
Journal of Wildlife Management 49:412--417 | ||
BibTeX:
@article{Brietal85,
author = {Briggs, K. T. and Tyler, W. B. and Lewis, D. B.},
title = {Aerial surveys for seabirds: methodological experiments},
journal = {Journal of Wildlife Management},
year = {1985},
volume = {49},
pages = {412--417}
}
|
|||||
| Brockelman, W. Y. | 1980 | The use of the line transect sampling method for forest primates [BibTeX] |
Tropical Ecology and Development :367--371 | ||
BibTeX:
@incollection{Bro80,
author = {Brockelman, W. Y.},
title = {The use of the line transect sampling method for forest primates},
booktitle = {Tropical Ecology and Development},
publisher = {The International Society of Tropical Ecology},
year = {1980},
pages = {367--371}
}
|
|||||
| Broome, L. S., Bishop, K. D. & Anderson, D. R. | 1984 | Population density and habitat use by Megapodius freyinet eremita in West New Britain [BibTeX] |
Australian Wildlife Research 11:161--171 | ||
BibTeX:
@article{Broetal84,
author = {Broome, L. S. and Bishop, K. D. and Anderson, D. R.},
title = {Population density and habitat use by \textit{Megapodius freyinet eremita} in {W}est {N}ew {B}ritain},
journal = {Australian Wildlife Research},
year = {1984},
volume = {11},
pages = {161--171}
}
|
|||||
| Brown, B. M. & Cowling, A. | 1998 | Clustering and abundance estimation for Neyman-Scott models and line transect surveys | Biometrika 85:427--438 | ||
| Abstract: This paper considers the estimation of clustering parameters and mean species intensity based on likelihood theory for the simplified Neyman-Scott Poisson model, with observations taken from line transect surveys with a Gaussian detection function. The estimators and accompanying standard error expressions are tractable and easy to calculate, and, coming from likelihood methods, often will have high efficiency. Such properties compare favourably with those of existing K-function methods which however are semiparametric in nature and less reliant on specific parametric assumptions. The likelihood analysis reveals auxiliary information which could be used to check the form of the detection function. | |||||
BibTeX:
@article{BroCow98,
author = {Brown, B. M. and Cowling, A.},
title = {Clustering and abundance estimation for {N}eyman-{S}cott models and line transect surveys},
journal = {Biometrika},
year = {1998},
volume = {85},
pages = {427--438}
}
|
|||||
| Brown, J. A. & Boyce, M. S. | 1998 | Line transect sampling of Karner blue butterflies (Lycaeides melissa samuelis) | Environmental and Ecological Statistics 5:81-91 | ||
| Abstract: Line transect sampling is an effective survey method for estimating butterfly densities because it provides unbiased estimates of site-density (provided key assumptions are met), and estimates are comparable among sites. For monitoring Karner blue butterflies in Wisconsin, USA, comparable estimates are required because each year a different selection of sites will be monitored. Annual state-wide indices of species abundance can be derived from the site-surveys and compared to previous year's indices to monitor trends. We advocate that line transect sampling is preferable to Pollard-Yates transects as a survey technique for monitoring Karner blue butterflies. The Pollard-Yates surveys do not adjust for differences in site detectability. As a consequence, estimates of among-site from Pollard-Yates surveys can be biased. © 1998 Chapman & Hall. | |||||
BibTeX:
@article{Broboy98,
author = {Brown, J. A. and Boyce, M. S.},
title = {Line transect sampling of {K}arner blue butterflies (\emph{{L}ycaeides melissa samuelis})},
journal = {Environmental and Ecological Statistics},
year = {1998},
volume = {5},
pages = {81-91},
note = {ID263}
}
|
|||||
| Brunk, H. D. | 1978 | Univariate density estimation by orthogonal series [BibTeX] |
Biometrika 65:521--528 | ||
BibTeX:
@article{Bru78,
author = {Brunk, H. D.},
title = {Univariate density estimation by orthogonal series},
journal = {Biometrika},
year = {1978},
volume = {65},
pages = {521--528}
}
|
|||||
| Buchanan, G., Pearce-Higgins, J. & Grant, M. | 2006 | Observer variation in estimates of Meadow Pipit Anthus pratensis and Skylark Alauda arvensis abundance on moorland | Bird Study 53:92--95 | ||
| Abstract: Capsule Counts least susceptible to observer effects were those within 25 m of a transect and the total number along a transect, with observer effects greater for distance sampling. © 2006 British Trust for Ornithology. | |||||
BibTeX:
@article{Buchanan2006,
author = {Buchanan, G.M. and Pearce-Higgins, J.W. and Grant, M.C.},
title = {Observer variation in estimates of Meadow Pipit \textit{Anthus pratensis} and Skylark \textit{Alauda arvensis} abundance on moorland},
journal = {Bird Study},
year = {2006},
volume = {53},
number = {1},
pages = {92--95}
}
|
|||||
| Buckland, S., Plumptre, A., Thomas, L. & Rexstad, E. | 2010 | Line Transect Sampling of Primates: Can Animal-to-Observer Distance Methods Work? [BibTeX] |
International Journal of Primatology 31:485-499 | URL | |
BibTeX:
@article{springerlink:10.1007/s10764-010-9408-4,
author = {Buckland, Stephen and Plumptre, Andrew and Thomas, Len and Rexstad, Eric},
title = {Line Transect Sampling of Primates: Can Animal-to-Observer Distance Methods Work?},
journal = {International Journal of Primatology},
publisher = {Springer Netherlands},
year = {2010},
volume = {31},
pages = {485-499},
note = {10.1007/s10764-010-9408-4},
url = {http://dx.doi.org/10.1007/s10764-010-9408-4}
}
|
|||||
| Buckland, S., Plumptre, A., Thomas, L. & Rexstad, E. | 2010 | Design and Analysis of Line Transect Surveys for Primates [BibTeX] |
International Journal of Primatology 31:833-847 | URL | |
BibTeX:
@article{springerlink:10.1007/s10764-010-9431-5,
author = {Buckland, Stephen and Plumptre, Andrew and Thomas, Len and Rexstad, Eric},
title = {Design and Analysis of Line Transect Surveys for Primates},
journal = {International Journal of Primatology},
publisher = {Springer Netherlands},
year = {2010},
volume = {31},
pages = {833-847},
note = {10.1007/s10764-010-9431-5},
url = {http://dx.doi.org/10.1007/s10764-010-9431-5}
}
|
|||||
| Buckland, S. T. | 2006 | Point transect surveys for songbirds: robust methodologies [BibTeX] |
The Auk 123:345--345 | ||
BibTeX:
@article{Buckland2006,
author = {Buckland, S. T.},
title = {Point transect surveys for songbirds: robust methodologies},
journal = {The Auk},
year = {2006},
volume = {123},
number = {2},
pages = {345--345}
}
|
|||||
| Buckland, S. T. | 1992 | Fitting density functions with polynomials [BibTeX] |
Applied Statistics 41:63--76 | ||
BibTeX:
@article{BUC92a,
author = {Buckland, S. T.},
title = {Fitting density functions with polynomials},
journal = {Applied Statistics},
year = {1992},
volume = {41},
pages = {63--76}
}
|
|||||
| Buckland, S. T. | 1992 | Maximum likelihood fitting of Hermite and simple polynomial densities [BibTeX] |
Applied Statistics 41:241--266 | ||
BibTeX:
@article{Buc92b,
author = {Buckland, S. T.},
title = {Maximum likelihood fitting of {H}ermite and simple polynomial densities},
journal = {Applied Statistics},
year = {1992},
volume = {41},
pages = {241--266}
}
|
|||||
| Buckland, S. T. | 1992 | Effects of heterogeneity on estimation of probability of detection on the trackline [BibTeX] |
Report of the International Whaling Commission 42:569--573 | ||
BibTeX:
@article{Buc92c,
author = {Buckland, S. T.},
title = {Effects of heterogeneity on estimation of probability of detection on the trackline},
journal = {Report of the International Whaling Commission},
year = {1992},
volume = {42},
pages = {569--573}
}
|
|||||
| Buckland, S. T. | 1987 | On the variable circular plot method of estimating animal density [BibTeX] |
Biometrics 43:363--384 | ||
BibTeX:
@article{Buc87a,
author = {Buckland, S. T.},
title = {On the variable circular plot method of estimating animal density},
journal = {Biometrics},
year = {1987},
volume = {43},
pages = {363--384}
}
|
|||||
| Buckland, S. T. | 1987 | An assessment of the performance of line transect models for fitting IWC/IDCR cruise data, 1978/79 to 1984/85 [BibTeX] |
Report of the International Whaling Commission 37:277--279 | ||
BibTeX:
@article{Buc87b,
author = {Buckland, S. T.},
title = {An assessment of the performance of line transect models for fitting {IWC/IDCR} cruise data, 1978/79 to 1984/85},
journal = {Report of the International Whaling Commission},
year = {1987},
volume = {37},
pages = {277--279}
}
|
|||||
| Buckland, S. T. | 1987 | Estimation of minke whale numbers from the 1984/85 IWC/IDCR Antarctic sightings data [BibTeX] |
Report of the International Whaling Commission 37:263--288 | ||
BibTeX:
@article{Buc87c,
author = {Buckland, S. T.},
title = {Estimation of minke whale numbers from the 1984/85 {IWC/IDCR A}ntarctic sightings data},
journal = {Report of the International Whaling Commission},
year = {1987},
volume = {37},
pages = {263--288}
}
|
|||||
| Buckland, S. T. | 1985 | Perpendicular distance models for line transect sampling [BibTeX] |
Biometrics 41:177--195 | ||
BibTeX:
@article{Buc85,
author = {Buckland, S. T.},
title = {Perpendicular distance models for line transect sampling},
journal = {Biometrics},
year = {1985},
volume = {41},
pages = {177--195}
}
|
|||||
| Buckland, S. T. | 1984 | Monte Carlo confidence intervals [BibTeX] |
Biometrics 40:811--817 | ||
BibTeX:
@article{Buc84,
author = {Buckland, S. T.},
title = {Monte {C}arlo confidence intervals},
journal = {Biometrics},
year = {1984},
volume = {40},
pages = {811--817}
}
|
|||||
| Buckland, S. T. | 1982 | A note on the Fourier series model for analysing line transect data [BibTeX] |
Biometrics 38:469--477 | ||
BibTeX:
@article{Buc82,
author = {Buckland, S. T.},
title = {A note on the {F}ourier series model for analysing line transect data},
journal = {Biometrics},
year = {1982},
volume = {38},
pages = {469--477}
}
|
|||||
| Buckland, S. T. & Anderson, D. R. | 2004 | Introduction to advanced distance sampling [BibTeX] |
Advanced Distance Sampling :1-6 | ||
BibTeX:
@incollection{Buckland2004,
author = {Buckland, S. T. and Anderson, D. R.},
title = {Introduction to advanced distance sampling},
booktitle = {Advanced Distance Sampling},
publisher = {Oxford University Press},
year = {2004},
pages = {1-6}
}
|
|||||
| Buckland, S. T., Anderson, D. R., Burnham, K. P. & Laake, J. L. | 1993 | Distance Sampling - Estimating abundance of biological populations [BibTeX] |
: | ||
BibTeX:
@book{BUC93,
author = {Buckland, S. T. and Anderson, D. R. and Burnham, K. P. and Laake, J. L.},
title = {Distance Sampling - Estimating abundance of biological populations},
publisher = {Chapman and Hall},
year = {1993}
}
|
|||||
| Buckland, S. T., Anderson, D. R., Burnham, K. P., Laake, J. L., Borchers, D. & Thomas, L. | 2004 | Advanced Distance Sampling [BibTeX] |
: | ||
BibTeX:
@book{BUC04,
author = {Buckland, S. T. and Anderson, D. R. and Burnham, K. P. and Laake, J. L. and Borchers, D.L. and Thomas, L.},
title = {Advanced Distance Sampling},
publisher = {Oxford University Press},
year = {2004}
}
|
|||||
| Buckland, S. T., Anderson, D. R., Burnham, K. P., Laake, J. L., Borchers, D. L. & Thomas, L. | 2001 | Introduction to distance sampling - Estimating abundance of biological populations [BibTeX] |
: | ||
BibTeX:
@book{BUC01,
author = {Buckland, S. T. and Anderson, D. R. and Burnham, K. P. and Laake, J. L. and Borchers, D. L. and Thomas, L.},
title = {Introduction to distance sampling - Estimating abundance of biological populations},
publisher = {Oxford University Press},
year = {2001}
}
|
|||||
| Buckland, S. T. & Anganuzzi, A. A. | 1988 | Comparison of smearing methods in the analysis of minke sightings data from IWC/IDCR Antarctic cruises [BibTeX] |
Report of the International Whaling Commission 38:257--263 | ||
BibTeX:
@article{BucAng88a,
author = {Buckland, S. T. and Anganuzzi, A. A.},
title = {Comparison of smearing methods in the analysis of minke sightings data from {IWC/IDCR A}ntarctic cruises},
journal = {Report of the International Whaling Commission},
year = {1988},
volume = {38},
pages = {257--263}
}
|
|||||
| Buckland, S. T. & Anganuzzi, A. A. | 1988 | Estimated trends in abundance of dolphins associated with tuna in the eastern tropical Pacific [BibTeX] |
Report of the International Whaling Commission 38:411--437 | ||
BibTeX:
@article{BucAng88b,
author = {Buckland, S. T. and Anganuzzi, A. A.},
title = {Estimated trends in abundance of dolphins associated with tuna in the eastern tropical {P}acific},
journal = {Report of the International Whaling Commission},
year = {1988},
volume = {38},
pages = {411--437}
}
|
|||||
| Buckland, S. T., Bloch, D., Cattanach, K. L., Gunnlaugsson, T., Hoydal, K., Lens, S. & Sigurjónsson, J. | 1993 | Distribution and abundance of long-finned pilot whales in the North Atlantic, estimated from NASS-87 and NASS-89 data [BibTeX] |
Biology of Northern Hemisphere Pilot Whales :33--49 | ||
BibTeX:
@incollection{Bucetal93b,
author = {Buckland, S. T. and Bloch, D. and Cattanach, K. L. and Gunnlaugsson, Th. and Hoydal, K. and Lens, S. and Sigurj\'onsson,J.},
title = {Distribution and abundance of long-finned pilot whales in the {N}orth {A}tlantic, estimated from {NASS}-87 and {NASS}-89 data},
booktitle = {Biology of Northern Hemisphere Pilot Whales},
publisher = {International Whaling Commission},
year = {1993},
pages = {33--49}
}
|
|||||
| Buckland, S. T., Borchers, D. L., Johnston, A., Henrys, P. A. & Marques, T. A. | 2007 | Line transect methods for plant surveys [BibTeX] |
Biometrics 63:989--998 | ||
| Review: Tenho IMPRESSO | |||||
BibTeX:
@article{Bucetal07,
author = {Buckland, S. T. and Borchers, D. L. and Johnston, A. and Henrys, P. A. and Marques, T. A.},
title = {Line transect methods for plant surveys},
journal = {Biometrics},
year = {2007},
volume = {63},
pages = {989--998}
}
|
|||||
| Buckland, S. T. & Breiwick, J. M. | 2002 | Estimated trends in abundance of eastern Pacific gray whales from shore counts, 1967/68 to 1995/96 [BibTeX] |
Journal of Cetacean Research and Management 4:41--48 | ||
BibTeX:
@article{BucBre02,
author = {Buckland, S. T. and Breiwick, J. M.},
title = {Estimated trends in abundance of eastern Pacific gray whales from shore counts, 1967/68 to 1995/96},
journal = {Journal of Cetacean Research and Management},
year = {2002},
volume = {4},
pages = {41--48}
}
|
|||||
| Buckland, S. T., Breiwick, J. M., Cattanach, K. L. & Laake, J. L. | 1993 | Estimated population size of the California gray whale [BibTeX] |
Marine Mammal Science 9:235--249 | ||
BibTeX:
@article{Bucetal93c,
author = {Buckland, S. T. and Breiwick, J. M. and Cattanach, K. L. and Laake, J. L.},
title = {Estimated population size of the {C}alifornia gray whale},
journal = {Marine Mammal Science},
year = {1993},
volume = {9},
pages = {235--249}
}
|
|||||
| Buckland, S. T., Burnham, K. P. & Augustin, N. H. | 1997 | Model selection: an integral part of inference [BibTeX] |
Biometrics 53:603--618 | ||
BibTeX:
@article{Bucetal97,
author = {Buckland, S. T. and Burnham, K. P. and Augustin, N. H.},
title = {Model selection: an integral part of inference},
journal = {Biometrics},
year = {1997},
volume = {53},
pages = {603--618}
}
|
|||||
| Buckland, S. T., Cattanach, K. L. & Anganuzzi, A. A. | 1992 | Estimating trends in abundance of dolphins associated with tuna in the eastern tropical Pacific Ocean, using sightings data collected on commercial tuna vessels [BibTeX] |
Fishery Bulletin 90:1--12 | ||
BibTeX:
@article{Bucetal92e,
author = {Buckland, S. T. and Cattanach, K. L. and Anganuzzi, A. A.},
title = {Estimating trends in abundance of dolphins associated with tuna in the eastern tropical Pacific Ocean, using sightings data collected on commercial tuna vessels},
journal = {Fishery Bulletin},
year = {1992},
volume = {90},
pages = {1--12}
}
|
|||||
| Buckland, S. T., Cattanach, K. L. & Gunnlaugsson, T. | 1992 | Fin whale abundance in the North Atlantic, estimated from Icelandic and Faroese NASS-87 and NASS-89 data [BibTeX] |
Report of the International Whaling Commission 42:645--651 | ||
BibTeX:
@article{Bucetal92d,
author = {Buckland, S. T. and Cattanach, K. L. and Gunnlaugsson, Th.},
title = {Fin whale abundance in the {N}orth {A}tlantic, estimated from {I}celandic and {F}aroese {NASS}-87 and {NASS}-89 data},
journal = {Report of the International Whaling Commission},
year = {1992},
volume = {42},
pages = {645--651}
}
|
|||||
| Buckland, S. T. & Garthwaite, P. H. | 1990 | Estimating confidence intervals by the Robbins--Monro search process [BibTeX] |
Applied Statistics 39:413--424 | ||
BibTeX:
@article{BucGar90,
author = {Buckland, S. T. and Garthwaite, P. H.},
title = {Estimating confidence intervals by the {R}obbins--{M}onro search process},
journal = {Applied Statistics},
year = {1990},
volume = {39},
pages = {413--424}
}
|
|||||
| Buckland, S. T., Goudie, I. B. J. & Borchers, D. L. | 2000 | Wildlife population assessment: past developments and future directions [BibTeX] |
Biometrics 56:1--12 | ||
BibTeX:
@article{Bucetal00,
author = {Buckland, S. T. and Goudie, I. B. J. and Borchers, D. L.},
title = {Wildlife population assessment: past developments and future directions},
journal = {Biometrics},
year = {2000},
volume = {56},
pages = {1--12}
}
|
|||||
| Buckland, S. T., Laake, J. L. & Borchers, D. L. | 2010 | Double-Observer Line Transect Methods: Levels of Independence [BibTeX] |
Biometrics 66:169--177 | DOI | |
BibTeX:
@article{Buckland2010,
author = {Stephen T. Buckland and Jeffrey L. Laake and David L. Borchers},
title = {Double-Observer Line Transect Methods: Levels of Independence},
journal = {Biometrics},
year = {2010},
volume = {66},
pages = {169--177},
doi = {10.1111/j.1541-0420.2009.01239.x}
}
|
|||||
| Buckland, S. T., Marsden, S. J. & Green, R. E. | 2008 | Estimating bird abundance: making methods work [BibTeX] |
Bird Conservation International 18:S91–S108 | ||
BibTeX:
@article{Buckland2008,
author = {Stephen T. Buckland and Stuart J. Marsden and Rhys E. Green},
title = {Estimating bird abundance: making methods work},
journal = {Bird Conservation International},
year = {2008},
volume = {18},
pages = {S91–S108}
}
|
|||||
| Buckland, S. T., Russell, R. E., Dickson, B. G., Saab, V. A., Gorman, D. N. & Block, W. M. | 2009 | Analysing designed experiments in distance sampling [BibTeX] |
Journal of Agricultural, Biological, and Environmental Statistics 14:432--442 | ||
BibTeX:
@article{Buckland2009a,
author = {Stephen T. Buckland and Robin E. Russell and Brett G. Dickson and Victoria A. Saab and Donal N. Gorman and William M. Block},
title = {Analysing designed experiments in distance sampling},
journal = {Journal of Agricultural, Biological, and Environmental Statistics},
year = {2009},
volume = {14},
pages = {432--442}
}
|
|||||
| Buckland, S. T., Summers, R. W., Borchers, D. L. & Thomas, L. | 2006 | Point transect sampling with traps or lures | Journal of Applied Ecology 43:377--384 | ||
| Abstract: 1. The ability to monitor abundance of animal populations is becoming increasingly important, in light of growing concerns over the loss of biodiversity through anthropogenic changes. A widely used tool for such monitoring is distance sampling, in which distances of detected animals from a line or point are modelled, to estimate detectability and hence abundance. Nevertheless, many species still prove problematic to survey. We have developed two extensions to point transect sampling that potentially allow abundance to be estimated for a number of species from diverse taxa for which good survey methods have not previously been available. 2. For each method, the primary survey comprises a random sample of points, or more usually a systematic grid of points, through the region of interest. Animals are lured to a point, or trapped at a point, and the number of animals observed at each point is recorded. A separate study is conducted on a subset of animals, to record whether they respond to the lure or enter the trap, for a range of known distances from the point. These data are used to estimate the probability that an animal will respond to the lure or enter the trap, as a function of its initial distance from the point. This allows the counts to be converted to an estimate of abundance in the survey region. 3. We illustrated the methods using a lure survey of crossbills Loxia spp. in coniferous woodland in Scotland. 4. Synthesis and applications. Two extensions of point transect sampling that use the same statistical methodology, lure point transects and trapping point transects, have been developed. Lure point transects extend the applicability of distance sampling to species that can be lured to a point, while trapping point transects potentially allow abundance estimation of species that can be trapped, with fewer resources needed than trapping webs and conventional mark-recapture methods. © 2006 British Ecological Society. | |||||
BibTeX:
@article{Buckland2006b,
author = {Buckland, S. T. and Summers, R. W. and Borchers, D. L. and Thomas, L.},
title = {Point transect sampling with traps or lures},
journal = {Journal of Applied Ecology},
year = {2006},
volume = {43},
number = {2},
pages = {377--384}
}
|
|||||
| Buckland, S. T., Thomas, L., Marques, F. F. C., Strindberg, S., Hedley, S. L., Pollard, J. H., Borchers, D. L. & Burt, M. L. | 2002 | Distance sampling: recent advances and future directions [BibTeX] |
Quantitative Methods for Current Environmental Issues :79--97 | ||
BibTeX:
@incollection{Bucetal02,
author = {Buckland, S. T. and Thomas, L. and Marques, F. F. C. and Strindberg, S. and Hedley, S. L. and Pollard, J. H. and Borchers, D. L. and Burt, M. L.},
title = {Distance sampling: recent advances and future directions},
booktitle = {Quantitative Methods for Current Environmental Issues},
publisher = {Springer Verlag},
year = {2002},
pages = {79--97}
}
|
|||||
| Buckland, S. T. & Turnock, B. J. | 1992 | A robust line transect method [BibTeX] |
Biometrics 48:901--909 | ||
BibTeX:
@article{BucTur92,
author = {Buckland, S. T. and Turnock, B. J.},
title = {A robust line transect method},
journal = {Biometrics},
year = {1992},
volume = {48},
pages = {901--909}
}
|
|||||
| Buford, E., Capen, D. & Williams, B. | 1996 | Distance sampling to estimate fledgling brood density of forest birds | Canadian Field-Naturalist 110:642--648 | ||
| Abstract: Research on the status of avian communities often relies on estimates of abundance, but does not always consider demographic factors such as productivity. We introduce the application of a distance-sampling technique for estimating brood density of fledgling birds in forested habitats. During 1993 and 1994, we conducted 60 line-transect surveys on 10 sites in the Green Mountain National Forest in Vermont. Sites were divided into two groups, which allowed us to test for differences in fledgling density between groups. We detected 508 broods representing 38 species. Using standard distance-sampling procedures, we estimated densities of 0.576 (C.V.= 11.89) and 0.513 (C.V.=12.54) broods per hectare. Density was not statistically different between groups. As with other survey methods, distance sampling favors easily detected species; however, line-transect density of fledglings is less obtrusive and less labor-intesive than mist-netting or nest searches, and can contribute important information to studies of avian communities. | |||||
BibTeX:
@article{Buford1996,
author = {Buford, E.W. and Capen, D.E. and Williams, B.K.},
title = {Distance sampling to estimate fledgling brood density of forest birds},
journal = {Canadian Field-Naturalist},
year = {1996},
volume = {110},
number = {4},
pages = {642--648}
}
|
|||||
| Buford, E. W. & Capen, D. E. | 1999 | Abundance and productivity of forest songbirds in a managed, unfragmented landscape in Vermont | Journal of Wildlife Management 63:180--188 | ||
| Abstract: Effective conservation of forest songbirds requires knowledge of responses to landscape pattern. We studied a breeding songbird community in a landscape characterized by scattered openings in a forest matrix in Vermont, 1993-94. We measured species composition, abundance, and fledgling brood density in the forested areas of 10500-ha sites; we compared a group of 5 disturbed-canopy sites (?10% canopy disturbance) with a control group of 5 undisturbed-canopy sites. We conducted 456 point counts to determine species composition and abundance, and we conducted 60 line transect surveys to estimate fledgling brood density as a measure of productivity. Adult densities were not different between groups (P > 0.05) for 18 species listed as priority for conservation, although power was low. Combined brood densities of all species, Neotropical migrants, and ground nesters were not different among groups (P > 0.05). Brood densities of 3 Neotropical migrants also were not different (P > 0.05). However, combined brood density of area-sensitive, forest interior species was greater on control sites (P < 0.05). At the scale of this study, a minimal amount of canopy removal in the extensively forested landscape did not affect abundance and overall productivity of songbirds inhabiting the remaining forest, but canopy removal had begun to suppress productivity of some forest interior species. | |||||
BibTeX:
@article{Buford1999,
author = {Buford, E. W. and Capen, D. E.},
title = {Abundance and productivity of forest songbirds in a managed, unfragmented landscape in Vermont},
journal = {Journal of Wildlife Management},
year = {1999},
volume = {63},
number = {1},
pages = {180--188}
}
|
|||||
| Burdick, D. L. | 1979 | On estimation of the number of porpoise schools [BibTeX] |
: | ||
BibTeX:
@techreport{Burd79,
author = {Burdick, D. L.},
title = {On estimation of the number of porpoise schools},
year = {1979},
number = {Publication 79--2}
}
|
|||||
| Burnham, K. P. | 1981 | Summarizing remarks: environmental influences [BibTeX] |
Estimating Numbers of Terrestrial Birds. Studies in Avian Biology No. 6 :324--325 | ||
BibTeX:
@incollection{Bur81,
author = {Burnham, K. P.},
title = {Summarizing remarks: environmental influences},
booktitle = {Estimating Numbers of Terrestrial Birds. Studies in Avian Biology No. 6},
publisher = {Cooper Ornithological Society},
year = {1981},
pages = {324--325}
}
|
|||||
| Burnham, K. P. | 1979 | A parametric generalization of the Hayne estimator for line transect sampling [BibTeX] |
Biometrics 35:587--595 | ||
BibTeX:
@article{Bur79,
author = {Burnham, K. P.},
title = {A parametric generalization of the {H}ayne estimator for line transect sampling},
journal = {Biometrics},
year = {1979},
volume = {35},
pages = {587--595}
}
|
|||||
| Burnham, K. P. & Anderson, D. R. | 2004 | Understanding AIC and BIC in Model Selection [BibTeX] |
Sociological Methods & Research 33:261-304 | ||
BibTeX:
@article{Burnham2004,
author = {Kenneth P. Burnham and David R. Anderson},
title = {Understanding {AIC and BIC} in Model Selection},
journal = {Sociological Methods \& Research},
year = {2004},
volume = {33},
pages = {261-304}
}
|
|||||
| Burnham, K. P. & Anderson, D. R. | 1984 | The need for distance data in transect counts [BibTeX] |
Journal of Wildlife Management 48:1248--1254 | ||
BibTeX:
@article{BurAnd84,
author = {Burnham, K. P. and Anderson, D. R.},
title = {The need for distance data in transect counts},
journal = {Journal of Wildlife Management},
year = {1984},
volume = {48},
pages = {1248--1254}
}
|
|||||
| Burnham, K. P. & Anderson, D. R. | 1976 | Mathematical models for non-parametric inferences from line transect data [BibTeX] |
Biometrics 32:325--336 | ||
BibTeX:
@article{BurAnd76,
author = {Burnham, K. P. and Anderson, D. R.},
title = {Mathematical models for non-parametric inferences from line transect data},
journal = {Biometrics},
year = {1976},
volume = {32},
pages = {325--336}
}
|
|||||
| Burnham, K. P., Anderson, D. R. & Laake, J. L. | 1981 | Line transect estimation of bird population density using a Fourier series [BibTeX] |
Estimating Numbers of Terrestrial Birds. Studies in Avian Biology No. 6 :466--482 | ||
BibTeX:
@incollection{Buretal81,
author = {Burnham, K. P. and Anderson, D. R. and Laake, J. L.},
title = {Line transect estimation of bird population density using a {F}ourier series},
booktitle = {Estimating Numbers of Terrestrial Birds. Studies in Avian Biology No. 6},
publisher = {Cooper Ornithological Society},
year = {1981},
pages = {466--482}
}
|
|||||
| Burnham, K. P., Anderson, D. R. & Laake, J. L. | 1985 | Efficiency and bias in strip and line transect sampling [BibTeX] |
Journal of Wildlife Management 49:1012--1018 | ||
BibTeX:
@article{Buretal85,
author = {Burnham, K. P., and Anderson, D. R. and Laake, J. L.},
title = {Efficiency and bias in strip and line transect sampling},
journal = {Journal of Wildlife Management},
year = {1985},
volume = {49},
pages = {1012--1018}
}
|
|||||
| Burnham, K. P., Anderson, D. R. & Laake, J. L. | 1980 | Estimation of density from line transect sampling of biological populations [BibTeX] |
Wildlife Monographs 72:1--202 | ||
BibTeX:
@article{BUR80,
author = {Burnham, K. P. and Anderson, D. R. and Laake, J. L.},
title = {Estimation of density from line transect sampling of biological populations},
journal = {Wildlife Monographs},
year = {1980},
volume = {72},
pages = {1--202}
}
|
|||||
| Burnham, K. P., Anderson, D. R. & Laake, J. L. | 1979 | Robust estimation from line transect data [BibTeX] |
Journal of Wildlife Management 43:992--996 | ||
BibTeX:
@article{Buretal79,
author = {Burnham, K. P., and Anderson, D. R. and Laake, J. L.},
title = {Robust estimation from line transect data},
journal = {Journal of Wildlife Management},
year = {1979},
volume = {43},
pages = {992--996}
}
|
|||||
| Burnham, K. P., Buckland, S. T., Laake, J. L., Borchers, D. L., Marques, T. A., Bishop, J. R. B. & Thomas, L. | 2004 | Further topics in distance sampling [BibTeX] |
Advanced Distance Sampling :307-392 | ||
BibTeX:
@incollection{BUR04,
author = {Burnham, K. P. and Buckland, S. T. and Laake, J. L. and Borchers, D. L. and Marques, T. A. and Bishop, J. R. B. and Thomas, L.},
title = {Further topics in distance sampling},
booktitle = {Advanced Distance Sampling},
publisher = {Oxford University Press},
year = {2004},
pages = {307-392}
}
|
|||||
| Butler, M., Wallace, M., Ballard, W., DeMaso, S. & Applegate, R. | 2005 | From the Field: The relationship of Rio Grande wild turkey distributions to roads [BibTeX] |
Wildlife Society Bulletin 33:745--748 | ||
BibTeX:
@article{Butler2005,
author = {Butler, M.J. and Wallace, M.C. and Ballard, W.B. and DeMaso, S.J. and Applegate, R.D.},
title = {{From the Field: The relationship of Rio Grande wild turkey distributions to roads}},
journal = {Wildlife Society Bulletin},
year = {2005},
volume = {33},
number = {2},
pages = {745--748}
}
|
|||||
| Butler, M. J., Ballard, W. B., Wallace, M. C. & Demaso, S. J. | 2007 | Road-Based Surveys for Estimating Wild Turkey Density in the Texas Rolling Plains | Journal of Wildlife Management 71:1646--1653 | URL PDF | |
| Abstract: Line-transect–based distance sampling has been used to estimate density of several wild bird species including wild turkeys (Meleagris gallopavo). We used inflatable turkey decoys during autumn (Aug–Nov) and winter (Dec–Mar) 2003–2005 at 3 study sites in the Texas Rolling Plains, USA, to simulate Rio Grande wild turkey (M. g. intermedia) flocks. We evaluated detectability of flocks using logistic regression models. Our modeling effort suggested that distance to a flock and flock size played important roles in flock detectability. We also conducted surveys from roads for wild turkeys during November 2004–January 2006. The detection probability of decoy flocks was similar to wild turkey flocks during winter (decoy flock, 69.3 ± 6.2% [ ± 95% CI]; wild turkey flock, 62.2 ± 18.3%) and autumn (decoy flock, 44.1 ± 5.1%; wild turkey flock, 44.7 ± 25.6%), which suggested that using decoys was appropriate for evaluating detectability of wild turkey flocks from roads. We conducted computer simulations to evaluate the performance of line-transect–based distance sampling and examined the power to detect trends in population change. Simulations suggested that population density may be underestimated by 12% during winter and 29% during autumn. Such bias occurred because of incomplete detectability of flocks near roads. Winter surveys tended to have less bias, lower relative variability, and greater power than did autumn surveys. During winter surveys, power was sufficient (≥0.80) to detect a 10–25% change in population density in 8–12 years using ≥100 16-km transects or ≥80 32-km transects. We concluded line-transect–based distance sampling from roads is an efficient, effective, and inexpensive technique for monitoring Rio Grande wild turkey populations across large scales. | |||||
BibTeX:
@article{BUTLER2007,
author = {Butler, Matthew J. and Ballard, Warren B. and Wallace, Mark C. and Demaso, Stephen J.},
title = {Road-Based Surveys for Estimating Wild Turkey Density in the Texas Rolling Plains},
journal = {Journal of Wildlife Management},
year = {2007},
volume = {71},
number = {5},
pages = {1646--1653
},
url = {http://dx.doi.org/10.2193%2F2006-270}
}
|
|||||
| Butterworth, D. S. | 1986 | A note on the analysis of the 1980/81 variable speed experiment [BibTeX] |
Report of the International Whaling Commission 36:485--489 | ||
BibTeX:
@article{But86,
author = {Butterworth, D. S.},
title = {A note on the analysis of the 1980/81 variable speed experiment},
journal = {Report of the International Whaling Commission},
year = {1986},
volume = {36},
pages = {485--489}
}
|
|||||
| Butterworth, D. S. | 1982 | A possible basis for choosing a functional form for the distribution of sightings with right angle distance: some preliminary ideas [BibTeX] |
Report of the International Whaling Commission 32:555--558 | ||
BibTeX:
@article{But82,
author = {Butterworth, D. S.},
title = {A possible basis for choosing a functional form for the distribution of sightings with right angle distance: some preliminary ideas},
journal = {Report of the International Whaling Commission},
year = {1982},
volume = {32},
pages = {555--558}
}
|
|||||
| Butterworth, D. S. | 1982 | On the functional form used for $g(y)$ for minke whale sightings, and bias in its estimation due to measurement inaccuracies [BibTeX] |
Report of the International Whaling Commission 32:883--888 | ||
BibTeX:
@article{But82b,
author = {Butterworth, D. S.},
title = {On the functional form used for $g(y)$ for minke whale sightings, and bias in its estimation due to measurement inaccuracies},
journal = {Report of the International Whaling Commission},
year = {1982},
volume = {32},
pages = {883--888}
}
|
|||||
| Butterworth, D. S. & Best, P. B. | 1982 | Report of the Southern Hemisphere minke whale assessment cruise, 1980/81 [BibTeX] |
Report of the International Whaling Commission 32:835--874 | ||
BibTeX:
@article{ButBes82,
author = {Butterworth, D. S. and Best, P. B.},
title = {Report of the {S}outhern {H}emisphere minke whale assessment cruise, 1980/81},
journal = {Report of the International Whaling Commission},
year = {1982},
volume = {32},
pages = {835--874}
}
|
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| Butterworth, D. S., Best, P. B. & Basson, M. | 1982 | Results of analysis of sighting experiments carried out during the 1980/81 Southern Hemisphere minke whale assessment cruise [BibTeX] |
Report of the International Whaling Commission 32:819--834 | ||
BibTeX:
@article{Butetal82c,
author = {Butterworth, D. S. and Best, P. B. and Basson, M.},
title = {Results of analysis of sighting experiments carried out during the 1980/81 {S}outhern {H}emisphere minke whale assessment cruise},
journal = {Report of the International Whaling Commission},
year = {1982},
volume = {32},
pages = {819--834}
}
|
|||||
| Butterworth, D. S., Best, P. B. & Hembree, D. | 1984 | Analysis of experiments carried out during the 1981/82 IWC/IDCR Antarctic minke whale assessment cruise in Area II [BibTeX] |
Report of the International Whaling Commission 34:365--392 | ||
| Review: This paper deals with experiments made to assess distance estimation procedures. For one of the boats tested, massive underestimation was noted, with distances being a posteriori multiplied by 1.38 to correct for that fact. |
|||||
BibTeX:
@article{Butetal84,
author = {Butterworth, D. S. and Best, P. B. and Hembree, D.},
title = {Analysis of experiments carried out during the 1981/82 {IWC/IDCR A}ntarctic minke whale assessment cruise in {Area II}},
journal = {Report of the International Whaling Commission},
year = {1984},
volume = {34},
pages = {365--392}
}
|
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| Butterworth, D. S. & Borchers, D. L. | 1988 | Estimates of $g(0)$ for minke schools from the results of the independent observer experiment on the 1985/86 and 1986/87 IWC/IDCR Antarctic assessment cruises [BibTeX] |
Report of the International Whaling Commission 38:301--313 | ||
BibTeX:
@article{ButBor88,
author = {Butterworth, D. S. and Borchers, D. L.},
title = {Estimates of $g(0)$ for minke schools from the results of the independent observer experiment on the 1985/86 and 1986/87 {IWC/IDCR} {A}ntarctic assessment cruises},
journal = {Report of the International Whaling Commission},
year = {1988},
volume = {38},
pages = {301--313}
}
|
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| Byth, K. | 1982 | On robust distance-based intensity estimators [BibTeX] |
Biometrics 38:127--135 | ||
BibTeX:
@article{Byt82,
author = {Byth, K.},
title = {On robust distance-based intensity estimators},
journal = {Biometrics},
year = {1982},
volume = {38},
pages = {127--135}
}
|
|||||
| Byth, K. & Ripley, B. D. | 1980 | On sampling spatial patterns by distance methods [BibTeX] |
Biometrics 36:279--284 | ||
BibTeX:
@article{BytRip36,
author = {Byth, K. and Ripley, B. D.},
title = {On sampling spatial patterns by distance methods},
journal = {Biometrics},
year = {1980},
volume = {36},
pages = {279--284}
}
|
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| Bårdsen, B.-J. & Fox, J. | 2006 | Evaluation of line transect sampling for density estimates of chiru Pantholops hodgsoni in the Aru Basin, Tibet | Wildlife Biology 12:89--100 | ||
| Abstract: The chiru or Tibetan antelope Pantholops hodgsoni has dramatically decreased in number over recent decades, and efficient monitoring of the density and distribution of chiru is vital to the management of this endangered species. We evaluated line transect sampling methodology, using track and cross-county transects, and assessed its conformity to underlying assumptions for use in estimating density of chiru in the ca 2,300 km2 Aru Basin, Tibet. Although violations of some assumptions were apparent, they were generally not substantial, and simple adjustments of sampling design can reduce their effects in future surveys. Sampling effort was not sufficient to demonstrate clear seasonal differences in chiru density between summer and autumn. However, cross-country transects on the west side of the study area did show a statistically significant higher autumn than summer density, and encounter rates (the number of detections per km) were significantly higher for both transect types in autumn. We tested for an expected negative bias associated with track transects, and although a clear difference in estimated density was not found, a significantly higher encounter rate was present for cross-country than for track transects. With increased sampling effort and a more effective design in future surveys, line transect sampling will be a useful methodology for assessment of chiru populations. © Wildlife Biology (2006). | |||||
BibTeX:
@article{Bardsen2006,
author = {B{\aa}rdsen, B.-J. and Fox, J.L.},
title = {Evaluation of line transect sampling for density estimates of chiru \textit{Pantholops hodgsoni} in the {Aru Basin}, {T}ibet},
journal = {Wildlife Biology},
year = {2006},
volume = {12},
pages = {89--100}
}
|
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| Cahill, A. J., Walker, J. S. & Marsden, S. J. | 2006 | Recovery within a population of the Critically Endangered citron-crested cockatoo Cacatua sulphurea citrinocristata in Indonesia after 10 years of international trade control [BibTeX] |
Oryx 40:161--167 | ||
BibTeX:
@article{Cahill2006,
author = {Cahill, A. J. and Walker, J. S. and Marsden, S. J.},
title = {Recovery within a population of the {Critically Endangered citron-crested cockatoo \textit{Cacatua sulphurea citrinocristata} in Indonesia after 10 years of international trade control}},
journal = {Oryx},
year = {2006},
volume = {40},
pages = {161--167}
}
|
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| Calambokidis, J. & Barlow, J. | 2004 | Abundance of blue and humpback whales in the eastern north pacific estimated by capture-recapture and line-transect methods | Marine Mammal Science 20:63--85 | ||
| Abstract: We estimated humpback and blue whale abundance from 1991 to 1997 off the west coast of the U.S. and Mexico comparing capture-recapture models based on photographically identified animals and line-transect methods from ship-based surveys. During photo-identification research we obtained 4,212 identifications of 824 humpback whales and 2,403 identifications of 908 blue whales primarily through non-systematic small-boat surveys along the coast of California, Oregon, and Washington. Line-transect surveys from NOAA ships in 1991, 1993, and 1996 covered approximately 39,000 km along the coast of Baja California, California, Oregon, and Washington out to 555 km from shore. The nearshore and clumped distribution of humpback whales allowed photographic identification from small boats to cost-effectively sample a substantial portion of the population, but made it difficult to obtain effective samples in the line-transect surveys covering broad areas. The humpback capture-recapture estimates indicated humpback whale abundance increased over the six years (from 569 to 837). The broader more offshore distribution of blue whales made it harder to obtain a representative sample of identification photographs, but was well suited to the line-transect estimates. The line-transect estimates, after correction for missed animals, indicated approximately 3,000 blue whales (CV = 0.14). Capture-recapture estimates of blue whales were lower than this: approximately 2,000 when using photographs obtained from the line-transect surveys as one of the samples. Comparison of the results from the two methods provides validation, as well as insight into potential biases associated with each method. | |||||
BibTeX:
@article{Calambokidis2004,
author = {Calambokidis, J. and Barlow, J.},
title = {Abundance of blue and humpback whales in the eastern north pacific estimated by capture-recapture and line-transect methods},
journal = {Marine Mammal Science},
year = {2004},
volume = {20},
number = {1},
pages = {63--85}
}
|
|||||
| Calambokidis, J., Steiger, G. H., Ellifrit, D. K., Troutman, B. L. & Bowlby, C. E. | 2004 | Distribution and abundance of humpback whales (Megaptera novaeangliae) and other marine mammals off the northern Washington coast [BibTeX] |
Fisheries Bulletin 102:563--580 | ||
BibTeX:
@article{Calambokidis2004a,
author = {John Calambokidis and Gretchen H. Steiger and David K. Ellifrit and Barry L. Troutman and C. Edward Bowlby},
title = {Distribution and abundance of humpback whales (\textit{Megaptera novaeangliae}) and other marine mammals off the northern {W}ashington coast},
journal = {Fisheries Bulletin},
year = {2004},
volume = {102},
pages = {563--580}
}
|
|||||
| Camacho, C., Feinberg, J. & Green, T. | 2005 | Use of the program distance to assess population size of the eastern hognose snake (Heterodon platirhinos) at the Brookhaven National Laboratory [BibTeX] |
: | ||
BibTeX:
@unpublished{Camacho,
author = {Camacho, C., and Feinberg, J. and Green, T.},
title = {Use of the program distance to assess population size of the eastern hognose snake (Heterodon platirhinos) at the Brookhaven National Laboratory},
year = {2005},
note = {Poster}
}
|
|||||
| Camp, R. | 2007 | Measurement errors in Hawaiian forest bird surveys and their effect on density estimation [BibTeX] |
: | ||
BibTeX:
@techreport{Camp2007,
author = {Rick Camp},
title = {Measurement errors in Hawaiian forest bird surveys and their effect on density estimation},
year = {2007},
number = {Technical Report HCSU-005}
}
|
|||||
| Camp, R.J., P. T. M. A. A. F. W. L. | 2009 | Recent status and trends of the land bird avifauna on Saipan, Mariana Islands, with emphasis on the endangered Nightingale Reed-warbler Acrocephalus luscinia [BibTeX] |
Bird Conservation International 19:323-337 | URL | |
BibTeX:
@article{Camp2009323,
author = {Camp, R.J., Pratt, T.K., Marshall, A.P., Amidon, F., Williams, L.L.},
title = {Recent status and trends of the land bird avifauna on Saipan, Mariana Islands, with emphasis on the endangered Nightingale Reed-warbler Acrocephalus luscinia},
journal = {Bird Conservation International},
year = {2009},
volume = {19},
number = {4},
pages = {323-337},
note = {cited By (since 1996) 0},
url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-74149094996&partnerID=40&md5=030dd43c00d96a1562faf32b1da3b699}
}
|
|||||
| Carrascal, L. M., Seoane, J. & Palomino, D. | 2008 | Density bias estimations using strip transects in dry open–country environments in the Canary Islands [BibTeX] |
Animal Biodiversity and Conservation 31:45--50 | ||
BibTeX:
@article{Carrascal2008,
author = {Carrascal, L. M. and Seoane, J. and Palomino, D.},
title = {Density bias estimations using strip transects in dry open–country environments in the Canary Islands},
journal = {Animal Biodiversity and Conservation},
year = {2008},
volume = {31},
pages = {45--50}
}
|
|||||
| Carretta, J., Taylor, B. & Chivers, S. | 2001 | Abundance and depth distribution of harbor porpoise (Phocoena phocoena) in northern California determined from a 1995 ship survey [BibTeX] |
Fishery Bulletin 99:29--39 | ||
BibTeX:
@article{Carretta2001,
author = {Carretta, J.V. and Taylor, B.L. and Chivers, S.J.},
title = {Abundance and depth distribution of harbor porpoise (Phocoena phocoena) in northern California determined from a 1995 ship survey},
journal = {Fishery Bulletin},
year = {2001},
volume = {99},
number = {1},
pages = {29--39}
}
|
|||||
| Carretta, J. V., Forney, K. A. & Laake, J. L. | 1998 | Abundance of California coastal bottlenose dolphins estimated from tandem aerial surveys [BibTeX] |
Marine Mammal Science 14:655--675 | ||
BibTeX:
@article{Caretal98,
author = {Carretta, J. V. and Forney, K. A. and Laake, J. L.},
title = {Abundance of {C}alifornia coastal bottlenose dolphins estimated from tandem aerial surveys},
journal = {Marine Mammal Science},
year = {1998},
volume = {14},
pages = {655--675}
}
|
|||||
| Casagrande, D. G. & Beissinger, S. R. | 1997 | Evaluation of four methods for estimating parrot population size [BibTeX] |
Condor 99:445--457 | ||
BibTeX:
@article{CasBei97,
author = {Casagrande, D. G. and Beissinger, S. R.},
title = {Evaluation of four methods for estimating parrot population size},
journal = {Condor},
year = {1997},
volume = {99},
pages = {445--457}
}
|
|||||
| Cassey, P. | 1999 | Estimating animal abundance by distance sampling techniques [BibTeX] |
: | ||
BibTeX:
@techreport{Cassey1999a,
author = {Phillip Cassey},
title = {Estimating animal abundance by distance sampling techniques},
year = {1999}
}
|
|||||
| Cassey, P., Craig, J. L., McArdle, B. H. & Barraclough, R. K. | 2007 | Distance sampling techniques compared for a New Zealand endemic passerine (Philesturnus carunculatus rufusater) [BibTeX] |
New Zealand Journal of Ecology 31:223--231 | ||
BibTeX:
@article{Cassey2007,
author = {Phillip Cassey and John L. Craig and Brian H. McArdle and Rosemary K. Barraclough},
title = {Distance sampling techniques compared for a {New Zealand} endemic passerine (\textit{Philesturnus carunculatus rufusater})},
journal = {New Zealand Journal of Ecology},
year = {2007},
volume = {31},
pages = {223--231}
}
|
|||||
| Cassey, P. & Mcardle, B. | 1999 | An assessment of distance sampling techniques for estimating animal abundance | Environmetrics 10:261--278 | ||
| Abstract: Line transects have been widely applied for the estimation of animal abundance because they are regarded as simple, economical, and relatively precise. The recent development of automated techniques for the estimation of animal density from distance sampling data allows greater potential for field biologists and wildlife managers to become involved in the analytical summary of their research. An assessment was made of the ability of program DISTANCE to produce unbiased estimates of density in spite of potential sources of error from the estimation of transect and population density. Populations were simulated to investigate the robustness of program DISTANCE to changes in the density, distribution, and detection of animals across sampling areas and transects. It is concluded that if distance sampling data is collected reliably from a random sample of possible primary sampling units (PSUs) it can be expected that estimates of density will be presented accurately and with correct estimates of variance. If the proportion of the study area surveyed by transects is large however, then the presence of large between PSU variation will cause the variance estimates from program DISTANCE to be a sizeable overestimate. | |||||
BibTeX:
@article{Cassey1999,
author = {Cassey, P. and Mcardle, B.H.},
title = {An assessment of distance sampling techniques for estimating animal abundance},
journal = {Environmetrics},
year = {1999},
volume = {10},
number = {3},
pages = {261--278}
}
|
|||||
| Cassey, P. & Ussher, G. T. | 1999 | Estimating abundance of tuatara [BibTeX] |
Biological Conservation 88:361--366 | ||
BibTeX:
@article{CasUsh99,
author = {Cassey, P. and Ussher, G. T.},
title = {Estimating abundance of tuatara},
journal = {Biological Conservation},
year = {1999},
volume = {88},
pages = {361--366}
}
|
|||||
| Catry, F., Rego, F., Santos, T., Almeida, J. & Relvas, P. | 2007 | Forest fires prevention in Portugal - Using GIS to help improving early fire detection effectiveness [BibTeX] |
Proceedings of the 4th International Wildland Fire Conference : | ||
BibTeX:
@inproceedings{Catry2007,
author = {Catry, F.X. and Rego, F.C. and Santos, T. and Almeida, J. and Relvas, P.},
title = {Forest fires prevention in Portugal - Using GIS to help improving early fire detection effectiveness},
booktitle = {Proceedings of the 4th International Wildland Fire Conference},
year = {2007}
}
|
|||||
| Catt, D. C., Baines, D., Picozzi, N., Moss, R. & Summers, R. W. | 1998 | Abundance and distribution of capercaillie Tetrao urogallus in Scotland 1992-1994 [BibTeX] |
Biological Conservation 85:257--267 | URL | |
BibTeX:
@article{Catetal98,
author = {Catt, D. C. and Baines, D. and Picozzi, N. and Moss, R. and Summers, R. W.},
title = {Abundance and distribution of capercaillie \textit{{T}etrao urogallus} in {S}cotland 1992-1994},
journal = {Biological Conservation},
year = {1998},
volume = {85},
pages = {257--267},
url = {http://www.sciencedirect.com/science/article/B6V5X-3TP5RMP-M/2/cf5ab2da97251aa6edc656e73cc22ab0}
}
|
|||||
| Caughley, G. | 1974 | Bias in aerial survey [BibTeX] |
Journal of Wildlife Management 38:921--933 | ||
BibTeX:
@article{Cau74,
author = {Caughley, G.},
title = {Bias in aerial survey},
journal = {Journal of Wildlife Management},
year = {1974},
volume = {38},
pages = {921--933}
}
|
|||||
| Caughley, G. | 1972 | Improving the estimates from inaccurate censuses [BibTeX] |
Journal of Wildlife Management 36:135--140 | ||
BibTeX:
@article{Cau72,
author = {Caughley, G.},
title = {Improving the estimates from inaccurate censuses},
journal = {Journal of Wildlife Management},
year = {1972},
volume = {36},
pages = {135--140}
}
|
|||||
| Caughley, G., Sinclair, R. & Scott-Kemmis, D. | 1976 | Experiments in aerial survey [BibTeX] |
Journal of Wildlife Management 40:290--300 | ||
BibTeX:
@article{Cauetal76,
author = {Caughley, G. and Sinclair, R. and Scott-Kemmis, D.},
title = {Experiments in aerial survey},
journal = {Journal of Wildlife Management},
year = {1976},
volume = {40},
pages = {290--300}
}
|
|||||
| Cañadas, A., Desportes, G. & Borchers, D. | 2004 | The estimation of the detection function and g(0) for shortbeaked common dolphins (Delphinus delphis), using doubleplatform data collected during the NASS-95 Faroese survey [BibTeX] |
Journal of Cetacean Research and Management 6:191--198 | ||
BibTeX:
@article{CANADAS2004,
author = {A. Cañadas And G. Desportes And D. Borchers},
title = {The estimation of the detection function and g(0) for shortbeaked common dolphins (\textit{Delphinus delphis}), using doubleplatform data collected during the {NASS-95 Faroese} survey},
journal = {Journal of Cetacean Research and Management},
year = {2004},
volume = {6},
pages = {191--198}
}
|
|||||
| Cañadas, A. & Hammond, P. | 2008 | Abundance and habitat preferences of the short-beaked common dolphin Delphinus delphis in the southwestern Mediterranean: implications for conservation [BibTeX] |
Endangered Species Research 4:309--331 | URL PDF | |
BibTeX:
@article{Canadas2008,
author = {A. Cañadas and P.S. Hammond},
title = {Abundance and habitat preferences of the short-beaked common dolphin \textit{Delphinus delphis} in the southwestern Mediterranean: implications for conservation},
journal = {Endangered Species Research},
year = {2008},
volume = {4},
number = {3},
pages = {309--331},
url = {http://www.int-res.com/abstracts/esr/v4/n3/p309-331/}
}
|
|||||
| Cañadas, A. & Hammond, P. | 2006 | Model-based abundance estimates for bottlenose dolphins off southern Spain: implications for conservation and management [BibTeX] |
Journal of Cetacean Research and Management 8:13-27 | ||
BibTeX:
@article{Canadas2006,
author = {A. Cañadas and P.S. Hammond},
title = {Model-based abundance estimates for bottlenose dolphins off southern Spain: implications for conservation and management},
journal = {Journal of Cetacean Research and Management},
year = {2006},
volume = {8},
pages = {13-27}
}
|
|||||
| Ceia, R. S., Ramos, J. A., Heleno, R. H., Hilton, G. M. & Marques, T. A. | 2011 | Status assessment of the Critically Endangered Azores Bullfinch Pyrrhula murina [BibTeX] |
Bird Conservation International 21:477--489 | DOI | |
BibTeX:
@article{Ceia2011,
author = {Ricardo S. Ceia and Jaime A. Ramos and Ruben H. Heleno and Geoff M. Hilton and Tiago A. Marques},
title = {Status assessment of the Critically Endangered Azores Bullfinch \textit{Pyrrhula murina}},
journal = {Bird Conservation International},
year = {2011},
volume = {21},
pages = {477--489},
doi = {10.1017/S0959270911000025}
}
|
|||||
| Chafota, J. | 1988 | Effect of measurement errors in estimating density from line transect sampling [BibTeX] |
: | ||
BibTeX:
@mastersthesis{Cha88,
author = {Chafota, J.},
title = {Effect of measurement errors in estimating density from line transect sampling},
school = {Colorado State University},
year = {1988}
}
|
|||||
| Chapman, C. A. & Lambert, J. E. | 2000 | Habitat alteration and the conservation of African primates: case study of Kibale National Park, Uganda [BibTeX] |
American Journal of Primatology 50:169--185 | ||
BibTeX:
@article{ChaLam00,
author = {Chapman, C. A. and Lambert, J. E.},
title = {Habitat alteration and the conservation of {A}frican primates: case study of {K}ibale {N}ational {P}ark, {U}ganda},
journal = {American Journal of Primatology},
year = {2000},
volume = {50},
pages = {169--185}
}
|
|||||
| Chaez-Leoń, G. & Velaźquez, A. | 2004 | Abundance and distribution of the Long-tailed Wood-Partridge (Dendrortyx macroura) in a temperate coniferous forest | Journal of Field Ornithology 75:345--352 | ||
| Abstract: The Long-tailed Wood-Partridge (Dendrortyx macroura) is a species endemic to Mexico, inhabiting dense coniferous forests of the Trans-Mexican Volcanic Belt and the Sierra Madre del Sur, of which little is known about its ecology and conservation status. The abundance and density of the Long-tailed Wood-Partridge was estimated by point counts with playback distance sampling from March-October of 1998-2000 in a temperate coniferous forest managed for timber production by a Mexican indigenous community. The average detection rate was 0.31 individuals per point, resulting in a mean estimate for population density of 20.9 birds/km2 and a mean population estimate of 2679 individuals, estimated using the half-normal key function with cosine adjustments. Density estimates of the Long-tailed Wood-Partridge were 8 individuals/km2 in dry, open, scrubby habitats with deep ash and sand volcanic deposits subject to intense human use and in closed canopy, humid forests with moderate human disturbance. Density estimates were 14.6 and 21.5 individuals/km2 in humid, closed canopy, multi-stratified forests. The latter areas are recommended as the core area for protection of the Long-tailed Wood-Partridge. | |||||
BibTeX:
@article{Chavez-Leon2004,
author = {Cha{\'v}ez-Leo{\'n}, G. and Vela{\'z}quez, A.},
title = {Abundance and distribution of the Long-tailed Wood-Partridge \textit{(Dendrortyx macroura)} in a temperate coniferous forest},
journal = {Journal of Field Ornithology},
year = {2004},
volume = {75},
number = {4},
pages = {345--352}
}
|
|||||
| Chelgren, N. D., Samora, B., Adams, M. J. & McCreary, B. | 2011 | Using spatiotemporal models and distance sampling to map the space use and abundance of newly metamorphosed Western Toads (Anaxyrus boreas) [BibTeX] |
Herpetological Conservation and Biology 6:175--190 | ||
BibTeX:
@article{Chelgren2011,
author = {Nathan D. Chelgren and Barbara Samora and Michael J. Adams and Brome McCreary},
title = {Using spatiotemporal models and distance sampling to map the space use and abundance of newly metamorphosed Western Toads (\textit{Anaxyrus boreas})},
journal = {Herpetological Conservation and Biology},
year = {2011},
volume = {6},
pages = {175--190}
}
|
|||||
| Chen, B., Zheng, D., Zhai, F., X. Xu, P. S., Wang, Q. & Yang, G. | 2008 | Abundance, distribution and conservation of chinese white dolphins (Sousa chinensis) in Xiamen, China [BibTeX] |
Mammalian Biology 73:156--164 | ||
BibTeX:
@article{Chen2008,
author = {Bingyao Chen and Dongmei Zheng and Feifei Zhai and X. Xu, P. Sun and Q. Wang and G. Yang},
title = {Abundance, distribution and conservation of chinese {white dolphins (\textit{Sousa chinensis}) in Xiamen, China}},
journal = {Mammalian Biology},
year = {2008},
volume = {73},
pages = {156--164}
}
|
|||||
| Chen, S. X. | 2000 | Animal abundance estimation in independent observer line transect surveys [BibTeX] |
Environmental and Ecological Statistics 7:285--299 | ||
BibTeX:
@article{Che00,
author = {Chen, S. X.},
title = {Animal abundance estimation in independent observer line transect surveys},
journal = {Environmental and Ecological Statistics},
year = {2000},
volume = {7},
pages = {285--299}
}
|
|||||
| Chen, S. X. | 1999 | Estimation in independent observer line transect surveys for clustered populations [BibTeX] |
Biometrics 55:754--759 | ||
BibTeX:
@article{Che99,
author = {Chen, S. X.},
title = {Estimation in independent observer line transect surveys for clustered populations},
journal = {Biometrics},
year = {1999},
volume = {55},
pages = {754--759}
}
|
|||||
| Chen, S. X. | 1998 | Measurement errors in line transect surveys [BibTeX] |
Biometrics 54:899--908 | ||
BibTeX:
@article{CHE98,
author = {Chen, S. X.},
title = {Measurement errors in line transect surveys},
journal = {Biometrics},
year = {1998},
volume = {54},
pages = {899--908}
}
|
|||||
| Chen, S. X. | 1996 | A kernel estimate for the density of a biological population by using line transect sampling [BibTeX] |
Applied Statstics 45:135--150 | ||
| Review: First use of kernels in line transects. He reports the minimizing of MISE as way to choose h optimally, and presents the resulting formula assuming a detection close to Gaussian. He also reports LSCV (least-squares cross-validation) for the same purpose. |
|||||
BibTeX:
@article{CHE96,
author = {Chen, S. X.},
title = {A kernel estimate for the density of a biological population by using line transect sampling},
journal = {Applied Statstics},
year = {1996},
volume = {45},
pages = {135--150}
}
|
|||||
| Chen, S. X. | 1996 | Studying school size effects in line transect sampling using the kernel method [BibTeX] |
Biometrics 52:1283--1294 | ||
BibTeX:
@article{Che96b,
author = {Chen, S. X.},
title = {Studying school size effects in line transect sampling using the kernel method},
journal = {Biometrics},
year = {1996},
volume = {52},
pages = {1283--1294}
}
|
|||||
| Chen, S. X. & Cowling, A. | 2001 | Measurement errors in line transect surveys where detectability varies with distance and size [BibTeX] |
Biometrics 57:732--742 | ||
BibTeX:
@article{CHE01,
author = {Chen, S. X. and Cowling, A.},
title = {Measurement errors in line transect surveys where detectability varies with distance and size},
journal = {Biometrics},
year = {2001},
volume = {57},
pages = {732--742}
}
|
|||||
| Chen, S. X. & Lloyd, C. J. | 2000 | A nonparametric approach to the analysis of two-stage mark-recapture experiments [BibTeX] |
Biometrika 87:633--649 | ||
BibTeX:
@article{CheLlo00,
author = {Chen, S. X. and Lloyd, C. J.},
title = {A nonparametric approach to the analysis of two-stage mark-recapture experiments},
journal = {Biometrika},
year = {2000},
volume = {87},
pages = {633--649}
}
|
|||||
| Chen, S. X., Yip, P. S. F. & Zhou, Y. | 2002 | Sequential Estimation in Line Transect Surveys | Biometrics 58:263--269 | ||
| Abstract: This article considers using sequential procedures to determine the amount of survey effort required in a line transect survey in order to achieve a certain precision level in estimating the abundance of a biological population. Sequential procedures are constructed for both parametric and nonparametric animal abundance estimators. The criterion used to derive the stopping rules is the width of confidence intervals for the animal abundance. For each estimator considered, we develop stopping rules based on the asymptotic distributions and the bootstrap. A sequential analysis on an aerial survey of the southern bluefin tuna indicates substantial saving of survey effort can be made by employment of the proposed sequential procedures. This savings of survey effort is also observed in a simulation study designed to evaluate the empirical performance of the proposed sequential procedures. | |||||
BibTeX:
@article{ChenBiometrics2002,
author = {Song Xi Chen and Paul S. F. Yip and Yong Zhou},
title = {Sequential Estimation in Line Transect Surveys},
journal = {Biometrics},
year = {2002},
volume = {58},
number = {2},
pages = {263--269}
}
|
|||||
| Cherenkov, S. E. | 1998 | Accuracy of one-visit censuses of forest passerine birds during a breeding season [BibTeX] |
Zoologichesky Zhurnal 77:474--485 | ||
BibTeX:
@article{Cher98,
author = {Cherenkov, S. E.},
title = {Accuracy of one-visit censuses of forest passerine birds during a breeding season},
journal = {Zoologichesky Zhurnal},
year = {1998},
volume = {77},
pages = {474--485}
}
|
|||||
| Chiarello, A. G. | 1999 | Effects of fragmentation of the Atlantic forest on mammal communities in south-eastern Brazil [BibTeX] |
Biological Conservation 89:71--82 | ||
BibTeX:
@article{Chi99,
author = {Chiarello, A. G.},
title = {Effects of fragmentation of the {A}tlantic forest on mammal communities in south-eastern {B}razil},
journal = {Biological Conservation},
year = {1999},
volume = {89},
pages = {71--82}
}
|
|||||
| Childs, J. E., Robinson, L. E., Sadek, R., Madden, A., Miranda, M. E. & Miranda, N. L. | 1998 | Density estimates of rural dog populations and an assessment of marking methods during a rabies vaccination campaign in the Philippines | Preventive Veterinary Medicine 33:207--218 | ||
| Abstract: We estimated the population density of dogs by distance sampling and assessed the potential utility of two marking methods for capture-mark-recapture applications following a mass canine rabies-vaccination campaign in Sorsogon Province, the Republic of the Philippines. Thirty villages selected to assess vaccine coverage and for dog surveys were visited 1 to 11 days after the vaccinating team. Measurements of the distance of dogs or groups of dogs from transect lines were obtained in 1088 instances (N = 1278 dogs; mean group size = 1.2). Various functions modelling the probability of detection were fitted to a truncated distribution of distances of dogs from transect lines. A hazard rate model provided the best fit and an overall estimate of dog-population density of 468/km2 (95% confidence interval, 359 to 611). At vaccination, most dogs were marked with either a paint stick or a black plastic collar. Overall, 34.8% of 2167 and 28.5% of 2115 dogs could be accurately identified as wearing a collar or showing a paint mark; 49.1% of the dogs had either mark. Increasing time interval between vaccination-team visit and dog survey and increasing distance from transect line were inversely associated with the probability of observing a paint mark. Probability of observing a collar was positively associated with increasing estimated density of the dog population in a given village and with animals not associated with a house. The data indicate that distance sampling is a relatively simple and adaptable method for estimating dog-population density and is not prone to problems associated with meeting some model assumptions inherent to mark-recapture estimators. © 1998 Elsevier Science B.V. | |||||
BibTeX:
@article{Childs1998,
author = {Childs, J. E. and Robinson, L. E. and Sadek, R. and Madden, A. and Miranda, M. E. and Miranda, N. L.},
title = {Density estimates of rural dog populations and an assessment of marking methods during a rabies vaccination campaign in the Philippines},
journal = {Preventive Veterinary Medicine},
year = {1998},
volume = {33},
number = {1-4},
pages = {207--218}
}
|
|||||
| Clancy, T. F., Pople, A. R. & Gibson, L. A. | 1997 | Comparison of helicopter line transects with walked line transects for estimating densities of kangaroos [BibTeX] |
Wildlife Research 24:397--409 | ||
BibTeX:
@article{Claetal97,
author = {Clancy, T. F. and Pople, A. R. and Gibson, L. A.},
title = {Comparison of helicopter line transects with walked line transects for estimating densities of kangaroos},
journal = {Wildlife Research},
year = {1997},
volume = {24},
pages = {397--409}
}
|
|||||
| Clark, P. J. & Evans, F. C. | 1954 | Distance to nearest neighbour as a measure of spatial relationships in populations [BibTeX] |
Ecology 35:23--30 | ||
BibTeX:
@article{ClaEva54,
author = {Clark, P. J. and Evans, F. C.},
title = {Distance to nearest neighbour as a measure of spatial relationships in populations},
journal = {Ecology},
year = {1954},
volume = {35},
pages = {23--30}
}
|
|||||
| Clarke, R., Boulton, R. & Clarke, M. | 2005 | Estimating population size of the Black-eared Miner, with an assessment of landscape-scale habitat requirements | Pacific Conservation Biology 11:174--188 | ||
| Abstract: The decline of the Black-eared Miner Manorina melanotis has been caused primarily by habitat degradation and vegetation clearance. To better direct conservation actions for this species there was a need to assess habitat requirements on a regional-scale and to estimate the population size using quantitative methods. We used vegetation mapping and the current distribution of the Black-eared Miner to determine regional-scale habitat requirements. These findings were combined with the results of distance sampling to provide population estimates. The species is restricted to large tracts of intact mallee in the Murray Mallee of southeastern Australia that have not been burnt for at least 45 years. The density of Black-eared Miners is highest in areas that are dominated by mallee-Triodia associations and have not been intensively grazed. The Bookmark Biosphere Reserve supports an estimated 501 (270-927, 95% Cl) colonies, containing 3 758 (2 026-6 954) phenotypically pure Black-eared Miners, 2 255 (1 215-4170) hybrids and small numbers of Yellow-throated Miners Manorina flavigula. However, the effective population size is considerably smaller (390 Black-eared Miners (210-726) and 234 hybrids (126-433)), due to a skewed adult sex ratio (1 female: 1.81 males) and complex social organization. A smaller population also persists in the Murray Sunset National Park containing 53 (32-85) Black-eared Miner/hybrid colonies. Both populations face a high risk of extinction from large-scale wildfire. The endangered status of the species under IUCN criteria remains warranted. | |||||
BibTeX:
@article{Clarke2005,
author = {Clarke, R.H. and Boulton, R.L. and Clarke, M.F.},
title = {Estimating population size of the Black-eared Miner, with an assessment of landscape-scale habitat requirements},
journal = {Pacific Conservation Biology},
year = {2005},
volume = {11},
number = {3},
pages = {174--188}
}
|
|||||
| Clement, D., Slooten, D., Dawson, S. & DuFresne, S. | 2001 | Line-transect survey of Hector's dolphin abundance between Farewell Spit and Motunau [BibTeX] |
: | ||
BibTeX:
@techreport{Clement2001,
author = {Clement, D. and Slooten, D. and Dawson, S. and DuFresne, S.},
title = {Line-transect survey of Hector's dolphin abundance between Farewell Spit and Motunau},
year = {2001},
number = {22}
}
|
|||||
| Colket, B. & Church, K. E. | 2005 | A Comparison of Traditional Counts and Distance Sampling Methods for Estimating the Abundance of Ute Ladies'-tresses (Spiranthes diluvialis) [BibTeX] |
: | ||
BibTeX:
@techreport{Colket2005,
author = {Beth Colket and Kevin E. Church},
title = {A Comparison of Traditional Counts and Distance Sampling Methods for Estimating the Abundance of Ute Ladies'-tresses (\textit{Spiranthes diluvialis})},
year = {2005}
}
|
|||||
| Compton, R., Banks, A., Goodwin, L. & Hooker, S. K. | 2007 | Pilot cetacean survey of the sub-Arctic North Atlantic utilizing a cruise-ship platform [BibTeX] |
Journal of the Marine Biological Association of the United Kingdom 87:321--325 | ||
BibTeX:
@article{Compton2007,
author = {Ross Compton and Aaron Banks and Lissa Goodwin and Sascha K. Hooker},
title = {Pilot cetacean survey of the sub-Arctic North Atlantic utilizing a cruise-ship platform},
journal = {Journal of the Marine Biological Association of the United Kingdom},
year = {2007},
volume = {87},
pages = {321--325}
}
|
|||||
| Conn, P., Arthur, A., Bailey, L. & Singleton, G. | 2006 | Estimating the abundance of mouse populations of known size: Promises and pitfalls of new methods | Ecological Applications 16:829--837 | ||
| Abstract: Knowledge of animal abundance is fundamental to many ecological studies. Frequently, researchers cannot determine true abundance, and so must estimate it using a method such as mark-recapture or distance sampling. Recent advances in abundance estimation allow one to model heterogeneity with individual covariates or mixture distributions and to derive multimodel abundance estimators that explicitly address uncertainty about which model parameterization best represents truth. Further, it is possible to borrow information on detection probability across several populations when data are sparse. While promising, these methods have not been evaluated using mark-recapture data from populations of known abundance, and thus far have largely been overlooked by ecologists. In this paper, we explored the utility of newly developed mark-recapture methods for estimating the abundance of 12 captive populations of wild house mice (Mus musculus). We found that mark-recapture methods employing individual covariates yielded satisfactory abundance estimates for most populations. In contrast, model sets with heterogeneity formulations consisting solely of mixture distributions did not perform well for several of the populations. We show through simulation that a higher number of trapping occasions would have been necessary to achieve good estimator performance in this case. Finally, we show that simultaneous analysis of data from low abundance populations can yield viable abundance estimates. © 2006 by the Ecological Society of America. | |||||
BibTeX:
@article{Conn2006,
author = {Conn, P.B. and Arthur, A.D. and Bailey, L.L. and Singleton, G.R.},
title = {Estimating the abundance of mouse populations of known size: Promises and pitfalls of new methods},
journal = {Ecological Applications},
year = {2006},
volume = {16},
number = {2},
pages = {829--837}
}
|
|||||
| Conroy, M. J., Nichols, J. D. & Asanza, E. R. | 1997 | Métodos cuantitativos contemporáneos para entender y manejar poblaciones y comunidades animales [Contemporary quantitative methods to understand and manage animal populations and communities] [BibTeX] |
Interciencia 22:247--258 | ||
BibTeX:
@article{Conetal97,
author = {Conroy, M. J. and Nichols, J. D. and Asanza, E. R.},
title = {M\'etodos cuantitativos contempor\'aneos para entender y manejar poblaciones y comunidades animales [Contemporary quantitative methods to understand and manage animal populations and communities]},
journal = {Interciencia},
year = {1997},
volume = {22},
pages = {247--258}
}
|
|||||
| Cook, J. R. & Stefanski, L. A. | 1994 | Simulation-extrapolation estimation in parametric measurement error models [BibTeX] |
Journal of the American Statistical Association 89:1314--1328 | ||
BibTeX:
@article{COO94,
author = {Cook, J. R. and Stefanski, L. A.},
title = {Simulation-extrapolation estimation in parametric measurement error models},
journal = {Journal of the American Statistical Association},
year = {1994},
volume = {89},
pages = {1314--1328}
}
|
|||||
| Cook, R. D. & Jacobsen, J. O. | 1979 | A design for estimating visibility bias in aerial surveys [BibTeX] |
Biometrics 35:735--742 | ||
BibTeX:
@article{CooJac79,
author = {Cook, R. D. and Jacobsen, J. O.},
title = {A design for estimating visibility bias in aerial surveys},
journal = {Biometrics},
year = {1979},
volume = {35},
pages = {735--742}
}
|
|||||
| Cooke, J. G. | 2001 | A modification of the radial distance method for dual-platform line transect analysis, to improve robustness [BibTeX] |
: | ||
BibTeX:
@techreport{Coo01,
author = {Cooke, J. G.},
title = {A modification of the radial distance method for dual-platform line transect analysis, to improve robustness},
year = {2001},
number = {Paper SC/53/IA31}
}
|
|||||
| Cooke, J. G. | 1997 | An implementation of a surfacing-based approach to abundance estimation of minke whales from shipborne surveys [BibTeX] |
Report of the International Whaling Commission 47:513--528 | ||
BibTeX:
@article{Coo97,
author = {Cooke, J. G.},
title = {An implementation of a surfacing-based approach to abundance estimation of minke whales from shipborne surveys},
journal = {Report of the International Whaling Commission},
year = {1997},
volume = {47},
pages = {513--528}
}
|
|||||
| Cooke, J. G. | 1987 | Estimation of the population of minke whales in Antarctic Area IVW in 1984/85 [BibTeX] |
Report of the International Whaling Commission 37:273--276 | ||
BibTeX:
@article{Coo87,
author = {Cooke, J. G.},
title = {Estimation of the population of minke whales in {A}ntarctic {A}rea {IVW} in 1984/85},
journal = {Report of the International Whaling Commission},
year = {1987},
volume = {37},
pages = {273--276}
}
|
|||||
| Cooke, J. G. | 1985 | Notes on the estimation of whale density from line transects [BibTeX] |
Report of the International Whaling Commission 35:319--323 | ||
BibTeX:
@article{Coo85,
author = {Cooke, J. G.},
title = {Notes on the estimation of whale density from line transects},
journal = {Report of the International Whaling Commission},
year = {1985},
volume = {35},
pages = {319--323}
}
|
|||||
| Cooke, J. G. & Leaper, R. | 1998 | General modelling framework for the estimation of whale abundance from line transect surveys [BibTeX] |
: | ||
BibTeX:
@techreport{CooLea98,
author = {Cooke, J. G. and Leaper, R.},
title = {General modelling framework for the estimation of whale abundance from line transect surveys},
year = {1998},
number = {Paper SC/50/RMP21}
}
|
|||||
| Corn, J. L. & Conroy, M. J. | 1998 | Estimation of density of mongooses with capture-recapture and distance sampling | Journal of Mammalogy 79:1009--1015 | ||
| Abstract: We captured mongooses (Herpestes javanicus) in live traps arranged in trapping webs in Antigua, West Indies, and used capture-recapture and distance sampling to estimate density. Distance estimation and program DISTANCE were used to provide estimates of density from the trapping-web data. Mean density based on trapping webs was 9.5 mongooses/ha (range, 5.9-10.2/ha); estimates had coefficients of variation ranging from 29.82-31.58% (bar X = 30.46%). Mark-recapture models were used to estimate abundance, which was converted to density using estimates of effective trap area. Tests of model assumptions provided by CAPTURE indicated pronounced heterogeneity in capture probabilities and some indication of behavioral response and variation over time. Mean estimated density was 1.80 mongooses/ha (range, 1.37-2.15/ha) with estimated coefficients of variation of 4.68-11.92% (bar X = 7.46%). Estimates of density based on mark-recapture data depended heavily on assumptions about animal home ranges; variances of densities also may be underestimated, leading to unrealistically narrow confidence intervals. Estimates based on trap webs require fewer assumptions, and estimated variances may be a more realistic representation of sampling variation. Because trap webs are established easily and provide adequate data for estimation in a few sample occasions, the method should be efficient and reliable for estimating densities of mongooses. | |||||
BibTeX:
@article{Corn1998,
author = {Corn, J. L. and Conroy, M. J.},
title = {Estimation of density of mongooses with capture-recapture and distance sampling},
journal = {Journal of Mammalogy},
year = {1998},
volume = {79},
number = {3},
pages = {1009--1015}
}
|
|||||
| Cosens, S. & Innes, S. | 2000 | Distribution and numbers of bowhead whales (Balaena mysticetus) in northwestern Hudson Bay in August 1995 [BibTeX] |
Arctic 53:36--41 | ||
BibTeX:
@article{Cosens2000,
author = {Cosens, S.E. and Innes, S.},
title = {Distribution and numbers of bowhead whales (Balaena mysticetus) in northwestern Hudson Bay in August 1995},
journal = {Arctic},
year = {2000},
volume = {53},
number = {1},
pages = {36--41}
}
|
|||||
| Cottam, G. & Curtis, J. T. | 1956 | The use of distance measures in phytosociological sampling [BibTeX] |
Ecology 37:451--460 | ||
BibTeX:
@article{CotCur56,
author = {Cottam, G. and Curtis, J. T.},
title = {The use of distance measures in phytosociological sampling},
journal = {Ecology},
year = {1956},
volume = {37},
pages = {451--460}
}
|
|||||
| Coulson, G. | 1993 | Use of heterogeneous habitat by the western gray kangaroo, Macropus fuliginosus [BibTeX] |
Wildlife Research 20:137--149 | ||
BibTeX:
@article{Cou93,
author = {Coulson, G.},
title = {Use of heterogeneous habitat by the western gray kangaroo, \emph{{M}acropus fuliginosus}},
journal = {Wildlife Research},
year = {1993},
volume = {20},
pages = {137--149}
}
|
|||||
| Coulson, G. M. & Raines, J. A. | 1985 | Methods for small-scale surveys of grey kangaroo populations [BibTeX] |
Australian Wildlife Research 12:119--125 | ||
BibTeX:
@article{CouRai85,
author = {Coulson, G. M. and Raines, J. A.},
title = {Methods for small-scale surveys of grey kangaroo populations},
journal = {Australian Wildlife Research},
year = {1985},
volume = {12},
pages = {119--125}
}
|
|||||
| Cowling, A. | 1998 | Spatial methods for line transect surveys [BibTeX] |
Biometrics 54:828--839 | ||
BibTeX:
@article{Cow98,
author = {Cowling, A.},
title = {Spatial methods for line transect surveys},
journal = {Biometrics},
year = {1998},
volume = {54},
pages = {828--839}
}
|
|||||
| Cox, M. J., Borchers, D. L., Demer, D. A., Cutter, G. R. & Brierley, A. S. | 2011 | Estimating the density of Antarctic krill (Euphausia superba) from multi-beam echo-sounder observations using distance sampling methods [BibTeX] |
Applied Statistics 60:301--316 | ||
BibTeX:
@article{Cox2011,
author = {Martin J. Cox and David L. Borchers and David A. Demer and George R. Cutter and Andrew S. Brierley},
title = {Estimating the density of Antarctic krill (\textit{Euphausia superba}) from multi-beam echo-sounder observations using distance sampling methods},
journal = {Applied Statistics},
year = {2011},
volume = {60},
pages = {301--316}
}
|
|||||
| Cox, T. F. | 1976 | The robust estimation of the density of a forest stand using a new conditioned distance method [BibTeX] |
Biometrika 63:493--500 | ||
BibTeX:
@article{Cox76,
author = {Cox, T. F.},
title = {The robust estimation of the density of a forest stand using a new conditioned distance method},
journal = {Biometrika},
year = {1976},
volume = {63},
pages = {493--500}
}
|
|||||
| Crain, B. R. | 1998 | Some comments on line transect grouped data analysis [BibTeX] |
Ecological Modelling 109:243--249 | ||
BibTeX:
@article{Cra98,
author = {Crain, B. R.},
title = {Some comments on line transect grouped data analysis},
journal = {Ecological Modelling},
year = {1998},
volume = {109},
pages = {243--249}
}
|
|||||
| Crain, B. R. | 1998 | Window sensitivity functions for line transect sampling [BibTeX] |
Environmental Management 22:471--481 | ||
BibTeX:
@article{Cra98b,
author = {Crain, B. R.},
title = {Window sensitivity functions for line transect sampling},
journal = {Environmental Management},
year = {1998},
volume = {22},
pages = {471--481}
}
|
|||||
| Crain, B. R. | 1974 | Estimation of distributions using orthogonal expansions [BibTeX] |
The Annals of Statistics 2:454--463 | ||
BibTeX:
@article{Cra74,
author = {Crain, B. R.},
title = {Estimation of distributions using orthogonal expansions},
journal = {The Annals of Statistics},
year = {1974},
volume = {2},
pages = {454--463}
}
|
|||||
| Crain, B. R., Burnham, K. P., Anderson, D. R. & Laake, J. L. | 1979 | Nonparametric estimation of population density for line transect sampling using Fourier series [BibTeX] |
Biometrical Journal 21:731--748 | ||
BibTeX:
@article{Craetal79,
author = {Crain, B. R. and Burnham, K. P. and Anderson, D. R., and Laake, J. L.},
title = {Nonparametric estimation of population density for line transect sampling using {F}ourier series},
journal = {Biometrical Journal},
year = {1979},
volume = {21},
pages = {731--748}
}
|
|||||
| Crain, B. R., Burnham, K. P., Anderson, D. R. & Laake, J. L. | 1978 | A Fourier Series Estimator of Population Density for Line Transect Sampling [BibTeX] |
: | ||
BibTeX:
@book{Craetal78,
author = {Crain, B. R. and Burnham, K. P. and Anderson, D. R. and Laake, J. L.},
title = {A {F}ourier Series Estimator of Population Density for Line Transect Sampling},
publisher = {Utah State University Press},
year = {1978}
}
|
|||||
| Crase, B., Duguid, A., Pengart, R. N., Jakamarra, P. W., Angal, L. P. & adn Aggie Woods Kemarr, M. S. P. | 2010 | Distribution and conservation status of the Giant Sweet Potato, a rare Aboriginal food plant from Central Australia [BibTeX] |
Northern Territory Naturalist 22:17--30 | ||
BibTeX:
@article{Crase2010,
author = {Beth Crase and Angus Duguid and Raymond Nelson Pengart and Paddy Willis Jakamarra and Laurie Price Angal and Margaret Scobie Pengart adn Aggie Woods Kemarr},
title = {Distribution and conservation status of the Giant Sweet Potato, a rare Aboriginal food plant from Central Australia},
journal = {Northern Territory Naturalist},
year = {2010},
volume = {22},
pages = {17--30}
}
|
|||||
| Crespo, E. A., Pedraza, S. N., Grandi, M. F., Dans, S. L. & Garaffo, G. V. | 2010 | Abundance and distribution of endangered Franciscana dolphins in Argentine waters and conservation implications [BibTeX] |
Marine Mammal Science 26:17--35 | DOI | |
BibTeX:
@article{Crespo2010,
author = {Crespo, Enrique A. and Pedraza, Susana N. and Grandi, M. Florencia and Dans, Silvana L. and Garaffo, Griselda V.},
title = {Abundance and distribution of endangered Franciscana dolphins in Argentine waters and conservation implications},
journal = {Marine Mammal Science},
year = {2010},
volume = {26},
pages = {17--35},
doi = {10.1111/j.1748-7692.2009.00313.x}
}
|
|||||
| Cuarón, A. D., Martínez-Morales, M. A., McFadden, K. W., Valenzuela, D. & Gompper, M. E. | 2004 | The status of dwarf carnivores on Cozumel Island, Mexico [BibTeX] |
Biodiversity and Conservation 13:317--331 | ||
BibTeX:
@article{Cuaron2004,
author = {Cuar{\'o}n, A. D. and Mart{\'i}nez-Morales, M. A. and McFadden, K. W. and Valenzuela, D. and Gompper, M. E.},
title = {The status of dwarf carnivores on Cozumel Island, Mexico},
journal = {Biodiversity and Conservation},
year = {2004},
volume = {13},
number = {2},
pages = {317--331}
}
|
|||||
| Dahlheim, M., York, A., Towell, R., Waite, J. & Breiwick, J. | 2000 | Harbor porpoise (Phocoena phocoena) abundance in Alaska: Bristol Bay to Southeast Alaska, 1991-1993 [BibTeX] |
Marine Mammal Science 16:28--45 | ||
BibTeX:
@article{Dahetal00,
author = {Dahlheim, M. and York, A. and Towell, R. and Waite, J. and Breiwick, J.},
title = {Harbor porpoise (\emph{{P}hocoena phocoena}) abundance in {A}laska: {B}ristol {B}ay to {S}outheast {A}laska, 1991-1993},
journal = {Marine Mammal Science},
year = {2000},
volume = {16},
pages = {28--45}
}
|
|||||
| Dallimer, M. & King, T. | 2007 | Habitat preferences of the forest birds on the island of Príncipe, Gulf of Guinea [BibTeX] |
African Journal of Ecology 46:258--266 | ||
BibTeX:
@article{Dallimer2007,
author = {Martin Dallimer and Tony King},
title = {Habitat preferences of the forest birds on the island of Príncipe, Gulf of Guinea},
journal = {African Journal of Ecology},
year = {2007},
volume = {46},
pages = {258--266}
}
|
|||||
| Dallimer, M., King, T. & Atkinson, R. J. | 2009 | Pervasive threats within a protected area: conserving the endemic birds of São Tomé, West Africa [BibTeX] |
Animal Conservation 12:209--219 | ||
BibTeX:
@article{Dallimer2009,
author = {Dallimer, M. and King, T. and Atkinson, R. J.},
title = {Pervasive threats within a protected area: conserving the endemic birds of São Tomé, West Africa},
journal = {Animal Conservation},
year = {2009},
volume = {12},
pages = {209--219}
}
|
|||||
| Dallimer, M., Melo, M., Collar, N. J. & Jones, P. J. | 2010 | The Príncipe Thrush Turdus xanthorhynchus: a newly split, "Critically Endangered", forest flagship species [BibTeX] |
Bird Conservation International First View:1-7 | DOI URL | |
BibTeX:
@article{CambridgeJournals:7852429,
author = {Dallimer, Martin And Melo, Martim And Collar, Nigel J. And Jones, Peter J.},
title = {The Príncipe Thrush Turdus xanthorhynchus: a newly split, "Critically Endangered", forest flagship species},
journal = {Bird Conservation International},
year = {2010},
volume = {First View},
number = { },
pages = {1-7},
url = {http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=7852429&fulltextType=RA&fileId=S0959270910000390},
doi = {10.1017/S0959270910000390}
}
|
|||||
| Daniel, A., Holechek, J., Valdez, R., Tembo, A., Saiwana, L., Fusco, M. & Cardenas, M. | 1993 | Jackrabbit densities on fair and good condition Chihuahuan desert range [BibTeX] |
Journal of Range Management 46:524--528 | ||
BibTeX:
@article{Danetal93,
author = {Daniel, A. and Holechek, J. and Valdez, R. and Tembo, A. and Saiwana, L. and Fusco, M. and Cardenas, M. },
title = {Jackrabbit densities on fair and good condition {C}hihuahuan desert range},
journal = {Journal of Range Management},
year = {1993},
volume = {46},
pages = {524--528}
}
|
|||||
| Dawson, D. G. | 1981 | Counting birds for a relative measure (index) of density [BibTeX] |
Estimating Numbers of Terrestrial Birds :12--16 | ||
BibTeX:
@incollection{Daw81,
author = {Dawson, D. G.},
title = {Counting birds for a relative measure (index) of density},
booktitle = {Estimating Numbers of Terrestrial Birds},
publisher = {Cooper Ornithological Society},
year = {1981},
number = {6},
pages = {12--16}
}
|
|||||
| Dawson, S., DuFresne, S., Slooten, E. & Wade, P. | 2000 | Line-transect survey of Hector's dolphin abundance between Motunau and Timaru [BibTeX] |
: | ||
BibTeX:
@techreport{Dawson2000,
author = {Dawson, S. and DuFresne, S. and Slooten, E. and P. Wade},
title = {Line-transect survey of Hector's dolphin abundance between Motunau and Timaru},
year = {2000},
number = {3072}
}
|
|||||
| Dawson, S., Slooten, E., DuFresne, S., Wade, P. & Clement, D. | 2004 | Small-boat surveys for coastal dolphins: Line-transect surveys for Hector's dolphins (Cephalorhynchus hectori) | Fishery Bulletin 102:441--451 | ||
| Abstract: Management of coastal species of small cetaceans is often impeded by a lack of robust estimates of their abundance. In the Austral summers of 1997-98, 1998-99, and 1999-2000 we conducted line-transect surveys of Hector's dolphin (Cephalorhynchus hectori) abundance off the north, east, and south coasts of the South Island of New Zealand. Survey methods were modified for the use of a 15-m sailing catamaran, which was equipped with a collapsible sighting platform giving observers an eye-height of 6 m. Eighty-six percent of 2061 km of survey effort was allocated to inshore waters (4 nautical miles [nmi] or 7.4 km from shore), and the remainder to offshore waters (4-10 nmi or 7.4-18.5 km from shore). Transects were placed at 45° to the shore and spaced apart by 1, 2, 4, or 8 nmi according to pre-existing data on dolphin density. Survey effort within strata was uniform. Detection functions for sheltered waters and open coasts were fitted separately for each survey. The effect of attraction of dolphins to the survey vessel and the fraction of dolphins missed on the trackline were assessed with simultaneous boat and helicopter surveys in January 1999. Hector's dolphin abundance in the coastal zone to 4 nmi offshore was calculated at 1880 individuals (CV=15.7%, log-normal 95% CI=1384-2554). These surveys are the first line-transect surveys for cetaceans in New Zealand's coastal waters. | |||||
BibTeX:
@article{Dawetal04,
author = {Dawson, S. and Slooten, E. and DuFresne, S. and Wade, P. and Clement, D.},
title = {Small-boat surveys for coastal dolphins: Line-transect surveys for Hector's dolphins (Cephalorhynchus hectori)},
journal = {Fishery Bulletin},
year = {2004},
volume = {102},
number = {3},
pages = {441--451}
}
|
|||||
| Dawson, S., Wade, P., Slooten, E. & Barlow, J. | 2008 | Design and field methods for sighting surveys of cetaceans in coastal and riverine habitats [BibTeX] |
Mammal Review 38:19-49 | DOI URL | |
BibTeX:
@article{DawsonJanuary2008,
author = {Dawson, Steve and Wade, Paul and Slooten, Elisabeth and Barlow, Jay},
title = {Design and field methods for sighting surveys of cetaceans in coastal and riverine habitats},
journal = {Mammal Review},
year = {2008},
volume = {38},
pages = {19-49},
url = {http://www.ingentaconnect.com/content/bsc/mam/2008/00000038/00000001/art00002},
doi = {doi:10.1111/j.1365-2907.2008.00119.x}
}
|
|||||
| De Boer, M. N., Leaper, R., Keith, S. & Simmonds, M. P. | 2008 | Winter abundance estimates for the common dolphin (Delphinus delphis) in the western approaches of the English Channel and the effect of responsive movement [BibTeX] |
Journal of Marine Animals and Their Ecology 1:14--20 | ||
BibTeX:
@article{DeBoer2008,
author = {De Boer, M. N. and Leaper, R and Keith, S. and Simmonds, M. P.},
title = {Winter abundance estimates for the common dolphin (\textit{Delphinus delphis}) in the western approaches of the {English Channel} and the effect of responsive movement},
journal = {Journal of Marine Animals and Their Ecology},
year = {2008},
volume = {1},
pages = {14--20}
}
|
|||||
| DeJong, M. J. & Emlen, J. T. | 1985 | The shape of the auditory detection function and its implication for songbird censusing [BibTeX] |
Journal of Field Ornithology 56:213--223 | ||
BibTeX:
@article{DejEml85,
author = {DeJong, M. J. and Emlen, J. T.},
title = {The shape of the auditory detection function and its implication for songbird censusing},
journal = {Journal of Field Ornithology},
year = {1985},
volume = {56},
pages = {213--223}
}
|
|||||
| DeMaster, D. P., Lowry, L. F. & Frost, K. J. | 2001 | The effect of sea state on estimates of abundance for beluga whales (Delphinapterus leucas) in Norton Sound, Alaska [BibTeX] |
Fishery Bulletin 99:197--201 | ||
BibTeX:
@article{DeMaster2001,
author = {Douglas P. DeMaster and Lloyd F. Lowry and Kathryn J. Frost},
title = {The effect of sea state on estimates of abundance for beluga whales (\textit{{D}elphinapterus leucas}) in {N}orton {S}ound, {A}laska},
journal = {Fishery Bulletin},
year = {2001},
volume = {99},
pages = {197--201}
}
|
|||||
| DeSante, D. F. | 1981 | A field test of the variable circular-plot censusing technique in a California coastal scrub breeding bird community [BibTeX] |
Estimating Numbers of Terrestrial Birds :177--185 | ||
BibTeX:
@incollection{Des81,
author = {DeSante, D. F.},
title = {A field test of the variable circular-plot censusing technique in a {C}alifornia coastal scrub breeding bird community},
booktitle = {Estimating Numbers of Terrestrial Birds},
publisher = {Cooper Ornithological Society},
year = {1981},
number = {6},
pages = {177--185}
}
|
|||||
| DeSante, D. F. | 1986 | A field test of the variable circular-plot censusing method in a Sierran subalpine forest habitat [BibTeX] |
Condor 88:129--142 | ||
| Review: São realizadas primeiro amostragens intensivas pelo método dos mapas para determinar as densidades "verdadeiras" com as quais se comparam as obtidas por VCP. O VCP é mausinho. Exemplo de como o tempo não instantaneo e o movimento levam a sobreestimação. Exemplo dos erros de distâncias. Exemplo de vocalizações ventriculares. Diz que os point counts podem ser bons (mas é tolo, porque o habitat é muito semelhante) Artigo analisado no DSB (pag.311) |
|||||
BibTeX:
@article{Des86,
author = {DeSante, D. F.},
title = {A field test of the variable circular-plot censusing method in a {S}ierran subalpine forest habitat},
journal = {Condor},
year = {1986},
volume = {88},
pages = {129--142},
note = {ID240}
}
|
|||||
| Desbiez, A. & Tomas, W. M. | 2003 | Aplicabilidade do método de amostragem de distâncias em levantamentos de médios e grandes vertebrados no Pantana [BibTeX] |
: | ||
BibTeX:
@techreport{Desbiez2003,
author = {Arnaud Desbiez and Walfrido Moraes Tomas},
title = {Aplicabilidade do método de amostragem de distâncias em levantamentos de médios e grandes vertebrados no Pantana},
year = {2003}
}
|
|||||
| DeVries, P. G. | 1979 | A generalization of the Hayne-type estimator as an application of line intercept sampling [BibTeX] |
Biometrics 35:743--748 | ||
BibTeX:
@article{Dev79,
author = {DeVries, P. G.},
title = {A generalization of the {H}ayne-type estimator as an application of line intercept sampling},
journal = {Biometrics},
year = {1979},
volume = {35},
pages = {743--748}
}
|
|||||
| Devy, M. S., Ganesh, T. & Davidar, P. | 1998 | Patterns of butterfly distribution in the Andaman islands: implications for conservation [BibTeX] |
Acta Oecologica 19:527--534 | ||
BibTeX:
@article{Devetal98,
author = {Devy, M. S. and Ganesh, T. and Davidar, P.},
title = {Patterns of butterfly distribution in the {A}ndaman islands: implications for conservation},
journal = {Acta Oecologica},
year = {1998},
volume = {19},
pages = {527--534}
}
|
|||||
| DeYoung, C. A., Guthery, F. S., Beasom, S. L., Coughlin, S. P. & Heffelfinger, J. R. | 1989 | Improving estimates of white-tailed deer abundance from helicopter surveys [BibTeX] |
Wildlife Society Bulletin 17:275--279 | ||
BibTeX:
@article{Deyetal89,
author = {DeYoung, C. A. and Guthery, F. S. and Beasom, S. L. and Coughlin, S. P. and Heffelfinger, J. R.},
title = {Improving estimates of white-tailed deer abundance from helicopter surveys},
journal = {Wildlife Society Bulletin},
year = {1989},
volume = {17},
pages = {275--279}
}
|
|||||
| Dick, D. M. & Hines, E. M. | 2011 | Using distance sampling techniques to estimate bottlenose dolphin (Tursiops truncatus) abundance at Turneffe Atoll, Belize [BibTeX] |
Marine Mammal Science 27:606--621 | DOI URL | |
BibTeX:
@article{MMS:MMS435,
author = {Dick, Dorothy M. and Hines, Ellen M.},
title = {Using distance sampling techniques to estimate bottlenose dolphin (Tursiops truncatus) abundance at Turneffe Atoll, Belize},
journal = {Marine Mammal Science},
publisher = {Blackwell Publishing Inc},
year = {2011},
volume = {27},
number = {3},
pages = {606--621},
url = {http://dx.doi.org/10.1111/j.1748-7692.2010.00435.x},
doi = {10.1111/j.1748-7692.2010.00435.x}
}
|
|||||
| Dickinson, H. & Fa, J. | 2000 | Abundance, demographics and body condition of a translocated population of St Lucia whiptail lizards (Cnemidophorus vanzoi) | Journal of Zoology 251:187--197 | ||
| Abstract: The whiptail lizard Cnemidophorus vanzoi is a large-bodied teiid found only on two islands (Maria Major and Maria Minor), off St Lucia, West Indies. In May 1995, 42 lizards from Maria Major were introduced to the smaller uninhabited Praslin Island on the same coastline. Three years post-release, we studied abundance, demography and morphometrics of the translocated lizard population, during a 6-month period covering wet and dry seasons. Age, sex, snout-vent length (SVL), body mass (BM), tail length, tail regeneration, and overall condition (moulting, reproductive condition, cuts, external parasites) of 107 animals caught during the study are analysed in the present paper. Comparisons are also made with the source population. A body condition index (CI (BM/SVL)), sex ratio (adult males: adult females), age ratio (adults: juveniles), and sexual size dimorphism ratio (SVL adult male: SVL adult females) were calculated for the study population. Distance sampling and mark-re-sight surveys were used to estimate population size and lizard density. A total of 155 ± 26 individuals were estimated. The lizard population was found to have a high growth rate (r = 0.97-3.95). There were significant seasonal changes in lizard abundance. Seasonal differences in lizard numbers, BM and CI suggest either severe resource limitation during the dry season, or selective aestivation. A high frequency of tail autotomy may point to intense intraspecific competition as the island is relatively free from main predators such as the black rat Rattus rattus. Sex ratio, sexual size dimorphism and sexual dichromatism all indicate a territorial species in a generally non-territorial family (Teiidae). Some adult males seem to maintain juvenile colours. It is suggested that the introduced population has successfully colonized its new environment and that no significant change in the animals condition or size has occurred during the 3 years since translocation. | |||||
BibTeX:
@article{Dickinson2000,
author = {Dickinson, H.C. and Fa, J.E.},
title = {Abundance, demographics and body condition of a translocated population of St Lucia whiptail lizards \textit{(Cnemidophorus vanzoi)}},
journal = {Journal of Zoology},
year = {2000},
volume = {251},
number = {2},
pages = {187--197}
}
|
|||||
| Diefenbach, D. R., Brauning, D. W. & Mattice, J. A. | 2003 | Variability in grassland bird counts related to observer differences and species detection rates | The Auk 120:1168--1179 | ||
| Abstract: Differences among observers in ability to detect and identify birds has been long recognized as a potential source of error when surveying terrestrial birds. However, few published studies address that issue in their methods or study design. We used distance sampling with line transects to investigate differences in detection probabilities among observers and among three species of grassland songbirds: Henslow's Sparrow (Ammodramus henslowii), Grasshopper Sparrow (A. savannarum), and Savannah Sparrow (Passerculus sandwichensis). Our review of 75 papers published in 1985-2001 found that the most commonly used methods were fixed-width transects (31%, 23 papers) and fixed-radius point counts (20%, 15 papers). The median half-width of fixed-width strip transects used by researchers was 50 m, but our results indicated detection probabilities were <1.0 at distances >25 m for most observers and species. Beyond 50 m from the transect line, we found that as many as 60% of birds were missed by observers and that the proportion missed differed among observers and species. Detection probabilities among observers ranged from 0.43 to 1.00 for Henslow's Sparrow, from 0.44 to 0.66 for Grasshopper Sparrow, and from 0.60 to 0.72 for Grasshopper Sparrow for birds detected within 58-100 m of the transect line. Using our estimates of detection probabilities for Henslow's Sparrows among six observers in a computer simulation of a monitoring program, we found that bird counts from fixed-width transects required an additional 2-3 years of monitoring to detect a given decline in abundance compared to density estimates that used a method to correct for missed birds. We recommend that researchers employ survey methods that correct for detection probabilities <1.0. | |||||
BibTeX:
@article{Diefenbach2003,
author = {Diefenbach, D. R. and Brauning, D. W. and Mattice, J. A.},
title = {Variability in grassland bird counts related to observer differences and species detection rates},
journal = {The Auk},
year = {2003},
volume = {120},
number = {4},
pages = {1168--1179}
}
|
|||||
| Diefenbach, D. R., Finley, J. C., Luloff, A. E., Stedman, R., Swope, C. B., Zinn, H. C. & San Julian, G. J. | 2005 | Bear and deer hunter density and distribution on public land in Pennsylvania [BibTeX] |
Human Dimensions of Wildlife 10:201--212 | ||
| Review: Really nice data recording device Interesting case of use of distance for human populations |
|||||
BibTeX:
@article{Dieetal05,
author = {Diefenbach, D R and Finley, J C and Luloff, A E and Stedman, R and Swope, C B and Zinn, H C and San Julian, G J},
title = {Bear and deer hunter density and distribution on public land in {P}ennsylvania},
journal = {Human Dimensions of Wildlife},
year = {2005},
volume = {10},
pages = {201--212}
}
|
|||||
| Diefenbach, D. R., Marshal, M. R., Mattice, J. A. & Brauning, D. W. | 2007 | Incorporating availability for detection in estimates of bird abundance [BibTeX] |
The Auk 124: | ||
| Review: Very interesting, practical example showing how density estimates might be biased low if availability is ignored | |||||
BibTeX:
@article{Dieetal07,
author = {Diefenbach, D. R. and Marshal, M. R. and Mattice, J. A. and Brauning, D. W.},
title = {Incorporating availability for detection in estimates of bird abundance},
journal = {The Auk},
year = {2007},
volume = {124},
number = {1}
}
|
|||||
| Diggle, P. J. | 1977 | A note on robust density estimation for spatial point patterns [BibTeX] |
Biometrika 64:91--95 | ||
BibTeX:
@article{Dig77,
author = {Diggle, P. J.},
title = {A note on robust density estimation for spatial point patterns},
journal = {Biometrika},
year = {1977},
volume = {64},
pages = {91--95}
}
|
|||||
| Diggle, P. J. | 1975 | Robust density estimation using distance methods [BibTeX] |
Biometrika 62:39--48 | ||
BibTeX:
@article{Dig75,
author = {Diggle, P. J.},
title = {Robust density estimation using distance methods},
journal = {Biometrika},
year = {1975},
volume = {62},
pages = {39--48}
}
|
|||||
| Dique, D., De Villiers, D. & Preece, H. | 2003 | Evaluation of line-transect sampling for estimating koala abundance in the Pine Rivers Shire, south-east Queensland | Wildlife Research 30:127--133 | ||
| Abstract: Distance sampling using line transects has not been previously used or tested for estimating koala abundance. In July 2001, a pilot survey was conducted to compare the use of line transects with strip transects for estimating koala abundance. Both methods provided a similar estimate of density. On the basis of the results of the pilot survey, the distribution and abundance of koalas in the Pine Rivers Shire, south-east Queensland, was determined using line-transect sampling. In total, 134 lines (length 64 km) were used to sample bushland areas. Eighty-two independent koalas were sighted. Analysis of the frequency distribution of sighting distances using the software program DISTANCE enabled a global detection function to be estimated for survey sites in bushland areas across the Shire. Abundance in urban parts of the Shire was estimated from densities obtained from total counts at eight urban sites that ranged from 26 to 51 ha in size. Koala abundance in the Pine Rivers Shire was estimated at 4584 (95% confidence interval, 4040-5247). Line-transect sampling is a useful method for estimating koala abundance provided experienced koala observers arc used when conducting surveys. | |||||
BibTeX:
@article{Dique2003,
author = {Dique, D.S. and De Villiers, D.L. and Preece, H.J.},
title = {Evaluation of line-transect sampling for estimating koala abundance in the Pine Rivers Shire, south-east Queensland},
journal = {Wildlife Research},
year = {2003},
volume = {30},
number = {2},
pages = {127--133}
}
|
|||||
| Dique, D., Preece, H. & de Villliers, D. | 2003 | Koalas in Pine Rivers Shire: distribution, abundance and management [BibTeX] |
: | ||
BibTeX:
@techreport{Dique2003b,
author = {Dique, D. and Preece, H. and de Villliers, D.},
title = {Koalas in Pine Rivers Shire: distribution, abundance and management},
year = {2003}
}
|
|||||
| DiTraglia, F. J. | 2007 | Models of random wildlife movement with an application to distance sampling [BibTeX] |
: | ||
BibTeX:
@mastersthesis{DiTraglia2007,
author = {Francis J. DiTraglia},
title = {Models of random wildlife movement with an application to distance sampling},
school = {University of St Andrews},
year = {2007}
}
|
|||||
| Dobkin, D. S. & Rich, A. C. | 1998 | Comparison of line transect, spot map, and point count surveys for birds in riparian habitats of the Great Basin [BibTeX] |
Journal of Field Ornithology 69:430--443 | ||
BibTeX:
@article{DobRic98,
author = {Dobkin, D. S. and Rich, A. C.},
title = {Comparison of line transect, spot map, and point count surveys for birds in riparian habitats of the {G}reat {B}asin},
journal = {Journal of Field Ornithology},
year = {1998},
volume = {69},
pages = {430--443}
}
|
|||||
| Dodd, C. K. | 1990 | Line transect estimation of Red Hills salamander burrow density using a Fourier series [BibTeX] |
Copeia :555--557 | ||
BibTeX:
@article{Dod90,
author = {Dodd, C. K.},
title = {Line transect estimation of {R}ed {H}ills salamander burrow density using a {F}ourier series},
journal = {Copeia},
year = {1990},
pages = {555--557}
}
|
|||||
| Dohl, T. P., Bonnell, M. L. & Ford, R. G. | 1986 | Distribution and abundance of common dolphin, Delphinus delphis, in the Southern California Bight: a quantitative assessment based upon aerial transect data [BibTeX] |
Fishery Bulletin 84:333--343 | ||
BibTeX:
@article{Dohetal,
author = {Dohl, T. P. and Bonnell, M. L. and Ford, R. G.},
title = {Distribution and abundance of common dolphin, \emph{{D}elphinus delphis}, in the {S}outhern {C}alifornia {B}ight: a quantitative assessment based upon aerial transect data},
journal = {Fishery Bulletin},
year = {1986},
volume = {84},
pages = {333--343}
}
|
|||||
| Doi, T. | 1974 | Further development of whale sighting theory [BibTeX] |
The Whale Problem: a Status Report :359--368 | ||
BibTeX:
@incollection{Doi74,
author = {Doi, T.},
title = {Further development of whale sighting theory},
booktitle = {The Whale Problem: a Status Report},
publisher = {Harvard University Press},
year = {1974},
pages = {359--368}
}
|
|||||
| Doi, T. | 1971 | Further development of sighting theory on whales [BibTeX] |
Bulletin of Tokai Regional Fisheries Research Laboratory 68:1--22 | ||
BibTeX:
@article{Doi71,
author = {Doi, T.},
title = {Further development of sighting theory on whales},
journal = {Bulletin of Tokai Regional Fisheries Research Laboratory},
year = {1971},
volume = {68},
pages = {1--22}
}
|
|||||
| Doi, T., Kasamatsu, F. & Nakano, T. | 1983 | Further simulation studies on sighting by introducing both concentration of sighting effort by angle and aggregations of minke whales in the Antarctic [BibTeX] |
Report of the International Whaling Commission 33:403--412 | ||
BibTeX:
@article{Doietal83,
author = {Doi, T. and Kasamatsu, F. and Nakano, T.},
title = {Further simulation studies on sighting by introducing both concentration of sighting effort by angle and aggregations of minke whales in the {A}ntarctic},
journal = {Report of the International Whaling Commission},
year = {1983},
volume = {33},
pages = {403--412}
}
|
|||||
| Doi, T., Kasamatsu, F. & Nakano, T. | 1982 | A simulation study on sighting survey of minke whales in the Antarctic [BibTeX] |
Report of the International Whaling Commission 32:919--928 | ||
BibTeX:
@article{Doietal82,
author = {Doi, T. and Kasamatsu, F. and Nakano, T.},
title = {A simulation study on sighting survey of minke whales in the {A}ntarctic},
journal = {Report of the International Whaling Commission},
year = {1982},
volume = {32},
pages = {919--928}
}
|
|||||
| Donadio, E., Di Martino, S., Aubone, M. & Novaro, A. J. | 2004 | Feeding ecology of the Andean hog-nosed skunk (Conepatus chinga) in areas under different land use in north-western Patagonia [BibTeX] |
Journal of Arid Environments 56:709--718 | ||
BibTeX:
@article{Donadio2004,
author = {Donadio, E. and Di Martino, S. and Aubone, M. and Novaro, A. J.},
title = {Feeding ecology of the {A}ndean hog-nosed skunk (\textit{Conepatus chinga}) in areas under different land use in north-western {P}atagonia},
journal = {Journal of Arid Environments},
year = {2004},
volume = {56},
number = {4},
pages = {709--718}
}
|
|||||
| Drummer, T. D. | 1999 | Planning abundance estimation surveys when detectability is $<$1.0 [BibTeX] |
Marine Mammal Survey and Assessment Methods :67--73 | ||
BibTeX:
@incollection{Dru99,
author = {Drummer, T. D.},
title = {Planning abundance estimation surveys when detectability is $<$1.0},
booktitle = {Marine Mammal Survey and Assessment Methods},
publisher = {Balkema},
year = {1999},
pages = {67--73}
}
|
|||||
| Drummer, T. D. | 1997 | Size-bias in line transect sampling [BibTeX] |
: | ||
BibTeX:
@phdthesis{Dru85,
author = {Drummer, T. D.},
title = {Size-bias in line transect sampling},
school = {University of Wyoming},
year = {1997},
number = {Laramie, WY, USA}
}
|
|||||
| Drummer, T. D. | 1991 | SIZETRAN: analysis of size-biased line transect data [BibTeX] |
Wildlife Society Bulletin 19:117--118 | ||
BibTeX:
@article{Dru91,
author = {Drummer, T. D.},
title = {SIZETRAN: analysis of size-biased line transect data},
journal = {Wildlife Society Bulletin},
year = {1991},
volume = {19},
pages = {117--118}
}
|
|||||
| Drummer, T. D. | 1990 | Estimation of proportions and ratios from line transect data [BibTeX] |
Communications in Statistics --- Theory and Methods 19:3069--3091 | ||
BibTeX:
@article{Dru90,
author = {Drummer, T. D.},
title = {Estimation of proportions and ratios from line transect data},
journal = {Communications in Statistics --- Theory and Methods},
year = {1990},
volume = {19},
pages = {3069--3091}
}
|
|||||
| Drummer, T. D., Degange, A. R., Pank, L. L. & McDonald, L. L. | 1990 | Adjusting for group size influence in line transect sampling [BibTeX] |
Journal of Wildlife Management 54:511--514 | ||
BibTeX:
@article{Druetal90,
author = {Drummer, T. D. and Degange, A. R. and Pank, L. L. and McDonald, L. L.},
title = {Adjusting for group size influence in line transect sampling},
journal = {Journal of Wildlife Management},
year = {1990},
volume = {54},
pages = {511--514}
}
|
|||||
| Drummer, T. D. & McDonald, L. L. | 1987 | Size bias in line transect sampling [BibTeX] |
Biometrics 43:13--21 | ||
BibTeX:
@article{DruMcD87,
author = {Drummer, T. D. and McDonald, L. L.},
title = {Size bias in line transect sampling},
journal = {Biometrics},
year = {1987},
volume = {43},
pages = {13--21}
}
|
|||||
| Du Fresne, S., Fletcher, D. & Sawson, S. | 2006 | The effect of line-transect placement in a coastal distance sampling survey [BibTeX] |
Journal of Cetacean Research and Management 8:79--85 | ||
BibTeX:
@article{Du2006,
author = {Du Fresne, S. and Fletcher, D. and Sawson, S.},
title = {The effect of line-transect placement in a coastal distance sampling survey},
journal = {Journal of Cetacean Research and Management},
year = {2006},
volume = {8},
pages = {79--85}
}
|
|||||
| Duffy, D. C. & Schneider, D. C. | 1984 | A comparison of two transect methods of counting birds at sea [BibTeX] |
Cormorant 12:95--98 | ||
BibTeX:
@article{DufSch84,
author = {Duffy, D. C. and Schneider, D. C.},
title = {A comparison of two transect methods of counting birds at sea},
journal = {Cormorant},
year = {1984},
volume = {12},
pages = {95--98}
}
|
|||||
| Dunn, E. H., Bart, J., Collins, B. T., Craig, B., Dale, B., Downes, C. M., Francis, C. M., Woodley, S. & Zorn, P. | 2006 | Monitoring bird populations in small geographic areas [BibTeX] |
: | ||
BibTeX:
@techreport{Dunn2006,
author = {Erica H. Dunn and Jon Bart and Brian T. Collins and Brian Craig and Brenda Dale and Connie M. Downes and Charles M. Francis and Stephen Woodley and Paul Zorn},
title = {Monitoring bird populations in small geographic areas},
year = {2006}
}
|
|||||
| Durant, S. M., Craft, M. E., Hilborn, R., Bashir, S., Hando, J. & Thomas, L. | 2011 | Long-term trends in carnivore abundance using distance sampling in Serengeti National Park, Tanzania [BibTeX] |
Journal of Applied Ecology 48:1490--1500 | DOI URL | |
BibTeX:
@article{Durant2011,
author = {Durant, Sarah M. and Craft, Meggan E. and Hilborn, Ray and Bashir, Sultana and Hando, Justin and Thomas, Len},
title = {Long-term trends in carnivore abundance using distance sampling in Serengeti National Park, Tanzania},
journal = {Journal of Applied Ecology},
publisher = {Blackwell Publishing Ltd},
year = {2011},
volume = {48},
pages = {1490--1500},
url = {http://dx.doi.org/10.1111/j.1365-2664.2011.02042.x},
doi = {10.1111/j.1365-2664.2011.02042.x}
}
|
|||||
| Dörgeloh, W. G. | 2005 | Density estimates of francolin in a Sporobolus ioclados-Acacia tortilis Savanna using distance sampling | South African Journal of Wildlife Research 35:89--94 | ||
| Abstract: The status and ecology of francolin in the savanna biome has not been studied extensively. The objective of this study was to determine the applicability of the line transect method to estimate population densities of three francolin species, Swainson's spurfowl, crested and Natal francolin. Surveys were conducted in Sporobolus ioclados-Acacia tortilis Savanna in the Nylsvley Nature Reserve. Relative species composition showed 75.7% Swainson's spurfowl, 16.9% crested and 7.4% Natal francolin. Early morning counts within two hours of sunrise, when temperatures are low and with no wind or cloud cover, revealed the best results. Detectability was estimated as 85.6%. The Uniform Simple polynomial model was selected based on the lowest Akaike's Information Criterion (AIC) values. Population density of all three species combined was estimated as 6.76 francolin/ha with an encounter rate of 32.24 francolin/km. A coefficient of variation of 23.57% and a poor model fit (AIC 1650.28; GOF i^2 P = 0.024) indicated that the line transect method may not be a suitable method to count francolin in this plant community. However, this method may be improved to some extent by including additional lines to increase replication, stratifying the study area into low- and high-density units, and including the adjacent Nyl floodplain into the survey. This study suggests a need to improve the line transect method and to investigate other counting techniques to assist in monitoring these species. | |||||
BibTeX:
@article{Dorgeloh2005,
author = {D{\"o}rgeloh, W. G.},
title = {Density estimates of francolin in a \textit{Sporobolus ioclados-Acacia tortilis} {S}avanna using distance sampling},
journal = {South African Journal of Wildlife Research},
year = {2005},
volume = {35},
number = {1},
pages = {89--94}
}
|
|||||
| Eberhardt, L. L. | 1979 | Line-transects based on right-angle distances [BibTeX] |
Journal of Wildlife Management 43:768--774 | ||
BibTeX:
@article{Ebe79,
author = {Eberhardt, L. L.},
title = {Line-transects based on right-angle distances},
journal = {Journal of Wildlife Management},
year = {1979},
volume = {43},
pages = {768--774}
}
|
|||||
| Eberhardt, L. L. | 1978 | Transect methods for population studies [BibTeX] |
Journal of Wildlife Management 42:1--31 | ||
BibTeX:
@article{Ebe78,
author = {Eberhardt, L. L.},
title = {Transect methods for population studies},
journal = {Journal of Wildlife Management},
year = {1978},
volume = {42},
pages = {1--31}
}
|
|||||
| Eberhardt, L. L. | 1978 | Appraising variability in population studies [BibTeX] |
Journal of Wildlife Management 42:207--238 | ||
BibTeX:
@article{Ebe78b,
author = {Eberhardt, L. L.},
title = {Appraising variability in population studies},
journal = {Journal of Wildlife Management},
year = {1978},
volume = {42},
pages = {207--238}
}
|
|||||
| Eberhardt, L. L. | 1968 | A preliminary appraisal of line transect [BibTeX] |
Journal of Wildlife Management 32:82--88 | ||
BibTeX:
@article{Ebe68,
author = {Eberhardt, L. L.},
title = {A preliminary appraisal of line transect},
journal = {Journal of Wildlife Management},
year = {1968},
volume = {32},
pages = {82--88}
}
|
|||||
| Eberhardt, L. L. | 1967 | Some developments in `distance sampling'. [BibTeX] |
Biometrics 23:207--216 | ||
BibTeX:
@article{Eberhardt1967,
author = {Eberhardt, L. L.},
title = {Some developments in `distance sampling'.},
journal = {Biometrics},
year = {1967},
volume = {23},
number = {2},
pages = {207--216}
}
|
|||||
| Eberhardt, L. L., Chapman, D. G. & Gilbert, J. R. | 1979 | A review of marine mammal census methods [BibTeX] |
Wildlife Monographs 63:1--46 | ||
BibTeX:
@article{Ebeetal79,
author = {Eberhardt, L. L. and Chapman, D. G. and Gilbert, J. R.},
title = {A review of marine mammal census methods},
journal = {Wildlife Monographs},
year = {1979},
volume = {63},
pages = {1--46}
}
|
|||||
| Edwards, D. K., Dorsey, G. L. & Crawford, J. A. | 1981 | A comparison of three avian census methods [BibTeX] |
Estimating Numbers of Terrestrial Birds :170--176 | ||
BibTeX:
@incollection{Edwetal81,
author = {Edwards, D. K. and Dorsey, G. L. and Crawford, J. A.},
title = {A comparison of three avian census methods},
booktitle = {Estimating Numbers of Terrestrial Birds},
publisher = {Cooper Ornithological Society},
year = {1981},
number = {6},
pages = {170--176}
}
|
|||||
| Efford, M. | 2008 | Book Review: Advanced Distance Sampling. Estimating Abundance of Biological Populations [BibTeX] |
Environmental Conservation 35:187--192 | ||
BibTeX:
@article{Efford2008,
author = {Murray Efford},
title = {Book Review: Advanced Distance Sampling. Estimating Abundance of Biological Populations},
journal = {Environmental Conservation},
year = {2008},
volume = {35},
pages = {187--192}
}
|
|||||
| Efford, M. G. | 2004 | Density estimation in live-trapping studies [BibTeX] |
Oikos 106:598--610 | ||
BibTeX:
@article{Efford2004a,
author = {Efford, M. G},
title = {Density estimation in live-trapping studies},
journal = {Oikos},
year = {2004},
volume = {106},
pages = {598--610}
}
|
|||||
| Efford, M. G. & Dawson, D. K. | 2009 | Effect of distance-related heterogeneity on population size estimates from point counts [BibTeX] |
The Auk 126:100--111 | ||
BibTeX:
@article{Efford2009,
author = {Murray G. Efford and Deanna K. Dawson},
title = {Effect of distance-related heterogeneity on population size estimates from point counts},
journal = {The Auk},
year = {2009},
volume = {126},
pages = {100--111}
}
|
|||||
| Efford, M. G., Dawson, D. K. & Robbins, C. S. | 2004 | DENSITY: software for analysing capture-recapture data from passive detector arrays [BibTeX] |
Animal Biodiversity and Conservation 27:217--228 | ||
BibTeX:
@article{Efford2004,
author = {Efford, M. G. and Dawson, D. K. and Robbins, C. S.},
title = {{DENSITY}: software for analysing capture-recapture data from passive detector arrays},
journal = {Animal Biodiversity and Conservation},
year = {2004},
volume = {27},
pages = {217--228}
}
|
|||||
| Efford, M. G., Warburton, B., Coleman, M. C. & Barker, R. J. | 2005 | A field test of two methods for density estimation [BibTeX] |
Wildlife Society Bulletin 33:731--738 | ||
BibTeX:
@article{Efford2005,
author = {Efford, M G and Warburton, B and Coleman, M C and Barker, R J},
title = {A field test of two methods for density estimation},
journal = {Wildlife Society Bulletin},
year = {2005},
volume = {33},
pages = {731--738}
}
|
|||||
| Eidous, O. | 2006 | A Semiparametric Model for Line Transect Sampling [BibTeX] |
Communications in Statistics - Theory and Methods 35:1211 - 1221 | ||
| Review: Neste paper o autor apresenta um estimador semi paramétrico com base em kernels + um modelo paramétrico (half-normal). Tem um certo paralelismo com o key+series adjustments a que estou habituado. O estimador apresentado é, regra geral, menos enviesado e mais eficiente que o estimador kernel tradicional, embora não sejam feitas comparações em situações em que o modelo verdadeiro da função de detecção é conhecido - note-se no entanto, e o autor refere isso mesmo, que não é facil comparar um estimador deste genero com um em que a forma da função de detecção verdadeira seja conhecida, pois nesse caso o simples modelo paramétrico verdadeiro deverá sempre ser melhor que qualquer outro método. | |||||
BibTeX:
@article{Eidous2006,
author = {Omar Eidous},
title = {A Semiparametric Model for Line Transect Sampling},
journal = {Communications in Statistics - Theory and Methods},
year = {2006},
volume = {35},
pages = {1211 - 1221}
}
|
|||||
| Eidous, O. M. | 2005 | Bias correction for histogram estimator using line transect sampling [BibTeX] |
Environmetrics 16:61--69 | ||
BibTeX:
@article{Eidous2005,
author = {Omar M. Eidous},
title = {Bias correction for histogram estimator using line transect sampling},
journal = {Environmetrics},
year = {2005},
volume = {16},
pages = {61--69}
}
|
|||||
| Eidous, O. M. | 2005 | Histogram and polygon methods using line transect sampling [BibTeX] |
Journal of Applied Statistical Science 14:25--36 | ||
BibTeX:
@article{Eidous2005a,
author = {Omar M. Eidous},
title = {Histogram and polygon methods using line transect sampling},
journal = {Journal of Applied Statistical Science},
year = {2005},
volume = {14},
pages = {25--36}
}
|
|||||
| Eidous, O. M. | 2005 | On improving kernel estimators using line transect sampling. [BibTeX] |
Communications in Statistics - Theory and Methods 34:931-941 | ||
BibTeX:
@article{Eidous2005b,
author = {Eidous, O. M.},
title = {On improving kernel estimators using line transect sampling.},
journal = {Communications in Statistics - Theory and Methods},
year = {2005},
volume = {34},
pages = {931-941}
}
|
|||||
| Ekblom, R. | 2010 | Evaluation of the analysis of distance sampling data: a simulation study [BibTeX] |
Ornis Svecica 20:45--53 | ||
BibTeX:
@article{EKBLOM2010,
author = {Robert Ekblom},
title = {Evaluation of the analysis of distance sampling data: a simulation study},
journal = {Ornis Svecica},
year = {2010},
volume = {20},
pages = {45--53}
}
|
|||||
| Ellingson, A. R. & Lukacs, P. M. | 2003 | Improving methods for regional landbird monitoring: a reply to Hutto and Young [BibTeX] |
Wildlife Society Bulletin 31:896--902 | ||
BibTeX:
@article{EliLuk03,
author = {Ellingson, A R and Lukacs, P M},
title = {Improving methods for regional landbird monitoring: a reply to {H}utto and {Y}oung},
journal = {Wildlife Society Bulletin},
year = {2003},
volume = {31},
pages = {896--902}
}
|
|||||
| Ellis, A. M. & Bernard, R. T. F. | 2005 | Estimating the density of kudu (Tragelaphus strepsiceros) in subtropical thicket using line transect surveys of dung and DISTANCE software | African Journal of Ecology 43:362-368(7) | DOI URL | |
| Abstract: Many ecotourism reserves in the Eastern Cape Province of South Africa have introduced large carnivores which prey on ungulates such as kudu. Kudu occupy thick vegetation and helicopter-based counts are not appropriate. In this study we tested line transect counts of faecal pellets in conjunction with DISTANCE analysis as a method for assessing the abundance of kudu. Transects were undertaken in three regions of two game reserves and the results compared with helicopter based game counts (for two regions) and a known kudu population in the third region (an enclosed breeding centre). Estimates of kudu abundance were two to three times greater than the helicopter counts, but within the known number of kudu in the breeding centre. The increased accuracy in the breeding centre was probably because the transects covered a greater percentage of the available habitat (0.07%) than in the reserves (approximately 0.007%). We suggest that DISTANCE software and line transects counts of pellet groups can be used for kudu and probably for other ungulates in thicket-type vegetations. Accuracy will depend on the percentage of the available habitat that is surveyed and on the accuracy of the defecation and decay rates. | |||||
BibTeX:
@article{Ellis&Bernard2005,
author = {Ellis, Amanda M. and Bernard, Richard T. F.},
title = {Estimating the density of kudu {(\textit{Tragelaphus strepsiceros}) in subtropical thicket using line transect surveys of dung and DISTANCE software}},
journal = {African Journal of Ecology},
year = {2005},
volume = {43},
pages = {362-368(7)},
url = {http://www.ingentaconnect.com/content/bsc/afje/2005/00000043/00000004/art00011},
doi = {doi:10.1111/j.1365-2028.2005.00591.x}
}
|
|||||
| Elphick, C. S. | 2008 | How you count counts: the importance of methods research in applied ecology [BibTeX] |
Journal of Applied Ecology 45:1313--1320 | ||
BibTeX:
@article{Elphick2008,
author = {Chris S. Elphick},
title = {How you count counts: the importance of methods research in applied ecology},
journal = {Journal of Applied Ecology},
year = {2008},
volume = {45},
pages = {1313--1320}
}
|
|||||
| Emlen, J. T. | 1977 | Estimating breeding season bird densities from transect counts [BibTeX] |
The Auk 94:455--468 | ||
BibTeX:
@article{Eml77,
author = {Emlen, J. T.},
title = {Estimating breeding season bird densities from transect counts},
journal = {The Auk},
year = {1977},
volume = {94},
pages = {455--468}
}
|
|||||
| Emlen, J. T. | 1971 | Population densities of birds derived from transect counts [BibTeX] |
The Auk 88:323--342 | ||
BibTeX:
@article{Eml71,
author = {Emlen, J. T.},
title = {Population densities of birds derived from transect counts},
journal = {The Auk},
year = {1971},
volume = {88},
pages = {323--342}
}
|
|||||
| Emlen, J. T. & DeJong, M. J. | 1981 | The application of song detection threshold distance to census operations [BibTeX] |
Estimating Numbers of Terrestrial Birds :346--352 | ||
BibTeX:
@incollection{EmlDej81,
author = {Emlen, J. T. and DeJong, M. J.},
title = {The application of song detection threshold distance to census operations},
booktitle = {Estimating Numbers of Terrestrial Birds},
publisher = {Cooper Ornithological Society},
year = {1981},
number = {6},
pages = {346--352}
}
|
|||||
| Engeman, R., Nielson, R. & Sugihara, R. | 2005 | Evaluation of optimized variable area transect sampling using totally enumerated field data sets | Environmetrics 16:767--772 | ||
| Abstract: Plotless density estimators (PDEs) can be efficient alternatives to quadrat sampling for estimating the density of stationary objects. Variable area transect (VAT) sampling had been identified, and optimized relative to effort, in previous Monte Carlo simulated population studies as a low-labor field method that demonstrated superior estimation properties among many PDEs considered. However, natural populations tend to be much more complex and less predictable in spatial distribution than computer generated populations. Therefore, we carried out a Monte Carlo simulation study that used 17 fully enumerated field populations rather than simulated populations. These natural populations represented a variety of population densities and spatial patterns. We focused on assessing the effect of the number of population members searched for along each transect (r), sample size, and transect width on estimation quality. Using relative root mean-squared error and relative bias as criteria, the optimal range for r was 5 to 7 population members encountered from each start point. Sample size was best if n > 20, but returns in estimation quality diminished by n = 40. Transect width was previously uninvestigated and found to be the most important design factor affecting estimation quality. Field studies should strive for transects as wide as logistically reasonable. | |||||
BibTeX:
@article{Engeman2005,
author = {Engeman, R.M. and Nielson, R.M. and Sugihara, R.T.},
title = {Evaluation of optimized variable area transect sampling using totally enumerated field data sets},
journal = {Environmetrics},
year = {2005},
volume = {16},
number = {7},
pages = {767--772}
}
|
|||||
| Ensign, W. E., Angermeier, P. L. & Dolloff, C. A. | 1995 | Use of line transect methods to estimate abundance of benthic stream fishes | Canadian Journal of Fisheries & Aquatic Sciences 52:213--222 | ||
| Abstract: Examination of the distribution of sighting distances for the Roanoke darter Percina roanoka, Roanoke logperch P. rex and black jumprock Moxostoma cervinum indicates that strip transect sighting models that assume probability of sighting remaining constant out to the limits of observer visibility are not appropriate for these benthic species. Distance sampling models that assume decreased sighting probability with increasing distance of the target from the observer provide a reasonable alternative to strip transect sighting models. -from Authors | |||||
BibTeX:
@article{Ensign1995,
author = {Ensign, W. E. and Angermeier, P. L. and Dolloff, C. A.},
title = {Use of line transect methods to estimate abundance of benthic stream fishes},
journal = {Canadian Journal of Fisheries \& Aquatic Sciences},
year = {1995},
volume = {52},
number = {1},
pages = {213--222}
}
|
|||||
| Epperly, S. P., Braun, J. & Chester, A. J. | 1995 | Aerial surveys for sea turtles in North Carolina inshore waters [BibTeX] |
Fishery Bulletin 93:254--261 | ||
BibTeX:
@article{Eppetal95,
author = {Epperly, S. P. and Braun, J. and Chester, A. J.},
title = {Aerial surveys for sea turtles in {N}orth {C}arolina inshore waters},
journal = {Fishery Bulletin},
year = {1995},
volume = {93},
pages = {254--261}
}
|
|||||
| Erickson, A. W., Siniff, D. B. & Harwood, J. | 1993 | Estimation of population sizes [BibTeX] |
Antarctic Seals: Research Methods and Techniques :29--45 | ||
BibTeX:
@incollection{Erietal93,
author = {Erickson, A. W. and Siniff, D. B. and Harwood, J.},
title = {Estimation of population sizes},
booktitle = {Antarctic Seals: Research Methods and Techniques},
publisher = {Cambridge University Press},
year = {1993},
pages = {29--45}
}
|
|||||
| Erwin, R. M. | 1982 | Observer variability in estimating numbers: an experiment [BibTeX] |
Journal of Field Ornithology 53:159--167 | ||
BibTeX:
@article{Erw82,
author = {Erwin, R. M.},
title = {Observer variability in estimating numbers: an experiment},
journal = {Journal of Field Ornithology},
year = {1982},
volume = {53},
pages = {159--167}
}
|
|||||
| Erxleben, D., Butler, M., Ballard, W., Wallace, M., Hardin, J. & Demaso, S. | 2010 | Encounter rates from road-based surveys of Rio Grande wild turkeys in Texas [BibTeX] |
The Journal of Wildlife Management 74:1134-1140 | ||
BibTeX:
@article{Erxleben2010,
author = {Erxleben, D.R. and Butler, M.J. and Ballard, W.B. and Wallace, M.C. and Hardin, J.B. and Demaso, S.J.},
title = {Encounter rates from road-based surveys of Rio Grande wild turkeys in Texas},
journal = {The Journal of Wildlife Management},
year = {2010},
volume = {74},
pages = {1134-1140}
}
|
|||||
| Erxleben, D., Butler, M., Ballard, W., Wallace, M., Peterson, M., Silvy, N., Kuvlesky, W., Hewitt, D., DeMaso, S., Hardin, J. & Dominguez-Brazil, M. | 2011 | Wild Turkey (Meleagris gallopavo) association to roads: implications for distance sampling [BibTeX] |
European Journal of Wildlife Research 57:57-65 | URL | |
BibTeX:
@article{springerlink:10.1007/s10344-010-0399-4,
author = {Erxleben, Devin and Butler, Matthew and Ballard, Warren and Wallace, Mark and Peterson, Markus and Silvy, Nova and Kuvlesky, William and Hewitt, David and DeMaso, Stephen and Hardin, Jason and Dominguez-Brazil, Megan},
title = {Wild Turkey (\textit{Meleagris gallopavo}) association to roads: implications for distance sampling},
journal = {European Journal of Wildlife Research},
publisher = {Springer Berlin / Heidelberg},
year = {2011},
volume = {57},
pages = {57-65},
note = {10.1007/s10344-010-0399-4},
url = {http://dx.doi.org/10.1007/s10344-010-0399-4}
}
|
|||||
| Estades, C. F. & Temple, S. A. | 1999 | Deciduous-forest bird communities in a fragmented landscape dominated by exotic pine plantations [BibTeX] |
Ecological Applications 9:573--585 | ||
BibTeX:
@article{Esttem99,
author = {Estades, C. F. and Temple, S. A.},
title = {Deciduous-forest bird communities in a fragmented landscape dominated by exotic pine plantations},
journal = {Ecological Applications},
year = {1999},
volume = {9},
pages = {573--585}
}
|
|||||
| Estes, J. A. & Gilbert, J. R. | 1978 | Evaluation of an aerial survey of Pacific walruses [BibTeX] |
Journal of the Fisheries Research Board of Canada 35:1130--1140 | ||
BibTeX:
@article{EstGil78,
author = {Estes, J. A. and Gilbert, J. R.},
title = {Evaluation of an aerial survey of {P}acific walruses},
journal = {Journal of the Fisheries Research Board of Canada},
year = {1978},
volume = {35},
pages = {1130--1140}
}
|
|||||
| Evans, B., Ashley, J. & Marsden, S. J. | 2005 | Abundance, habitat use and movements of blue-winged macaws (Primolius maracana) and other parrots in and around an Atlantic forest reserve [BibTeX] |
Wilson Bulletin 117:154--164 | ||
BibTeX:
@article{Evans2005,
author = {Evans, B. and Ashley, J and Marsden, S. J.},
title = {Abundance, habitat use and movements of blue-winged {macaws (\textit{Primolius maracana}) and other parrots in and around an Atlantic forest reserve}},
journal = {Wilson Bulletin},
year = {2005},
volume = {117},
pages = {154--164}
}
|
|||||
| Evans, T. J., Fischbach, A., Schliebe, S., Manly, B., Kalxdorff, S. & York, G. | 2003 | Polar Bear Aerial Survey in the Eastern Chukchi Sea: A Pilot Study [BibTeX] |
Arctic 56:359-366 | ||
BibTeX:
@article{Evans2003,
author = {Thomas J. Evans And Anthony Fischbach And Scott Schliebe And Bryan Manly And Susanne Kalxdorff And Geoff York},
title = {Polar Bear Aerial Survey in the {Eastern Chukchi Sea}: A Pilot Study},
journal = {Arctic},
year = {2003},
volume = {56},
pages = {359-366}
}
|
|||||
| Evans-Mack, D., Raphael, M. G. & Laake, J. L. | 2002 | Probability of detecting marbled murrelets at sea: effects of single versus paired observers [BibTeX] |
Journal of Wildlife Management 66:865--873 | ||
BibTeX:
@article{Evaetal02,
author = {Evans-Mack, D. and Raphael, M. G. and Laake, J. L.},
title = {Probability of detecting marbled murrelets at sea: effects of single versus paired observers},
journal = {Journal of Wildlife Management},
year = {2002},
volume = {66},
pages = {865--873}
}
|
|||||
| Fancy, S. G. | 1997 | A new approach for analyzing bird densities from variable circular-plot counts [BibTeX] |
Pacific Science 51:107--114 | ||
| Review: Tenho um workspace com coisas para implementar esta abordagem - ver pasta amrela Fancy's stuff | |||||
BibTeX:
@article{Fan97,
author = {Fancy, S. G.},
title = {A new approach for analyzing bird densities from variable circular-plot counts},
journal = {Pacific Science},
year = {1997},
volume = {51},
pages = {107--114}
}
|
|||||
| Fancy, S. G., Snetsinger, T. J. & Jacobi, J. D. | 1997 | Translocation of the palila, an endangered Hawaiian honeycreeper [BibTeX] |
Pacific Conservation Biology 3:39--46 | ||
BibTeX:
@article{Fancy1997,
author = {Steven G. Fancy and Thomas J. Snetsinger and James D. Jacobi},
title = {Translocation of the palila, an endangered Hawaiian honeycreeper},
journal = {Pacific Conservation Biology},
year = {1997},
volume = {3},
pages = {39--46}
}
|
|||||
| Farina, A. | 1995 | Distribution and dynamics of birds in a rural sub-Mediterranean landscape [BibTeX] |
Landscape and Urban Planning 31:269--280 | ||
BibTeX:
@article{Far95,
author = {Farina, A.},
title = {Distribution and dynamics of birds in a rural sub-{M}editerranean landscape},
journal = {Landscape and Urban Planning},
year = {1995},
volume = {31},
pages = {269--280}
}
|
|||||
| Farnsworth, G. L., Nichols, J. D., Sauer, J. R., Fancy, S. G., Kenneth, Pollock, H., Shriner, S. A. & Simons, T. R. | 2005 | Statistical Approaches to the Analysis of Point Count Data: A Little Extra Information Can Go a Long Way [BibTeX] |
USDA Forest Service Gen. Tech. Rep. :736-743 | ||
BibTeX:
@techreport{Faretalb02,
author = {George L. Farnsworth and James D. Nichols and John R. Sauer and Steven G. Fancy and Kenneth and H. Pollock and Susan A. Shriner and Theodore R. Simons},
title = {Statistical Approaches to the Analysis of Point Count Data: A Little Extra Information Can Go a Long Way},
journal = {USDA Forest Service Gen. Tech. Rep.},
year = {2005},
number = {PSW-GTR-191},
pages = {736-743}
}
|
|||||
| Farnsworth, G. L., Pollock, K. H., Nichols, J. D., Simons, T. R., Hines, J. E. & Sauer, J. R. | 2002 | A removal model for estimating detection probabilities from point-count surveys [BibTeX] |
The Auk 119:414--425 | ||
BibTeX:
@article{Faretal02,
author = {Farnsworth, G. L. and Pollock, K. H. and Nichols, J. D. and Simons, T. R. and Hines, J. E. and Sauer, J. R.},
title = {A removal model for estimating detection probabilities from point-count surveys},
journal = {The Auk},
year = {2002},
volume = {119},
pages = {414--425}
}
|
|||||
| Fashing, P. J. & Cords, M. | 2000 | Diurnal primate densities and biomass in the Kakamega Forest: an evaluation of census methods and a comparison with other forests [BibTeX] |
American Journal of Primatology 50:139--152 | ||
BibTeX:
@article{FasCor00,
author = {Fashing, P. J. and Cords, M.},
title = {Diurnal primate densities and biomass in the {K}akamega {F}orest: an evaluation of census methods and a comparison with other forests},
journal = {American Journal of Primatology},
year = {2000},
volume = {50},
pages = {139--152}
}
|
|||||
| Faustino, C. E., Silva, M. A., Marques, T. A. & Thomas, L. | 2010 | Designing a shipboard line transect survey to estimate cetacean abundance off the Azores archipelago [BibTeX] |
Arquipelago - Life and Marine Sciences 27:49--58 | ||
BibTeX:
@article{FAUSTINO2010,
author = {Faustino, C. E.S. and M. A. Silva and T. A. Marques and L. Thomas},
title = {Designing a shipboard line transect survey to estimate cetacean abundance off the Azores archipelago},
journal = {Arquipelago - Life and Marine Sciences},
year = {2010},
volume = {27},
pages = {49--58}
}
|
|||||
| Faustino, C. E. S. | 2008 | Designing a shipboard line transect survey to estimate cetacean abundance off the Azores Archipelago, Portugal [BibTeX] |
: | ||
| Review: unrevised version is CFaustino2008.pdf | |||||
BibTeX:
@mastersthesis{Faustino2008,
author = {Cláudia Estevinho Santos Faustino},
title = {Designing a shipboard line transect survey to estimate cetacean abundance off the {Azores Archipelago, Portugal}},
school = {University of St. Andrews},
year = {2008}
}
|
|||||
| Fay, J. M. | 1991 | An elephant (Loxodonta africana) survey using dung counts in the forests of the Central African Republic [BibTeX] |
Journal of Tropical Ecology 7:25--36 | ||
BibTeX:
@article{Fay,
author = {Fay, J. M.},
title = {An elephant (\emph{{L}oxodonta africana}) survey using dung counts in the forests of the {C}entral {A}frican Republic},
journal = {Journal of Tropical Ecology},
year = {1991},
volume = {7},
pages = {25--36}
}
|
|||||
| Fay, J. M. & Agnagna, M. | 1991 | A population survey of forest elephants (Loxodonta africana cyclotis) in northern Congo [BibTeX] |
African Journal of Ecology 29:177--87 | ||
BibTeX:
@article{FayAgn91,
author = {Fay, J. M. and Agnagna, M.},
title = {A population survey of forest elephants (\emph{{L}oxodonta africana cyclotis}) in northern {C}ongo},
journal = {African Journal of Ecology},
year = {1991},
volume = {29},
pages = {177--87}
}
|
|||||
| Felce, T., Stone, E., Whiteford, J., James, E., Castrillon, J. & Evans, P. G. | To what extent can distance sampling be combined with photo identification as a monitoring tool for Tursiops truncatus [BibTeX] |
: | |||
BibTeX:
@unpublished{Felce,
author = {Tom Felce and Eleanor Stone and Jim Whiteford and Eve James and Juliana Castrillon and Peter G.H. Evans},
title = {To what extent can distance sampling be combined with photo identification as a monitoring tool for \textit{Tursiops truncatus}}
}
|
|||||
| Ferguson, J. & Bester, M. | 2002 | The treatment of spatial autocorrelation in biological surveys: The case of line transect surveys | Antarctic Science 14:115--122 | ||
| Abstract: Marked spatial autocorrelation was encountered in an extensive data set on Antarctic seal densities as well as Antarctic pack ice characteristics. Whilst me methodology of measuring spatial autocorrelation is well developed, there is no established infrastructure for statistical inference in terms of correlation analysis or ANOVA. We survey the literature that deals with these problems, as well as some of the approaches that have been proposed for taking autocorrelation into account in inferential statistics. We apply these approaches to a data set comprising Antarctic pack ice seal counts as well as a few environmental measures. In contrast to the predictions from the existing literature, nonlinear estimation suggested that Pearson's r substantially overestimates the tree correlation between seal densities and environmental variables. When compared to spatially adjusted analysis of variance, conventional ANOVA that compared seal densities or pack ice characteristics in different areas overestimated the degree of difference between these areas in proportion to the degree of spatial autocorrelation of the particular data set. In our case, the effects of spatial autocorrelation were not neutralised by treating entire transects as single points. These results emphasise the need for a methodology that takes spatial autocorrelation into account for interpreting the spatial data on Antarctic seals collected during the Antarctic pack ice seal (APIS) program. New software written for performing these analyses is available from the senior author. | |||||
BibTeX:
@article{Ferguson2002,
author = {Ferguson, J.W.H. and Bester, M.N.},
title = {The treatment of spatial autocorrelation in biological surveys: The case of line transect surveys},
journal = {Antarctic Science},
year = {2002},
volume = {14},
number = {2},
pages = {115--122}
}
|
|||||
| Ferreira, S. M. & Roberts, C. C. | 2003 | Distribution and abundance of Maui's dolphins (Cephalorhynchus hectori maui) along the North Island west coast, New Zealand [BibTeX] |
: | ||
BibTeX:
@techreport{Ferreira2003,
author = {Ferreira, S. M. and Roberts, C. C.},
title = {Distribution and {abundance of Maui's dolphins (\textit{Cephalorhynchus hectori maui}) along the North Island west coast, New Zealand}},
year = {2003},
number = {93}
}
|
|||||
| Fewster, R. M. & Buckland, S. T. | 2004 | Assessment of distance sampling estimators [BibTeX] |
Advanced Distance Sampling :281-306 | ||
BibTeX:
@incollection{FewBuc04,
author = {Fewster,R. M. and Buckland,S. T.},
title = {Assessment of distance sampling estimators},
booktitle = {Advanced Distance Sampling},
publisher = {Oxford University Press},
year = {2004},
pages = {281-306}
}
|
|||||
| Fewster, R. M., Buckland, S. T., Burnham, K. P., Borchers, D. L., Jupp, P. E., Laake, J. L. & Thomas., L. | 2009 | Estimating the encounter rate variance in distance sampling [BibTeX] |
Biometrics 65:225--236 | ||
BibTeX:
@article{Fewster2008b,
author = {Fewster, R. M. and S. T. Buckland and K. P. Burnham and D. L. Borchers and P. E. Jupp and J. L. Laake and L. Thomas.},
title = {Estimating the encounter rate variance in distance sampling},
journal = {Biometrics},
year = {2009},
volume = {65},
pages = {225--236}
}
|
|||||
| Fewster, R. M., Laake, J. & Buckland, S. T. | 2005 | Line Transect Sampling in Small and Large Regions [BibTeX] |
Biometrics 61:856--859 | ||
BibTeX:
@article{Fewetal2005,
author = {Fewster,R. M. and Laake,J.L. and Buckland,S. T.},
title = {Line Transect Sampling in Small and Large Regions},
journal = {Biometrics},
year = {2005},
volume = {61},
pages = {856--859}
}
|
|||||
| Fewster, R. M., Southwell, C., Borchers, D. L. & Buckland, S. T.and Pople, A. R. | 2008 | The influence of animal mobility on the assumption of uniform distances in aerial line transect surveys [BibTeX] |
Wildlife Research 35:275--288 | ||
BibTeX:
@article{Fewster2008,
author = {Fewster, R. M. and Southwell, C. and Borchers, D. L. and Buckland, S. T.and Pople, A. R.},
title = {The influence of animal mobility on the assumption of uniform distances in aerial line transect surveys},
journal = {Wildlife Research},
year = {2008},
volume = {35},
pages = {275--288}
}
|
|||||
| Fewster, R. & Jupp, P. | 2009 | Inference on population size in binomial detectability models [BibTeX] |
Biometrika 96: | ||
BibTeX:
@article{Fewster2009,
author = {Fewster, R.M., and Jupp, P.E.},
title = {Inference on population size in binomial detectability models},
journal = {Biometrika},
year = {2009},
volume = {96}
}
|
|||||
| Fewster, R. & Pople, A. | 2008 | A comparison of mark-recapture distance sampling methods applied to aerial surveys of Eastern grey kangaroos [BibTeX] |
Wildlife Research 35:320--330 | ||
BibTeX:
@article{Fewster2008a,
author = {Fewster, R.M., and Pople, A.R.},
title = {A comparison of mark-recapture distance sampling methods applied to aerial surveys of Eastern grey kangaroos},
journal = {Wildlife Research},
year = {2008},
volume = {35},
pages = {320--330}
}
|
|||||
| Finlayson, G., Diment, A., Mitrovski, P., Thompson, G. & Thompson, S. | 2010 | Estimating western ringtail possum (Pseudocheirus occidentalis) density using distance sampling [BibTeX] |
Australian Mammalogy 32:197--200 | DOI | |
BibTeX:
@article{Finlayson2010,
author = {Finlayson, G.R. and Diment, A.N. and Mitrovski, P. and Thompson, G.G., and Thompson, S.A.},
title = {Estimating western ringtail possum (\textit{Pseudocheirus occidentalis}) density using distance sampling},
journal = {Australian Mammalogy},
year = {2010},
volume = {32},
pages = {197--200},
doi = {10.1071/AM09037}
}
|
|||||
| Fiske, I. & Chandler, R. | 2010 | Package unmarked [BibTeX] |
: | ||
BibTeX:
@techreport{Fiske2010,
author = {Ian Fiske and Richard Chandler},
title = {Package unmarked},
year = {2010}
}
|
|||||
| Fiske, I. J. & Chandler, R. B. | 2011 | unmarked: an R package for fitting hierarchical models of wildlife occurrence and abundance [BibTeX] |
Journal of Statistical Software 43:1--23 | ||
BibTeX:
@article{Fiske2011,
author = {Ian J. Fiske and Richard B. Chandler},
title = {unmarked: an R package for fitting hierarchical models of wildlife occurrence and abundance},
journal = {Journal of Statistical Software},
year = {2011},
volume = {43},
pages = {1--23}
}
|
|||||
| Fitzgerald, S. M. & Tanner, G. W. | 1992 | Avian community response to fire and mechanical shrub control in south Florida [BibTeX] |
Journal of Range Management 45:396--400 | ||
BibTeX:
@article{FitTan92,
author = {Fitzgerald, S. M. and Tanner, G. W.},
title = {Avian community response to fire and mechanical shrub control in south {F}lorida},
journal = {Journal of Range Management},
year = {1992},
volume = {45},
pages = {396--400}
}
|
|||||
| Fleming, K. K. & Giuliano, W. M. | 1998 | Effect of border-edge cuts on birds at woodlot edges in southwestern Pennsylvania [BibTeX] |
Journal of Wildlife Management 62:1430--1437 | ||
BibTeX:
@article{FleGiu98,
author = {Fleming, K. K., and Giuliano, W. M.},
title = {Effect of border-edge cuts on birds at woodlot edges in southwestern {P}ennsylvania},
journal = {Journal of Wildlife Management},
year = {1998},
volume = {62},
pages = {1430--1437}
}
|
|||||
| Fletcher, J. R. & Hutto, L. R. | 2006 | Estimating detection probabilities of river birds using double surveys [BibTeX] |
The Auk 123:695--707 | ||
BibTeX:
@article{FleHut06,
author = {Fletcher, J. R. and Hutto, L. R.},
title = {Estimating detection probabilities of river birds using double surveys},
journal = {The Auk},
year = {2006},
volume = {123},
pages = {695--707}
}
|
|||||
| Focardi, S., De Marinis, A., Rizzotto, M. & Pucci, A. | 2001 | Comparative evaluation of thermal infrared imaging and spotlighting to survey wildlife | Wildlife Society Bulletin 29:133--139 | ||
| Abstract: Spotlighting (SL) is used widely to estimate animal abundance, but it yields density estimates that are underestimated and biased. Introduction of distance sampling has, to a large extent, contributed to solving these problems, but the reliability of this statistical method depends strongly on sample size. Thermal infrared (TI) imaging may improve number of observations, but very few studies have quantified performance of TI imaging relative to SL. This comparison is relevant because the high cost of a TI device is justified only by a significant increase of observations and a consequent reduction of labor costs. Our objectives were to compare animal detectability by SL and TI imaging as a function of animal size, species (red deer [Cervus elaphus], fallow deer [Dama dama], wild boar [Sus scrofa], red fox [Vulpes vulpes], European rabbit [Oryctolagus cuniculus], and brown hare [Lepus europaeus]), distance, and season. We also analyzed group size and composition for red deer and effect of grass height on detection of hares and rabbits. On average, TI imaging was more efficient (P<0.001) than SL, which detected only 53.8% of the animals observed by TI imaging. This was especially true for wild boar (92.1%), but both devices observed comparable red fox (P=0.60) and fallow deer (P=0.72) numbers. Relative detectability of the 2 devices was influenced by different factors: for red deer, TI was more efficient than SL in summer and autumn, but not in winter; male groups of red deer were better observed by TI imaging than by SL; and wild boars were better imaged at short (0-100-m) distances with TI. Relative effectiveness of both instruments was not influenced by grass height (P=0.92). Our results showed that wild boar should only be surveyed using TI imager and that a strong improvement of sample size can be obtained using TI for red deer, brown hare, and European rabbit. | |||||
BibTeX:
@article{Focardi2001,
author = {Focardi, S. and De Marinis, A.M. and Rizzotto, M. and Pucci, A.},
title = {Comparative evaluation of thermal infrared imaging and spotlighting to survey wildlife},
journal = {Wildlife Society Bulletin},
year = {2001},
volume = {29},
number = {1},
pages = {133--139}
}
|
|||||
| Focardi, S., Isotti, R., Raganella Pelliccioni, E. & Iannuzzo, D. | 2002 | The use of distance sampling and mark-resight to estimate the local density of wildlife populations | Environmetrics 13:177--186 | ||
| Abstract: We used distance sampling (line transects) and mark-resight to estimate habitat and local area (area size, range: 3.9-44.5 ha) population density of ungulates. The distance sampling study was performed on fallow deer (Dama dama), roe deer (Capreolus capreolus) and wild boar (Sus scrofa) in a mediterranean forest. The mark-resight study was performed on a roe deer population in a hilly area of the Apennines. The first study allowed us to estimate the animal density into four different habitats (deciduous oak wood, evergreen oak wood, maquis and open areas with domestic-pine woods). The between habitat differences of population density are large for the three species: fallow deer are more abundant in the open areas (22.22 heads/km2, c.i. 12.42-39.74), roe deer in the deciduous oak wood (14.50 heads/km2, c.i. 7.01-30.10) and wild boar in both the open areas (11.29 heads/km2, c.i. 4.86-26.20) and evergreen oak wood (10.42 heads/km2, c.i. 6.78-16.02). The roe deer population in the Apennines is characterized by large between-zone variations of population density (range: 1997: 13.25-131.31, 1998: 29.06-78.01, 1999: 10.67-88.58). Moreover, trends of local zones may be quite different with respect to the average trend of a wider study area, suggesting a well-defined short-scale spatial structure for this population. We conclude that both survey methods may be very useful in population assessment, but they need intense field effort and careful statistical design. Care needs to be taken to satisfy the assumptions of the statistical models. Copyright © 2002 John Wiley & Sons, Ltd. | |||||
BibTeX:
@article{Focardi2002,
author = {Focardi, S. and Isotti, R. and Raganella Pelliccioni, E. and Iannuzzo, D.},
title = {The use of distance sampling and mark-resight to estimate the local density of wildlife populations},
journal = {Environmetrics},
year = {2002},
volume = {13},
number = {2},
pages = {177--186}
}
|
|||||
| Focardi, S., Isotti, R. & Tinelli, A. | 2002 | Line Transect Estimates of Ungulate Populations in a Mediterranean Forest | The Journal of Wildlife Management 66:48--58 | URL | |
| Abstract: We used line transect (distance) methodology to estimate the population density of fallow deer (Dama dama), roe deer (Capreolus capreolus), and wild boars (Sus scrofa) in a dense Mediterranean forest. Three different surveys (1 per year from 1995 to 1997) were analyzed. Density estimates, pooled among years, for fallow deer (9.9 deer/$km^2$, %CV = 24) and roe deer (8.5 deer/$km^2$, %CV = 21) were more precise than the estimate for wild boars (10.6 boars/$km^2$, %CV = 55). Fallow deer density was significantly higher during 1997 than during 1995 or 1996. For wild boars, we found differences among years (1995: 23.6 boars/$km^2$, %CV = 23; 1996: 10.9 boars/$km^2$, %CV = 24; 1997: 3.9 boars/$km^2$, %CV = 33). We attempted a confirmatory analysis using an independent survey method for fallow deer and total counts at supplementary feeding sites for wild boars. These comparisons showed that line transect estimates were negatively biased for fallow deer during 1996-1997 and for wild boars during 1997. For adults, the composition by sex from line transects was compared with information collected from fixed observation points. Differences in sex composition for fallow deer and wild boars were found when these 2 methods were compared. The structure of the roe deer population was similar when line transect information was compared with independent survey data. A spike in the detection probability function for wild boars may have been caused by the difficulty of detecting boars >20 m from the transect. The careful use of line transect sampling may prove useful for both research and management of fallow deer, roe deer, and wild boars. | |||||
BibTeX:
@article{Focardi2002a,
author = {Focardi, Stefano and Isotti, Roberto and Tinelli, Aleandro},
title = {Line Transect Estimates of Ungulate Populations in a Mediterranean Forest},
journal = {The Journal of Wildlife Management},
year = {2002},
volume = {66},
number = {1},
pages = {48--58},
url = {http://links.jstor.org/sici?sici=0022-541X%28200201%2966%3A1%3C48%3ALTEOUP%3E2.0.CO%3B2-S}
}
|
|||||
| Focardi, S., Montanaro, P., Isotti, R., Ronchi, F., Scacco, M. & Calmanti, R. | 2005 | Distance sampling effectively monitored a declining population of Italian roe deer Capreolus capreolus italicus | ORYX 39:421--428 | ||
| Abstract: Monitoring rare species of wild ungulates is critical for their conservation management. The Italian roe deer Capreolus capreolus italicus was recently confirmed to be a subspecies in Mediterranean habitats of central and southern Italy. We have monitored this subspecies at Castelporziano, near Rome, since 1988, and detected an abrupt population decline in 2001. We compared distance sampling surveys undertaken before and after the population crash to determine the ability of this method to detect variations in animal density and to investigate which factors may influence the precision of the estimates. We used radio tagged roe deer to evaluate the accuracy of our surveys, comparing distance sampling and mark-resight estimates at the same site, and studying the behavioural reaction of the animals to the presence of an observer. We found that before the crash distance sampling surveys attained a good precision but that the survey conditions influenced both precision and accuracy. Post-crash surveys were less precise, but the difference in density, before and after the crash was highly significant, indicating the potential of the method to quickly detect density variations and so to allow wildlife managers to react without delay to a crisis. The direct test of distance sampling assumptions showed that estimates were almost unbiased. We conclude that the methodology was successful for monitoring this population and that it may be used in other situations where ungulates are rare and efficient monitoring must be attained with restricted budgets. © 2005 FFI. | |||||
BibTeX:
@article{Focardi2005,
author = {Focardi, S. and Montanaro, P. and Isotti, R. and Ronchi, F. and Scacco, M. and Calmanti, R.},
title = {Distance sampling effectively monitored a declining population of Italian roe deer \textit{Capreolus capreolus italicus}},
journal = {ORYX},
year = {2005},
volume = {39},
number = {4},
pages = {421--428}
}
|
|||||
| Fogarty, J. H. & Vilella, F. J. | 2001 | Evaluating Methodologies to Survey Eleutherodactylus Frogs in Montane Forests of Puerto Rico | Wildlife Society Bulletin 29:948--955 | ||
| Abstract: The evaluation of anuran call-count survey methods against more precise population estimation techniques for validation purposes is being researched only recently. Many investigators believe that call-survey methods should be calibrated to true population size to obtain reliable records, and this has not been done for call-survey methods in Neotropical regions. We compared anuran survey methodologies in the Cordillera Central of Puerto Rico. We evaluated using mark-recapture, transects, and point counts to survey Eleutherodactylus populations for information content, logistics, and effort in native cordillera forest and eucalyptus plantations. We used programs CAPTURE and DISTANCE to generate population estimates and associated variances. Mark-recapture results showed density of E. coqui males was greater (P=0.04) in native forest. Total population estimates derived from mark-recapture were used with calling estimates to calculate proportion of calling males. Humidity was associated with density of calling males in native forest (P<0.001) and eucalyptus (P=0.01) plantations. Call counts of E. coqui within 5-m radius of points were correlated with density of calling males in native (P<0.001) and eucalyptus (P=0.001) sites and for combined data (P<0.001). We recommend that mark-recapture be used when detailed information is needed on an anuran species. Mean species richness detected between line transect (x=1.98) and point count (x=1.67) differed significantly; only one frog species was detected using mark-recapture. Point counts required the least effort but provided the least amount of useful information. Future research should develop predictive models linking call counts to density estimates and examine seasonal effects. | |||||
BibTeX:
@article{Fogarty2001,
author = {Jarrod H. Fogarty and Francisco J. Vilella},
title = {Evaluating Methodologies to Survey \textit{Eleutherodactylus Frogs} in Montane Forests of Puerto Rico},
journal = {Wildlife Society Bulletin},
year = {2001},
volume = {29},
pages = {948--955}
}
|
|||||
| Folkard, N. F. G. & Smith, J. N. M. | 1995 | Evidence for bottom up effects in the boreal forest: do passerine birds respond to large scale experimental fertilization? [BibTeX] |
Canadian Journal of Zoology 73:2231--2237 | ||
BibTeX:
@article{FolSmi95,
author = {Folkard, N. F. G. and Smith, J. N. M.},
title = {Evidence for bottom up effects in the boreal forest: do passerine birds respond to large scale experimental fertilization?},
journal = {Canadian Journal of Zoology},
year = {1995},
volume = {73},
pages = {2231--2237}
}
|
|||||
| Fontaine, A., Kennedy, P. & Johnson, D. | 2004 | Effects of distance from cattle water developments on grassland birds | Journal of Range Management 57:238--242 | ||
| Abstract: Many North American grassland bird populations appear to be declining, which may be due to changes in grazing regimes on their breeding areas. Establishment of water developments and confining cattle (Bos taurus L.) to small pastures often minimizes spatial heterogeneity of cattle forage consumption, which may lead to uniformity in vegetative structure. This increased uniformity may provide suitable habitat for some bird species but not others. We assessed how cattle use, vegetative structure, and bird population densities varied with increasing distance from water developments (0-800 m) on the Little Missouri National Grassland (LMNG) in North Dakota. Lark buntings (Calamospiza melancorys Stejneger), which are typically associated with low vegetative cover, decreased with increasing distance from water developments. Horned larks (Eremophila alpestris L.), also a low-cover associate, followed a similar but weaker trend. Densities of another low-cover associate as well as moderate- and high-cover associates were not related to distance from water. Vegetative height-density and litter depth increased by 50 and 112%, respectively, while cowpie cover and structural variability decreased by 51 and 24%, respectively, with distance from water. Confidence interval overlap was common among all measures, showing substantial variability among study sites. Our results indicate cattle use is higher closer to water developments, and this pattern may positively affect the densities of lark buntings and horned larks. The absence of density gradients in the other bird species may be due to the paucity of locations > 800 m from water on the LMNG. | |||||
BibTeX:
@article{Fontaine2004,
author = {Fontaine, A.L. and Kennedy, P.L. and Johnson, D.H.},
title = {Effects of distance from cattle water developments on grassland birds},
journal = {Journal of Range Management},
year = {2004},
volume = {57},
number = {3},
pages = {238--242}
}
|
|||||
| Foote, K. G. & Stefansson, G. | 1993 | Definition of the problem of estimating fish abundance over an area from acoustic line transect measurements of density [BibTeX] |
ICES Journal of Marine Science 50:369--381 | ||
BibTeX:
@article{FooSte93,
author = {Foote, K. G. and Stefansson, G.},
title = {Definition of the problem of estimating fish abundance over an area from acoustic line transect measurements of density},
journal = {ICES Journal of Marine Science},
year = {1993},
volume = {50},
pages = {369--381}
}
|
|||||
| Forbes, A. R., Mueller, J. M., Mitchell, R. B., Dabbert, C. B. & Wester, D. B. | 2000 | Accuracy of red imported fire ant mound density estimates | Southwestern Entomologist 25:109--112 | ||
| Abstract: Accuracy of red imported fire ant, Solenopsis invicta Buren, mound density estimates was evaluated during 1998 in the Texas Coastal Prairie. Mound densities were estimated using belt transects and distance sampling, the grasslands were burned, and the estimated mound densities compared to complete ant mound counts made on each of the five sites. Mound population density estimates did not differ among the three methods. Detection of S. invicta mounds decreased with distance from the line transect on three sites. Based on the detection function derived by Program DISTANCE for these sites, we recorded 89.9, 97.3, and 98.1% of S. invicta mounds within 1 m and 70.8, 89.9, and 92.7% of S. invicta mounds within 2 m of the line transects, respectively. The 2-m belt transects and distance sampling are accurate estimators of S. invicta mound densities in grassland habitats. Although distance sampling is more time consuming, it does not require the assumption that all mounds are observed. This benefit was not obvious in this study because of the similarity of our sites and the high detectability of mounds within the 2-m belt transects. Accuracy of belt transects would decrease if wider transects were used or if detectability of S. invicta mounds was lower, such as in denser vegetation. We recommend using belt transects or distance sampling to estimate S. invicta mound density in grassland habitats. | |||||
BibTeX:
@article{Forbes2000,
author = {Forbes, A. R. and Mueller, J. M. and Mitchell, R. B. and Dabbert, C. B. and Wester, D. B.},
title = {Accuracy of red imported fire ant mound density estimates},
journal = {Southwestern Entomologist},
year = {2000},
volume = {25},
number = {2 SUPPL.},
pages = {109--112}
}
|
|||||
| Forcada, J. | 2002 | Multivariate methods for size-dependent detection in conventional line transect sampling [BibTeX] |
: | ||
BibTeX:
@techreport{Forcada2002,
author = {Forcada, J.},
title = {Multivariate methods for size-dependent detection in conventional line transect sampling},
year = {2002}
}
|
|||||
| Forcada, J., Disciara, G. N. & Fabbri, F. | 1995 | Abundance of fin whales and striped dolphins summering in the Corso-Ligurian Basin [BibTeX] |
Mammalia 59:127--140 | ||
BibTeX:
@article{Foretal95,
author = {Forcada, J. and Disciara, G. N. and Fabbri, F.},
title = {Abundance of fin whales and striped dolphins summering in the Corso-Ligurian Basin},
journal = {Mammalia},
year = {1995},
volume = {59},
pages = {127--140}
}
|
|||||
| Forcada, J., Gazo, M., Aguilar, A., Gonzalvo, J. & Fernández-Contreras, M. | 2004 | Bottlenose dolphin abundance in the NW Mediterranean: Addressing heterogeneity in distribution | Marine Ecology Progress Series 275:275--287 | ||
| Abstract: Line-transect estimators were developed to assess abundance of coastal dolphins Tursiops truncatus and Stenella coeruleoalba encountered in low densities during aerial sighting surveys. The analysis improved on conventional approaches by objectively combining data from different species, survey areas and other covariates affecting dolphin detectability. Model selection and multimodel inference allowed robust estimates of precision in accounting for covariate selection uncertainty. These methods were used to estimate bottlenose dolphin abundance in NE Mediterranean waters that included a putative subpopulation in the Balearic Islands. Total abundance was estimated as 7654 (coefficient of variation, CV = 0.47; 95 % CI = 1608 to 15 766) and the abundance in inshore waters of the Balearic Islands varied from 727 (CV = 0.47; 95 % CI = 149 to 1481) dolphins in spring 2002 to 1333 (CV = 0.44; 95 % CI = 419 to 2617) dolphins in autumn 2002, with an average estimate of 1030 (CV = 0.35; 95 % CI = 415 to 1849). The results do not support an exclusively coastal Balearic Island subpopulation, but they strongly indicate that the islands contain critical habitats required for the conservation of the species. Given the observed decline of the species during the last few decades, conservation-oriented management should focus on reducing or eliminating adverse fishing interactions while key areas are protected from encroachment produced by human development. | |||||
BibTeX:
@article{Foretal04,
author = {Forcada, J. and Gazo, M. and Aguilar, A. and Gonzalvo, J. and Fern\'andez-Contreras, M.},
title = {Bottlenose dolphin abundance in the NW Mediterranean: Addressing heterogeneity in distribution},
journal = {Marine Ecology Progress Series},
year = {2004},
volume = {275},
pages = {275--287}
}
|
|||||
| Forcada, J. & Hammond, P. | 1998 | Geographical variation in abundance of striped and common dolphins of the western Mediterranean [BibTeX] |
Journal of Sea Research 39:313--325 | ||
BibTeX:
@article{ForHam98,
author = {Forcada, J. and Hammond, P.},
title = {Geographical variation in abundance of striped and common dolphins of the western Mediterranean},
journal = {Journal of Sea Research},
year = {1998},
volume = {39},
pages = {313--325}
}
|
|||||
| Forney, K. A. & Barlow, J. | 1998 | Seasonal patterns in the abundance and distribution of California cetaceans, 1991-1992 [BibTeX] |
Marine Mammal Science 14:460--489 | ||
BibTeX:
@article{ForBar98,
author = {Forney, K. A. and Barlow, J.},
title = {Seasonal patterns in the abundance and distribution of {C}alifornia cetaceans, 1991-1992},
journal = {Marine Mammal Science},
year = {1998},
volume = {14},
pages = {460--489}
}
|
|||||
| Franklin, A. B., Anderson, D. R. & Burnham, K. P. | 2002 | Estimation of long-term trends and variation in avian survival probabilities using random effects models [BibTeX] |
Journal of Applied Statistics 29:267--287 | ||
BibTeX:
@article{Fraetal02,
author = {Franklin, A. B. and Anderson, D. R. and Burnham, K. P.},
title = {Estimation of long-term trends and variation in avian survival probabilities using random effects models},
journal = {Journal of Applied Statistics},
year = {2002},
volume = {29},
pages = {267--287}
}
|
|||||
| Franzreb, K. E. | 1981 | Determination of avian densities using the variable-strip and fixed-width transect surveying methods [BibTeX] |
Estimating Numbers of Terrestrial Birds :139--145 | ||
BibTeX:
@incollection{Fra81,
author = {Franzreb, K. E.},
title = {Determination of avian densities using the variable-strip and fixed-width transect surveying methods},
booktitle = {Estimating Numbers of Terrestrial Birds},
publisher = {Cooper Ornithological Society},
year = {1981},
number = {6},
pages = {139--145}
}
|
|||||
| Franzreb, K. E. | 1976 | Comparison of variable strip transect and spot-map methods for censusing avian populations in a mixed-coniferous forest [BibTeX] |
Condor 78:260--262 | ||
BibTeX:
@article{Fra76,
author = {Franzreb, K. E.},
title = {Comparison of variable strip transect and spot-map methods for censusing avian populations in a mixed-coniferous forest},
journal = {Condor},
year = {1976},
volume = {78},
pages = {260--262}
}
|
|||||
| Freed, L.A., C. R. B. G. | 2008 | Incipient extinction of a major population of the Hawaii akepa owing to introduced species [BibTeX] |
Evolutionary Ecology Research 10:931-965 | URL | |
BibTeX:
@article{Freed2008931,
author = {Freed, L.A., Cann, R.L., Bodner, G.R.},
title = {Incipient extinction of a major population of the Hawaii akepa owing to introduced species},
journal = {Evolutionary Ecology Research},
year = {2008},
volume = {10},
number = {7},
pages = {931-965},
note = {cited By (since 1996) 2},
url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-57849160828&partnerID=40&md5=84937affbc432360faeb5025c25a3926}
}
|
|||||
| Freilich, J., Burnham, K. P., Collins, C. M. & Garry, C. A. | 2000 | Factors affecting population assessments of desert tortoises [BibTeX] |
Conservation Biology 14:1479--1489 | ||
BibTeX:
@article{Freetal00,
author = {Freilich, J and Burnham, K. P and Collins, C. M. and Garry, C. A.},
title = {Factors affecting population assessments of desert tortoises},
journal = {Conservation Biology},
year = {2000},
volume = {14},
pages = {1479--1489}
}
|
|||||
| Freilich, J., Camp, R., Duda, J. & Karl, A. | 2005 | Problems with sampling desert tortoises: A simulation analysis based on field data | Journal of Wildlife Management 69:45--56 | ||
| Abstract: The desert tortoise (Gopherus agassizii) was listed as a U.S. threatened species in 1990 based largely on population declines inferred from mark-recapture surveys of 2.59-km2 (1-mi2) plots. Since then, several census methods have been proposed and tested, but all methods still pose logistical or statistical difficulties. We conducted computer simulations using actual tortoise location data from 2 1-mi2 plot surveys in southern California, USA, to identify strengths and weaknesses of current sampling strategies. We considered tortoise population estimates based on these plots as ``truth" and then tested various sampling methods based on sampling smaller plots or transect lines passing through the mile squares. Data were analyzed using Schnabel's mark-recapture estimate and program CAPTURE. Experimental subsampling with replacement of the 1-mi2 data using 1-km2 and 0.25-km2 plot boundaries produced data sets of smaller plot sizes, which we compared to estimates from the 1-mi 2 plots. We also tested distance sampling by saturating a 1-mi 2 site with computer simulated transect lines, once again evaluating bias in density estimates. Subsampling estimates from 1-km2 plots did not differ significantly from the estimates derived at 1-mi2. The 0.25-km2 subsamples significantly overestimated population sizes, chiefly because too few recaptures were made. Distance sampling simulations were biased 80% of the time and had high coefficient of variation to density ratios. Furthermore, a prospective power analysis suggested limited ability to detect population declines as high as 50%. We concluded that poor performance and bias of both sampling procedures was driven by insufficient sample size, suggesting that all efforts must be directed to increasing numbers found in order to produce reliable results. Our results suggest that present methods may not be capable of accurately estimating desert tortoise populations. | |||||
BibTeX:
@article{Freilich2005,
author = {Freilich, J.E. and Camp, R.J. and Duda, J.J. and Karl, A.E.},
title = {Problems with sampling desert tortoises: A simulation analysis based on field data},
journal = {Journal of Wildlife Management},
year = {2005},
volume = {69},
number = {1},
pages = {45--56}
}
|
|||||
| Fuller, R. J. & Langslow, D. R. | 1984 | Estimating numbers of birds by point counts: how long should counts last? [BibTeX] |
Bird Study 31:195--202 | ||
BibTeX:
@article{FulLan84,
author = {Fuller, R. J. and Langslow, D. R.},
title = {Estimating numbers of birds by point counts: how long should counts last?},
journal = {Bird Study},
year = {1984},
volume = {31},
pages = {195--202}
}
|
|||||
| Fulling, G., Thorson, P. & Rivers, J. | 2011 | Distribution and abundance estimates for Cetaceans in the waters off Guam and the Commonwealth of the Northern Mariana Islands [BibTeX] |
Pacific Science 65:321--343 | ||
BibTeX:
@article{Fullinginpress,
author = {Fulling, G.L. and P.H. Thorson and J. Rivers},
title = {Distribution and abundance estimates for Cetaceans in the waters off Guam and the Commonwealth of the Northern Mariana Islands},
journal = {Pacific Science},
year = {2011},
volume = {65},
pages = {321--343}
}
|
|||||
| Funk, W., Almeida-Reinoso, D., Nogales-Sornosa, F. & Bustamante, M. | 2003 | Monitoring population trends of Eleutherodactylus frogs | Journal of Herpetology 37:245--256 | ||
| Abstract: Like many Neotropical frogs, a number in the genus Eleutherodactylus have declined or gone extinct in the past two decades. However, the extent of Eleutherodactylus population declines is unknown. Our objective was to identify a good method for monitoring the density of Eleutherodactylus populations to assess the extent of declines. We did this in two ways. First, we compared two methods of directly estimating density, closed population capture-recapture analysis and distance sampling, and one method of indirectly estimating density, visual encounter surveys, for multiple Eleutherodactylus species at three sites in Ecuador. We then conducted a power analysis to estimate the power of our current sampling design to detect declines. Distance sampling estimates of density were biased low compared to capture-recapture estimates. When we corrected this bias, distance sampling estimates became imprecise. Estimates of density from visual encounter surveys were also imprecise. In contrast, capture-recapture estimates were fairly precise and most likely unbiased. Moreover, capture-recapture analysis had the most power to detect declines, although even with capture-recapture analysis, power was low with only five years of sampling. We conclude that capture-recapture analysis is a good method for monitoring Eleutherodactylus density over time, but the sampling area and/or the number of sampling occasions should be increased from the area and number of occasions used here in order to increase sample sizes and therefore power. | |||||
BibTeX:
@article{Funk2003,
author = {Funk, W.C. and Almeida-Reinoso, D. and Nogales-Sornosa, F. and Bustamante, M.R.},
title = {Monitoring population trends of \textit{Eleutherodactylus} frogs},
journal = {Journal of Herpetology},
year = {2003},
volume = {37},
number = {2},
pages = {245--256}
}
|
|||||
| Gabelli, F. M., Fernández, G. J., Ferretti, V., Posse, G., Coconier, E., Gavieiro, H. J., Llambías, P. E., Peláez, P. I., Vallés, M. L. & Tubaro, P. L. | 2004 | Range contraction in the pampas meadowlark Sturnella defilippii in the southern pampas grasslands of Argentina [BibTeX] |
ORYX 38:164--170 | ||
BibTeX:
@article{Gabelli2004,
author = {Gabelli, F. M. and Fern{\'a}ndez, G. J. and Ferretti, V. and Posse, G. and Coconier, E. and Gavieiro, H. J. and Llamb{\'i}as, P. E. and Pel{\'a}ez, P. I. and Vall{\'e}s, M. L. and Tubaro, P. L.},
title = {Range contraction in the pampas meadowlark \textit{Sturnella defilippii} in the southern pampas grasslands of Argentina},
journal = {ORYX},
year = {2004},
volume = {38},
number = {2},
pages = {164--170}
}
|
|||||
| Gaillard, J. M., Boutin, J.-M. & Van Laere, G. | 1993 | The use of line transects for estimating the population density of roe deer --- a feasibility study [BibTeX] |
Revue d'Ecologie --- la Terre et la Vie 48:73--85 | ||
BibTeX:
@article{Gaietal93,
author = {Gaillard, J. M. and Boutin, J.-M. and Van Laere, G.},
title = {The use of line transects for estimating the population density of roe deer --- a feasibility study},
journal = {Revue d'Ecologie --- la Terre et la Vie},
year = {1993},
volume = {48},
pages = {73--85}
}
|
|||||
| Gale, G. A., Round, P. D. & Pierce, A. J. | 2009 | A Field Test of Distance Sampling Methods for a Tropical Forest Bird Community [BibTeX] |
The Auk 126:439--448 | ||
BibTeX:
@article{Gale2009,
author = {George A. Gale and Philip D. Round and Andrew J. Pierce},
title = {A Field Test of Distance Sampling Methods for a Tropical Forest Bird Community},
journal = {The Auk},
year = {2009},
volume = {126},
pages = {439--448}
}
|
|||||
| Gale, G. & Thongaree, S. | 2006 | Density estimates of nine hornbill species in a lowland forest site in southern Thailand | Bird Conservation International 16:57--69 | ||
| Abstract: Hornbills are useful indicators of forest condition and human disturbance because they require large tracts of unfragmented forest with large fruiting trees for feeding and nesting. They are relatively large-bodied, which makes them targets for hunting. Density estimates of such species are critical for population monitoring and serve as a baseline against which future changes can be measured. In this study we used variable-width line transect surveys to estimate the densities of nine hornbill species in the Bala portion of the Hala-Bala Wildlife Sanctuary on the Thai-Malaysia border, one of the few remaining areas of lowland forest in Thailand. The hornbill species were: Rhinoceros (Buceros rhinoceros), Great (B. bicornis), Helmeted (B. vigil), Black (Anthracoceros malayanus), Bushy-crested (Anorrhinus galeritus), White-crowned (Aceros comatus), Wrinkled (A. corrugatus), Wreathed (A. undulatus) and Plain-pouched (A. subruficollis). Between January 2001 and April 2002, 11 transects along trails, old logging roads and one paved road were surveyed once per month. A total of 1,261 observations of the nine species were made during the observation period. Estimates for Rhinoceros and Helmeted Hornbill were 2.69 and 1.21 individuals/ km2, respectively, and were similar or slightly higher than densities reported elsewhere. Estimates for Great (0.12), Bushy-crested (0.64), Wrinkled (0.08), White-crowned (0.08) and Wreathed Hornbills (0.69) were generally lower than estimates from other areas in the region. It was not possible to obtain density estimates using distance sampling for Black and Plain-pouched Hornbills due to the small number of observations, but our data did suggest that their densities were also low (>0.10 individuals/km2). Potential reasons for differences between this and other areas include a scarcity of lowland habitat, habitat isolation, lower abundance of specific fruit resources and interspecific competition, but these factors require further investigation. Standardization of survey techniques among studies would significantly improve assessments of habitat requirements as well as of the effects of human disturbance on Asian hornbills, most of which are globally threatened. Our study specifically underscores the need for additional research on the Plain-pouched Hornbill, the most threatened of the species studied, as density estimates from elsewhere in its range are lacking, while more generally it highlights the need to investigate the underlying causes of the often substantial variation in hornbill densities among species and sites. © BirdLife International 2006. | |||||
BibTeX:
@article{Gale2006,
author = {Gale, G.A. and Thongaree, S.},
title = {Density estimates of nine hornbill species in a lowland forest site in southern Thailand},
journal = {Bird Conservation International},
year = {2006},
volume = {16},
number = {1},
pages = {57--69}
}
|
|||||
| Galela, R. S. & Roscom, B. A. | 2004 | Distance Sampling Simulated For Density Estimation [BibTeX] |
9th National Convention on Statistics (NCS) : | ||
BibTeX:
@inproceedings{Galela2004,
author = {Rebecca S. Galela and Brigida A. Roscom},
title = {Distance Sampling Simulated For Density Estimation},
booktitle = {9th National Convention on Statistics (NCS)},
year = {2004}
}
|
|||||
| Galindo, J. A., Serrano, A., Vázquez-Castán, L., González-Gándara, C. & López-Ortega, M. | 2009 | Cetacean diversity, distribution, and abundance in Northern Veracruz, Mexico [BibTeX] |
Aquatic Mammals 35:12--18 | ||
BibTeX:
@article{Galindo2009,
author = {José A. Galindo and Arturo Serrano and Laura Vázquez-Castán and Carlos González-Gándara and Marisela López-Ortega},
title = {Cetacean diversity, distribution, and abundance in {Northern Veracruz, Mexico}},
journal = {Aquatic Mammals},
year = {2009},
volume = {35},
pages = {12--18}
}
|
|||||
| Gangadharan, A. | 2005 | Density Estimation and Time Trend Analysis of Large Herbivores in Nagarhole, India [BibTeX] |
: | ||
BibTeX:
@mastersthesis{Gangadharan2005,
author = {Gangadharan, A},
title = {Density Estimation and Time Trend Analysis of Large Herbivores in Nagarhole, India},
school = {Mathematics and Statistics, St. Andrews University},
year = {2005}
}
|
|||||
| Gannier, A. | 2011 | Using existing data and focused surveys to highlight Cuvier's beaked whales favourable areas: A case study in the central Tyrrhenian Sea [BibTeX] |
Marine Pollution Bulletin 63:10 - 17 | DOI URL | |
BibTeX:
@article{Gannier2011,
author = {Alexandre Gannier},
title = {Using existing data and focused surveys to highlight Cuvier's beaked whales favourable areas: A case study in the central Tyrrhenian Sea},
journal = {Marine Pollution Bulletin},
year = {2011},
volume = {63},
number = {1-4},
pages = {10 - 17},
note = {Cetaceans and military sonar: A need for better management},
url = {http://www.sciencedirect.com/science/article/pii/S0025326X10001736},
doi = {DOI: 10.1016/j.marpolbul.2010.03.037}
}
|
|||||
| Gannier, A. | 1998 | Estimation of summer abundance of the striped dolphin Stenella coeruleoalba (Meyen, 1833) in the future northwestern Mediterranean international marine sanctuary [BibTeX] |
Revue d'Ecologie --- la Terre et la Vie 53:255--272 | ||
BibTeX:
@article{Gan98,
author = {Gannier, A.},
title = {Estimation of summer abundance of the striped dolphin {\textit{Stenella coeruleoalba}} ({M}eyen, 1833) in the future northwestern {M}editerranean international marine sanctuary},
journal = {Revue d'Ecologie --- la Terre et la Vie},
year = {1998},
volume = {53},
pages = {255--272}
}
|
|||||
| Gannier, A. | 1997 | Estimation of summer abundance of the fin whale Balaenoptera physalus (Linne, 1758) in the Liguro-Provencal Basin (West Mediterranean) [BibTeX] |
Revue d'Ecologie --- la Terre et la Vie 52:69--86 | ||
BibTeX:
@article{Gan97,
author = {Gannier, A.},
title = {Estimation of summer abundance of the fin whale {\textit{Balaenoptera physalus}} ({L}inne, 1758) in the {L}iguro-{P}rovencal {B}asin ({W}est {M}editerranean)},
journal = {Revue d'Ecologie --- la Terre et la Vie},
year = {1997},
volume = {52},
pages = {69--86}
}
|
|||||
| Garrett-Logan, N. & Smith, T. | 1997 | A hand-held pen-based computer system for marine mammal sighting surveys [BibTeX] |
Marine Mammal Science 13:694--700 | ||
BibTeX:
@article{GarSmi97,
author = {Garrett-Logan, N. and Smith, T.},
title = {A hand-held pen-based computer system for marine mammal sighting surveys},
journal = {Marine Mammal Science},
year = {1997},
volume = {13},
pages = {694--700}
}
|
|||||
| Gaston, A. J., C. B. L. & Diamond, A. W. | 1987 | The `snapshot' count for estimating densities of flying seabirds during boat transects: a cautionary comment [BibTeX] |
The Auk 104:336--8 | ||
BibTeX:
@article{Gasetal87,
author = {Gaston, A. J., Collins, B. L. and Diamond, A. W.},
title = {The `snapshot' count for estimating densities of flying seabirds during boat transects: a cautionary comment},
journal = {The Auk},
year = {1987},
volume = {104},
pages = {336--8}
}
|
|||||
| Gates, C. E. | 1979 | Line transect and related issues [BibTeX] |
Sampling Biological Populations :71--154 | ||
BibTeX:
@incollection{Gat79,
author = {Gates, C. E.},
title = {Line transect and related issues},
booktitle = {Sampling Biological Populations},
publisher = {International Co-operative Publishing House},
year = {1979},
pages = {71--154}
}
|
|||||
| Gates, C. E. | 1980 | LINETRAN, a general computer program for analyzing line transect data [BibTeX] |
Journal of Wildlife Management 44:658--661 | ||
BibTeX:
@article{Gat80,
author = {Gates, C. E.},
title = {{LINETRAN}, a general computer program for analyzing line transect data},
journal = {Journal of Wildlife Management},
year = {1980},
volume = {44},
pages = {658--661}
}
|
|||||
| Gates, C. E. | 1969 | Simulation study of estimators for the line transect sampling method [BibTeX] |
Biometrics 25:317--328 | ||
BibTeX:
@article{Gat69,
author = {Gates, C. E.},
title = {Simulation study of estimators for the line transect sampling method},
journal = {Biometrics},
year = {1969},
volume = {25},
pages = {317--328}
}
|
|||||
| Gates, C. E., Evans, W., Gober, D. R., Guthery, F. S. & Grant, W. E. | 1985 | Line transect estimation of animal densities from large data sets [BibTeX] |
Game Harvest Management :37--50 | ||
BibTeX:
@incollection{Gatetal85,
author = {Gates, C. E. and Evans, W. and Gober, D. R. and Guthery, F. S. and Grant, W. E.},
title = {Line transect estimation of animal densities from large data sets},
booktitle = {Game Harvest Management},
publisher = {Caesar Kleberg Wildlife Research Institute, Texas A\&I University},
year = {1985},
pages = {37--50}
}
|
|||||
| Gates, C. E., Marshall, W. H. & Olson, D. P. | 1968 | Line transect method of estimating grouse population densities [BibTeX] |
Biometrics 24:135--145 | ||
BibTeX:
@article{Gatetal68,
author = {Gates, C. E and Marshall, W. H. and Olson, D. P.},
title = {Line transect method of estimating grouse population densities},
journal = {Biometrics},
year = {1968},
volume = {24},
pages = {135--145}
}
|
|||||
| Gates, C. E. & Smith, P. W. | 1980 | An implementation of the Burnham-Anderson distribution free method of estimating wildlife densities from line transect data [BibTeX] |
Biometrics 36:155--160 | ||
BibTeX:
@article{GatSmi80,
author = {Gates, C. E. and Smith, P. W.},
title = {An implementation of the {B}urnham-{A}nderson distribution free method of estimating wildlife densities from line transect data},
journal = {Biometrics},
year = {1980},
volume = {36},
pages = {155--160}
}
|
|||||
| Geimsdell, J. J. R. & Westley, S. B. (e. | 1979 | Low-Level Aerial Survey Techniques [BibTeX] |
: | ||
BibTeX:
@book{GeiWes79,
author = {Geimsdell, J. J. R. and Westley, S. B. (eds)},
title = {Low-Level Aerial Survey Techniques},
publisher = {International Livestock Centre for Africa},
year = {1979}
}
|
|||||
| Gelatt, T. S. & Siniff, D. B. | 1999 | Line transect survey of crabeater seals in the Amundsen-Bellingshausen Seas, 1994 [BibTeX] |
Wildlife Society Bulletin 27:330--336 | ||
BibTeX:
@article{GelSin99,
author = {Gelatt, T. S. and Siniff, D. B.},
title = {Line transect survey of crabeater seals in the {A}mundsen-{B}ellingshausen {S}eas, 1994},
journal = {Wildlife Society Bulletin},
year = {1999},
volume = {27},
pages = {330--336}
}
|
|||||
| Gerard, P. & Schucany, W. | 2002 | Combining population density estimates in line transect sampling using the kernel method [BibTeX] |
Journal of Agricultural, Biological, and Environmental Statistics 7:233--242 | ||
BibTeX:
@article{Gerard2002,
author = {Gerard, P.D. and Schucany, W.R.},
title = {Combining population density estimates in line transect sampling using the kernel method},
journal = {Journal of Agricultural, Biological, and Environmental Statistics},
year = {2002},
volume = {7},
number = {2},
pages = {233--242}
}
|
|||||
| Gerard, P. D. & Schucany, W. R. | 1999 | Local bandwidth selection for kernel estimation of population densities with line transect sampling [BibTeX] |
Biometrics 55:769--773 | ||
BibTeX:
@article{GerSch99,
author = {Gerard, P. D. and Schucany, W. R.},
title = {Local bandwidth selection for kernel estimation of population densities with line transect sampling},
journal = {Biometrics},
year = {1999},
volume = {55},
pages = {769--773}
}
|
|||||
| Gerdel, K. | 2008 | Leopard (Panthera pardus) prey prediction using line transect sampling in the Western Soutpansberg mountain range, Limpopo province, South Africa [BibTeX] |
: | ||
BibTeX:
@thesis{Gerdel2008,
author = {Katharina Gerdel},
title = {Leopard (\textit{Panthera pardus}) prey prediction using line transect sampling in the Western Soutpansberg mountain range, Limpopo province, South Africa},
school = {University of Tübingen},
year = {2008},
note = {Diploma Thesis in Biology, University of Tübingen}
}
|
|||||
| Gerrodette, T. & Forcada, J. | 2005 | Non-recovery of two spotted and spinner dolphin populations in the eastern tropical Pacific Ocean | Marine Ecology Progress Series 291:1--21 | ||
| Abstract: Populations of northeastern offshore spotted dolphins Stenella attenuata attenuata and eastern spinner dolphins S. longirostris orientalis have been reduced because the dolphins are bycatch in the purse-seine fishery for yellowfin tuna in the eastern tropical Pacific Ocean (the 'tuna-dolphin issue'). Abundance and trends of these dolphin stocks were assessed from 12 large-scale pelagic surveys carried out between 1979 and 2000. Estimates of abundance were based on a multivariate line-transect analysis, using covariates to model the detection process and group size. Current estimates of abundance are about 640 000 northeastern offshore spotted dolphins (CV = 0.17) and 450 000 eastern spinner dolphins (CV = 0.23). For the whole period from 1979 to 2000, annual estimates of abundance ranged from 494 000 to 954 000 for northeastern offshore spotted dolphins and from 271 000 to 734 000 for eastern spinner dolphins. Management actions by USA and international fishing agencies over 3 decades have successfully reduced dolphin bycatch by 2 orders of magnitude, yet neither stock is showing clear signs of recovery. Possible reasons include underreporting of dolphin bycatch, effects of chase and encirclement on dolphin survival and reproduction, long-term changes in the ecosystem, and effects of other species on spotted and spinner dolphin population dynamics. © Inter-Research 2005. | |||||
| Review: Cita Chen | |||||
BibTeX:
@article{GerFor05,
author = {Gerrodette, T. and Forcada, J.},
title = {Non-recovery of two spotted and spinner dolphin populations in the eastern tropical Pacific Ocean},
journal = {Marine Ecology Progress Series},
year = {2005},
volume = {291},
pages = {1--21}
}
|
|||||
| Gerrodette, T. & Forcada, J. | 2002 | Estimates of abundance of western/southern spotted, whitebelly spinner, striped and common dolphins, and pilot, sperm and Bryde's whales in the Eastern Tropical Pacific Ocean [BibTeX] |
: | ||
BibTeX:
@techreport{Gerrodette2002,
author = {Gerrodette,T. and Forcada,J.},
title = {Estimates of abundance of western/southern spotted, whitebelly spinner, striped and common dolphins, and pilot, sperm and Bryde's whales in the Eastern Tropical Pacific Ocean},
year = {2002}
}
|
|||||
| Gerrodette, T., Taylor, B. L., Swift, R., Rankin, S., Jaramillo-Legorreta, A. M. & Rojas-Bracho, L. | 2011 | A combined visual and acoustic estimate of 2008 abundance, and change in abundance since 1997, for the vaquita, Phocoena sinus [BibTeX] |
Marine Mammal Science 27:E79–E100 | DOI | |
BibTeX:
@article{Gerrodette2011,
author = {Gerrodette, Tim and Taylor, Barbara L. and Swift, René and Rankin, Shannon and Jaramillo-Legorreta, Armando M. and Rojas-Bracho, Lorenzo},
title = {A combined visual and acoustic estimate of 2008 abundance, and change in abundance since 1997, for the vaquita, Phocoena sinus},
journal = {Marine Mammal Science},
year = {2011},
volume = {27},
pages = {E79–E100},
doi = {10.1111/j.1748-7692.2010.00438.x}
}
|
|||||
| Gilbert, D. W., Anderson, D. R., Ringelman, J. K. & Szymczak, M. R. | 1996 | Response of nesting ducks to habitat management on the Monte Vista National Wildlife Refuge, Colorado [BibTeX] |
Wildlife Monographs 131:1--44 | ||
BibTeX:
@article{Giletal96,
author = {Gilbert, D. W. and Anderson, D. R. and Ringelman, J. K. and Szymczak, M. R.},
title = {Response of nesting ducks to habitat management on the {M}onte {V}ista {N}ational {W}ildlife {R}efuge, {C}olorado},
journal = {Wildlife Monographs},
year = {1996},
volume = {131},
pages = {1--44}
}
|
|||||
| Gill, R. M. A., Thomas, M. L. & Stocker, D. | 1997 | The use of portable thermal imaging for estimating deer population density in forest habitats | Journal of Applied Ecology 34:1273--1286 | ||
| Abstract: 1. The reliability of deer population management could be improved with good density estimates, but current methods are either labour-intensive or suffer from uncertainties regarding accuracy. 2. Visibility varies substantially in forests depending on stand type, age and understorey vegetation. In such conditions distance sampling would be an efficient estimation method, but observer disturbance often results in bias when the method is applied to deer. 3. The performance of thermal imaging for estimating deer density by distance sampling was assessed in seven forest deer populations. Thermal imaging equipment can detect the long-wave energy radiated by natural objects, clearly revealing warm-bodied animals even if partly obscured by vegetation. 4. Many more deer were detected at night using a thermal imager than along the same transect routes in daytime. Detection distances were correlated with visibility but were substantially longer than the average distances at which most animals were disturbed. Most deer were detected without causing prior disturbance. 5. Densities were estimated with a coefficient of variation ranging from 10.2-28.4%. Precision depended on sampling effort and sample sizes obtained. 6. A Monte Carlo simulation revealed a quadratic relationship between accuracy and visibility, with accuracy increasing with average visibility and a tendency for deer to select more open habitats within a forest. Under conditions that are likely to be typical of temperate forests (< 40% thicket and neutral selection, or < 70% thicket if thicket is avoided), accuracy was generally good and changed relatively little in relation to visibility and habitat selection. 7. Likely sources of bias as well as alternatives to thermal imaging are discussed. It is concluded that the method would be suitable for estimating ungulate densities in forests with an adequate network of tracks. | |||||
BibTeX:
@article{Gill1997,
author = {Gill, R. M. A. and Thomas, M. L. and Stocker, D.},
title = {The use of portable thermal imaging for estimating deer population density in forest habitats},
journal = {Journal of Applied Ecology},
year = {1997},
volume = {34},
number = {5},
pages = {1273--1286}
}
|
|||||
| Gilles, A., Adler, S., Kaschner, K., Scheidat, M. & Siebert, U. | 2011 | Modelling harbour porpoise seasonal density as a function of the German Bight environment: implications for management [BibTeX] |
Endangered Species Research 14:157--169 | ||
BibTeX:
@article{Gilles2011,
author = {Gilles, A and Adler, S and Kaschner, K and Scheidat, M and Siebert, U},
title = {Modelling harbour porpoise seasonal density as a function of the German Bight environment: implications for management},
journal = {Endangered Species Research},
year = {2011},
volume = {14},
pages = {157--169}
}
|
|||||
| Gilles, A., Scheidat, M. & Siebert, U. | 2009 | Seasonal distribution of harbour porpoises and possible interference of offshore wind farms in the German North Sea [BibTeX] |
Marine Ecology Progress Series 383:295--307 | ||
BibTeX:
@article{Gilles2009,
author = {Anita Gilles and Meike Scheidat and Ursula Siebert},
title = {Seasonal distribution of harbour porpoises and possible interference of offshore wind farms in the German North Sea},
journal = {Marine Ecology Progress Series},
year = {2009},
volume = {383},
pages = {295--307}
}
|
|||||
| Gillings, S., Fuller, R. J. & Henderson, A. C. B. | 1998 | Avian community composition and patterns of bird distribution within birch-heath mosaics in north-east Scotland | Ornis Fennica 75:27--37 | ||
| Abstract: Territory mapping and transect counts were made in upland birch scrub (46 ha) in north-east Scotland to document the bird community and assess responses of birds to habitat variation. The bird community was species poor, supporting approximately 20 species. Richness and diversity were low compared with other British scrub habitats. The two dominant species were Willow Warbler (52% of territory mapping registra-tions) and Chaffinch (18% of registrations). Densities derived from territory mapping and transect counts (Distance sampling) were similar. Willow Warbler densities were high and comparable with preferred habitats in lowland England and Fennoscandia. Contour mapping, correlation and canonical correspondence analysis demonstrated that successional stage, represented by birch cover, was the single most important factor determining community composition and individual species' distributions. Meadow Pipits persisted at low densities in sparse birch; Tree Pipits occurred through-out the range of birch densities. Willow Warblers preferred areas of medium height birch at intermediate canopy cover. Wren, Great Tit and Long-tailed Tit occurred in older birch scrub. The relatively simple bird-habitat relationships reported are con-trasted with more complex patterns elsewhere. These findings are discussed in the context of scrub and woodland regeneration in upland Britain with particular reference to mosaics and maintenance of avian diversity. | |||||
BibTeX:
@article{Gillings1998,
author = {Gillings, S. and Fuller, R. J. and Henderson, A. C. B.},
title = {Avian community composition and patterns of bird distribution within birch-heath mosaics in north-east Scotland},
journal = {Ornis Fennica},
year = {1998},
volume = {75},
number = {1},
pages = {27--37}
}
|
|||||
| Giunchi, D., Gaggini, V. & Baldaccini, N. | 2007 | Distance sampling as an effective method for monitoring feral pigeon (Columba livia f. domesticaa) urban populations | Urban Ecosystems 10:397--412 | ||
| Abstract: Abstract Current methods for estimating feral pigeon (Columba livia f. domestica) population size and for monitoring population trends are mainly based on indices, which according to the current literature on wildlife census methods often produce biased results. Distance Sampling techniques have never been used in this context, even though they could theoretically produce absolute abundance estimates at relatively low costs. The aim of this paper was to investigate the performance of Distance Sampling to census feral pigeons, and to compare these results with those obtained by using Quadrate Counts, a widespread method for monitoring these birds. Surveys were performed in Pisa (Italy) in two different periods of the year 2004 (end of January–beginning of February, and November), which correspond to minimum (January–February) and maximum (November) numbers for pigeon populations. We considered 40 line transects each about 250 m long for Distance Sampling, and 40 250 � 250 m cells for Quadrate Counts. In both cases, sampling units were randomized in a stratified design. In contrast to Quadrate Counts, Distance Sampling detected the predicted increase of abundance from January–February to November with an acceptable precision and no increase of costs per survey. Even though the possible biases (due to the not rigorously random distribution of transects and to the spiked nature of collected distance data) should be further investigated, results suggest that Distance Sampling is a viable and efficient alternative to the traditional methods used to estimate feral pigeons population size and to monitor trends. | |||||
BibTeX:
@article{Giunchi2007,
author = {Giunchi, Dimitri and Gaggini, Valentina and Baldaccini, N.},
title = {Distance sampling as an effective method for monitoring feral pigeon (\textit{ Columba livia f. domestica}) urban populations},
journal = {Urban Ecosystems},
year = {2007},
volume = {10},
pages = {397--412}
}
|
|||||
| Gogan, P. J., Thompson, S. C., Pierce, W. & Barrett, R. H. | 1986 | Line-transect censuses of fallow and black-tailed deer on the Point Reyes Peninsula [BibTeX] |
California Game and Fish 72:47--61 | ||
BibTeX:
@article{Gogetal86,
author = {Gogan, P. J. and Thompson, S. C. and Pierce, W. and Barrett, R. H.},
title = {Line-transect censuses of fallow and black-tailed deer on the {P}oint {R}eyes {P}eninsula},
journal = {California Game and Fish},
year = {1986},
volume = {72},
pages = {47--61}
}
|
|||||
| Goldberg, C. & Schwalbe, C. | 2004 | Considerations for monitoring a rare anuran (Eleutherodactylus augusti) | Southwestern Naturalist 49:442--448 | ||
| Abstract: Monitoring wildlife populations is a challenging task for scientists and resource managers. We assessed 4 methods for monitoring population size of barking frogs (Eleutherodactylus augusti) in southern Arizona: mark-recapture, distance sampling, call counts, and visual encounter surveys. Because of the ecology and behavior of this species, all methods produced data that contained too much variability and bias to be useful for monitoring population size. For cryptic species such as barking frogs, monitoring programs might be more effective if they focus on parameters other than population size. | |||||
BibTeX:
@article{Goldberg2004,
author = {Goldberg, C.S. and Schwalbe, C.R.},
title = {Considerations for monitoring a rare anuran \textit{(Eleutherodactylus augusti)}},
journal = {Southwestern Naturalist},
year = {2004},
volume = {49},
number = {4},
pages = {442--448}
}
|
|||||
| Gong, R.-B., Ma, Y.-B. & Zhou, Y. | 2009 | Confident estimation for density of a biological population based on line transect sampling [BibTeX] |
Acta Mathematicae Applicatae Sinica 26:79-92 | URL | |
BibTeX:
@article{Gong200979,
author = {Gong, R.-B. and Ma, Y.-B. and Zhou, Y.},
title = {Confident estimation for density of a biological population based on line transect sampling},
journal = {Acta Mathematicae Applicatae Sinica},
year = {2009},
volume = {26},
number = {1},
pages = {79-92},
note = {cited By (since 1996) 0},
url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-72249086182&partnerID=40&md5=19cbe1a3cf9498632cc0ca485cefc7f8}
}
|
|||||
| Good, R. E., Nielson, R. M., Sawyer, H. H. & McDonald, L. L. | 2004 | Population Level Survey of Golden Eagles (Aquila chrysaetos) in the Western United States [BibTeX] |
: | ||
BibTeX:
@techreport{Good2004,
author = {Good, R. E., and Nielson, R. M., and Sawyer, H. H., and McDonald, L. L.},
title = {Population Level Survey of Golden Eagles \textit{(Aquila chrysaetos)} in the Western United States},
year = {2004}
}
|
|||||
| Gordon, J. | 2001 | Measuring the range to animals at sea from boats using photographic and video images [BibTeX] |
Journal of Applied Ecology 38:879--887 | ||
BibTeX:
@article{GOR01,
author = {Gordon,J.},
title = {Measuring the range to animals at sea from boats using photographic and video images},
journal = {Journal of Applied Ecology},
year = {2001},
volume = {38},
pages = {879--887}
}
|
|||||
| Gosselin, J.-F. | 2005 | Abundance indices of belugas in James Bay and eastern Hudson Bay in summer 2004 [BibTeX] |
: | ||
BibTeX:
@techreport{Gosselin2005,
author = {Jean-François Gosselin},
title = {Abundance indices of belugas in James Bay and eastern Hudson Bay in summer 2004},
year = {2005},
number = {2005/011}
}
|
|||||
| Gotmark, F. & Post, P. | 1996 | Prey selection by sparrowhawks, Accipiter nisus: relative predation risk for breeding passerine birds in relation to their size, ecology and behaviour [BibTeX] |
Philosophical Transactions of the Royal Society of London B 351:1559--1577 | ||
BibTeX:
@article{GotPos96,
author = {Gotmark, F. and Post, P.},
title = {Prey selection by sparrowhawks, \emph{{A}ccipiter nisus}: relative predation risk for breeding passerine birds in relation to their size, ecology and behaviour},
journal = {Philosophical Transactions of the Royal Society of London B},
year = {1996},
volume = {351},
pages = {1559--1577}
}
|
|||||
| Gottschalk, T. & Huettmann, F. | 2011 | Comparison of distance sampling and territory mapping methods for birds in four different habitats [BibTeX] |
Journal of Ornithology 152:421-429 | URL | |
BibTeX:
@article{Gottschalk2011,
author = {Gottschalk, Thomas and Huettmann, Falk},
title = {Comparison of distance sampling and territory mapping methods for birds in four different habitats},
journal = {Journal of Ornithology},
year = {2011},
volume = {152},
pages = {421-429},
url = {http://dx.doi.org/10.1007/s10336-010-0601-1}
}
|
|||||
| Graham, A. & Bell, R. | 1989 | Investigating observer bias in aerial survey by simultaneous double-counts [BibTeX] |
Journal of Wildlife Management 53:1009--1016 | ||
BibTeX:
@article{GraBel89,
author = {Graham, A. and Bell, R.},
title = {Investigating observer bias in aerial survey by simultaneous double-counts},
journal = {Journal of Wildlife Management},
year = {1989},
volume = {53},
pages = {1009--1016}
}
|
|||||
| Granholm, S. L. | 1983 | Bias in density estimates due to movement of birds [BibTeX] |
Condor 85:243--248 | ||
BibTeX:
@article{Gra83,
author = {Granholm, S. L.},
title = {Bias in density estimates due to movement of birds},
journal = {Condor},
year = {1983},
volume = {85},
pages = {243--248}
}
|
|||||
| Granjon, L., Cosson, J. F., Judas, J. & Ringuet, S. | 1996 | Influence of tropical rainforest fragmentation on mammal communities in French Guiana: short-term effects. [BibTeX] |
Acta Oecologica 17:673--684 | ||
BibTeX:
@article{Graetal96,
author = {Granjon, L. and Cosson, J. F. and Judas, J. and Ringuet, S.},
title = {Influence of tropical rainforest fragmentation on mammal communities in {F}rench {G}uiana: short-term effects.},
journal = {Acta Oecologica},
year = {1996},
volume = {17},
pages = {673--684}
}
|
|||||
| Grant, T. J. & Doherty, P. F. | 2007 | Monitoring of the flat-tailed horned lizard with methods incorporating detection probability | Journal of Wildlife Management 71:1050--1056 | URL | |
| Abstract: Difficulty in monitoring the flat-tailed horned lizard (Phrynosoma mcallii) has led to controversy over its conservation status. The difficulty in detecting this species has discouraged large-scale estimates of abundance and led to uncertainty over whether the species exists in population sizes of sufficient size for long-term persistence. We incorporated detection probability into monitoring of this species using closed mark–recapture and distance-sampling methods. Density estimation from mark–recapture abundance estimates was improved using an estimate of the proportion of time lizards were on the plot. We estimated the probability of detection on the line for distance sampling and adjusted density estimates accordingly. We estimated the populations of the Yuha Basin Management Area in 2002 and the East Mesa Management Area, Imperial County, California, USA, in 2003 to be 25,514 (95% CI 14,444–38,970) and 42,619 (95% CI 23,161–67,639), respectively. Two estimates of detection probability on the line in distance sampling by different methods were 0.45 and 0.65. Density estimates derived from distance analyses for 3 East Mesa Management Area plots and the Yuha Basin Management Area were 1.55 per ha (95% CI 0.64–3.76) and 0.41 per ha (95% CI 0.22–0.7), respectively. These are the first large-scale estimates of abundance and density for P. mcallii. | |||||
BibTeX:
@article{GRANT2007,
author = {Grant, Tyler J. And Doherty, Paul F.},
title = {Monitoring of the flat-tailed horned lizard with methods incorporating detection probability},
journal = {Journal of Wildlife Management},
year = {2007},
volume = {71},
number = {4},
pages = {1050--1056
},
url = {http://dx.doi.org/10.2193%2F2005-681}
}
|
|||||
| Greene, T. | Distance sampling populations of New Zealand birds - Estimating kaka and kereru abundance [BibTeX] |
: | |||
BibTeX:
@unpublished{Greene,
author = {Terry Greene},
title = {Distance sampling populations of New Zealand birds - Estimating kaka and kereru abundance}
}
|
|||||
| Gregory, R. D. & Baillie, S. R. | 1998 | Large-scale habitat use of some declining British birds | Journal of Applied Ecology 35:785--799 | ||
| Abstract: 1. Large-scale habitat use of eight species of breeding birds was considered using data collected across Britain. The species were skylark Alauda arvensis (L.), dunnock Prunella modularis (L.), blackbird Turdus merula (L.), song thrush Turdus philomelos (L.), starling Sturnus vulgaris (L.), linnet Carduelis cannabina (L.), bullfinch Pyrrhula pyrrhula (L.) and reed bunting Emberiza schoeniclus (L.). All are linked by roughly synchronous population declines over the last 25 years in southern Britain (and mostly in farmland landscapes). Discussion is limited to the conservation status of these species. 2. Breeding densities were estimated for broad habitat types and these were used to estimate population sizes within habitat types. Confidence limits on the estimates were derived using a bootstrap procedure. 3. For most species considered, farmland holds a high proportion of their population (in excess of 50% for four species), reflecting the predominance of this land use across Britain. This suggests that sympathetic changes in farming practices are likely to provide the best mechanism for improving the status of these species. 4. Substantial proportions of particular species occur outside farmland, but different species occur in different habitats. A considerable proportion of skylarks occur on upland moor, bullfinches in wooded habitats, and reed buntings in riparian habitats. Conservation of this group of species thus requires appropriate management of the wider countryside, including their main habitats. 5. Habitats associated with human habitation hold > 20% of the British populations of blackbird, song thrush and starling, and considerable numbers of other species. The management of parks, gardens and other 'green space' may have an important impact on their populations and should not be neglected by conservationists. | |||||
BibTeX:
@article{Gregory1998,
author = {Gregory, R. D. and Baillie, S. R.},
title = {Large-scale habitat use of some declining British birds},
journal = {Journal of Applied Ecology},
year = {1998},
volume = {35},
number = {5},
pages = {785--799}
}
|
|||||
| Gregory, S. K. | 2005 | Comparison of density estimators for white-tailed deer using aerial thermal infrared videography [BibTeX] |
: | ||
BibTeX:
@mastersthesis{Gregory2005,
author = {Gregory, S. K.},
title = {Comparison of density estimators for white-tailed deer using aerial thermal infrared videography},
school = {University of Arkansas},
year = {2005}
}
|
|||||
| Grigg, G. C., Pople, A. R. & Beard, L. A. | 1997 | Application of an ultralight aircraft to aerial surveys of kangaroos on grazing properties [BibTeX] |
Wildlife Research 24:359--372 | ||
BibTeX:
@article{Grietal97,
author = {Grigg, G. C. and Pople, A. R. and Beard, L. A.},
title = {Application of an ultralight aircraft to aerial surveys of kangaroos on grazing properties},
journal = {Wildlife Research},
year = {1997},
volume = {24},
pages = {359--372}
}
|
|||||
| Gross, J. E., Stoddart, L. C. & Wagner, F. H. | 1974 | Demographic analysis of a northern Utah jackrabbit population [BibTeX] |
Wildlife Monographs 40:1--68 | ||
BibTeX:
@article{Groetal74,
author = {Gross, J. E. and Stoddart, L. C. and Wagner, F. H.},
title = {Demographic analysis of a northern {U}tah jackrabbit population},
journal = {Wildlife Monographs},
year = {1974},
volume = {40},
pages = {1--68}
}
|
|||||
| Guenzel, R. J. | 1997 | Estimating pronghorn abundance using aerial line transect sampling [BibTeX] |
: | ||
BibTeX:
@techreport{Gue97,
author = {Guenzel, R. J.},
title = {Estimating pronghorn abundance using aerial line transect sampling},
year = {1997}
}
|
|||||
| Guix, J. C., Martín, M. & Manõsa, S. | 1999 | Conservation status of parrot populations in an Atlantic rainforest area of southeastern Brazil | Biodiversity and Conservation 8:1079--1088 | ||
| Abstract: A census of four species of syntopic parrots was carried out using distance sampling methods on Sao Sebastiao island, SE Brazil. Most of the 33 593 ha island is covered by mature and secondary Atlantic rainforest. Almost 80% of these forests are within the Ilhabela Park. Although the species counted have marked differences in size and weight, density (individuals/km2) and estimated population size in 23 500 ha of well-preserved forests were similar: Amazona farinosa (13.82 ± 5.94; 3247 ± 1395), Pionus maximiliani (15.79 ± 7.04; 3712 ± 1654), Brotogeris tirica (15.05 ± 4.87; 3537 ± 1143) and Pyrrhura frontalis (13.06 ± 5.53; 3068 ± 1298). Encounter rates of Forpus crassirostris and Pionopsitta pileata were very low, which suggests that there is only a small population of these species on the island. The Sao Sebastiao forests still support healthy populations of parrots. Although woodpecker population estimates on the island are large enough to provide nesting sites for parrots, competition for holes with other secondary cavity nesters such as toucans, flycatchers and tytiras, and the selective cutting of dead trees for canoe construction, which is a common practice on the island, may limit hole availability for parrots. | |||||
BibTeX:
@article{Guix1999,
author = {Guix, J. C. and Mart{\'i}n, M. and Man{\~o}sa, S.},
title = {Conservation status of parrot populations in an Atlantic rainforest area of southeastern Brazil},
journal = {Biodiversity and Conservation},
year = {1999},
volume = {8},
number = {8},
pages = {1079--1088}
}
|
|||||
| Gunnlaugsson, T. & Sigurjónsson, J. | 1990 | NASS-87: estimation of whale abundance based on observations made on board Icelandic and Faroese survey vessels [BibTeX] |
Report of the International Whaling Commission 40:571--580 | ||
BibTeX:
@article{GunSig90,
author = {Gunnlaugsson, Th. and Sigurj\'onsson, J.},
title = {{NASS}-87: estimation of whale abundance based on observations made on board {I}celandic and {F}aroese survey vessels},
journal = {Report of the International Whaling Commission},
year = {1990},
volume = {40},
pages = {571--580}
}
|
|||||
| Gunnlaugsson, T., Víkingsson, G. & Pike, D. | 2009 | Combined line-transect and cue-count estimate of sperm whale abundance in the North Atlantic, from Icelandic NASS-2001 shipboard survey [BibTeX] |
NAMMCO Sci. Publ. 7:73--80. | ||
BibTeX:
@article{Gunnlaugsson2009,
author = {Gunnlaugsson, Th. and Víkingsson, G.A. and Pike, D.G.},
title = {Combined line-transect and cue-count estimate of sperm whale abundance in the North Atlantic, from Icelandic NASS-2001 shipboard survey},
journal = {NAMMCO Sci. Publ.},
year = {2009},
volume = {7},
pages = {73--80.}
}
|
|||||
| Gurnell, J., Lurz, P. & Pepper, H. | 2001 | Practical techniques for surveying and monitoring squirrels [BibTeX] |
: | ||
BibTeX:
@techreport{Gurnell2001,
author = {Gurnell, J. and Lurz,P. and H. Pepper},
title = {Practical techniques for surveying and monitoring squirrels},
year = {2001}
}
|
|||||
| Guthery, F. S. | 1988 | Line transect sampling of bobwhite density on rangeland: evaluation and recommendations [BibTeX] |
Wildlife Society Bulletin 16:193--203 | ||
BibTeX:
@article{Gut88,
author = {Guthery, F. S.},
title = {Line transect sampling of bobwhite density on rangeland: evaluation and recommendations},
journal = {Wildlife Society Bulletin},
year = {1988},
volume = {16},
pages = {193--203}
}
|
|||||
| Guthery, F. S. & Mecozzi, G. E. | 2008 | Developing the concept of estimating bobwhite density with pointing dogs [BibTeX] |
Journal of Wildlife Management 72:1175--1180 | ||
BibTeX:
@article{Guthery2008,
author = {Fred S. Guthery and Grant E. Mecozzi},
title = {Developing the concept of estimating bobwhite density with pointing dogs},
journal = {Journal of Wildlife Management},
year = {2008},
volume = {72},
pages = {1175--1180}
}
|
|||||
| Gutzwiller, K. J. & Marcum, H. A. | 1997 | Bird reactions to observer clothing color: Implications for distance-sampling techniques | Journal of Wildlife Management 61:935--947 | ||
| Abstract: The species-confidence hypothesis asserts that birds prefer mates whose colors match those of their species and avoid potential mates whose colors are atypical of conspecifics. Earlier point-count research indicated this mate-choice hypothesis also may explain avian reactions to observer clothing color. In central Texas, during January and February 1993, we tested further whether the species-confidence hypothesis holds for reactions to observer clothing color by determining how close an investigator could get to individuals before they flushed (approach distance) and how long individuals remained visible near their initial flush point (detectability period). The same investigator experimentally wore or did not wear a hunter-orange vest, which some wildlife biologists wear as a safety precaution during hunting-season field studies. The vest did not affect approach distance for species with red or orange on their bodies (American robin [Turdus migratorius], P = 0.247; northern cardinal [Cardinalis cardinalis], P = 0.196: ruby-crowned kinglet [Regulus calendula], P = 0.434; red-bellied woodpecker [Melanerpes carolinus], P = 0.113). In contrast, approach distances for species without red or orange were longer when the vest was worn than when it was not worn (Carolina chickadee [Parus carolinensis], P = 0.032; northern mockingbird [Mimus polyglottos], P = 0.033; yellow-rumped warbler [Dendroica coronata], P = 0.001). Differences in detectability period between vest conditions depended on air temperature for American robins (P = 0.003) and on the variation in visibility within habitats for northern cardinals (P < 0.001). Detectability period was shorter when the vest was worn than when it was not worn for Carolina chickadees (P = 0.057) and yellow-rumped warblers (P = 0.060). Thus, for several species this matechoice hypothesis seems to apply to garment color as well. Some species' reactions demonstrated that, if birds respond significantly to clothing color, important assumptions of distance-sampling techniques used to estimate avian richness, density, and abundance will be violated, and these parameters will be underestimated. Wildlife scientists will be more likely to draw valid inferences and recommend effective management practices from avian data gathered via distance-sampling methods if reactions to clothing color are precluded. | |||||
BibTeX:
@article{Gutzwiller1997,
author = {Gutzwiller, K. J. and Marcum, H. A.},
title = {Bird reactions to observer clothing color: Implications for distance-sampling techniques},
journal = {Journal of Wildlife Management},
year = {1997},
volume = {61},
number = {3},
pages = {935--947}
}
|
|||||
| Gómez De Segura, A., Tomás, J., Pedraza, S. N., Crespo, E. A. & Raga, J. A. | 2003 | Preliminary patterns of distribution and abundance of loggerhead sea turtles, Caretta caretta, around Columbretes Islands Marine Reserve, Spanish Mediterranean [BibTeX] |
Marine Biology 143:817--823 | ||
BibTeX:
@article{Gomez2003,
author = {G{\'o}mez De Segura, A. and Tom{\'a}s, J. and Pedraza, S. N. and Crespo, E. A. and Raga, J. A.},
title = {Preliminary patterns of distribution and abundance of loggerhead sea turtles, \textit{Caretta caretta}, around Columbretes Islands Marine Reserve, Spanish Mediterranean},
journal = {Marine Biology},
year = {2003},
volume = {143},
number = {4},
pages = {817--823}
}
|
|||||
| Högmander, H. | 1995 | Methods of Spatial Statistics in Monitoring Wildlife Populations [BibTeX] |
: | ||
BibTeX:
@phdthesis{Hog95,
author = {H\"{o}gmander, H.},
title = {Methods of Spatial Statistics in Monitoring Wildlife Populations},
school = {University of Jyv\"{a}skyl\"{a}},
year = {1995}
}
|
|||||
| Högmander, H. | 1991 | A random field approach to transect counts of wildlife populations [BibTeX] |
Biometrical Journal 33:1013--1023 | ||
BibTeX:
@article{Hog91,
author = {H\"{o}gmander, H.},
title = {A random field approach to transect counts of wildlife populations},
journal = {Biometrical Journal},
year = {1991},
volume = {33},
pages = {1013--1023}
}
|
|||||
| Hagen, G. & Schweder, T. | 1995 | Point clustering of minke whales in the northeastern Atlantic [BibTeX] |
Whales, Seals, Fish and Man :27--33 | ||
BibTeX:
@incollection{HagSch95,
author = {Hagen, G. and Schweder, T.},
title = {Point clustering of minke whales in the northeastern {A}tlantic},
booktitle = {Whales, Seals, Fish and Man},
publisher = {Elsevier Science B. V.},
year = {1995},
pages = {27--33}
}
|
|||||
| Hain, J. H. W., Ellis, S. L., Kenney, R. D. & Slay, C. K. | 1999 | Sightability of right whales in coastal waters of the southeastern United States with implications for the aerial monitoring program [BibTeX] |
Marine Mammal Survey and Assessment Methods :191--207 | ||
BibTeX:
@incollection{Haietal99,
author = {Hain, J. H. W and Ellis, S. L and Kenney, R. D. and Slay, C. K.},
title = {Sightability of right whales in coastal waters of the southeastern {U}nited {S}tates with implications for the aerial monitoring program},
booktitle = {Marine Mammal Survey and Assessment Methods},
publisher = {Balkema},
year = {1999},
pages = {191--207}
}
|
|||||
| Hakamada, T., Matsuoka, K. & Nishiwaki, S. | 2005 | An update of Antarctic minke whales abundance estimate based on JARPA data including comparison to IDCR/SOWER estimates [BibTeX] |
: | ||
BibTeX:
@techreport{Hakamada2005,
author = {Hakamada, T. and Matsuoka, K. and S. Nishiwaki},
title = {An update of {Antarctic minke whales abundance estimate based on JARPA data including comparison to IDCR/SOWER estimates}},
year = {2005},
number = {JA/J05/JR 4}
}
|
|||||
| Hall, A. M. | 2004 | Seasonal abundance, distribution and prey species of harbour porpoise (Phocoena phocoena) in Southern Vancouver Island waters [BibTeX] |
: | ||
BibTeX:
@mastersthesis{Hall2004,
author = {Hall, A. M.},
title = {Seasonal abundance, distribution and prey species of harbour porpoise (Phocoena phocoena) in Southern Vancouver Island waters},
school = {University of British Columbia},
year = {2004}
}
|
|||||
| Hamel, P. B. | 1990 | Response to Tomiatojc and Verner [BibTeX] |
The Auk 107:451--453 | ||
BibTeX:
@article{Ham90,
author = {Hamel, P. B.},
title = {Response to {T}omiatojc and {V}erner},
journal = {The Auk},
year = {1990},
volume = {107},
pages = {451--453}
}
|
|||||
| Hamel, P. B. | 1984 | Comparison of variable circular-plot and spot-map censusing methods in temperate forest [BibTeX] |
Ornis Scandinavica 15:266--274 | ||
BibTeX:
@article{Ham84,
author = {Hamel, P. B.},
title = {Comparison of variable circular-plot and spot-map censusing methods in temperate forest},
journal = {Ornis Scandinavica},
year = {1984},
volume = {15},
pages = {266--274}
}
|
|||||
| Hamel, P. B., Smith, W. P. & Wahl, J. W. | 1993 | Wintering bird populations of fragmented forest habitat in the Central Basin, Tennessee [BibTeX] |
Biological Conservation 66:107--115 | ||
BibTeX:
@article{Hametal93,
author = {Hamel, P. B. and Smith, W. P. and Wahl, J. W.},
title = {Wintering bird populations of fragmented forest habitat in the {C}entral {B}asin, {T}ennessee},
journal = {Biological Conservation},
year = {1993},
volume = {66},
pages = {107--115}
}
|
|||||
| Hammond, P. S. | 1984 | An investigation into the effects of different techniques of smearing the IWC/IDCR minke whale sighting data and the use of different models to estimate density of schools [BibTeX] |
Report of the International Whaling Commission 34:301--307 | ||
BibTeX:
@article{Hamm84,
author = {Hammond, P. S.},
title = {An investigation into the effects of different techniques of smearing the {IWC/IDCR} minke whale sighting data and the use of different models to estimate density of schools},
journal = {Report of the International Whaling Commission},
year = {1984},
volume = {34},
pages = {301--307}
}
|
|||||
| Hammond, P. S., Berggren, P., Benke, H., Borchers, D. L., Collet, A., Heide-Jørgensen, M. P., Heimlich, S., Hiby, A. R., Leopold, M. F. & Øien, N. | 2002 | Abundance of Harbour Porpoise and Other Cetaceans in the North Sea and Adjacent Waters | The Journal of Applied Ecology 39:361--376 | ||
| Abstract: 1. The status of small cetaceans in the North Sea and adjacent waters has been of concern for many years. Shipboard and aerial line transect surveys were conducted to provide accurate and precise estimates of abundance as a basis for conservation strategy in European waters. 2. The survey, known as SCANS (Small Cetacean Abundance in the North Sea), was conducted in summer 1994 and designed to generate precise and unbiased abundance estimates. Thus the intensity of survey was high, and data collection and analysis methods allowed for the probability of detection of animals on the transect line being less than unity and, for shipboard surveys, also allowed for animal movement in response to the survey platform. 3. Shipboard transects covered 20 000 km in an area of 890 000 km$^2$. Aerial transects covered 7000 km in an area of 150 000 km$^2$. 4. Three species dominated the data. Harbour porpoise Phocoena phocoena were encountered throughout the survey area except in the Channel and the southern North Sea. Whitebeaked dolphin Lagenorhynchus albirostris and minke whale Balaenoptera acutorostrata were found mainly in the north-western North Sea. 5. Phocoena phocoena abundance for the entire survey area was estimated as 341 366 [coefficient of variation (CV) = 0.14; 95% confidence interval (CI) = 260 000-449 000]. The estimated number of B. acutorostrata was 8445 (CV = 0.24; 95% CI 5000-13 500). The estimate for L. albirostris based on confirmed sightings of this species was 7856 (CV = 0.30; 95% CI = 4000-13 000). When Atlantic whitesided dolphin Lagenorhynchus acutus and Lagenorhynchus spp. sightings were included, this estimate increased to 11 760 (CV = 0.26; 95% CI 5900-18 500). 6. Shortbeaked common dolphin Delphinus delphis were found almost exclusively in the Celtic Sea. Abundance was estimated as 75 450 (CV = 0.67; 95% CI = 23 000-149 000). 7. Current assessments and recommendations by international fora concerning the impact on P. phocoena of bycatch in gillnet fisheries in the North Sea and adjacent waters are based on these estimates. | |||||
BibTeX:
@article{Hammond2002,
author = {Hammond, P. S. and Berggren, P. and Benke, H. and Borchers, D. L. and Collet, A. and Heide-J{\o}rgensen, M. P. and Heimlich, S. and Hiby, A. R. and Leopold, M. F. and {\O}ien, N.},
title = {Abundance of Harbour Porpoise and Other Cetaceans in the North Sea and Adjacent Waters},
journal = {The Journal of Applied Ecology},
year = {2002},
volume = {39},
pages = {361--376}
}
|
|||||
| Hammond, P. S. & Laake, J. L. | 1984 | Estimates of sperm whale density in the eastern tropical Pacific, 1974--1982 [BibTeX] |
Report of the International Whaling Commission 34:255--258 | ||
BibTeX:
@article{HamLaa84,
author = {Hammond, P. S. and Laake, J. L.},
title = {Estimates of sperm whale density in the eastern tropical {P}acific, 1974--1982},
journal = {Report of the International Whaling Commission},
year = {1984},
volume = {34},
pages = {255--258}
}
|
|||||
| Hammond, P. S. & Laake, J. L. | 1983 | Trends in estimates of abundance of dolphins (Stenella spp. and Delphinus delphis) involved in the purse-seine fishery for tunas in the eastern Pacific Ocean [BibTeX] |
Report of the International Whaling Commission 33:565--588 | ||
BibTeX:
@article{HamLaa83,
author = {Hammond, P. S. and Laake, J. L.},
title = {Trends in estimates of abundance of dolphins (\emph{{S}tenella} spp. and \emph{{D}elphinus delphis}) involved in the purse-seine fishery for tunas in the eastern {P}acific {O}cean},
journal = {Report of the International Whaling Commission},
year = {1983},
volume = {33},
pages = {565--588}
}
|
|||||
| Hamrick, R., Pirgalioglu, T., Gunduz, S. & Carroll, J. | 2005 | Feral donkey Equus asinus populations on the Karpaz peninsula, Cyprus | European Journal of Wildlife Research 51:108--116 | ||
| Abstract: Numerous researchers have documented the adverse effects of feral donkeys Equus asinus introduced to semi-arid ecosystems. With the release of feral donkeys and potential increasing populations in natural habitats in northern Cyprus, there is concern for negative impacts on vegetation and native species. In the north of the island, there has been only one published study of feral donkey populations, and population estimators were relatively subjective. We estimated feral donkey populations on the Karpaz Peninsula using line transect surveys and quantitative distance sampling estimators. We stratified the sampling by using 11 sample units within the study area. We evaluated potential biases associated with habitat, topography, and perpendicular distance from the transect line and found that these variables did not bias donkey detections during our surveys. Using program DISTANCE, we found that a hazard rate cosine model was the best model that described our distance data based on model selection criterion (Akaike's Information Criteria adjusted for small sample bias). Estimated effective strip width was 280.19 m and detection probability was 0.47 with this model. Estimated donkey density was 6.7 donkeys/km 2, and estimated total abundance was 800 donkeys for the entire 132.5 km2 study area. Of 95 donkey groups detected: 16% were detected in agricultural habitats with flat topography, 9% were detected in agricultural habitats with sloped topography, 24% were detected in shrub/forest habitats with flat topography, and 51% were detected in shrub/forest habitats with sloped topography. Of 102 behavioral observations recorded (multiple behaviors were detected in groups), frequencies of behaviors were 1% bedded, 70% standing, 22% grazing, 6% moving, and 2% other. Our estimated donkey population density in the Karpaz Peninsula was >2 times densities reported in arid regions of the United States and Australia, but slightly lower than earlier density estimates reported for the Karpaz region. These estimates of feral donkey populations in the Karpaz Peninsula provide a quantitative baseline from which to make population management decisions. © Springer-Verlag 2005. | |||||
BibTeX:
@article{Hamrick2005,
author = {Hamrick, R.G. and Pirgalioglu, T. and Gunduz, S. and Carroll, J.P.},
title = {Feral donkey \textit{Equus asinus} populations on the Karpaz peninsula, Cyprus},
journal = {European Journal of Wildlife Research},
year = {2005},
volume = {51},
number = {2},
pages = {108--116}
}
|
|||||
| Handel, C., Tibbetts, L., Cady, M., Ruthrauff, D. & Thompson, B. | Quantifying and Correcting Measurement Error in Point Transect Counts [BibTeX] |
: | |||
BibTeX:
@talk{Handel,
author = {Colleen Handel and Lee Tibbetts and Melissa Cady and Dan Ruthrauff and Bill Thompson},
title = {Quantifying and Correcting Measurement Error in Point Transect Counts}
}
|
|||||
| Hanni, D. | 2005 | Sand Creek Massacre national historic site inventory and monitoring: final report [BibTeX] |
: | ||
BibTeX:
@techreport{Hanni2005,
author = {David Hanni},
title = {Sand Creek Massacre national historic site inventory and monitoring: final report},
year = {2005}
}
|
|||||
| Hanowski, J. M. & Niemi, G. J. | 1995 | Experimental Design Considerations for Establishing an Off-Road, Habitat-Specific Bird Monitoring Program Using Point-Counts [BibTeX] |
: | ||
BibTeX:
@techreport{Hanowski1995,
author = {JoAnn M. Hanowski and Gerald J. Niemi},
title = {Experimental Design Considerations for Establishing an Off-Road, Habitat-Specific Bird Monitoring Program Using Point-Counts},
year = {1995},
number = {PSW-GTR-149}
}
|
|||||
| Hanowski, J. M., Niemi, G. J. & Blake, J. G. | 1990 | Statistical perspectives and experimental design when counting birds on line transects [BibTeX] |
Condor 92:326--335 | ||
BibTeX:
@article{Hanetal90,
author = {Hanowski, J. M. and Niemi, G. J. and Blake, J. G.},
title = {Statistical perspectives and experimental design when counting birds on line transects},
journal = {Condor},
year = {1990},
volume = {92},
pages = {326--335}
}
|
|||||
| Harden, R. H., M. R. J. & Milledge, D. R. | 1986 | An evaluation of the strip transect method for censusing bird communities in forests [BibTeX] |
Australian Wildlife Research 13:203--211 | ||
BibTeX:
@article{Haretal86,
author = {Harden, R. H., Muir, R. J. and Milledge, D. R.},
title = {An evaluation of the strip transect method for censusing bird communities in forests},
journal = {Australian Wildlife Research},
year = {1986},
volume = {13},
pages = {203--211}
}
|
|||||
| Hardy, P. & Morrison, M. | 2001 | Nest site selection by Elf Owls in the Sonoran Desert [BibTeX] |
Wilson Bulletin 113:23--32 | ||
BibTeX:
@article{Hardy2001,
author = {Hardy, P.C. and Morrison, M.L.},
title = {Nest site selection by Elf Owls in the Sonoran Desert},
journal = {Wilson Bulletin},
year = {2001},
volume = {113},
number = {1},
pages = {23--32}
}
|
|||||
| Harihar, A., Pandav, B. & Goyal, S. P. | 2009 | Responses of tiger (Panthera tigris) and their prey to removal of anthropogenic influences in Rajaji National Park, India [BibTeX] |
European Journal of Wildlife Research 55:97--105 | ||
BibTeX:
@article{Harihar2009,
author = {Abishek Harihar and Bivash Pandav and Surendra P. Goyal},
title = {Responses of tiger (\textit{Panthera tigris}) and their prey to removal of anthropogenic influences in {Rajaji National Park, India}},
journal = {European Journal of Wildlife Research},
year = {2009},
volume = {55},
pages = {97--105}
}
|
|||||
| Harmata, A. R., Podruzny, K. M., Zelenak, J. R. & Morrison, M. L. | 2000 | Passage rates and timing of bird migration in Montana [BibTeX] |
American Midland Naturalist 143:30--40 | ||
BibTeX:
@article{Haretal00,
author = {Harmata, A. R. and Podruzny, K. M. and Zelenak, J. R. and Morrison, M. L.},
title = {Passage rates and timing of bird migration in Montana},
journal = {American Midland Naturalist},
year = {2000},
volume = {143},
pages = {30--40}
}
|
|||||
| Harmata, A. R., Podruzny, K. M., Zelenak, J. R. & Morrison, M. L. | 1999 | Using marine surveillance radar to study bird movements and impact assessment [BibTeX] |
Wildlife Society Bulletin 27:44--52 | ||
BibTeX:
@article{HAR99,
author = {Harmata, A. R. and Podruzny, K. M. and Zelenak, J. R. and Morrison, M. L.},
title = {Using marine surveillance radar to study bird movements and impact assessment},
journal = {Wildlife Society Bulletin},
year = {1999},
volume = {27},
pages = {44--52}
}
|
|||||
| Harris, R. B. | 1986 | Reliability of trend lines obtained from variable counts [BibTeX] |
Journal of Wildlife Management 50:165--171 | ||
BibTeX:
@article{Har86,
author = {Harris, R. B.},
title = {Reliability of trend lines obtained from variable counts},
journal = {Journal of Wildlife Management},
year = {1986},
volume = {50},
pages = {165--171}
}
|
|||||
| Harris, R. B. & Burnham, K. P. | 2002 | On estimating wildlife densities from line transect data [BibTeX] |
Acta Zoological Sinica 48:812-818 | ||
BibTeX:
@article{Harris2002,
author = {Harris, R. B. and Burnham, K. P.},
title = {On estimating wildlife densities from line transect data},
journal = {Acta Zoological Sinica},
year = {2002},
volume = {48},
pages = {812-818},
note = {preprint}
}
|
|||||
| Hashimoto, C. | 1995 | Population census of the chimpanzees in the Kalinzu Forest, Uganda --- comparison between methods with nest counts [BibTeX] |
Primates 36:477--488 | ||
BibTeX:
@article{Has95,
author = {Hashimoto, C.},
title = {Population census of the chimpanzees in the {K}alinzu {F}orest, {U}ganda --- comparison between methods with nest counts},
journal = {Primates},
year = {1995},
volume = {36},
pages = {477--488}
}
|
|||||
| Hastie, G. D., Swift, R. J., Gordon, J. C., Slesser, G. & Turrell, W. R. | 2003 | Sperm whale distribution and seasonal density in the Faroe Shetland Channel | Journal of Cetacean Research and Management 5:247--252 | ||
| Abstract: Results from previous surveys suggest that an area of the northeast Atlantic, the Faroe Shetland Channel, is important for cetaceans. This study utilised passive acoustic survey techniques to evaluate the density of sperm whales in the Channel. Two-week surveys were carried out during oceanographic cruises in May and October 2001, and May 2002. A two hydrophone array was towed behind the vessel throughout the majority of the survey routes and was monitored by a two-person team and by software designed to automatically detect and measure bearings to whales. Distances of individual sperm whales from the trackline were determined using target motion analysis. Standard line transect techniques were applied to calculate the density of whales during surveys. The effects of sea conditions and survey vessel on the ability to detect whales were tested; the encounter rate and effective stripwidth (esw) were estimated independently for each sea state and for each of the vessels. A total of 79 individual whales were detected, and their distances from the trackline were calculated. As a probable result of insufficient sample size and a small effects size, neither the esw nor the encounter rates varied significantly with sea state or between the two survey vessels. The density of sperm whales during each of the surveys was estimated to be 2.05, 0.52 and 1.75 whales per 1,000km2 for the May 2001, October 2001 and May 2002 surveys respectively. Sperm whales were distributed across the majority of the Faroe Shetland Channel. This study has provided the basis for meaningful hypothesis generation in future studies and to gain a better understanding of the factors underlying the spatial and temporal distribution patterns of sperm whales in this area; data on oceanographic, biological and anthropogenic determinants should now be examined. | |||||
BibTeX:
@article{Hastie2003,
author = {Gordon D. Hastie and René J. Swift and Jonathan C.D. Gordon and George Slesser and William R. Turrell},
title = {Sperm whale distribution and seasonal density in the {Faroe Shetland Channel}},
journal = {Journal of Cetacean Research and Management},
year = {2003},
volume = {5},
pages = {247--252}
}
|
|||||
| Haukioja, E. | 1968 | Reliability of the line survey method in bird census with reference to reed bunting and sedge warbler [BibTeX] |
Ornis Fennica 45:105--113 | ||
BibTeX:
@article{Hau68,
author = {Haukioja, E.},
title = {Reliability of the line survey method in bird census with reference to reed bunting and sedge warbler},
journal = {Ornis Fennica},
year = {1968},
volume = {45},
pages = {105--113}
}
|
|||||
| Hayes, R. J. | 1977 | A critical review of line transect methods [BibTeX] |
: | ||
BibTeX:
@mastersthesis{Hay77,
author = {Hayes, R. J.},
title = {A critical review of line transect methods},
school = {University of Edinburgh},
year = {1977}
}
|
|||||
| Hayes, R. J. & Buckland, S. T. | 1983 | Radial-distance models for the line-transect method [BibTeX] |
Biometrics 39:29--42 | ||
BibTeX:
@article{HayBuc83,
author = {Hayes, R. J. and Buckland, S. T.},
title = {Radial-distance models for the line-transect method},
journal = {Biometrics},
year = {1983},
volume = {39},
pages = {29--42}
}
|
|||||
| Hayne, D. W. | 1949 | An examination of the strip census method for estimating animal populations [BibTeX] |
Journal of Wildlife Management 13:145--157 | ||
BibTeX:
@article{Hay49,
author = {Hayne, D. W.},
title = {An examination of the strip census method for estimating animal populations},
journal = {Journal of Wildlife Management},
year = {1949},
volume = {13},
pages = {145--157}
}
|
|||||
| Healy, W. M. & Welsh, C. J. E. | 1992 | Evaluating line transects to monitor gray squirrel populations [BibTeX] |
Wildlife Society Bulletin 20:83--90 | ||
BibTeX:
@article{HeaWel92,
author = {Healy, W. M. and Welsh, C. J. E.},
title = {Evaluating line transects to monitor gray squirrel populations},
journal = {Wildlife Society Bulletin},
year = {1992},
volume = {20},
pages = {83--90}
}
|
|||||
| Heckman, N. & Rice, J. | 1997 | Line transects of two-dimensional random fields: estimation and design [BibTeX] |
Canadian Journal of Statistics 25:481--501 | ||
BibTeX:
@article{HecRic97,
author = {Heckman, N. and Rice, J.},
title = {Line transects of two-dimensional random fields: estimation and design},
journal = {Canadian Journal of Statistics},
year = {1997},
volume = {25},
pages = {481--501}
}
|
|||||
| Hedges, S., Tyson, M., Sitompul, A., Kinnaird, M., Gunaryadi, D. & Aslan | 2005 | Distribution, status, and conservation needs of Asian elephants (Elephas maximus) in Lampung Province, Sumatra, Indonesia [BibTeX] |
Biological Conservation 124:35--48 | ||
BibTeX:
@article{Hedges2005,
author = {Hedges, S. and Tyson, M.J. and Sitompul, A.F. and Kinnaird, M.F. and Gunaryadi, D. and Aslan},
title = {Distribution, status, and conservation needs of Asian elephants (\textit{Elephas maximus}) in Lampung Province, Sumatra, Indonesia},
journal = {Biological Conservation},
year = {2005},
volume = {124},
number = {1},
pages = {35--48}
}
|
|||||
| Hedley, S., Reilly, S., Borberg, J., Holland, R., Hewitt, R., Watkins, J., Naganobu, M. & Sushin, V. | Modelling whale distribution: a preliminary analysis of data collected on the CCAMLR-IWC Krill Synoptic Survey, 2000 [BibTeX] |
: | |||
BibTeX:
@techreport{Hedley,
author = {S. Hedley and S. Reilly and J. Borberg and R. Holland and R. Hewitt and J. Watkins and M. Naganobu and V. Sushin},
title = {Modelling whale distribution: a preliminary analysis of data collected on the CCAMLR-IWC Krill Synoptic Survey, 2000},
number = {SC/53/E9}
}
|
|||||
| Hedley, S. L. | 2000 | Modelling heterogeneity in cetacean surveys [BibTeX] |
: | ||
BibTeX:
@phdthesis{HED00,
author = {Hedley,S. L.},
title = {Modelling heterogeneity in cetacean surveys},
school = {Univerity of St. Andrews},
year = {2000}
}
|
|||||
| Hedley, S. L. & Buckland, S. T. | 2004 | Spatial models for line transect sampling | Journal of Agricultural, Biological, and Environmental Statistics 9:181--199 | ||
| Abstract: This article develops methods for fitting spatial models to line transect data. These allow animal density to be related to topographical, environmental, habitat, and other spatial variables, helping wildlife managers to identify the factors that affect abundance. They also enable estimation of abundance for any subarea of interest within the surveyed region, and potentially yield estimates of abundance from sightings surveys for which the survey design could not be randomized, such as surveys conducted from platforms of opportunity. The methods are illustrated through analyses of data from a shipboard sightings survey of minke whales in the Antarctic. © 2004 American Statistical Association and the International Biometric Society. | |||||
BibTeX:
@article{Hedley2004,
author = {Hedley, S. L. and Buckland, S. T.},
title = {Spatial models for line transect sampling},
journal = {Journal of Agricultural, Biological, and Environmental Statistics},
year = {2004},
volume = {9},
number = {2},
pages = {181--199}
}
|
|||||
| Hedley, S. L., Buckland, S. T. & Borchers, D. L. | 1999 | Spatial modelling from line transect data [BibTeX] |
Journal of Cetacean Research and Management 1:255--264 | ||
BibTeX:
@article{HED99,
author = {Hedley,S. L. and Buckland, S. T. and Borchers, D. L.},
title = {Spatial modelling from line transect data},
journal = {Journal of Cetacean Research and Management},
year = {1999},
volume = {1},
pages = {255--264}
}
|
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| Heide-Jørgensen, M. & Reeves, R. | 1996 | Evidence of a decline in beluga, Delphinapterus leucas , abundance off West Greenland | ICES Journal of Marine Science 53:61-72(20) | URL PDF | |
| Abstract: Aerial surveys of belugas, or white whales, Delphinapterus leucas , were conducted off West Greenland in March 1993 and 1994. These surveys were designed to permit comparisons with similar surveys in 1981, 1982, and 1991. Differences in methods between the surveys in the early 1980s and those in the 1990s should mean that the 1990s surveys were, if anything, more efficient than the 1980s surveys. Weighted linear regressions of strip-census estimates of the relative abundance of belugas showed a significant decline from 1981 to 1994. While annual variability in ice conditions and other unknown factors may have had some local or small-scale effects on the movements and distribution of belugas off West Greenland, it is unlikely that these effects would account for the apparent decline in relative abundance. The most reasonable conclusion is that the stock size has declined considerably during the past 13 years, perhaps by as much as 62%. |
|||||
BibTeX:
@article{Heide-Jorgensen:1996:1054-3139:61,
author = {Heide-J{\o}rgensen, M.P. and Reeves, R.R.},
title = {Evidence of a decline in beluga, Delphinapterus leucas , abundance off West Greenland},
journal = {ICES Journal of Marine Science},
year = {1996},
volume = {53},
pages = {61-72(20)},
url = {http://www.ingentaconnect.com/content/ap/jm/1996/00000053/00000001/art00006}
}
|
|||||
| Heide-Jørgensen, M. P. & Acquarone, M. | 2002 | Size and trends of the bowhead whale, beluga and narwhal stocks wintering off West Greenland [BibTeX] |
NAMMCO Sci. Publ. 4:191--210 | ||
BibTeX:
@article{HeiAcq02,
author = {Heide-J{\o}rgensen, M. P and Acquarone, M.},
title = {Size and trends of the bowhead whale, beluga and narwhal stocks wintering off {W}est {G}reenland},
journal = {NAMMCO Sci. Publ.},
year = {2002},
volume = {4},
pages = {191--210}
}
|
|||||
| Heide-Jørgensen, M. P., Laidre, K., Borchers, D., Samarra, F. & Stern, H. | 2007 | Increasing abundance of bowhead whales in West Greenland [BibTeX] |
Biology Letters 3:277--280 | ||
BibTeX:
@article{Heide-Joergensen2007,
author = {Mads Peter Heide-J{\o}rgensen and Kristin Laidre and David Borchers and Filipa Samarra and Harry Stern},
title = {Increasing abundance of bowhead whales in West Greenland},
journal = {Biology Letters},
year = {2007},
volume = {3},
pages = {277--280}
}
|
|||||
| Heide-Jørgensen, M. P., Lassen, H., Teilmann, J. & Davis, R. A. | 1993 | An index of the relative abundance of wintering belugas, Delphinapterus leucas, and narwhals, Monodon monoceros, off West Greenland [BibTeX] |
Canadian Journal of Fisheries and Aquatic Sciences 50:2323--2335 | ||
BibTeX:
@article{Heide-Joergensen1993,
author = {Heide-J{\o}rgensen, M. P. and Lassen, H. and Teilmann, J. and Davis, R. A.},
title = {An index of the relative abundance of wintering belugas,{ \textit{Delphinapterus leucas}, and narwhals, \textit{Monodon monoceros}, off West Greenland}},
journal = {Canadian Journal of Fisheries and Aquatic Sciences},
year = {1993},
volume = {50},
pages = {2323--2335}
}
|
|||||
| Heide-Jørgensen, M. P., Mosbech, A., Teilmann, J., Benke, H. & Schultz, W. | 1992 | Harbor porpoise (Phocoena phocoena) densities obtained from aerial surveys north of Fyn and in the Bay of Kiel [BibTeX] |
Ophelia 35:133--146 | ||
BibTeX:
@article{Heietal92,
author = {Heide-J{\o}rgensen, M. P. and Mosbech, A. and Teilmann, J. and Benke, H. and Schultz, W.},
title = {Harbor porpoise (\emph{{P}hocoena phocoena}) densities obtained from aerial surveys north of {F}yn and in the {B}ay of {K}iel},
journal = {Ophelia},
year = {1992},
volume = {35},
pages = {133--146}
}
|
|||||
| Heide-Jørgensen, M. P., Borchers, D. L., Witting, L., Simon, M. J., Laidre, K. L., Rosing-Asvid, A. & Pike, D. | 2008 | Estimates of large whale abundance in West Greenland waters from an aerial survey in 2005 [BibTeX] |
Journal of Cetacean Research and Management 10:119--129 | ||
BibTeX:
@article{Heide-Joergensen2008a,
author = {Heide-Jørgensen, M. P. and D. L. Borchers and L. Witting and M. J. Simon and K. L. Laidre and A. Rosing-Asvid and D. Pike},
title = {Estimates of large whale abundance in West Greenland waters from an aerial survey in 2005},
journal = {Journal of Cetacean Research and Management},
year = {2008},
volume = {10},
pages = {119--129}
}
|
|||||
| Heide-Jørgensen, M. P., Laidre, K. L., Borchers, D., Marques, T. A., Stern, H. & Simon, M. | 2010 | The effect of sea-ice loss on beluga whales (Delphinapterus leucas) in West Greenland [BibTeX] |
Polar Research 29:198--208 | DOI PDF | |
BibTeX:
@article{Heide-Joergensen2010,
author = {M. P. Heide-Jørgensen and K. L. Laidre and D. Borchers and T. A. Marques and H. Stern and M. Simon},
title = {The effect of sea-ice loss on beluga whales (\textit{Delphinapterus leucas}) in {West Greenland}},
journal = {Polar Research},
year = {2010},
volume = {29},
pages = {198--208},
doi = {10.1111/j.1751-8369.2009.00142.x}
}
|
|||||
| Heide-Jørgensen, M. P., Laidre, K. L., Burt, M. L., Borchers, D. L., Marques, T. A., Hansen, R. G., Rasmussen, M. & Fossette, S. | 2010 | Abundance Of Narwhals (Monodon Monoceros) On The Hunting Grounds In Greenland [BibTeX] |
Journal of Mammalogy 91:1135--1151 | DOI | |
BibTeX:
@article{Heide-Joergensena,
author = {M. P. Heide-Jørgensen and K. L. Laidre and M. L. Burt and D. L. Borchers and T. A. Marques and R. G. Hansen and M. Rasmussen and S. Fossette},
title = {Abundance Of Narwhals (\textit{Monodon Monoceros}) On The Hunting Grounds In Greenland},
journal = {Journal of Mammalogy},
year = {2010},
volume = {91},
pages = {1135--1151},
doi = {10.1644/09-MAMM-A-198.1}
}
|
|||||
| Heide-Jørgensen, M. P., Simon, M. J. & Laidre, K. L. | 2007 | Estimates of large whale abundance in Greenland in September 2005 [BibTeX] |
Journal of Cetacean Research and Management 9:95--104 | ||
BibTeX:
@article{Heide-Joergensen,
author = {M. P. Heide-Jørgensen and M. J. Simon and K. L. Laidre},
title = {Estimates of large whale abundance in Greenland in September 2005},
journal = {Journal of Cetacean Research and Management},
year = {2007},
volume = {9},
pages = {95--104}
}
|
|||||
| Hein, E. W. | 1997 | Demonstration of line transect methodologies to estimate urban gray squirrel density | Environmental Management 21:943--947 | ||
| Abstract: Because studies estimating density of gray squirrels (Sciurus carolinensis) have been labor intensive and costly, I demonstrate the use of line transect surveys to estimate gray squirrel density and determine the costs of conducting surveys to achieve precise estimates. Density estimates are based on four transects that were surveyed five times from 30 June to 9 July 1994. Using the program DISTANCE, I estimated there were 4.7 (95% Cl = 1.86-11.92) gray squirrels/ha on the Clemson University campus. Eleven additional surveys would have decreased the percent coefficient of variation from 30% to 20% and would have cost approximately $114. Estimating urban gray squirrel density using line transect surveys is cost effective and can provide unbiased estimates of density, provided that none of the assumptions of distance sampling theory are violated. | |||||
BibTeX:
@article{Hein1997,
author = {Hein, E. W.},
title = {Demonstration of line transect methodologies to estimate urban gray squirrel density},
journal = {Environmental Management},
year = {1997},
volume = {21},
number = {6},
pages = {943--947}
}
|
|||||
| Hemingway, P. | 1971 | Field trials of the line transect method of sampling large populations of herbivores [BibTeX] |
The Scientific Management of Animal and Plant Communities for Conservation :405--411 | ||
BibTeX:
@incollection{Hem71,
author = {Hemingway, P.},
title = {Field trials of the line transect method of sampling large populations of herbivores},
booktitle = {The Scientific Management of Animal and Plant Communities for Conservation},
publisher = {Blackwell Scientific Publications},
year = {1971},
pages = {405--411}
}
|
|||||
| Henrys, P. | 2005 | Spatial Distance Sampling Modeling of Cetaceans Observed from Platforms of Opportunity [BibTeX] |
: | ||
BibTeX:
@mastersthesis{Henrys2005,
author = {Henrys, P.},
title = {Spatial Distance Sampling Modeling of Cetaceans Observed from Platforms of Opportunity},
school = {St Andrews University},
year = {2005}
}
|
|||||
| van Hensbergen, H. J., Berry, M. P. S. & Juritz, J. | 1996 | Helicopter-based line transect estimates of some Southern African game populations [BibTeX] |
South African Journal of Wildlife Research 26:81--87 | ||
BibTeX:
@article{vanetal96,
author = {van Hensbergen, H. J. and Berry, M. P. S. and Juritz, J.},
title = {Helicopter-based line transect estimates of some {S}outhern {A}frican game populations},
journal = {South African Journal of Wildlife Research},
year = {1996},
volume = {26},
pages = {81--87}
}
|
|||||
| Herr, H., Scheidat, M., Lehnert, K. & Siebert, U. | 2009 | Seals at sea: modelling seal distribution in the German bight based on aerial survey data [BibTeX] |
Marine Biology 156:811--820 | ||
BibTeX:
@article{Herr2009,
author = {Helena Herr and M. Scheidat and K. Lehnert and U. Siebert},
title = {Seals at sea: modelling seal distribution in the German bight based on aerial survey data},
journal = {Marine Biology},
year = {2009},
volume = {156},
pages = {811--820}
}
|
|||||
| Heydon, M. J. & Bulloh, P. | 1997 | Mousedeer densities in a tropical rainforest: the impact of selective logging [BibTeX] |
Journal of Applied Ecology 34:484--496 | ||
BibTeX:
@article{HeyBul97,
author = {Heydon, M. J. and Bulloh, P.},
title = {Mousedeer densities in a tropical rainforest: the impact of selective logging},
journal = {Journal of Applied Ecology},
year = {1997},
volume = {34},
pages = {484--496}
}
|
|||||
| Heydon, M. J., Reynolds, J. C. & Short, M. J. | 2000 | Variation in abundance of foxes (Vulpes vulpes) between three regions of rural Britain, in relation to landscape and other variables | Journal of Zoology 251:253--264 | ||
| Abstract: Spotlight transect surveys with distance sampling were used to estimate spring (pre-breeding) and autumn (post-production) fox Vulpes vulpes densities in three contrasting rural areas of Britain during 1995-97. This was the first attempt in Britain to measure and compare fox densities over large geographical areas (630-1460 km2). Mean post-production fox abundance was estimated to be 0.90/km2, 2.62/km2, and 0.59/km2 in mid-Wales, the east Midlands and East Anglia, falling to pre-breeding levels of 0.41/km2, 1.17/km2, and 0.16/km2 in spring. As relative measures of regional density, these estimates are strongly supported by independent indices of fox abundance, and by the simultaneous survey of two sympatric species, the badger Meles meles and brown hare Lepus europaeus, which demonstrate the absence of any terrain-related bias. Absolute abundance is less easy to verify, but estimates of spring density based on breeding earth censuses support the transect surveys. For two of the three regions, fox density was close to levels predicted by extrapolation on the basis of landscape, but in the third region (East Anglia), fox density was substantially below prediction. Thus, results failed to support a hypothesis that fox abundance can be predicted solely on the basis of landscape and its close correlates. Rather, they favoured a competing hypothesis that an independent factor determines fox abundance in some regions. A likely factor is culling by man. | |||||
BibTeX:
@article{Heydon2000,
author = {Heydon, M. J. and Reynolds, J. C. and Short, M. J.},
title = {Variation in abundance of foxes \textit{(Vulpes vulpes)} between three regions of rural {B}ritain, in relation to landscape and other variables},
journal = {Journal of Zoology},
year = {2000},
volume = {251},
number = {2},
pages = {253--264}
}
|
|||||
| Hiby, A. R. | 1986 | Results of a hazard rate model relevant to experiments on the 1984/85 IDCR minke whale assessment cruise [BibTeX] |
Report of the International Whaling Commission 36:497--498 | ||
BibTeX:
@article{Hib86,
author = {Hiby, A. R.},
title = {Results of a hazard rate model relevant to experiments on the 1984/85 {IDCR} minke whale assessment cruise},
journal = {Report of the International Whaling Commission},
year = {1986},
volume = {36},
pages = {497--498}
}
|
|||||
| Hiby, A. R. | 1985 | An approach to estimating population densities of great whales from sighting surveys [BibTeX] |
IMA Journal of Mathematics Applied in Medicine and Biology 2:201--220 | ||
BibTeX:
@article{Hib85,
author = {Hiby, A. R.},
title = {An approach to estimating population densities of great whales from sighting surveys},
journal = {IMA Journal of Mathematics Applied in Medicine and Biology},
year = {1985},
volume = {2},
pages = {201--220}
}
|
|||||
| Hiby, A. R. | 1982 | Using average number of whales in view to estimate population density [BibTeX] |
Report of the International Whaling Commission 32:562--565 | ||
BibTeX:
@article{Hib82,
author = {Hiby, A. R.},
title = {Using average number of whales in view to estimate population density},
journal = {Report of the International Whaling Commission},
year = {1982},
volume = {32},
pages = {562--565}
}
|
|||||
| Hiby, A. R. & Hammond, P. S. | 1989 | Survey techniques for estimating abundance of cetaceans [BibTeX] |
The Comprehensive Assessment of Whale Stocks: the Early Years :47--80 | ||
BibTeX:
@incollection{HibHam89,
author = {Hiby, A. R. and Hammond, P. S.},
title = {Survey techniques for estimating abundance of cetaceans},
booktitle = {The Comprehensive Assessment of Whale Stocks: the Early Years},
publisher = {International Whaling Commission},
year = {1989},
pages = {47--80}
}
|
|||||
| Hiby, A. R., Martin, A. R. & Fairfield, F. | 1984 | IDCR cruise/aerial survey in the north Atlantic 1982: aerial survey [BibTeX] |
Report of the International Whaling Commission 34:633--644 | ||
BibTeX:
@article{Hibetal84,
author = {Hiby, A. R. and Martin, A. R. and Fairfield, F.},
title = {{IDCR} cruise/aerial survey in the north {A}tlantic 1982: aerial survey},
journal = {Report of the International Whaling Commission},
year = {1984},
volume = {34},
pages = {633--644}
}
|
|||||
| Hiby, A. R. & Ward, A. J. | 1986 | Simulation trials of a cue-counting technique for censusing whale populations [BibTeX] |
Report of the International Whaling Commission 36:471--472 | ||
BibTeX:
@article{HibWar86,
author = {Hiby, A. R. and Ward, A. J.},
title = {Simulation trials of a cue-counting technique for censusing whale populations},
journal = {Report of the International Whaling Commission},
year = {1986},
volume = {36},
pages = {471--472}
}
|
|||||
| Hiby, A. R. & Ward, A. J. | 1986 | Analysis of cue-counting and blow rate estimation experiments carried out during the 1984/85 IDCR minke whale assessment cruise [BibTeX] |
Report of the International Whaling Commission 36:473--476 | ||
BibTeX:
@article{HiWar86b,
author = {Hiby, A. R. and Ward, A. J.},
title = {Analysis of cue-counting and blow rate estimation experiments carried out during the 1984/85 {IDCR} minke whale assessment cruise},
journal = {Report of the International Whaling Commission},
year = {1986},
volume = {36},
pages = {473--476}
}
|
|||||
| Hiby, L. | 1999 | The objective identification of duplicate sightings in aerial survey for porpoise [BibTeX] |
Marine Mammal Survey and Assessment Methods :179--189 | ||
BibTeX:
@incollection{Hib99,
author = {Hiby, L.},
title = {The objective identification of duplicate sightings in aerial survey for porpoise},
booktitle = {Marine Mammal Survey and Assessment Methods},
publisher = {Balkema},
year = {1999},
pages = {179--189}
}
|
|||||
| Hiby, L. & Krishna, M. | 2001 | Line transect sampling from a curving path | Biometrics 57:727--731 | ||
| Abstract: Cutting straight line transects through dense forest is time consuming and expensive when large areas need to be surveyed for rare or highly clustered species. We argue that existing paths or game trails may be suitable as transects for line transect sampling even though they will not, in general, run straight. Formulas and software currently used to estimate local density using perpendicular distance data can be used with closest approach distances measured from curving transects. Suitable paths or trails are those for which the minimum radius of curvature is rarely less than the width of the shoulder in the detection probability function. The use of existing paths carries the risk of bias resulting from unrepresentative sampling of available habitats, and this must be weighed against the increase in coverage available. | |||||
BibTeX:
@article{Hiby2001,
author = {Hiby, L. and Krishna, M.B.},
title = {Line transect sampling from a curving path},
journal = {Biometrics},
year = {2001},
volume = {57},
number = {3},
pages = {727--731}
}
|
|||||
| Hiby, L. & Lovell, P. | 1998 | Using aircraft in tandem formation to estimate abundance of harbour porpoise [BibTeX] |
Biometrics 54:1280--1289 | ||
BibTeX:
@article{HibLov98,
author = {Hiby, L. and Lovell, P.},
title = {Using aircraft in tandem formation to estimate abundance of harbour porpoise},
journal = {Biometrics},
year = {1998},
volume = {54},
pages = {1280--1289}
}
|
|||||
| Hiby, L., Ward, A. & Lovell, P. | 1989 | Analysis of the North Atlantic sightings survey 1987: Aerial survey results [BibTeX] |
Report of the International Whaling Commission 39:447--455 | ||
BibTeX:
@article{HIB89,
author = {Hiby, L. and Ward, A. and Lovell, P.},
title = {Analysis of the {N}orth {A}tlantic sightings survey 1987: Aerial survey results},
journal = {Report of the International Whaling Commission},
year = {1989},
volume = {39},
pages = {447--455}
}
|
|||||
| Hidinger, L. A. | 1996 | Measuring the impacts of ecotourism on animal populations: a case study of Tikal National Park, Guatemala [BibTeX] |
Yale F&ES Bulletin 99:49-59 | ||
BibTeX:
@article{Hidinger1996,
author = {Hidinger, L. A.},
title = {Measuring the impacts of ecotourism on animal populations: a case study of Tikal National Park, Guatemala},
journal = {Yale F\&ES Bulletin},
year = {1996},
volume = {99},
pages = {49-59}
}
|
|||||
| Hilden, O. & Järvinen, A. | 1989 | Efficiency of the line-transect method in mountain birch forest [BibTeX] |
Annales Zoologici Fennici 26:185--190 | ||
BibTeX:
@article{HilJAr89,
author = {Hilden, O. and J\"arvinen, A.},
title = {Efficiency of the line-transect method in mountain birch forest},
journal = {Annales Zoologici Fennici},
year = {1989},
volume = {26},
pages = {185--190}
}
|
|||||
| Hill, K., Padwe, J., Bejyvagi, C., Bepurangi, A., Jakugi, F., Tykuarangi, R. & Tykuarangi, T. | 1997 | Impact of hunting on large vertebrates in the Mbaracayu reserve, Paraguay [BibTeX] |
Conservation Biology 11:1339--1353 | ||
BibTeX:
@article{Hiletal97,
author = {Hill, K. and Padwe, J. and Bejyvagi, C. and Bepurangi, A. and Jakugi, F. and Tykuarangi, R. and Tykuarangi, T.},
title = {Impact of hunting on large vertebrates in the {M}baracayu reserve, {P}araguay},
journal = {Conservation Biology},
year = {1997},
volume = {11},
pages = {1339--1353}
}
|
|||||
| Hines, E. M., Adulyanukosol, K. & Duffus, D. A. | 2005 | Dugong (Dugong dugon) abundance along the Andaman coast of Thailand [BibTeX] |
Marine Mammal Science 21:536-549 | ||
BibTeX:
@article{Hines2005,
author = {Ellen M. Hines and Kanjana Adulyanukosol and David A. Duffus},
title = {Dugong (\textit{Dugong dugon}) abundance along the Andaman coast of Thailand},
journal = {Marine Mammal Science},
year = {2005},
volume = {21},
pages = {536-549}
}
|
|||||
| Hobson, K. A., Rempel, R. S., Greenwood, H., Turnbull, B. & Van Wilgenburg, S. L. | 2002 | Acoustic surveys of birds using electronic recordings: new potential from an omnidirectional microphone system [BibTeX] |
Wildlife Bulletin 30:709--720 | ||
BibTeX:
@article{Hobetal02,
author = {Hobson, K. A and Rempel, R. S and Greenwood, H and Turnbull, B. and Van Wilgenburg, S. L.},
title = {Acoustic surveys of birds using electronic recordings: new potential from an omnidirectional microphone system},
journal = {Wildlife Bulletin},
year = {2002},
volume = {30},
pages = {709--720}
}
|
|||||
| Holmes, A. L. & Geupel, G. R. | 2005 | Effects of Trail Width on the Densities of Four Species of Breeding Birds in Chaparral [BibTeX] |
: | ||
BibTeX:
@techreport{Holmes2005,
author = {Aaron L. Holmes and Geoffrey R. Geupel},
title = {Effects of Trail Width on the Densities of Four Species of Breeding Birds in {C}haparral},
year = {2005},
number = {Gen. Tech. Rep. PSW-GTR-191}
}
|
|||||
| Holt, R. S. & Cologne, J. | 1987 | Factors affecting line transect estimates of dolphin school density [BibTeX] |
Journal of Wildlife Management 51:836--843 | ||
BibTeX:
@article{HolCol87,
author = {Holt, R. S. and Cologne, J.},
title = {Factors affecting line transect estimates of dolphin school density},
journal = {Journal of Wildlife Management},
year = {1987},
volume = {51},
pages = {836--843}
}
|
|||||
| Holt, R. S. & Powers, J. E. | 1982 | Abundance Estimation of Dolphin Stocks Involved in the Eastern Tropical Pacific Yellowfin Tuna Fishery Determined From Aerial and Ship Surveys to 1979 [BibTeX] |
: | ||
BibTeX:
@techreport{HolPow82,
author = {Holt, R. S. and Powers, J. E.},
title = {Abundance Estimation of Dolphin Stocks Involved in the Eastern Tropical Pacific Yellowfin Tuna Fishery Determined From Aerial and Ship Surveys to 1979},
year = {1982}
}
|
|||||
| Hone, J. | 1988 | A test of the accuracy of line and strip transect estimators in aerial survey [BibTeX] |
Australian Wildlife Research 15:493--497 | ||
BibTeX:
@article{Hon88,
author = {Hone, J.},
title = {A test of the accuracy of line and strip transect estimators in aerial survey},
journal = {Australian Wildlife Research},
year = {1988},
volume = {15},
pages = {493--497}
}
|
|||||
| Hone, J. | 1986 | Accuracy of the multiple regression method for estimating density in transect counts [BibTeX] |
Australian Wildlife Research 13:121--126 | ||
BibTeX:
@article{Hon86,
author = {Hone, J.},
title = {Accuracy of the multiple regression method for estimating density in transect counts},
journal = {Australian Wildlife Research},
year = {1986},
volume = {13},
pages = {121--126}
}
|
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| Hounsome, T. D., Young, R. P., Davison, J., Yarnell, R. W., Trewby, I. D., Garnett, B. T., Delahay, R. J. & Wilson, G. J. | 2005 | An evaluation of distance sampling to estimate badger (Meles meles) abundance | Journal of Zoology 266:81--87 | ||
| Abstract: Distance sampling is a common and increasingly used method of estimating animal abundance in conservation and management programmes. The precision of a distance sampling survey can be estimated from the field data, but accuracy can only be evaluated by comparison with the true population size. For wild mammal populations, such opportunities are rare. The high-density badger Meles meles population at Woodchester Park in Gloucestershire, U.K. has been routinely and intensively live-trapped for the past 30 years. The estimates of abundance based on mark-recapture analyses of the live-trapping data provided a reliable baseline against which to evaluate distance sampling for a badger population. A distance sampling survey was carried out in autumn 2002 by using spotlighting along line transects. Owing to the impractical nature of spotlighting in closed habitats, such as woodland, surveys were conducted in open habitat only. A radio-tracking study provided behavioural data that were used to estimate the proportion of the population available for sampling in open habitats. This was incorporated as a multiplier into the DISTANCE analysis. The estimate of abundance from distance sampling was 76 badgers (% CV = 42.2), using a multiplier based on radio-tracking data from autumn only. When the multiplier was derived from radio-tracking data from across the whole year, based on a larger sample of tracked badgers, the distance sampling abundance estimate was 77 badgers (% CV = 25.9). These compared favourably to the mark-recapture estimate of 68 badgers (% CV = 7.4). The lack of precision in the distance sampling density estimate was largely owing to the inclusion of the multiplier. Distance sampling combined with data on habitat use can produce reliable estimates of badger abundance in areas of medium to high density, particularly in landscapes of primarily open habitat. © 2005 The Zoological Society of London. | |||||
| Review: Simple work where the distance sampling estimate is compared with an independent capture-recapture estimate. The need to include a multiplier for uncovered areas was stressed, and the importance of having a multiplier with low variance is evident, as using only 3 badgers lead to a proportion of variance due to the multiplier being 73%. |
|||||
BibTeX:
@article{Hounsome2005,
author = {Hounsome, T. D. and Young, R. P. and Davison, J. and Yarnell, R. W. and Trewby, I. D. and Garnett, B. T. and Delahay, R. J. and Wilson, G. J.},
title = {An evaluation of distance sampling to estimate badger \textit{(Meles meles) } abundance},
journal = {Journal of Zoology},
year = {2005},
volume = {266},
number = {1},
pages = {81--87}
}
|
|||||
| Hutto, R. L., Pletschet, S. M. & Hendricks, P. | 1986 | A fixed radius point count method for nonbreeding and breeding season use [BibTeX] |
The Auk 103:593--602 | ||
BibTeX:
@article{Hutetal86,
author = {Hutto, R. L. and Pletschet, S. M. and Hendricks, P.},
title = {A fixed radius point count method for nonbreeding and breeding season use},
journal = {The Auk},
year = {1986},
volume = {103},
pages = {593--602}
}
|
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| Hutto, R. L. & Young, J. S. | 2003 | On the design of monitoring programs and the use of population indices: A reply to Ellingson and Lukacs [BibTeX] |
Wildlife Society Bulletin 31:903--910 | ||
BibTeX:
@article{Hutto2003,
author = {Hutto, R. L. and Young, J. S.},
title = {On the design of monitoring programs and the use of population indices: A reply to {Ellingson and Lukacs}},
journal = {Wildlife Society Bulletin},
year = {2003},
volume = {31},
pages = {903--910}
}
|
|||||
| Hutto, R. L. & Young, J. S. | 2002 | Regional landbird monitoring: perspectives from the Northern Rocky Mountains [BibTeX] |
Wildlife Society Bulletin 30:738--750 | ||
BibTeX:
@article{HutYou02,
author = {Hutto, R. L. and Young, J. S.},
title = {Regional landbird monitoring: perspectives from the {Northern Rocky Mountains}},
journal = {Wildlife Society Bulletin},
year = {2002},
volume = {30},
pages = {738--750}
}
|
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| Hyrenbach, K., Baduini, C. & Hunt Jr., G. | 2001 | Line transect estimates of Short-tailed Shearwater Puffinus tenuirostris mortality in the south-eastern Bering Sea, 1997-1999 | Marine Ornithology 29:11--18 | ||
| Abstract: During 1997, hundreds of thousands of Short-tailed Shearwaters Puffinus tenuirostris starved to death in the Bering Sea. We surveyed the distribution and abundance of floating carcasses during a cruise between 27 August-12 September, and estimated that over 95 000 carcasses were afloat within three survey grids covering approximately 52 400 km2. We repeatedly surveyed the same areas during two subsequent cruises in 1998 and 1999, and used standard population sampling techniques to evaluate the background levels of shearwater mortality during additional years when a die-off did not occur. The mortality event we observed in 1997 was unusual due to its extent and magnitude. During the die-off, dead shearwaters were sighted within all three survey grids. Conversely, we only encountered carcasses at one of these sites in 1998. Moreover, carcass densities in 1997 were at least one order of magnitude higher than those recorded during the following year. Surveys of seabird mortality at sea can account for floating carcasses before they are lost through advection and scavenging. Therefore, vessel-based surveys are likely to improve the accuracy of seabird mortality estimates based solely on counts of beach-cast carcasses. Here we describe the use of line transects to estimate seabird mortality at sea, and offer suggestions to standardize future surveys. Standardized surveys will improve our ability to compare the frequency, extent, and magnitude of seabird die-offs over time. | |||||
BibTeX:
@article{Hyrenbach2001,
author = {Hyrenbach, K.D. and Baduini, C.L. and Hunt Jr., G.L.},
title = {Line transect estimates of Short-tailed Shearwater \textit{Puffinus tenuirostris} mortality in the south-eastern Bering Sea, 1997-1999},
journal = {Marine Ornithology},
year = {2001},
volume = {29},
number = {1},
pages = {11--18}
}
|
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| Hyrenbach, K. D., Henry, M. F., Morgan, K. H., Welch, D. W. & Sydeman, W. J. | 2007 | Optimizing the width of strip transects for seabird surveys from vessels of opportunity [BibTeX] |
Marine Ornithology 35:29--37 | ||
BibTeX:
@article{Hyrenbach2007,
author = {K. David Hyrenbach and Mike F. Henry and Ken H. Morgan and David W. Welch and William J. Sydeman},
title = {Optimizing the width of strip transects for seabird surveys from vessels of opportunity},
journal = {Marine Ornithology},
year = {2007},
volume = {35},
pages = {29--37}
}
|
|||||
| Hüttmann, F. | 2002 | The first international DISTANCE sampling conference at the University of St. Andrews, Scotland, July 30 to August 3, 2001 [BibTeX] |
Zeitschrift fur JagdwissenschaftErste internationale DISTANCE sampling konferenz, gehalten an der University of St. Andrews, Schottland, 30. Juli bis 3. August 2001 48:66--67 | ||
BibTeX:
@article{Huttmann2002,
author = {H{\"u}ttmann, F.},
title = {The first international DISTANCE sampling conference at the University of St. Andrews, Scotland, July 30 to August 3, 2001},
booktitle = {Erste internationale DISTANCE sampling konferenz, gehalten an der University of St. Andrews, Schottland, 30. Juli bis 3. August 2001},
journal = {Zeitschrift fur Jagdwissenschaft},
year = {2002},
volume = {48},
number = {1},
pages = {66--67}
}
|
|||||
| Ickes, K. | 2001 | Hyper-Abundance of Native Wild Pigs (Sus scrofa) in a Lowland Dipterocarp Rain Forest of Peninsular Malaysia | Biotropica 33:682--690 | DOI | |
| Abstract: This study reports extraordinarily high density estimates for the wild pig (Sus scrofa) from an aseasonal tropical forest site within the species' native range. At Pasoh Forest Reserve, a 2500 ha area of lowland dipterocarp rain forest in Peninsular Malaysia, line transects were used to estimate pig density from May to October in 1996 and 1998. In 1996, 44 sightings of S. scrofa consisting of 166 individuals were recorded along 81 km of transects. In 1998, 39 sightings documented 129 individuals along 79.9 km of transects. Estimated population density was 47.0 pigs/kmtextasciicircum2 in 1996 and 27.0 pigs/kmtextasciicircum2 in 1998. Sus scrofa biomass in this forest was estimated at 1837 kg/kmtextasciicircum2 and 1346 kg/kmtextasciicircum2 in 1996 and 1998, respectively. Differences between years were attributed to changes in the density of young pigs, coincident with a mast-seeding year of dipterocarp trees in 1996. Pig densities at Pasoh Forest Reserve were much higher than at other forest locations within the species' native range in Europe and Asia. Because Pasoh Forest Reserve is a forest fragment, two factors likely account for the extremely high pig densities: (1) local extinction of natural predators (mainly tigers and leopards) and (2) an abundant year-round food supply of African oil palm fruits from extensive plantations bordering the reserve. | |||||
BibTeX:
@article{IckesBiotropica2001,
author = {Kalan Ickes},
title = {Hyper-Abundance of Native Wild Pigs \textit{(Sus scrofa)} in a Lowland Dipterocarp Rain Forest of Peninsular Malaysia},
journal = {Biotropica},
year = {2001},
volume = {33},
number = {4},
pages = {682--690},
note = {{ArticleType:} primary\_article / Full publication date: Dec., 2001 / Copyright © 2001 The Association for Tropical Biology and Conservation},
doi = {http://dx.doi.org/10.1646/0006-3606(2001)033[0682:HAONWP]2.0.CO;2}
}
|
|||||
| III, F. R. T. & Sorte, F. A. L. | 2008 | Comparison of Methods for Estimating Bird Abundance and Trends From Historical Count Data [BibTeX] |
Journal of Wildlife Management 72:1674--1682 | ||
BibTeX:
@article{III2008,
author = {Frank R. Thompson III and Frank A. La Sorte},
title = {Comparison of Methods for Estimating Bird Abundance and Trends From Historical Count Data},
journal = {Journal of Wildlife Management},
year = {2008},
volume = {72},
pages = {1674--1682}
}
|
|||||
| Ingberman, B., Fusco-Costa, R. & de Araujo Monteiro-Filho, E. | 2009 | Population Survey and Demographic Features of a Coastal Island Population of Alouatta clamitans in Atlantic Forest, Southeastern Brazil [BibTeX] |
International Journal of Primatology 30:1-14 | URL | |
BibTeX:
@article{springerlink:10.1007/s10764-008-9324-z,
author = {Ingberman, Bianca and Fusco-Costa, Roberto and de Araujo Monteiro-Filho, Emygdio},
title = {Population Survey and Demographic Features of a Coastal Island Population of \textit{Alouatta clamitans} in Atlantic Forest, Southeastern Brazil},
journal = {International Journal of Primatology},
publisher = {Springer Netherlands},
year = {2009},
volume = {30},
pages = {1-14},
note = {10.1007/s10764-008-9324-z},
url = {http://dx.doi.org/10.1007/s10764-008-9324-z}
}
|
|||||
| Inman, R. D., Nussear, K. E. & Tracy, C. R. | 2010 | Detecting trends in desert tortoise population growth: elusive behavior inflates variance in estimates of population density [BibTeX] |
Endangered Species Research 10:294--304 | DOI PDF | |
BibTeX:
@article{Inman2010,
author = {Richard D. Inman and Kenneth E. Nussear and C. Richard Tracy},
title = {Detecting trends in desert tortoise population growth: elusive behavior inflates variance in estimates of population density},
journal = {Endangered Species Research},
year = {2010},
volume = {10},
pages = {294--304},
doi = {10.3354/esr00214}
}
|
|||||
| Innes, S., Heide-Jørgensen, M. P., Laake, J. L., Laidre, K. L., Cleator, H. J., Richard, P. & Stewart, R. E. A. | 2002 | Surveys of belugas and narwhals in the Canadian High Arctic in 1996 [BibTeX] |
NAMMCO Sci. Publ. 4:169--190 | ||
BibTeX:
@article{Innetal02,
author = {Innes, S and Heide-J{\o}rgensen, M. P and Laake, J. L and Laidre, K. L and Cleator, H. J and Richard, P. and Stewart, R. E. A.},
title = {Surveys of belugas and narwhals in the {C}anadian {H}igh {A}rctic in 1996},
journal = {NAMMCO Sci. Publ.},
year = {2002},
volume = {4},
pages = {169--190}
}
|
|||||
| Isaac, N. J. B., Cruickshanks, K. L., Weddle, A. M., Marcus Rowcliffe, J., Brereton, T. M., Dennis, R. L. H., Shuker, D. M. & Thomas, C. D. | 2011 | Distance sampling and the challenge of monitoring butterfly populations [BibTeX] |
Methods in Ecology and Evolution : | DOI URL | |
BibTeX:
@article{MEE3:MEE3109,
author = {Isaac, Nick J. B. and Cruickshanks, Katie L. and Weddle, Ann M. and Marcus Rowcliffe, J. and Brereton, Tom M. and Dennis, Roger L. H. and Shuker, David M. and Thomas, Chris D.},
title = {Distance sampling and the challenge of monitoring butterfly populations},
journal = {Methods in Ecology and Evolution},
publisher = {Blackwell Publishing Ltd},
year = {2011},
url = {http://dx.doi.org/10.1111/j.2041-210X.2011.00109.x},
doi = {10.1111/j.2041-210X.2011.00109.x}
}
|
|||||
| Järvinen, O. | 1978 | Estimating relative densities of land birds by point counts [BibTeX] |
Annales Zoologici Fennici 15:290--293 | ||
BibTeX:
@article{Jar78,
author = {J\"arvinen, O.},
title = {Estimating relative densities of land birds by point counts},
journal = {Annales Zoologici Fennici},
year = {1978},
volume = {15},
pages = {290--293}
}
|
|||||
| Järvinen, O. | 1978 | Species-specific efficiency in line transects [BibTeX] |
Ornis Scandinavica 9:164--167 | ||
BibTeX:
@article{Jar78b,
author = {J\"arvinen, O.},
title = {Species-specific efficiency in line transects},
journal = {Ornis Scandinavica},
year = {1978},
volume = {9},
pages = {164--167}
}
|
|||||
| Järvinen, O. | 1976 | Estimating relative densities of breeding birds by the line transect method. II. Comparison between two methods [BibTeX] |
Ornis Scandinavica 7:43--48 | ||
BibTeX:
@article{Jar76,
author = {J\"arvinen, O.},
title = {Estimating relative densities of breeding birds by the line transect method. II. Comparison between two methods},
journal = {Ornis Scandinavica},
year = {1976},
volume = {7},
pages = {43--48}
}
|
|||||
| Järvinen, O. & Väisänen, R. A. | 1983 | Confidence limits for estimates of population density in line transects [BibTeX] |
Ornis Scandinavica 14:129--134 | ||
BibTeX:
@article{JarVai83a,
author = {J\"arvinen, O. and V\"ais\"anen, R. A.},
title = {Confidence limits for estimates of population density in line transects},
journal = {Ornis Scandinavica},
year = {1983},
volume = {14},
pages = {129--134}
}
|
|||||
| Järvinen, O. & Väisänen, R. A. | 1983 | Correction coefficients for line transect censuses of breeding birds [BibTeX] |
Ornis Fennica 60:97--104 | ||
BibTeX:
@article{JarVai83b,
author = {J\"arvinen, O. and V\"ais\"anen, R. A.},
title = {Correction coefficients for line transect censuses of breeding birds},
journal = {Ornis Fennica},
year = {1983},
volume = {60},
pages = {97--104}
}
|
|||||
| Järvinen, O. & Väisänen, R. A. | 1976 | Between-year component of diversity in communities of breeding land birds [BibTeX] |
Oikos 27:34--9 | ||
BibTeX:
@article{JarVai76,
author = {J\"arvinen, O. and V\"ais\"anen, R. A.},
title = {Between-year component of diversity in communities of breeding land birds},
journal = {Oikos},
year = {1976},
volume = {27},
pages = {34--9}
}
|
|||||
| Järvinen, O. & Väisänen, R. A. | 1976 | Estimating relative densities of breeding birds by the line transect method. IV. Geographical constancy of the proportion of main belt observations [BibTeX] |
Ornis Fennica 53:87--90 | ||
BibTeX:
@article{JarVai76b,
author = {J\"arvinen, O. and V\"ais\"anen, R. A.},
title = {Estimating relative densities of breeding birds by the line transect method. IV. Geographical constancy of the proportion of main belt observations},
journal = {Ornis Fennica},
year = {1976},
volume = {53},
pages = {87--90}
}
|
|||||
| Järvinen, O. & Väisänen, R. A. | 1976 | Finnish line transect censuses [BibTeX] |
Ornis Fennica 53:115--118 | ||
BibTeX:
@article{JarVai76c,
author = {J\"arvinen, O. and V\"ais\"anen, R. A.},
title = {Finnish line transect censuses},
journal = {Ornis Fennica},
year = {1976},
volume = {53},
pages = {115--118}
}
|
|||||
| Järvinen, O. & Väisänen, R. A. | 1975 | Estimating relative densities of breeding birds by the line transect method [BibTeX] |
Oikos 26:316--322 | ||
BibTeX:
@article{JarVai75,
author = {J\"arvinen, O. and V\"ais\"anen, R. A.},
title = {Estimating relative densities of breeding birds by the line transect method},
journal = {Oikos},
year = {1975},
volume = {26},
pages = {316--322}
}
|
|||||
| Järvinen, O., Väisänen, R. A. & Haila, Y. | 1976 | Estimating relative densities of breeding birds by the line transect method. III. Temporal constancy of the proportion of main belt observations [BibTeX] |
Ornis Fennica 53:40--45 | ||
BibTeX:
@article{Jaretal76,
author = {J\"arvinen, O. and V\"ais\"anen, R. A. and Haila, Y.},
title = {Estimating relative densities of breeding birds by the line transect method. III. Temporal constancy of the proportion of main belt observations},
journal = {Ornis Fennica},
year = {1976},
volume = {53},
pages = {40--45}
}
|
|||||
| Jachmann, H. | 2002 | Comparison of Aerial Counts with Ground Counts for Large African Herbivores | Journal of Applied Ecology 39:841--852 | ||
| Abstract: 1. Over the past 50 years, aerial counts have been widely used in African wildlife management; however, the accuracy of the resulting estimates has rarely been questioned. The reliability of aerial counts of large African herbivores was examined by comparing the results of a series of systematic aerial sample counts with those from a series of line transect foot counts conducted in the Lupande Game Management Area in Zambia. 2. For most large herbivore species, the estimates from the aerial counts were considerably lower than those from the ground counts. The data pointed to undercounting as a major problem of aerial surveys. During the aerial counts, significant numbers of animals were missed on the transects, first due to the low probability of spotting single animals, small groups of animals and less conspicuous ones (sighting probability bias), and secondly because part of the population was concealed by obstructions and therefore not visible to the observers (visibility bias). 3. The main factors that influence visibility of large herbivores from the air are the animals' reactions to an over-flying aircraft, dispersion, body size and colour. Animals that move in response to an aircraft are more likely to be seen than static ones; dark-coloured animals are easier to spot than light-coloured ones against a light background; large herds are easier to detect than small ones; and large animals are more easily seen than small ones. Body size is important while trying to spot grazers and mixed feeders from the air, while colour is important for spotting browsers. This is mainly due to the differences in habitat use, with browsers being confined to the thicker habitat. 4. To minimize undercounting bias, both conventional aerial counts and aerial line transect counts should be restricted to large conspicuous grazers and mixed feeders in medium to large group sizes, such as elephant Loxodonta africana africana, buffalo Sincerus caffer, zebra Equus burchell, wildebeest Connochaetes and lechwe Kobus leche. Operational factors, such as height, speed and strip width, should be kept within reasonable limits for conventional aerial counts. Only one species should be counted at a time, always applying the double-count technique. For aerial line transect counts, the use of a helicopter is a prerequisite to obtaining accurate estimates. Other important considerations are observer experience and flight duration. | |||||
BibTeX:
@article{JachmannJAE2002,
author = {H. Jachmann},
title = {Comparison of Aerial Counts with Ground Counts for Large African Herbivores},
journal = {Journal of Applied Ecology},
year = {2002},
volume = {39},
number = {5},
pages = {841--852}
}
|
|||||
| Jaramillo-Legorreta, A. M., Rojas-Bracho, L. & Gerrodette, T. | 1999 | A new abundance estimate for vaquitas: first step for recovery [BibTeX] |
Marine Mammal Science 15:957--973 | ||
BibTeX:
@article{Jaretal99,
author = {Jaramillo-Legorreta, A. M. and Rojas-Bracho, L. and Gerrodette, T.},
title = {A new abundance estimate for vaquitas: first step for recovery},
journal = {Marine Mammal Science},
year = {1999},
volume = {15},
pages = {957--973}
}
|
|||||
| Jarvis, A. M. & Robertson, A. | 1999 | Predicting population sizes and priority conservation areas for 10 endemic Namibian bird species [BibTeX] |
Biological Conservation 88:121--131 | ||
BibTeX:
@article{JarRob99,
author = {Jarvis, A. M. and Robertson, A.},
title = {Predicting population sizes and priority conservation areas for 10 endemic {N}amibian bird species},
journal = {Biological Conservation},
year = {1999},
volume = {88},
pages = {121--131}
}
|
|||||
| Jathanna, D., Karanth, K. & Johnsingh, A. | 2003 | Estimation of large herbivore densities in the tropical forests of southern India using distance sampling | Journal of Zoology 261:285--290 | ||
| Abstract: Ecological densities of large herbivores were estimated using the line transect method in the tropical moist forests of Bhadra Tiger Reserve, southern India, during November 2000. The species of interest were chital Axis axis, sambar Cervus unicolor, muntjac Muntiacus muntjak, gaur Bos gaurus and Hanuman langur Presbytes entellus. Six permanent transects, ranging from 2.6 to 3.6 km (totalling 18.2 km) were each walked 26 times. A total of 473 km was walked during the surveys. Numbers of detections were generally low (51, 25, 68, 17 and 302 for chital, sambar, muntjac, gaur and langur, respectively). Mean estimated densities of different species were [hat D (± SE)]: 4.51 (± 1.05) chital km-2, 0.89 (± 0.23) sambar km -2, 3.64 (± 0.63) muntjac km-2, 1.48 (± 0.63) gaur km-2 and 22.62 (± 2.64) langur km-2. Possible shortcomings of our estimates are considered and suggestions made for improving future surveys. A comparison with densities estimated for these species in other well-protected parks showed that the chital, gaur and sambar densities in Bhadra were extremely low. The main causal factors for these low densities seem to be poaching and livestock grazing. | |||||
BibTeX:
@article{Jathanna2003,
author = {Jathanna, D. and Karanth, K.U. and Johnsingh, A.J.T.},
title = {Estimation of large herbivore densities in the tropical forests of southern India using distance sampling},
journal = {Journal of Zoology},
year = {2003},
volume = {261},
number = {3},
pages = {285--290}
}
|
|||||
| Jathanna, D., Kumar, N. S. & Karanth, K. U. | 2008 | Measuring Indian giant squirrel (Ratufa indica) abundance in southern India using distance sampling [BibTeX] |
Current Science 95:885-888 | ||
BibTeX:
@article{Jathanna2008,
author = {Devcharan Jathanna and N. Samba Kumar and K. Ullas Karanth},
title = {Measuring {Indian giant squirrel (\textit{Ratufa indica}) abundance in southern India} using distance sampling},
journal = {Current Science},
year = {2008},
volume = {95},
pages = {885-888}
}
|
|||||
| Jefferson, T. A. | 2000 | Population Biology of the Indo-Pacific Hump-Backed Dolphin in Hong Kong Waters | Wildlife Monographs :1--65 | URL | |
| Abstract: The Indo-Pacific hump-backed dolphin (Sousa chinensis Osbeck, 1765) is found throughout the western Pacific and Indian oceans, from southern China and northern Australia in the east to South Africa in the west. Throughout most of its range it has not been well studied, and in southern China very little is known of its biology. The goal of the present study was to provide scientific information needed for the longterm conservation and management of the population that occurs in Hong Kong waters. From September 1995 to November 1998, 38,105 km of systematic line transect surveys were conducted throughout marine waters of the Hong Kong Special Administrative Region (SAR) of the People's Republic of China (PRC) and adjacent waters to provide data on distribution and abundance. Photo-identification of individual dolphins allowed for examination of movement patterns, home ranges, and social organization. Collection of stranded dolphin carcasses and detailed necropsies provided information on causes of death as well as samples for life history studies, such as feeding habits, growth and reproduction, ecotoxicology, and stock structure. The dolphin population appears to be centered around the Pearl River Estuary, and Hong Kong waters represent the eastern portion of the range, which extends far into mainland Chinese waters (Lingding Bay) and covers at least $1,800 rm km^2$. Within Hong Kong, dolphins only occur in western waters around Lantau Island. The area north of Lantau Island is heavily used throughout the year and represents by far the most important habitat in Hong Kong. Line transect analyses indicate that between 88 (spring) and 145 (summer) dolphins occur in Hong Kong. Based on 27,600 photographs taken, 213 individual dolphins were identified. The total size of the Pearl River breeding population is unknown, but is estimated to consist of at least 1,028 dolphins, based on line transect analysis. An apparent decline in the number of dolphins in the North Lantau area over the period from 1996-1998 was not statistically significant. Individual dolphins have overlapping home ranges of about $30-400 rm km^2$ in different sections of the population's overall range. Groups of dolphins in Hong Kong number up to 23 animals, with an average group size of 3.8 +- s.d. 3.63 animals. There is no significant seasonal variation in group size, but groups feeding behind pair trawl fishing vessels (mean = 9.6 +- s.d. 5.37) are significantly larger than other groups, and groups in Lingding Bay, in Chinese waters west of Hong Kong (mean = 8.3 +- s.d. 7.84) are significantly larger than those in Hong Kong. Groups are very fluid and change composition frequently, with association indices ranging from 0-0.333. Behavioral patterns are similar to those of other coastal dolphins, but Hong Kong hump-backed dolphins only rarely ride bow waves. Following pair trawlers represents an important feeding strategy for some individuals. Construction work on an airport fuel facility in the dolphins' main habitat appears to have caused some disturbance (indicated by increased swimming speeds) and possibly temporary evacuation of the surrounding area. There is a great deal of developmental variation in the color pattern of southern Chinese hump-backed dolphins, with a general lightening from newborn to adult stages. Males appear to retain more spots in adulthood than females. Length at birth appears to be about 100 cm, and postnatal development is characterized by rapid growth in the first year and a levelling-off of the growth curve after reaching adulthood. Asymptotic length is reached at around 243 cm. Length and weight are related exponentially, with the maximum weight about 250 kg. Calving occurs throughout the year, but most young are born from January through August, with a peak in spring/summer. Scant evidence suggests that sexual maturity in females is reached at about 9-10 years of age. Dolphins feed mainly on several demersal and pelagic fish species that are often associated with estuaries. There is a lack of evidence for long-distance movements (on the order of hundreds of linear kilometers), and this presumably results in isolation of groups around major Chinese river mouths. Thus it appears that there may be at least 8 separate populations of hump-backed dolphins along the coast of southern China. The Pearl River Estuary, including Hong Kong, is apparently inhabited by one of these populations, although preliminary genetic work has shown only equivocal evidence of population separation from dolphins in the Xiamen area. Human-related causes of mortality include entanglement in fishing nets and vessel collisions. Some environmental contaminants (especially the heavy metal mercury and the pesticide DDT) were found in high levels in some dolphins, and preliminary evidence suggests that these may be affecting the health of the animals. A series of recommendations for management and for further research have been made to aid in the conservation of these animals. Principles for the conservation of wild living resources should be followed, and information from both the natural and social sciences are needed for proper management. Research and longterm monitoring of the population must continue for management strategies to be evaluated and refined. Overall, the population of hump-backed dolphins that occurs in Hong Kong waters appears to be viable and should be able to survive with appropriate conservation efforts. | |||||
BibTeX:
@article{Jefferson2000,
author = {Jefferson, Thomas A.},
title = {Population Biology of the Indo-Pacific Hump-Backed Dolphin in Hong Kong Waters},
journal = {Wildlife Monographs},
year = {2000},
number = {144},
pages = {1--65},
url = {http://links.jstor.org/sici?sici=0084-0173%28200010%290%3A144%3C1%3APBOTIH%3E2.0.CO%3B2-F}
}
|
|||||
| Jefferson, T. A. | 1996 | Estimates of abundance of cetaceans in offshore waters of the northwestern Gulf of Mexico, 1992--1993 [BibTeX] |
Southwest Naturalist 41:279--287 | ||
BibTeX:
@article{Jef96,
author = {Jefferson, T. A.},
title = {Estimates of abundance of cetaceans in offshore waters of the northwestern {G}ulf of {M}exico, 1992--1993},
journal = {Southwest Naturalist},
year = {1996},
volume = {41},
pages = {279--287}
}
|
|||||
| Jenkins, R. K. B., Brady, L. D., Huston, K., Kauffmann, J. L. D., Rabearivony, J., Raveloson, G. & Rowcliffe, J. M. | 1999 | The population status of chameleons within Ranomafana National Park, Madagascar, and recommendations for future monitoring | ORYX 33:38--46 | ||
| Abstract: Malagasy chameleons are threatened by the relentless pace of habitat destruction. Their great popularity amongst herpetoculturalists has also resulted in collection for international animal markets. Most previous fieldwork has focused on the compilation of much needed species inventories, but little attention has been given to estimating chameleon population densities. This lack of information prevents a reliable assessment of the effects of habitat loss and direct exploitation on wild populations. A simple and repeatable methodology for the monitoring of chameleon populations is therefore urgently required. The present study developed survey techniques based on distance sampling within an area of relatively undisturbed rain forest at Ranomafana National Park. In total 394 individuals from six species were recorded and population densities (±SE) of 27.2 ± 5.4/ha Brookesia spp. and 21.4±4.0/ha Calumma spp. were estimated using the computer program DISTANCE. The authors propose that monitoring of chameleons in areas subject to different threats should begin immediately using the methods outlined in this paper. | |||||
BibTeX:
@article{Jenkins1999,
author = {Jenkins, R. K. B. and Brady, L. D. and Huston, K. and Kauffmann, J. L. D. and Rabearivony, J. and Raveloson, G. and Rowcliffe, J. M.},
title = {The population status of chameleons within Ranomafana National Park, Madagascar, and recommendations for future monitoring},
journal = {ORYX},
year = {1999},
volume = {33},
number = {1},
pages = {38--46}
}
|
|||||
| Jensen, A. L. | 1996 | Subsampling with line transects for estimation of animal abundance [BibTeX] |
Environmetrics 7:283--289 | ||
BibTeX:
@article{Jen96,
author = {Jensen, A. L.},
title = {Subsampling with line transects for estimation of animal abundance},
journal = {Environmetrics},
year = {1996},
volume = {7},
pages = {283--289}
}
|
|||||
| Jepson, P., Brickle, N. & Chayadin, Y. | 2001 | The conservation status of Tanimbar corella and blue-streaked lory on the Tanimbar Islands, Indonesia: Results of a rapid contextual survey [BibTeX] |
ORYX 35:224--233 | ||
BibTeX:
@article{Jepson2001,
author = {Jepson, P. and Brickle, N. and Chayadin, Y.},
title = {The conservation status of Tanimbar corella and blue-streaked lory on the Tanimbar Islands, Indonesia: Results of a rapid contextual survey},
journal = {ORYX},
year = {2001},
volume = {35},
number = {3},
pages = {224--233}
}
|
|||||
| Jessop, T. S., Forsyth, D. M., Purwandana, D., Imansyah, J., Opat, D. S. & McDonald-Madden, E. | 0000 | Monitoring the ungulate prey of komodo dragons Varanus komodoensis using faecal counts [BibTeX] |
: | ||
BibTeX:
@unpublished{Jessop,
author = {Jessop, T. S. and Forsyth, D. M. and Purwandana, D. and Imansyah, J. and Opat, D. S. and McDonald-Madden, E.},
title = {Monitoring the ungulate prey of komodo dragons \textit{Varanus komodoensis} using faecal counts},
year = {0000}
}
|
|||||
| Jett, D. A. & Nichols, J. D. | 1987 | A field comparison of nested grid and trapping web density estimators [BibTeX] |
Journal of Mammalogy 68:888--892 | ||
BibTeX:
@article{JetNic87,
author = {Jett, D. A. and Nichols, J. D.},
title = {A field comparison of nested grid and trapping web density estimators},
journal = {Journal of Mammalogy},
year = {1987},
volume = {68},
pages = {888--892}
}
|
|||||
| Jimenez, I., Londono, G. A. & Cadena, C. D. | 2003 | Efficiency, bias, and consistency of visual and aural surveys of curassows (Cracidae) in tropical forests [BibTeX] |
Journal of Field Ornithology 74:210--216 | ||
BibTeX:
@article{JIM03,
author = {Jimenez, I. and Londono, G. A. and Cadena, C. D.},
title = {Efficiency, bias, and consistency of visual and aural surveys of curassows ({C}racidae) in tropical forests},
journal = {Journal of Field Ornithology},
year = {2003},
volume = {74},
pages = {210--216}
}
|
|||||
| Jocqué, R., Samu, F. & Bird, T. | 2005 | Density of spiders (Araneae: Ctenidae) in Ivory Coast rainforests | Journal of Zoology 266:105--110 | ||
| Abstract: To monitor the biodiversity quality of rainforest fragments in the eastern region of the Ivory Coast, the density of at least one important invertebrate group needs to be determined. This has been possible for nocturnal hunting spiders from the family Ctenidae using a novel combination of sampling and census techniques. The reflective characteristics of the eyes of these spiders meant that individuals were readily located using headlamps. Collections were made along transects (total length 5.5 km), adopting a distance sampling protocol. Density was estimated using distance sampling models. More than 2600 ctenids (15 species) were captured and identified. Seven of these species were present in sufficient numbers for density assessment. The combined density of these seven most common species in degraded forest fragments (0.124 m -2) was only half that in less disturbed forest (0.240 m -2). Ctenidae are a promising candidate for future monitoring of invertebrate groups in the rainforest. © 2005 The Zoological Society of London. | |||||
| Review: Uses 1 sided transects, and it's not clear that they accounted for it Obtains density estimates wich are not proportional to number of observations, even though the detection function is said to be the same ???? Does not collect distances to uncaptured animals (which was stupid really... around only 80% g(0)) |
|||||
BibTeX:
@article{Jocque2005,
author = {Jocqu{\'e}, R. and Samu, F. and Bird, T.},
title = {Density of spiders (Araneae: Ctenidae) in Ivory Coast rainforests},
journal = {Journal of Zoology},
year = {2005},
volume = {266},
pages = {105--110}
}
|
|||||
| Johnsingh, A. J. T. & Joshua, J. | 1994 | Avifauna in 3 vegetation types on Mundanthurai Plateau, south India [BibTeX] |
Journal of Tropical Ecology 10:323--335 | ||
BibTeX:
@article{JohJos94,
author = {Johnsingh, A. J. T. and Joshua, J.},
title = {Avifauna in 3 vegetation types on {M}undanthurai {P}lateau, south {I}ndia},
journal = {Journal of Tropical Ecology},
year = {1994},
volume = {10},
pages = {323--335}
}
|
|||||
| Johnson, A., Knott, C., Pamungkas, B., Pasaribu, M. & Marshall, A. | 2005 | A survey of the orangutan (Pongo pygmaeus wurmbii) population in and around Gunung Palung National Park, West Kalimantan, Indonesia based on nest counts [BibTeX] |
Biological Conservation 121:495--507 | ||
| Review: Interesting remark about the need for accurate measuring, citing an author that says that overestimation of distances might have been the reason for underestimation of density. Singleton 2000. Ranging Behaviour and Seasonal Movements of Sumatran Orangutans (Pongo pygmaeus abelii) in Swamp Forests, Ph.D. Dissertation. The University of Kent at Canterbury, | |||||
BibTeX:
@article{Johnson2005,
author = {Johnson, A.E. and Knott, C.D. and Pamungkas, B. and Pasaribu, M. and Marshall, A.J.},
title = {A survey of the orangutan (\textit{Pongo pygmaeus wurmbii}) population in and around {Gunung Palung National Park, West Kalimantan, Indonesia} based on nest counts},
journal = {Biological Conservation},
year = {2005},
volume = {121},
number = {4},
pages = {495--507}
}
|
|||||
| Johnson, B. K., Lindzey, F. G. & Guenzel, R. J. | 1991 | Use of aerial line transect surveys to estimate pronghorn populations in Wyoming [BibTeX] |
Wildlife Society Bulletin 19:315--321 | ||
BibTeX:
@article{Johetal91,
author = {Johnson, B. K. and Lindzey, F. G. and Guenzel, R. J.},
title = {Use of aerial line transect surveys to estimate pronghorn populations in {W}yoming},
journal = {Wildlife Society Bulletin},
year = {1991},
volume = {19},
pages = {315--321}
}
|
|||||
| Johnson, D., Laake, J. & VerHoef, J. | 2009 | Package DSpat [BibTeX] |
: | ||
BibTeX:
@techreport{Johnson2009a,
author = {Devin Johnson and Jeff Laake and Jay VerHoef},
title = {Package DSpat},
year = {2009}
}
|
|||||
| Johnson, D. H. | 2008 | In Defense of Indices: The Case of Bird Surveys | Journal of Wildlife Management 72:857--868 | URL | |
| Abstract: Indices to population size have come under increasing criticism in recent years, on the grounds that indices might not faithfully represent the entire population. Most criticisms involve surveys of birds, particularly those based on point counts, which is my focus here. A variety of quantitative methods have been developed to reduce the bias of point counts, such as distance sampling, multiple-observer surveys, and time-of-detection methods. I argue that these developments are valuable, in that they enhance understanding of the detection process, but that their practical application may well be limited, likely to intensive studies focusing on a small number of species. These quantitative methods are not generally applicable to extensive, multiple-species surveys. Although criticism of the thoughtless use of indices is welcome, their wholesale rejection is not. | |||||
BibTeX:
@article{Johnson2008,
author = {Johnson, Douglas H.},
title = {In Defense of Indices: The Case of Bird Surveys},
journal = {Journal of Wildlife Management},
year = {2008},
volume = {72},
number = {4},
pages = {857--868
},
url = {http://dx.doi.org/10.2193%2F2007-294}
}
|
|||||
| Johnson, D. S., Laake, J. L. & Hoef, J. M. V. | 2010 | A Model-Based Approach for Making Ecological Inference from Distance Sampling Data [BibTeX] |
Biometrics 66:310--318 | DOI | |
BibTeX:
@article{Johnson2010a,
author = {Devin S. Johnson and Jeffrey L. Laake and Jay M. Ver Hoef},
title = {A Model-Based Approach for Making Ecological Inference from Distance Sampling Data},
journal = {Biometrics},
year = {2010},
volume = {66},
pages = {310--318},
doi = {10.1111/j.1541-0420.2009.01265.x}
}
|
|||||
| Johnson, E. G. & Routledge, R. D. | 1985 | The line transect method: a nonparametric estimator based on shape restrictions [BibTeX] |
Biometrics 41:669--679 | ||
BibTeX:
@article{JohRou85,
author = {Johnson, E. G. and Routledge, R. D.},
title = {The line transect method: a nonparametric estimator based on shape restrictions},
journal = {Biometrics},
year = {1985},
volume = {41},
pages = {669--679}
}
|
|||||
| Johnson, F. A., Pollock, K. H. & Montalbano, F., I. | 1989 | Visibility bias in aerial surveys of mottled ducks [BibTeX] |
Wildlife Society Bulletin 17:222--227 | ||
BibTeX:
@article{Johetal89,
author = {Johnson, F. A. and Pollock, K. H. and Montalbano, F., III.},
title = {Visibility bias in aerial surveys of mottled ducks},
journal = {Wildlife Society Bulletin},
year = {1989},
volume = {17},
pages = {222--227}
}
|
|||||
| Jones, J., McLeish, W. J. & Robertson, R. J. | 2000 | Density influences census technique accuracy for Cerulean Warblers in eastern Ontario [BibTeX] |
Journal of Field Ornithology 71:46-56 | ||
BibTeX:
@article{Jonetal00,
author = {Jones, J. and McLeish, W. J. and Robertson, R. J.},
title = {Density influences census technique accuracy for {C}erulean {W}arblers in eastern {O}ntario},
journal = {Journal of Field Ornithology},
year = {2000},
volume = {71},
pages = {46-56}
}
|
|||||
| Jones, M. J., Sullivan, M. S., Marsden, S. J. & Linsley, M. D. | 2001 | Correlates of extinction risk of birds from two Indonesian islands [BibTeX] |
Biological Journal of the Linnean Society 73:65--79 | ||
BibTeX:
@article{Jones2001,
author = {Jones, M. J. and Sullivan, M. S. and Marsden, S. J and Linsley, M. D.},
title = {Correlates of extinction risk of birds from two Indonesian islands},
journal = {Biological Journal of the Linnean Society},
year = {2001},
volume = {73},
pages = {65--79}
}
|
|||||
| Kaiser, L. | 1983 | Unbiased estimation in line-intercept sampling [BibTeX] |
Biometrics 39:965--976 | ||
BibTeX:
@article{Kai83,
author = {Kaiser, L.},
title = {Unbiased estimation in line-intercept sampling},
journal = {Biometrics},
year = {1983},
volume = {39},
pages = {965--976}
}
|
|||||
| Karanth, K. U. & Nichols, J. D. | 2002 | Monitoring tigers and their prey - a manual for researchers, managers and conservationists in tropical Asia [BibTeX] |
: | ||
BibTeX:
@book{Karanth2002,
author = {Karanth, K. U. and Nichols, J. D.},
title = {Monitoring tigers and their prey - a manual for researchers, managers and conservationists in tropical Asia},
publisher = {Centre for Wildlife Studies},
year = {2002}
}
|
|||||
| Karanth, K. U. & Sunquist, M. E. | 1995 | Prey selection by tiger, leopard and dhole in tropical forests [BibTeX] |
Journal of Animal Ecology 64:439--450 | ||
BibTeX:
@article{KarSun95,
author = {Karanth, K. U. and Sunquist, M. E.},
title = {Prey selection by tiger, leopard and dhole in tropical forests},
journal = {Journal of Animal Ecology},
year = {1995},
volume = {64},
pages = {439--450}
}
|
|||||
| Karanth, K. U. & Sunquist, M. E. | 1992 | Population structure, density and biomass of large herbivores in the tropical forests of Nagarahole, India [BibTeX] |
Journal of Tropical Ecology 8:21--35 | ||
BibTeX:
@article{KarSun92,
author = {Karanth, K. U. and Sunquist, M. E.},
title = {Population structure, density and biomass of large herbivores in the tropical forests of {N}agarahole, {I}ndia},
journal = {Journal of Tropical Ecology},
year = {1992},
volume = {8},
pages = {21--35}
}
|
|||||
| Karunamuni, R. J. & Quinn, T. J. | 1995 | Bayesian estimation of animal abundance for the line transects sampling [BibTeX] |
Biometrics 51:1325--37 | ||
BibTeX:
@article{KarQui95,
author = {Karunamuni, R. J. and Quinn, T. J.},
title = {Bayesian estimation of animal abundance for the line transects sampling},
journal = {Biometrics},
year = {1995},
volume = {51},
pages = {1325--37}
}
|
|||||
| Kasamatsu, F. & Joyce, G. G. | 1995 | Current status of odontocetes in the Antarctic [BibTeX] |
Antarctic Science 7:365--379 | ||
BibTeX:
@article{KasJoy95,
author = {Kasamatsu, F. and Joyce, G. G.},
title = {Current status of odontocetes in the {A}ntarctic},
journal = {Antarctic Science},
year = {1995},
volume = {7},
pages = {365--379}
}
|
|||||
| Kastdalen, L., Pedersen, H. C. & Fjone, G.and Andreassen, H. P. | Combining resource selection functions and distance sampling: an example with willow ptarmigan [BibTeX] |
Proceedings of the First International Conference on Resource Selection : | |||
BibTeX:
@inproceedings{Kastdalen,
author = {Kastdalen, L. and Pedersen, H. C. and Fjone, G.and Andreassen, H. P.},
title = {Combining resource selection functions and distance sampling: an example with willow ptarmigan},
booktitle = {Proceedings of the First International Conference on Resource Selection}
}
|
|||||
| Katsanevakis, S. | 2007 | Density surface modelling with line transect sampling as a tool for abundance estimation of marine benthic species: the Pinna nobilis example in a marine lake | Marine Biology 152:77-85 | ||
| Abstract: Density estimation of marine benthic fauna is most often conducted with fishery surveys using dredges or trawls. These estimates are often unreliable due to low and variable efficiency and are inappropriate when dealing with rare or endangered species. In the marine Lake Vouliagmeni, a density surface modelling (DSM) approach using survey data from line transects, integrated with a Geographic Information System (GIS), was used to estimate the population density of the endangered fan mussel Pinna nobilis. This is the first time that such an approach has been applied for a marine benthic species. DSM was beneficial in relation to traditional distance sampling. Apart from providing a more precise total abundance estimate, it related the density of the species to spatial covariates of interest, gave a depiction of the species dispersion in the study area, and provided abundance estimates in any subregion of the study area. In Lake Vouliagmeni, a marked zonation of P. nobilis distribution was revealed, with the species being restricted in the shallow peripheral zone at depths <22 m. Two density peaks were observed, a major peak at depths between 12 and 13 m and a secondary peak at ~4 m. A main hotspot of high density was also observed in the northeastern part of the lake. Total abundance of the species was estimated to be 6,770 individuals with a 95% confidence interval of 5,460–8,393 individuals. | |||||
BibTeX:
@article{Katsanevakis2007,
author = {Stelios Katsanevakis},
title = {Density surface modelling with line transect sampling as a tool for abundance estimation of marine benthic species: the \textit{Pinna nobilis} example in a marine lake},
journal = {Marine Biology},
year = {2007},
volume = {152},
pages = {77-85}
}
|
|||||
| Katsanevakis, S. | 2005 | Abundance and spatial distribution of the Mediterranean scallop, Pecten jacobaeus, in a marine lake [BibTeX] |
Fisheries Research 76:417--429 | URL PDF | |
BibTeX:
@article{Kat05,
author = {Katsanevakis, Stelios},
title = {Abundance and spatial distribution of the Mediterranean scallop, Pecten jacobaeus, in a marine lake},
journal = {Fisheries Research},
year = {2005},
volume = {76},
number = {3},
pages = {417--429},
url = {http://www.sciencedirect.com/science/article/B6T6N-4H27BV8-1/2/f8adb1702140292fabc9845ebc3e87fa}
}
|
|||||
| Katsanevakis, S. | 2005 | Population ecology of the endangered fan mussel Pinna nobilis in a marine lake | Endangered Species Research 1:1-9 | ||
| Abstract: A substantial population of the endangered Mediterranean bivalve Pinna nobilis exists in the marine Lake Vouliagmeni (Korinthiakos Gulf, Greece). The population density of P. nobilis was estimated in the lake with line transect sampling. Individuals of the youngest age class (small) had peak densities in the 1 to 3 m bathymetric zone and their densities were higher in poorly sorted sediments. Older (large) individuals (belonging to all age classes except the first one, 9 to 11 mo) had peak densities in the 11 to 13 m bathymetric zone. No P. nobilis was found deeper than 22 m. The absence of large individuals in shallow waters may partly be explained by illegal fishing. There are several hypotheses proposed to explain the lack of small individuals in deeper areas, but no definitive explanation is offered. In Lake Vouliagmeni, P. nobilis densities were high, although marine seagrass was completely absent. Thus, P. nobilis does not actually require seagrass meadows, as stated by many authors, and it may exist in large numbers in bare soft-sediment areas as well. P. nobilis grew fast, mostly during the first 3 yr of life, and may live beyond 15 yr. By recording the exact location of each P. nobilis individual within 800 m2 transects, as a pair of coordinates, the exact spatial distribution was defined and aggregation indices were calculated. P. nobilis had an aggregated dispersion, but no evidence for preferential settlement near adults or previously-settled individuals was found. The aggregated dispersion of P. nobilis probably relates to the patchiness of the local environment. The size of P. nobilis population in Lake Vouliagmeni was estimated to be 8501 ± 4395 (mean ± 1 SD) individuals, of which 4355 ± 3460 belonged to the first age class and 4146 ± 1405 belonged to all other age classes. |
|||||
BibTeX:
@article{Katsanevakis2005,
author = {Katsanevakis, S},
title = {Population ecology of the endangered fan mussel Pinna nobilis in a marine lake},
journal = {Endangered Species Research},
year = {2005},
volume = {1},
pages = {1-9}
}
|
|||||
| Katsanevakis, S. & Thessalou-Legaki, M. | 2009 | Spatial distribution, abundance and habitat use of the protected fan mussel Pinna nobilis in Souda Bay, Crete [BibTeX] |
Aquatic Biology 8:45–54 | ||
BibTeX:
@article{Katsanevakis2009,
author = {Stelios Katsanevakis and Maria Thessalou-Legaki},
title = {Spatial distribution, abundance and habitat use of the protected fan mussel \textit{Pinna nobilis} in {Souda Bay, Crete}},
journal = {Aquatic Biology},
year = {2009},
volume = {8},
pages = {45–54}
}
|
|||||
| Katsanevakis, S. & Thessalou-Legaki, M. | 2007 | First record of Alicia mirabilis (Anthozoa: Actiniaria) from the Aegean Sea and density assessment with distance sampling in a site of high abundance [BibTeX] |
Marine Biology Research 3:468--472 | ||
BibTeX:
@article{Katsanevakis2007a,
author = {Katsanevakis, S and Thessalou-Legaki, M},
title = {First {record of \textit{Alicia mirabilis} (Anthozoa: Actiniaria) from the Aegean Sea and density assessment with distance sampling in a site of high abundance}},
journal = {Marine Biology Research},
year = {2007},
volume = {3},
pages = {468--472}
}
|
|||||
| Kelker, G. H. | 1945 | Measurement and interpretation of forces that determine populations of managed deer [BibTeX] |
: | ||
BibTeX:
@phdthesis{Kel45,
author = {Kelker, G. H.},
title = {Measurement and interpretation of forces that determine populations of managed deer},
school = {University of Michigan},
year = {1945}
}
|
|||||
| Kelley, J. R. | 1996 | Line transect sampling for estimating breeding wood duck density in forested wetlands [BibTeX] |
Wildlife Society Bulletin 24:32--36 | ||
BibTeX:
@article{Kel96,
author = {Kelley, J. R.},
title = {Line transect sampling for estimating breeding wood duck density in forested wetlands},
journal = {Wildlife Society Bulletin},
year = {1996},
volume = {24},
pages = {32--36}
}
|
|||||
| Kenneth, B. | 2001 | Temporal variation in fall bird density at high elevation habitats in southern British Columbia: an analisys using distance sampling [BibTeX] |
: | ||
BibTeX:
@techreport{Kenneth2001,
author = {Kenneth, B.H.},
title = {Temporal variation in fall bird density at high elevation habitats in southern British Columbia: an analisys using distance sampling},
year = {2001}
}
|
|||||
| Keŕy, M., Royle, J. & Schmid, H. | 2005 | Modeling avian abundance from replicated counts using binomial mixture models | Ecological Applications 15:1450--1461 | ||
| Abstract: Abundance estimation in ecology is usually accomplished by capture-recapture, removal, or distance sampling methods. These may be hard to implement at large spatial scales. In contrast, binomial mixture models enable abundance estimation without individual identification, based simply on temporally and spatially replicated counts. Here, we evaluate mixture models using data from the national breeding bird monitoring program in Switzerland, where some 250 1-km2 quadrats are surveyed using the territory mapping method three times during each breeding season. We chose eight species with contrasting distribution (wide-narrow), abundance (high-low), and detectability (easy-difficult). Abundance was modeled as a random effect with a Poisson or negative binomial distribution, with mean affected by forest cover, elevation, and route length. Detectability was a logit-linear function of survey date, survey date-by-elevation, and sampling effort (time per transect unit). Resulting covariate effects and parameter estimates were consistent with expectations. Detectability per territory (for three surveys) ranged from 0.66 to 0.94 (mean 0.84) for easy species, and from 0.16 to 0.83 (mean 0.53) for difficult species, depended on survey effort for two easy and all four difficult species, and changed seasonally for three easy and three difficult species. Abundance was positively related to route length in three high-abundance and one low-abundance (one easy and three difficult) species, and increased with forest cover in five forest species, decreased for two nonforest species, and was unaffected for a generalist species. Abundance estimates under the most parsimonious mixture models were between 1.1 and 8.9 (median 1.8) times greater than estimates based on territory mapping; hence, three surveys were insufficient to detect all territories for each species. We conclude that binomial mixture models are an important new approach for estimating abundance corrected for detectability when only repeated-count data are available. Future developments envisioned include estimation of trend, occupancy, and total regional abundance. © 2005 by the Ecological Society of America. | |||||
BibTeX:
@article{Kery2005,
author = {Ke{\'r}y, M. and Royle, J.A. and Schmid, H.},
title = {Modeling avian abundance from replicated counts using binomial mixture models},
journal = {Ecological Applications},
year = {2005},
volume = {15},
number = {4},
pages = {1450--1461}
}
|
|||||
| Khan, J. A. | 1995 | Conservation and management of Gir Lion Sanctuary and National Park, Gujarat, India [BibTeX] |
Biological Conservation 73:183--188 | ||
BibTeX:
@article{Kha95,
author = {Khan, J. A.},
title = {Conservation and management of {G}ir {L}ion {S}anctuary and {N}ational {P}ark, {G}ujarat, {I}ndia},
journal = {Biological Conservation},
year = {1995},
volume = {73},
pages = {183--188}
}
|
|||||
| Kidney, D. | 2009 | Line transect sampling using triangulation: investigating the effect of bearing error on density estimation [BibTeX] |
: | ||
BibTeX:
@mastersthesis{Kidney2009,
author = {Darren Kidney},
title = {Line transect sampling using triangulation: investigating the effect of bearing error on density estimation},
school = {University of St Andrews},
year = {2009}
}
|
|||||
| Kie, J. G. & Boroski, B. B. | 1995 | Using spotlight counts to estimate mule deer population size and trends [BibTeX] |
California Fish and Game 81:55--70 | ||
BibTeX:
@article{KieBor95,
author = {Kie, J. G. and Boroski, B. B.},
title = {Using spotlight counts to estimate mule deer population size and trends},
journal = {California Fish and Game},
year = {1995},
volume = {81},
pages = {55--70}
}
|
|||||
| Kiffner, C., Meyer, B., Muhlenberg, M. & Waltert, M. | 2009 | Plenty of prey, few predators: what limits lions Panthera leo in Katavi National Park, western Tanzania? [BibTeX] |
Oryx 43:52--59 | ||
BibTeX:
@article{Kiffner2009,
author = {Christian Kiffner and Britta Meyer and Michael Muhlenberg and Matthias Waltert},
title = {Plenty of prey, few predators: what limits {lions \textit{Panthera leo} in Katavi National Park, western Tanzania}?},
journal = {Oryx},
year = {2009},
volume = {43},
pages = {52--59}
}
|
|||||
| Kingsley, M. C. S. & Reeves, R. R. | 1998 | Aerial surveys of cetaceans in the Gulf of St. Lawrence in 1995 and 1996 [BibTeX] |
Canadian Journal of Zoology 76:1529--1550 | ||
BibTeX:
@article{KinRee98,
author = {Kingsley, M. C. S. and Reeves, R. R.},
title = {Aerial surveys of cetaceans in the {G}ulf of {S}t. {L}awrence in 1995 and 1996},
journal = {Canadian Journal of Zoology},
year = {1998},
volume = {76},
pages = {1529--1550}
}
|
|||||
| Kint, V., Robert, D. & Noël, L. | 2004 | Evaluation of sampling methods for the estimation of structural indices in forest stands | Ecological Modelling 180:461--476 | ||
| Abstract: The paper is about the accurate (i.e. unbiased and precise) and efficient estimation of structural indices in forest stands. We present SIAFOR, a computer programme for the calculation of four nearest-neighbour indices, which describe the spatial arrangement of tree positions, the distribution pattern of species, and the size differentiation between trees. The study uses SIAFOR as a sampling simulator in eight completely stem-mapped forest stands of varying area and structural complexity. We statistically evaluate two sample types (distance and plot sampling), comparing sampling error, bias and minimum sample size for index estimation. We introduce the concepts of measurement expansion factor (MEF) and design expansion factor (DEF) for the technical evaluation of sample type efficiency (optimal sample type). Results indicate that sampling error can reach high levels and that minimum sample sizes for index estimation often amply exceed the limit of 20% of tree density or 20 trees per species per hectare, that we set as the highest feasible sample size in normal situations. We found clear feasibility limits (in terms of minimal tree densities and reachable accuracy levels) for the estimation of all investigated indices. Generally, equal or higher sample sizes are needed for plot sampling than for distance sampling to reach equal accuracy levels. Nevertheless, plot sampling resulted more efficient for the estimation of tree size differentiation at low to medium accuracy levels. For all other investigated indices distance sampling resulted more efficient than plot sampling. Minimum sample size increases with accuracy and is negatively correlated with tree density. At a given accuracy level minimum sample size is highest for the estimation of relative mingling and lowest for tree size differentiation; furthermore it is generally lower in large stands than in small ones. Because of the consistency of our conclusions in all of the investigated stands, we think they apply in most stands of similar area (between 1 and 10 ha) and species diversity (not more than four species). © 2004 Elsevier B.V. All rights reserved. | |||||
BibTeX:
@article{Kint2004,
author = {Kint, V. and Robert, D.W. and No{\"e}l, L.},
title = {Evaluation of sampling methods for the estimation of structural indices in forest stands},
journal = {Ecological Modelling},
year = {2004},
volume = {180},
number = {4},
pages = {461--476}
}
|
|||||
| Kinzey, D. & Gerrodette, T. | 2003 | Distance measurements using binoculars from ships at sea: accuracy, precision and effects of refraction [BibTeX] |
Journal of Cetacean Research and Management 5:159--171 | ||
BibTeX:
@article{Kinzey2003,
author = {Douglas Kinzey and Tim Gerrodette},
title = {Distance measurements using binoculars from ships at sea: accuracy, precision and effects of refraction},
journal = {Journal of Cetacean Research and Management},
year = {2003},
volume = {5},
pages = {159--171}
}
|
|||||
| Kinzey, D., Gerrodette, T. & Fink, D. | 2002 | Accuracy and precision of perpendicular distance measurements in shipboard line-transect sighting surveys [BibTeX] |
: | ||
BibTeX:
@techreport{Kinetal2002,
author = {Douglas Kinzey and Tim Gerrodette and Daniel Fink},
title = {Accuracy and precision of perpendicular distance measurements in shipboard line-transect sighting surveys},
year = {2002},
number = { LJ-02-09}
}
|
|||||
| Kinzey, D., Olson, P. & Gerrodette, T. | Marine Mammal Data Collection Procedures on Research Ship Line-Transect Surveys [BibTeX] |
: | |||
BibTeX:
@techreport{Kinzey,
author = {Douglas Kinzey and Paula Olson and Tim Gerrodette},
title = {Marine Mammal Data Collection Procedures on Research Ship Line-Transect Surveys}
}
|
|||||
| Kishino, H., Kasamatsu, F. & Toda, T. | 1988 | On the double line transect method [BibTeX] |
Report of the International Whaling Commission 38:273--279 | ||
BibTeX:
@article{Kisetal88,
author = {Kishino, H. and Kasamatsu, F. and Toda, T.},
title = {On the double line transect method},
journal = {Report of the International Whaling Commission},
year = {1988},
volume = {38},
pages = {273--279}
}
|
|||||
| Kishino, H., Kato, H., Kasamatsu, F. & Fujise, Y. | 1991 | Detection of heterogeneity and estimation of population characteristics from the field survey data: 1987/88 Japanese feasibility study of the Southern Hemisphere minke whales [BibTeX] |
Annals of the Institute of Statistical Mathematics 43:435--453 | ||
BibTeX:
@article{Kisetal91,
author = {Kishino, H. and Kato, H. and Kasamatsu, F. and Fujise, Y.},
title = {Detection of heterogeneity and estimation of population characteristics from the field survey data: 1987/88 {J}apanese feasibility study of the {S}outhern {H}emisphere minke whales},
journal = {Annals of the Institute of Statistical Mathematics},
year = {1991},
volume = {43},
pages = {435--453}
}
|
|||||
| Kissling, M. & Garton, E. | 2006 | Estimating detection probability and density from point-count surveys: A combination of distance and double-observer sampling | Auk 123:735--752 | ||
| Abstract: Point counts are the method most commonly used to estimate abundance of birds, but they often fail to account properly for incomplete and variable detection probabilities. We developed a technique that combines distance and double-observer sampling to estimate detection probabilities and effective area surveyed. We applied this paired-observer, variable circular-plot (POVCP) technique to point-count surveys (n = 753) conducted in closed-canopy forests of southeast Alaska. Distance data were analyzed for each species to model a detection probability for each observer and calculate an estimate of density. We then multiplied each observer's density estimates by a correction factor to adjust for detection probabilities <1 at plot center. We compared analytical results from four survey methods: single-observer fixed-radius (50-m) plot; single-observer, variable circular-plot (SOVCP); double-observer fixed-radius (50-m) plot; and POVCP. We examined differences in detection probabilities at plot center, effective area surveyed, and densities for five bird species: Pacific-slope Flycatcher (Empidonax difficilis), Winter Wren (Troglodytes troglodytes), Golden-crowned Kinglet (Regulus satrapa), Hermit Thrush (Catharus guttatus), and Townsend's Warbler (Dendroica townsendi). Average detection probabilities for paired observers increased ?8% (SE = 2.9) for all species once estimates were corrected for birds missed at plot center. Density estimators of fixed-radius survey methods were likely negatively biased, because the key assumption of perfect detection was not met. Density estimates generated using SOVCP and POVCP were similar, but standard errors were much lower for the POVCP survey method. We recommend using POVCP when study objectives require precise estimates of density. Failure to account for differences in detection probabilities and effective area surveyed results in biased population estimators and, therefore, faulty inferences about the population in question. © The American Ornithologists' Union, 2006. | |||||
BibTeX:
@article{Kissling2006,
author = {Kissling, M.L. and Garton, E.O.},
title = {Estimating detection probability and density from point-count surveys: A combination of distance and double-observer sampling},
journal = {Auk},
year = {2006},
volume = {123},
number = {3},
pages = {735--752}
}
|
|||||
| Kissling, M. L., Reid, M., Lukacs, P. M., Gende, S. M. & Lewis, S. B. | 2007 | Understanding abundance patterns of a declining seabird: implications for monitoring [BibTeX] |
Ecological Applications 17:2164--2174 | ||
BibTeX:
@article{Kissling2007,
author = {Michelle L. Kissling and Mason Reid and Paul M. Lukacs and Scott M. Gende and Stephen B. Lewis},
title = {Understanding abundance patterns of a declining seabird: implications for monitoring},
journal = {Ecological Applications},
year = {2007},
volume = {17},
pages = {2164--2174}
}
|
|||||
| Kitahara, M. & Fujii, K. | 1994 | Biodiversity and community structure of temperate butterfly species within a gradient of human disturbance --- an analysis based on the concept of generalist vs specialist strategies [BibTeX] |
Researches on Population Ecology 36:187--199 | ||
BibTeX:
@article{KitFuj94,
author = {Kitahara, M. and Fujii, K.},
title = {Biodiversity and community structure of temperate butterfly species within a gradient of human disturbance --- an analysis based on the concept of generalist vs specialist strategies},
journal = {Researches on Population Ecology},
year = {1994},
volume = {36},
pages = {187--199}
}
|
|||||
| Klavitter, J. L. | 2000 | Survey methodology, abundance and demography of the endangered Hawaiian hawk: is delisting warranted? [BibTeX] |
: | ||
BibTeX:
@mastersthesis{Kla00,
author = {Klavitter, J. L.},
title = {Survey methodology, abundance and demography of the endangered Hawaiian hawk: is delisting warranted?},
school = {University of Washington},
year = {2000}
}
|
|||||
| Klavitter, J. L., Marzluff, J. M. & Vekasy, M. S. | 2003 | Abundance and demography of the Hawaiian hawk: is delisting warranted? [BibTeX] |
Journal of Wildlife Management 67:165--176 | ||
BibTeX:
@article{Klaetal03,
author = {Klavitter, J. L and Marzluff, J. M. and Vekasy, M. S.},
title = {Abundance and demography of the Hawaiian hawk: is delisting warranted?},
journal = {Journal of Wildlife Management},
year = {2003},
volume = {67},
pages = {165--176}
}
|
|||||
| Knopf, F. L. | 1986 | Changing landscapes and the cosmopolitism of the eastern Colorado avifauna [BibTeX] |
Wildlife Society Bulletin 14:132--142 | ||
BibTeX:
@article{Kno86,
author = {Knopf, F. L.},
title = {Changing landscapes and the cosmopolitism of the eastern {C}olorado avifauna},
journal = {Wildlife Society Bulletin},
year = {1986},
volume = {14},
pages = {132--142}
}
|
|||||
| Knopf, F. L., Sedgwick, J. A. & Cannon, R. W. | 1988 | Guild structure of a riparian avifauna relative to seasonal cattle grazing [BibTeX] |
Journal of Wildlife Management 52:280--290 | ||
BibTeX:
@article{Knoetal88,
author = {Knopf, F. L. and Sedgwick, J. A. and Cannon, R. W.},
title = {Guild structure of a riparian avifauna relative to seasonal cattle grazing},
journal = {Journal of Wildlife Management},
year = {1988},
volume = {52},
pages = {280--290}
}
|
|||||
| Koenen, K., DeStefano, S. & Krausman, P. | 2002 | Using distance sampling to estimate seasonal densities of desert mule deer in a semidesert grassland | Wildlife Society Bulletin 30:53--63 | ||
| Abstract: Wildlife managers need to be able to assess density, distribution, and status of wildlife populations with reliable techniques. We used distance sampling from 971 point transects to estimate density and examine herd composition of desert mule deer (Odocoileus hemionus) on the Buenos Aires National Wildlife Refuge in southeastern Arizona during 4 seasons in 1996. We first conducted a pilot study to refine survey design and train observers. We also evaluated our ability to meet 4 major assumptions of distance sampling (random placement of points, objects on points always detected, objects detected at initial location, distances measured accurately). Densities varied from 0.9 (SE=0.3) deer/km2 in summer to 2.5 (1.3) in winter. Herd size varied from 1.5 (0.1) deer/group in summer to 9.7 (2.0) in winter. Density of females was greater than males (0.9 [0.3] and 0.03 [0.04], respectively) for all seasons combined. We found that placement of points, detecting deer at points, and not forcing deer to move from their initial location were interrelated and a function of mule deer behavior and how we approached points. Our ability to measure distances accurately was improved greatly by using distance test courses and calibration points throughout the refuge. Important considerations in using distance sampling include: 1) careful evaluation of study design; 2) establishment of permanent survey points to be used throughout time, which aids in field operations and analysis; 3) development and use of a distance test course and calibration points to train observers, practice measuring distances, and calibrate equipment; 4) development of standardized protocol to maintain consistent data collection among observers and over time; and 5) incorporation of a thorough understanding of the target species' behavior and ecology into the survey design. | |||||
BibTeX:
@article{Koenen2002,
author = {Koenen, K.K.G. and DeStefano, S. and Krausman, P.R.},
title = {Using distance sampling to estimate seasonal densities of desert mule deer in a semidesert grassland},
journal = {Wildlife Society Bulletin},
year = {2002},
volume = {30},
number = {1},
pages = {53--63}
}
|
|||||
| Koopman, B. O. | 1956 | The theory of search II. Target detection [BibTeX] |
Operations Research 4:503--531 | ||
BibTeX:
@article{Koo56,
author = {Koopman, B. O.},
title = {The theory of search {II}. {T}arget detection},
journal = {Operations Research},
year = {1956},
volume = {4},
pages = {503--531}
}
|
|||||
| Koster, S. H. | 1985 | An evaluation of line transect census methods in West African wooded savanna [BibTeX] |
: | ||
BibTeX:
@phdthesis{Kos85,
author = {Koster, S. H.},
title = {An evaluation of line transect census methods in {W}est {A}frican wooded savanna},
school = {Michigan State University},
year = {1985}
}
|
|||||
| Kouakou, L. Y., Boesch, C. & Kuehl, H. | 2009 | Estimating chimpanzee population size with nest counts: validating methods in Tai national park [BibTeX] |
American Journal of Primatology 71:447--457 | ||
BibTeX:
@article{Kouakou2009,
author = {Lestin Yao Kouakou and Christophe Boesch and Hjalmar Kuehl},
title = {Estimating chimpanzee population size with nest counts: validating methods in Tai national park},
journal = {American Journal of Primatology},
year = {2009},
volume = {71},
pages = {447--457}
}
|
|||||
| Kovner, J. L. & Patil, S. A. | 1974 | Properties of estimators of wildlife population density for the line transect method | Biometrics 30:225--230 | ||
| Abstract: The variance of several estimators of the population density based on the line transect method of distance sampling are studied under exponential sighting probability. The estimator suggested by Gates [1969] is shown to be minimum variance unbiased estimator. Efficiency of other estimators is obtained with respect to this estimator. | |||||
BibTeX:
@article{Kovner1974,
author = {Kovner, J. L. and Patil, S. A.},
title = {Properties of estimators of wildlife population density for the line transect method},
journal = {Biometrics},
year = {1974},
volume = {30},
number = {2},
pages = {225--230}
}
|
|||||
| Kraus, J. | 1997 | Counting furtive beasts by computer | Communications of the ACM 40:20--23 | ||
| Abstract: Counting Furtive Beasts by Computer. Where have all the rhinos gone? | |||||
BibTeX:
@article{Kraus1997,
author = {Kraus, J.},
title = {Counting furtive beasts by computer},
journal = {Communications of the ACM},
year = {1997},
volume = {40},
number = {6},
pages = {20--23}
}
|
|||||
| Kruger, J. M., Reilly, B. K. & Whyte, I. J. | 2008 | Application of distance sampling to estimate population densities of large herbivores in Kruger National Park [BibTeX] |
Wildlife research 35:371--376 | ||
BibTeX:
@article{Kruger2008,
author = {Kruger, J. M. and Reilly, B. K. and Whyte, I. J.},
title = {Application of distance sampling to estimate population densities of large herbivores in Kruger National Park},
journal = {Wildlife research},
year = {2008},
volume = {35},
pages = {371--376}
}
|
|||||
| Krzysik, J. A., Woodman, A. P. & Hagan, M. | 1995 | A field evaluation of four methods for estimating desert tortoise densities [BibTeX] |
Proceedings of the Desert Tortoise Council 1995:92 | ||
BibTeX:
@article{Krzetal95,
author = {Krzysik, J. A and Woodman, A. P. and Hagan, M.},
title = {A field evaluation of four methods for estimating desert tortoise densities},
journal = {Proceedings of the Desert Tortoise Council},
year = {1995},
volume = {1995},
pages = {92}
}
|
|||||
| Kuitunen, M., Rossi, E. & Stenroos, A. | 1998 | Do highways influence density of land birds? [BibTeX] |
Environmental Management 22:297--302 | ||
| Review: Neste trabalho é estudada a influência de uma estrada na densidade de pássaros. São considerados 2 transectos paralelos à estrada, um a 25 m e outro a 200 metros. É utilizada a metodologia das bandas, de Jarvien & Vaisanen. Uma coisa bastante estupida é que em cada dia o primeiro transecto é sempre realizado primeiro, supostamente para reduzir a influênciaa do tráfico. Mas se houver qualquer relação entre actividade e hora do dia este é um exemplo de confundimento total de factores. Aparentemente algumas aves são influenciadas pela estrada, embora a comunidade em geral não seja muito distinta entre os dois locais. Têm uma boa tabela com dados que podem ser analisados. No entanto, não percebo como é que algumas das análises foram feitas, pois o nº total de observações é reduzidissimo! |
|||||
BibTeX:
@article{Kuietal98,
author = {Kuitunen, M. and Rossi, E. and Stenroos, A.},
title = {Do highways influence density of land birds?},
journal = {Environmental Management},
year = {1998},
volume = {22},
pages = {297--302}
}
|
|||||
| Kulbicki, M. & Sarramégna, S. | 1999 | Comparison of density estimates derived from strip transect and distance sampling for underwater visual censuses: a case study of Chaetodontidae and Pomacanthidae [BibTeX] |
Aquatic Living Resources 12:315--325 | ||
BibTeX:
@article{KulSar99,
author = {Kulbicki, M. and Sarram{\'e}gna, S.},
title = {Comparison of density estimates derived from strip transect and distance sampling for underwater visual censuses: a case study of {Chaetodontidae and Pomacanthidae}},
journal = {Aquatic Living Resources},
year = {1999},
volume = {12},
pages = {315--325}
}
|
|||||
| Kumar, N. | 2000 | Ungulate density and biomass in the tropical semi-arid forest of Ranthambore, India [BibTeX] |
: | ||
BibTeX:
@mastersthesis{Kumar2000,
author = {Kumar, N.S.},
title = {Ungulate density and biomass in the tropical semi-arid forest of Ranthambore, India},
school = {Salim Ali School of Ecology and Environmental Sciences, Pondicherry University},
year = {2000}
}
|
|||||
| Kyhn, L. | 2010 | Passive acoustic monitoring of toothed whales, with implications for mitigation, management and biology [BibTeX] |
: | ||
BibTeX:
@phdthesis{Kyhn2010,
author = {Line Kyhn},
title = {Passive acoustic monitoring of toothed whales, with implications for mitigation, management and biology},
school = {Department of Arctic Environment, National Environmental Research Institute, Aarhus University, Denmark},
year = {2010}
}
|
|||||
| Kühl, H., Maisels, F., Ancrenaz, M. & Williamson, E. A. | 2008 | Best Practice Guidelines for Surveys and Monitoring of Great Ape Populations [BibTeX] |
: | ||
BibTeX:
@techreport{Kuehl2008,
author = {Kühl, H. and Maisels, F. and Ancrenaz, M. and Williamson, E. A.},
title = {Best Practice Guidelines for Surveys and Monitoring of Great Ape Populations},
year = {2008}
}
|
|||||
| Laake, J. | 2006 | A Biologist's Nightmare Fairy Tale of Mark-Recapture Distance Sampling [BibTeX] |
: | ||
| Review: Ver tb o ficheiro MRDS.ppt que está na pasta phdvariosp>Tenho IMPRESSO | |||||
BibTeX:
@unpublished{Laake2006,
author = {Jeff Laake},
title = {A Biologist's Nightmare Fairy Tale of Mark-Recapture Distance Sampling},
year = {2006}
}
|
|||||
| Laake, J., Collier, B., Morrison, M. & Wilkins, R. | 2011 | Point-based mark-recapture distance sampling [BibTeX] |
Journal of Agricultural, Biological and Environmental Statistics : | DOI | |
BibTeX:
@article{Laake2011,
author = {Laake, J.L. and Collier, B.A. and Morrison, M.L. and Wilkins, R.N.},
title = {Point-based mark-recapture distance sampling},
journal = {Journal of Agricultural, Biological and Environmental Statistics},
year = {2011},
doi = {10.1007/s13253-011-0059-5}
}
|
|||||
| Laake, J., Dawson, M. & Hone, J. | 2008 | Visibility bias in aerial survey: mark-recapture, line-transect or both? [BibTeX] |
Wildlife Research 35:299--309 | ||
BibTeX:
@article{Laake2008,
author = {Laake, J. and Dawson, M.J. and Hone, J.},
title = {Visibility bias in aerial survey: mark-recapture, line-transect or both?},
journal = {Wildlife Research},
year = {2008},
volume = {35},
pages = {299--309}
}
|
|||||
| Laake, J., Guenzel, R. J., Bengtson, J. L., Boveng, P., Cameron, M. & Hanson, M. B. | 2008 | Coping with variation in aerial survey protocol for line-transect sampling [BibTeX] |
Wildlife Research 35:289--299 | ||
BibTeX:
@article{Laake2008a,
author = {Laake, J. and Guenzel, R. J. and Bengtson, J. L. and Boveng, P. and Cameron, M. and Hanson, M. B.},
title = {Coping with variation in aerial survey protocol for line-transect sampling},
journal = {Wildlife Research},
year = {2008},
volume = {35},
pages = {289--299}
}
|
|||||
| Laake, J. L. | 1999 | Distance sampling with independent observers: reducing bias from heterogeneity by weakening the conditional independence assumption [BibTeX] |
Marine Mammal Survey and Assessment Methods :137--148 | ||
BibTeX:
@incollection{Laa99,
author = {Laake, J. L.},
title = {Distance sampling with independent observers: reducing bias from heterogeneity by weakening the conditional independence assumption},
booktitle = {Marine Mammal Survey and Assessment Methods},
publisher = {Balkema},
year = {1999},
pages = {137--148}
}
|
|||||
| Laake, J. L. | 1981 | Abundance estimation of dolphins in the eastern Pacific with line transect sampling --- a comparison of the techniques and suggestions for future research [BibTeX] |
Report of the Workshop on Tuna-Dolphin Interactions :56--95 | ||
BibTeX:
@incollection{Laa81,
author = {Laake, J. L.},
title = {Abundance estimation of dolphins in the eastern {P}acific with line transect sampling --- a comparison of the techniques and suggestions for future research},
booktitle = {Report of the Workshop on Tuna--Dolphin Interactions},
publisher = {Inter-American Tropical Tuna Commission, Special Report Number 4},
year = {1981},
pages = {56--95}
}
|
|||||
| Laake, J. L. | 1978 | Line transect sampling estimators robust to animal movement [BibTeX] |
: | ||
BibTeX:
@mastersthesis{LAA78,
author = {Laake,J. L.},
title = {Line transect sampling estimators robust to animal movement},
school = {Utah State University},
year = {1978}
}
|
|||||
| Laake, J. L. & Borchers, D. L. | 2004 | Methods for incomplete detection at distance zero [BibTeX] |
Advanced Distance Sampling :108-189 | ||
BibTeX:
@incollection{LAABOR04,
author = {Laake, J. L. and Borchers, D. L.},
title = {Methods for incomplete detection at distance zero},
booktitle = {Advanced Distance Sampling},
publisher = {Oxford University Press},
year = {2004},
pages = {108-189}
}
|
|||||
| Laake, J. L., Calambokidis, J. C., Osmek, S. D. & Rugh, D. J. | 1997 | Probability of detecting harbor porpoise from aerial surveys: estimating g(0) [BibTeX] |
Journal of Wildlife Management 61:63--75 | ||
BibTeX:
@article{Laa97,
author = {Laake, J. L and Calambokidis, J. C and Osmek, S. D. and Rugh, D. J.},
title = {Probability of detecting harbor porpoise from aerial surveys: estimating \textit{g(0)}},
journal = {Journal of Wildlife Management},
year = {1997},
volume = {61},
pages = {63--75}
}
|
|||||
| Labrosse, P., Kulbicki, M. & Ferraris, J. | 2002 | Underwater visual fish census surveys: proper use and implementation [BibTeX] |
: | ||
BibTeX:
@techreport{Labrosse2002,
author = {Pierre Labrosse and Michel Kulbicki and Jocelyne Ferraris},
title = {Underwater visual fish census surveys: proper use and implementation},
year = {2002}
}
|
|||||
| Labrosse, P., Kulbicki, M. & Ferraris, J. | 2001 | Comptage Visuel de poissons en plongée [BibTeX] |
: | ||
BibTeX:
@book{Labrosse2001,
author = {Labrosse, P. and Kulbicki, M. and Ferraris, J.},
title = {Comptage Visuel de poissons en plongée},
publisher = {Secrétariat Général de la Communauté du Pacifique},
year = {2001}
}
|
|||||
| Lacki, M. J., Hummer, J. W. & Fitzgerald, J. L. | 1994 | Application of line transects for estimating population density of the endangered copperbelly water snake in southern Indiana [BibTeX] |
Journal of Herpetology 28:241--245 | ||
BibTeX:
@article{Lacetal94,
author = {Lacki, M. J. and Hummer, J. W. and Fitzgerald, J. L.},
title = {Application of line transects for estimating population density of the endangered copperbelly water snake in southern {I}ndiana},
journal = {Journal of Herpetology},
year = {1994},
volume = {28},
pages = {241--245}
}
|
|||||
| Laing, S. E., Buckland, S. T., Burn, R. W., Lambie, D. & Amphlett, A. | 2003 | Dung and nest surveys: estimating decay rate [BibTeX] |
Journal of Applied Ecology 40:1102--1111 | ||
BibTeX:
@article{Laietal03,
author = {Laing, S. E and Buckland, S. T and Burn, R. W and Lambie, D. and Amphlett, A.},
title = {Dung and nest surveys: estimating decay rate},
journal = {Journal of Applied Ecology},
year = {2003},
volume = {40},
pages = {1102--1111}
}
|
|||||
| Langbein, J., Hutchings, M. R., Harris, S., Stoate, C., Tapper, S. C. & Wray, S. | 1999 | Techniques for assessing the abundance of Brown Hares Lepus europaeus [BibTeX] |
Mammal Review 29:93--116 | ||
BibTeX:
@article{LAN99,
author = {Langbein, J. and Hutchings, M. R. and Harris, S. and Stoate, C. and Tapper, S. C. and Wray, S.},
title = {Techniques for assessing the abundance of Brown Hares \textit{Lepus europaeus}},
journal = {Mammal Review},
year = {1999},
volume = {29},
pages = {93--116}
}
|
|||||
| Larsen, F., Heide-Jørgensen, M. P., Martin, A. R. & Born, E. W. | 1994 | Line-transect estimation of abundance of narwhals (Monodon monoceros) in Scoresby Sund and adjacent waters [BibTeX] |
Meddr Grønland, Bioscience 39:87--91 | ||
BibTeX:
@article{Larsen1994,
author = {Larsen, F. and Heide-Jørgensen, M. P. and Martin, A. R. and Born, E. W.},
title = {Line-transect estimation of abundance of narwhals (\textit{Monodon monoceros}) in {Scoresby Sund} and adjacent waters},
journal = {Meddr Grønland, Bioscience},
year = {1994},
volume = {39},
pages = {87--91}
}
|
|||||
| LaRue, M. A., Nielsen, C. K. & Grun, M. D. | 2007 | Using distance sampling to estimate densities of white-tailed deer in south-central Minnesota [BibTeX] |
The Prairie Naturalist 39:39--52 | ||
BibTeX:
@article{LaRue2007,
author = {LaRue, M. A. and C. K. Nielsen and M. D. Grun},
title = {Using distance sampling to estimate densities of white-tailed deer in south-central {M}innesota},
journal = {The Prairie Naturalist},
year = {2007},
volume = {39},
pages = {39--52}
}
|
|||||
| Lauerman, L. M. L., Kaufmann, R. S. & Smith, K. L. | 1996 | Distribution and abundance of epibenthic megafauna at a long time-series station in the abyssal northeast Pacific [BibTeX] |
Deep Sea Research I 43:1075--1103 | ||
BibTeX:
@article{Lauetal,
author = {Lauerman, L. M. L. and Kaufmann, R. S. and Smith, K. L.},
title = {Distribution and abundance of epibenthic megafauna at a long time-series station in the abyssal northeast {P}acific},
journal = {Deep Sea Research I},
year = {1996},
volume = {43},
pages = {1075--1103}
}
|
|||||
| Lauth, R., Ianelli, J. & Wakefield, W. | 2004 | Estimating the size selectivity and catching efficiency of a survey bottom trawl for thornyheads, Sebastolobus spp., using a towed video camera sled [BibTeX] |
Fisheries Research 70:27-37 | ||
BibTeX:
@article{Lauth2004,
author = {Lauth, R.R. and J. Ianelli and W.W. Wakefield},
title = {Estimating the size selectivity and catching efficiency of a survey bottom trawl for thornyheads, \textit{Sebastolobus} spp., using a towed video camera sled},
journal = {Fisheries Research},
year = {2004},
volume = {70},
pages = {27-37}
}
|
|||||
| Lauth, R., Wakefield, W. & Smith., K. | 2004 | Estimating the density of thornyheads, Sebastolobus spp., using a towed video camera sled [BibTeX] |
Fisheries Research 70:39-48 | ||
BibTeX:
@article{Lauth2004a,
author = {Lauth, R.R. and W.W. Wakefield and K. Smith.},
title = {Estimating the density of thornyheads, \textit{Sebastolobus} spp., using a towed video camera sled},
journal = {Fisheries Research},
year = {2004},
volume = {70},
pages = {39-48}
}
|
|||||
| Lawton, K., Robertson, G., Kirkwood, R., Valencia, J., Schlatter, R. & Smith, D. | 2006 | An estimate of population sizes of burrowing seabirds at the Diego Ramirez archipelago, Chile, using distance sampling and burrow-scoping | Polar Biology 29:229--238 | ||
| Abstract: The Diego Ramirez Islands lie 60 nautical miles southwest of Cape Horn and are the breeding site for three species of burrowing seabirds: blue petrels (Halobaena caerulea), common diving petrels (Pelecanoides urinatrix) and sooty shearwater (Puffinus griseus). Burrowing seabirds are highly vulnerable to predation by introduced vertebrate pests, and Diego Ramirez is an important breeding site because it is one of a few remaining subantarctic island groups with no introduced predators. Diego Ramirez is the only known breeding site for blue petrels in the southeast Pacific region, holding about 80% of the global population of that species, and with a population ten times larger than any other population in the world. We estimated the population size in 2002, using a novel application of the distance sampling technique to determine burrow density, and a burrow-scope with excavations to determine occupying species. We found that density was correlated with slope angle and soil wetness. Burrow densities in flatter terrain with drier soils were 2.03 burrows/m2 (95% confidence intervals: 1.82-2.27) and 1.11 burrows/m2 (0.84-1.48) in steeper terrain with wetter soils. The occupation rate of burrows were significantly different between habitat types (t = 2.74, d.f. 11, P < 0.05); in flatter drier habitats the proportion of burrows that led to a nest was 0.85 (0.74-0.96), in steeper wetter habitats this decreased to 0.64 (0.50-0.78). We used a digital elevation model to calculate true area rather than planar area for the two habitat types on the main island of Bartolome, and charts to calculate planar area for the remainder of the archipelago. There were 1.35 (1.15-1.54) million pairs of blue petrels and 99,000 (65,000-134,000) pairs of common diving petrels on the archipelago. These are similar figures to those from the only previous estimate, made in 1980. We found breeding sooty shearwaters for the first time, and estimated a population of several thousand pairs. We emphasise the facility of distance sampling as an unbiased technique with practical advantages over commonly used area search methods for monitoring populations of burrowing seabirds. These advantages include increased survey efficiency allowing a larger sample size for a given effort and a correspondingly tighter estimation of density. © Springer-Verlag 2005. | |||||
BibTeX:
@article{Lawton2006,
author = {Lawton, K. and Robertson, G. and Kirkwood, R. and Valencia, J. and Schlatter, R. and Smith, D.},
title = {An estimate of population sizes of burrowing seabirds at the Diego Ramirez archipelago, Chile, using distance sampling and burrow-scoping},
journal = {Polar Biology},
year = {2006},
volume = {29},
number = {3},
pages = {229--238}
}
|
|||||
| Leaper, R., Gillespie, D. & Papastavrou, V. | 2000 | Results of passive acoustic surveys for odontocetes in the Southern Ocean [BibTeX] |
Journal of Cetacean Research and Management 2:187--196 | ||
BibTeX:
@article{Leaper2000,
author = {Russell Leaper and D Gillespie and Vassili Papastavrou},
title = {Results of passive acoustic surveys for odontocetes in the Southern Ocean},
journal = {Journal of Cetacean Research and Management},
year = {2000},
volume = {2},
pages = {187--196}
}
|
|||||
| Leatherwood, S., Gilbert, J. R. & Chapman, D. G. | 1978 | An evaluation of some techniques for aerial censuses of bottlenosed dolphins [BibTeX] |
Journal of Wildife Management 42:239--250 | ||
BibTeX:
@article{Leaetal78,
author = {Leatherwood, S. and Gilbert, J. R. and Chapman, D. G.},
title = {An evaluation of some techniques for aerial censuses of bottlenosed dolphins},
journal = {Journal of Wildife Management},
year = {1978},
volume = {42},
pages = {239--250}
}
|
|||||
| Leatherwood, S. & Show, I. T., J. | 1982 | Effects of varying altitude on aerial surveys of bottlenose dolphins [BibTeX] |
Report of the International Whaling Commission 32:569--575 | ||
BibTeX:
@article{LeaSho82,
author = {Leatherwood, S. and Show, I. T., Jr},
title = {Effects of varying altitude on aerial surveys of bottlenose dolphins},
journal = {Report of the International Whaling Commission},
year = {1982},
volume = {32},
pages = {569--575}
}
|
|||||
| Leatherwood, S., Show, I. T., J., Reeves, R. R. & Wright, M. B. | 1982 | Proposed modification of transect models to estimate population size from aircraft with obstructed downward visibility [BibTeX] |
Report of the International Whaling Commission 32:577--579 | ||
BibTeX:
@article{Leaetal82,
author = {Leatherwood, S. and Show, I. T., Jr and Reeves, R. R. and Wright, M. B.},
title = {Proposed modification of transect models to estimate population size from aircraft with obstructed downward visibility},
journal = {Report of the International Whaling Commission},
year = {1982},
volume = {32},
pages = {577--579}
}
|
|||||
| Lee, D. C. & Marsden, S. J. | 2008 | Adjusting count period strategies to improve the accuracy of forest bird abundance estimates from point transect distance sampling surveys | Ibis 150:315-325 | DOI URL PDF | |
| Abstract: Although point transect distance sampling methods have become widely used in surveys of forest birds, there has been no attempt to tailor field methods to maximize the accuracy of abundance estimates by minimizing the effects of violations of the method's critical assumptions, which are: (1) birds at distance 0 m are detected with certainty, (2) birds are detected at their initial location and (3) distances to objects are measured accurately. We investigate the effects on abundance estimates for Philippine forest birds of varying the count period from 2 to 10 min, and of including and excluding a pre-count settling down period. Encounter rates were highly sensitive to count period length but density estimates from 10-min count periods were, on average, only 13% higher than those from 2-min periods, and in several cases were actually lower than those from periods of 6-8 min. This was because birds tended to be recorded at greater distances from the recorder as the count period went on, thus ‘stretching out’ detection functions while having little effect on detection rates close to the recorder. For some bird groups, including canopy frugivores and upperstorey gleaning insectivores, density estimates were more than twice as high without than with a settling down period. We suggest that movement away from the recorder is more common than attraction to the recorder, and that unless pilot studies show otherwise, similar studies should not use a settling down period for surveying many species. Count periods that maximized probability of bird detection close to the central point while minimizing the unwanted effects of bird movement during the count period were: 4 min for omnivores, 6 min for nectarivores and upperstorey gleaning insectivores, 8 min for understorey insectivores and canopy frugivores, and a full 10 min for sallying insectivores, ground-dwellers, carnivores and coucals/koels. We use the results to suggest ‘group-specific’ count period regimes that could help maximize the accuracy of density estimates from similar studies of tropical forest birds. | |||||
BibTeX:
@article{LEE2008,
author = {Lee,David C. and Marsden,Stuart J.},
title = {Adjusting count period strategies to improve the accuracy of forest bird abundance estimates from point transect distance sampling surveys},
journal = {Ibis},
year = {2008},
volume = {150},
pages = {315-325},
url = {http://www.blackwell-synergy.com/doi/abs/10.1111/j.1474-919X.2007.00790.x},
doi = {10.1111/j.1474-919X.2007.00790.x}
}
|
|||||
| Lehmkuhl, J. F., Burger, E. D., Drewc, E. K., Lindsey, J. P., Haggard, M. & Woodruff, K. Z. | 2007 | Breeding Birds in Riparian and Upland Dry Forests of the Cascade Range [BibTeX] |
Journal of Wildlife Management 71:2632--2643 | ||
BibTeX:
@article{Lehmkuhla2007,
author = {John F. Lehmkuhl and E. Dorsey Burger and Emily K. Drewc and John P. Lindsey and Maryellen Haggard and Kent Z. Woodruff},
title = {Breeding Birds in Riparian and Upland Dry Forests of the Cascade Range},
journal = {Journal of Wildlife Management},
year = {2007},
volume = {71},
pages = {2632--2643}
}
|
|||||
| Lehouck, V., Spanhove, T., Vangestel, C., Cordeiro, N. & Lens, L. | 2009 | Does landscape structure affect resource tracking by avian frugivores in a fragmented Afrotropical forest? [BibTeX] |
Ecography 32:789-799 | URL | |
BibTeX:
@article{Lehouck2009789,
author = {Lehouck, V. and Spanhove, T. and Vangestel, C. and Cordeiro, N.J. and Lens, L.},
title = {Does landscape structure affect resource tracking by avian frugivores in a fragmented Afrotropical forest?},
journal = {Ecography},
year = {2009},
volume = {32},
number = {5},
pages = {789-799},
note = {cited By (since 1996) 0},
url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-70349675645&partnerID=40&md5=3b13a6a8a11e20d5f47f833a60e91b82}
}
|
|||||
| Lennert-Cody, C. E., Buckland, S. T. & Marques, F. F. C. | 2001 | Trends in dolphin abundance estimated from fisheries data: a cautionary note [BibTeX] |
Journal of Cetacean Research and Management 3:305--319 | ||
BibTeX:
@article{Lennert-Cody2001,
author = {Lennert-Cody, C E and Buckland, S T and Marques, F F C},
title = {Trends in dolphin abundance estimated from fisheries data: a cautionary note},
journal = {Journal of Cetacean Research and Management},
year = {2001},
volume = {3},
pages = {305--319}
}
|
|||||
| Leopold, M. F., vanderWerf, B., Ries, E. H. & Reijnders, P. J. H. | 1997 | The importance of the North Sea for winter dispersal of harbour seals Phoca vitulinafrom the Wadden Sea [BibTeX] |
Biological Conservation 81:97--102 | ||
BibTeX:
@article{Leo97,
author = {Leopold, M. F. and vanderWerf, B. and Ries, E. H. and Reijnders, P. J. H.},
title = {The importance of the {N}orth {S}ea for winter dispersal of harbour seals \em {P}hoca vitulina\em from the {W}adden {S}ea},
journal = {Biological Conservation},
year = {1997},
volume = {81},
pages = {97--102}
}
|
|||||
| Lerczak, J. A. & Hobbs, R. C. | 1998 | Calculating sighting distances from angle readings during ship-board, aerial and shore-based marine mammal surveys [BibTeX] |
Marine Mammal Science 14:590--598 | ||
BibTeX:
@article{LerHob98,
author = {Lerczak, J. A. and Hobbs, R. C.},
title = {Calculating sighting distances from angle readings during ship-board, aerial and shore-based marine mammal surveys},
journal = {Marine Mammal Science},
year = {1998},
volume = {14},
pages = {590--598}
}
|
|||||
| LeResche, R. E. & Rausch, R. A. | 1974 | Accuracy and precision of aerial moose censusing [BibTeX] |
Journal of Wildlife Management 38:175--182 | ||
BibTeX:
@article{LerRau74,
author = {LeResche, R. E. and Rausch, R. A.},
title = {Accuracy and precision of aerial moose censusing},
journal = {Journal of Wildlife Management},
year = {1974},
volume = {38},
pages = {175--182}
}
|
|||||
| Lescrauwaet, A.-C., Gibbons, J., Guzman, L. & Schiavini, A. | 2000 | Abundance estimation of Commerson's dolphin in the eastern area of the Strait of Magallan-Chile [BibTeX] |
Revista Chilena de Historia Natural 73:473-478 | ||
BibTeX:
@article{Lescrauwaet2000,
author = {Lescrauwaet, Anne-Catherine and Gibbons, Jorge and Guzman, Leonardo and Schiavini, A.},
title = {Abundance estimation of Commerson's dolphin in the eastern area of the Strait of Magallan-Chile},
journal = {Revista Chilena de Historia Natural},
year = {2000},
volume = {73},
pages = {473-478}
}
|
|||||
| Lessard, V., Drummer, T. & Reed, D. | 2002 | Precision of density estimates from fixed-radius plots compared to n-tree distance sampling | Forest Science 48:1--6 | ||
| Abstract: We computed and compared the statistical properties of the estimators for the number of trees/ha (density) for fixed-radius plot and n-tree distance sampling. In forests with random spatial patterns, n-tree distance sampling density estimators are at least as precise as those of plot sampling if the fixed-radius plot size is less than the ratio of (n - 2) and the expected density, where n is the number of trees included at an n-tree location. A similar result holds for the clustered forest, where the ratio is multiplied by a factor involving a constant of heterogeneity. If the expected number of trees per plot and the plot sizes are the same for both the random and clustered spatial patterns, the variance of the plot sampling density estimator for the clustered pattern will always be greater than for that of the random spatial pattern. | |||||
BibTeX:
@article{Lessard2002,
author = {Lessard, V.C. and Drummer, T.D. and Reed, D.D.},
title = {Precision of density estimates from fixed-radius plots compared to n-tree distance sampling},
journal = {Forest Science},
year = {2002},
volume = {48},
number = {1},
pages = {1--6}
}
|
|||||
| Leuteritz, T., Lamb, T. & Limberaza, J. | 2005 | Distribution, status, and conservation of radiated tortoises (Geochelone radiata) in Madagascar [BibTeX] |
Biological Conservation 124:451--461 | ||
BibTeX:
@article{Leuteritz2005,
author = {Leuteritz, T.E.J. and Lamb, T. and Limberaza, J.C.},
title = {Distribution, status, and conservation of radiated tortoises (Geochelone radiata) in Madagascar},
journal = {Biological Conservation},
year = {2005},
volume = {124},
number = {4},
pages = {451--461}
}
|
|||||
| Lewis, T., Gillespie, D., Lacey, C., Matthews, J., Danbolt, M., Leaper, R., McLanaghan, R. & Moscrop, A. | 2007 | Sperm whale abundance estimates from acoustic surveys of the Ionian Sea and Straits of Sicily in 2003 [BibTeX] |
Journal of the Marine Biological Association of the United Kingdom 87:353--357 | ||
| Review: This is "standard" distance sampling but where distances are gathered by accoustics rather than visual detectors. | |||||
BibTeX:
@article{Lewis,
author = {T. Lewis and D. Gillespie and C. Lacey and J. Matthews and M. Danbolt and R. Leaper and R. McLanaghan and A. Moscrop},
title = {Sperm whale abundance estimates from acoustic {surveys of the Ionian Sea and Straits of Sicily in 2003}},
journal = {Journal of the Marine Biological Association of the United Kingdom},
year = {2007},
volume = {87},
pages = {353--357}
}
|
|||||
| Link, W. A. & Barker, R. J. | 1994 | Density estimation using the trapping web design --- a geometric analysis [BibTeX] |
Biometrics 50:733--745 | ||
BibTeX:
@article{LinBar94,
author = {Link, W. A. and Barker, R. J.},
title = {Density estimation using the trapping web design --- a geometric analysis},
journal = {Biometrics},
year = {1994},
volume = {50},
pages = {733--745}
}
|
|||||
| Link, W. A. & Sauer, J. R. | 1997 | Estimation of population trajectories from count data [BibTeX] |
Biometrics 53:488--497 | ||
BibTeX:
@article{LinSau97,
author = {Link, W. A. and Sauer, J. R.},
title = {Estimation of population trajectories from count data},
journal = {Biometrics},
year = {1997},
volume = {53},
pages = {488--497}
}
|
|||||
| Linklater, W. L., Cameron, E. Z., Stafford, K. J. & Minot, E. O. | 2001 | Estimating Kaimanawa feral horse population size and growth [BibTeX] |
: | ||
BibTeX:
@techreport{Linklater2001,
author = {Linklater, W. L. and Cameron, E. Z. and Stafford, K. J. and Minot, E. O.},
title = {Estimating Kaimanawa feral horse population size and growth},
year = {2001},
number = {185}
}
|
|||||
| Liu, Z., Wang, X., Teng, L., Cui, D. & Li, X. | 2008 | Estimating seasonal density of blue sheep (Pseudois nayaur) in the Helan Mountain region using distance sampling methods [BibTeX] |
Ecological Research 23:393--400 | ||
BibTeX:
@article{Liu2008,
author = {Liu, Z and Wang, X and Teng, L and Cui, D and Li, X},
title = {Estimating seasonal density of blue sheep (\textit{Pseudois nayaur}) in the {Helan Mountain} region using distance sampling methods},
journal = {Ecological Research},
year = {2008},
volume = {23},
pages = {393--400}
}
|
|||||
| Lloyd, H. | 2004 | Habitat and population estimates of some threatened lowland forest bird species in Tambopata, south-east Peru | Bird Conservation International 14:261--277 | ||
| Abstract: Surveys of threatened lowland forest bird species and forest habitats were conducted during a 21-month census of lowland bird communities in Tambopata, Department of Madre de Dios, south-east Peru. A combination of distance sampling census methods and direct counts was used for the census in five sites located along the Rio Madre de Dios and Rio Tambopata. All five sites consisted of different forest types with significantly different habitat components. Three of these sites were classified as primary forest habitats whilst the remaining two were classified as disturbed forests. Population densities were calculated for eight of the threatened species recorded during the census. Density estimates of non-bamboo specialists were higher in primary forest habitats than in disturbed forest habitats. Density estimates of most bamboo specialists were higher in primary Old Floodplain forest with extensive bamboo understorey than in primary Middle/Upper Floodplain forest with smaller, patchy areas of bamboo understorey. Calculation of regional population estimates based on the amount of forest cover from satellite photographs shows that only two of the threatened bird species have substantial populations currently protected by the Parque Nacional Bahuaja-Sonene and Reservada Nacional de Tambopata. Selective logging operations that reduce overall tree biomass and remove a large proportion of palm tree species from primary forest habitats will have an adverse affect on local populations of four of the threatened bird species in the region. © BirdLife International 2004. | |||||
BibTeX:
@article{Lloyd2004,
author = {Lloyd, H.},
title = {Habitat and population estimates of some threatened lowland forest bird species in Tambopata, south-east Peru},
journal = {Bird Conservation International},
year = {2004},
volume = {14},
number = {4},
pages = {261--277}
}
|
|||||
| Lloyd, H. | 2003 | Population densities of some nocturnal raptor species (Strigidae) in southeastern Peru | Journal of Field Ornithology 74:376--380 | ||
| Abstract: Line transects based on distance sampling methodology were used to census nocturnal raptor species in three different primary lowland forest habitats in the Tambopata region, southeastren Peru. Density estimates were calculated for five owl species in these forest habitats. In general, species were more abundant in primary old floodplain or primary middle/upper floodplain forests than in primary seasonally flooded swamp forest. Density estimates were also higher than those calculated from traditional spot-mapping methods in other lowland forest sites in southeastern Peru and French Guiana. There was no significant difference in the number of individual owls recorded during nights with different cloud cover or during different phases of the moon. Problems of distance estimation at night and unfamiliarity with a range of vocalizations, particularly with Strix owls, may be overcome by conducting a practice period before surveys are undertaken, with transect routes and distance markers adequately set out. Walking transect routes during daylight hours in a practice period also helps to overcome concerns of observer safety. | |||||
BibTeX:
@article{Lloyd2003,
author = {Lloyd, H.},
title = {Population densities of some nocturnal raptor species (Strigidae) in southeastern Peru},
journal = {Journal of Field Ornithology},
year = {2003},
volume = {74},
number = {4},
pages = {376--380}
}
|
|||||
| Lochmiller, R. L., Boggs, J. F., McMurry, S. T., Leslie, D. M. & Engle, D. M. | 1991 | Response of cottontail rabbit populations to herbicide and fire applications on Cross Timbers rangeland [BibTeX] |
Journal of Range Management 44:150--155 | ||
BibTeX:
@article{Locetal,
author = {Lochmiller, R. L. and Boggs, J. F. and McMurry, S. T. and Leslie, D. M. and Engle, D. M.},
title = {Response of cottontail rabbit populations to herbicide and fire applications on {C}ross {T}imbers rangeland},
journal = {Journal of Range Management},
year = {1991},
volume = {44},
pages = {150--155}
}
|
|||||
| Low, M., Meyer, L. & Southwell, C. | 2008 | Experimental evaluation of a new ground-based survey method for estimating the density and abundance of nesting Adélie penguins Pygoscelis adeliae [BibTeX] |
Polar Biology 31:309--315 | ||
BibTeX:
@article{Low2008,
author = {Matthew Low and Lisa Meyer and Colin Southwell},
title = {Experimental evaluation of a new ground-based survey method for estimating the density and abundance of nesting {A}d\'{e}lie penguins \textit{Pygoscelis adeliae}},
journal = {Polar Biology},
year = {2008},
volume = {31},
pages = {309--315}
}
|
|||||
| Lueders, A., Kennedy, P. & Johnson, D. | 2006 | Influences of management regimens on breeding bird densities and habitat in mixed-grass prairie: An Example from North Dakota [BibTeX] |
Journal of Wildlife Management 70:600--606 | ||
BibTeX:
@article{Lueders2006,
author = {Lueders, A.S. and Kennedy, P.L. and Johnson, D.H.},
title = {Influences of management regimens on breeding bird densities and habitat in mixed-grass prairie: An Example from North Dakota},
journal = {Journal of Wildlife Management},
year = {2006},
volume = {70},
number = {2},
pages = {600--606}
}
|
|||||
| Luiselli, L. | 2006 | Site occupancy and density of sympatric Gaboon viper (Bitis gabonica) and nose-horned viper (Bitis nasicornis) | Journal of Tropical Ecology 22:555--564 | ||
| Abstract: The presence and density of two sympatric, large-sized vipers (the Gaboon viper, Bitis gabonica and the nose-horned viper, Bitis nasicornis) were studied along several transects, during both dry and wet seasons, and at different times of day, in southern Nigeria (West Africa). Three habitat types were found along the various transects (mature rain forest (MF), secondary rain forest (SF), swamp forest (SW)). The detection probabilities for these vipers were modelled with a set of competing models, and the various models were ordered by Akaike Information Criterion procedures. Two classes of models were used: the single-season model, and the multi-species model. The best models (single-season model) suggested that: for the Gaboon viper, habitat types SF and SW were particularly important in detecting this species, especially during the rainy season at 08h00-16h00. For nose-horned vipers, the best models had SW and MF as site-covariates. Application of the multi-species model revealed that there were different detection functions if both species are present at a site, with a 'negative' interaction of occupancy between the species. Females and males were similarly detectable in a logistic regression model, but feeding status and pregnancy slightly increased detection probability in a logistic regression model. Viper density was modelled by a DISTANCE sampling procedure. The density of one species tended to be inversely correlated to the density of the other, suggesting that (1) the rain-forest environment does not support abundant populations of both vipers when sympatric, and (2) the two Bitis species subtly partition the habitat resources. Copyright © 2006 Cambridge University Press. | |||||
BibTeX:
@article{Luiselli2006,
author = {Luiselli, L.},
title = {Site occupancy and density of sympatric Gaboon viper \textit{(Bitis gabonica)} and nose-horned viper \textit{(Bitis nasicornis)}},
journal = {Journal of Tropical Ecology},
year = {2006},
volume = {22},
number = {5},
pages = {555--564}
}
|
|||||
| Lukacs, P., Kissling, M., Reid, M., Gende, S. & Lewis, S. | 2010 | Testing assumptions of distance sampling on a pelagic seabird [BibTeX] |
The Condor 112:455-459 | ||
BibTeX:
@article{Lukacs2010,
author = {Lukacs, P.M. and Kissling, M.L. and Reid, M and Gende, S.M. and Lewis, S.B.},
title = {Testing assumptions of distance sampling on a pelagic seabird},
journal = {The Condor},
year = {2010},
volume = {112},
pages = {455-459}
}
|
|||||
| Lukacs, P. M. | 2002 | WebSim: simulation software to assist in trapping web design [BibTeX] |
Wildlife Society Bulletin 30:1259--1261 | ||
BibTeX:
@article{Luk02,
author = {Lukacs, P. M.},
title = {WebSim: simulation software to assist in trapping web design},
journal = {Wildlife Society Bulletin},
year = {2002},
volume = {30},
pages = {1259--1261}
}
|
|||||
| Lukacs, P. M. | 2001 | Estimating Density of Animal Populations using Trapping Webs: Evaluation of Web Design and Data Analysis [BibTeX] |
: | ||
BibTeX:
@mastersthesis{Luk01,
author = {Lukacs, P. M.},
title = {Estimating Density of Animal Populations using Trapping Webs: Evaluation of Web Design and Data Analysis},
school = {Colorado State University},
year = {2001}
}
|
|||||
| Lusk, M., Hess, S., Reynolds, M. & Johnston, S. | 2000 | Population status of the Tinian Monarch (Monarcha takatsukasae) on Tinian, Commonwealth of the Northern Mariana Islands [BibTeX] |
Micronesica 32:181--190 | ||
BibTeX:
@article{Lusk2000,
author = {Lusk, M and Hess, S and Reynolds, M and Johnston, S},
title = {Population status of the Tinian Monarch (\textit{Monarcha takatsukasae}) on Tinian, Commonwealth of the Northern Mariana Islands},
journal = {Micronesica},
year = {2000},
volume = {32},
number = {2},
pages = {181--190}
}
|
|||||
| Lynch, T. B. & Rusydi, R. | 1999 | Distance sampling for forest inventory in Indonesian teak plantations | Forest Ecology and Management 113:215--221 | ||
| Abstract: Distance sampling techniques were compared to point (variable plot) sampling and fixed-radius circular plot sampling for inventory of teak (Tectona grandis) plantations in Indonesia. n-tree distance sampling selects the n trees closest to a sample point located in the field. The distance to the nth closest tree is used as a plot radius. Two n-tree estimators were compared. Prodan (1968) described a technique for n=6, which counts the nth tree as 1/2 for tree counts and tree volume (or other tree attributes). Another approach, here called 'the (n-1)/n adjusted estimator' uses the bias correction factor (n-1)/n. Eberhardt (1967) demonstrated that the (n-1)/n adjusted estimator is unbiased for Poisson (random) and negative binomial (clumped) spatial distributions. No proof of unbiasedness is known for either method in uniform distributions which would be characteristics of plantations. n-tree sampling was performed in Indonesian teak plantations for values of n ranging from 3 to 10 for both methods. At the same locations, point (variable plot) samples with metric basal area factors 1 m2 ha-1 tree-1 and 2 m2 ha-1 tree-1 and fixed-radius circular plots 0.1 ha in size were installed for comparison with the n-tree distance methods. The time required for each sampling method was recorded at each field location. For each method, an efficiency ratio was calculated as (C(k)/2 x Time(k))/(C(0.1 ha)/2 x Time(0.1 ha)) where C(k) is the coefficient of variation for method k, Time(k) is the average time required for method k, C(0.1 ha) is the coefficient of variation for 0.1 ha plots and Time(0.1 ha) is the average time required for 0.1 ha plots. The more efficient methods have smaller efficiency ratios. According to this criterion, 5-tree distance sampling using Prodan's estimator was most efficient of the techniques compared that did not show bias for these data. The (n-1)/n adjusted estimator showed bias for these trials in teak plantations. This was probably due to the uniform spatial distribution characteristics of plantations. Point sampling with BAF=1 m2 ha-1 tree-1 and BAF=2 m2 ha-1 tree-1 and 0.1 ha plot sampling were not as efficient as n-tree sampling methods for these trials. | |||||
BibTeX:
@article{Lynch1999,
author = {Lynch, T. B. and Rusydi, R.},
title = {Distance sampling for forest inventory in Indonesian teak plantations},
journal = {Forest Ecology and Management},
year = {1999},
volume = {113},
number = {2-3},
pages = {215--221}
}
|
|||||
| Mack, Y. & Quang, P. X. | 1998 | Kernel methods in line and point transect sampling [BibTeX] |
Biometrics 54:606--619 | ||
BibTeX:
@article{MAC&QUA98,
author = {Mack, Y. and Quang,P. X.},
title = {Kernel methods in line and point transect sampling},
journal = {Biometrics},
year = {1998},
volume = {54},
pages = {606--619}
}
|
|||||
| Mack, Y. P. | 1998 | Testing for the shoulder condition in transect sampling [BibTeX] |
Communications in Statistics --- Theory and Methods 27:423--432 | ||
BibTeX:
@article{Mac98,
author = {Mack, Y. P.},
title = {Testing for the shoulder condition in transect sampling},
journal = {Communications in Statistics --- Theory and Methods},
year = {1998},
volume = {27},
pages = {423--432}
}
|
|||||
| Mack, Y. P., Quang, P. X. & Zhang, S. | 1999 | Kernel estimation in transect sampling without the shoulder condition [BibTeX] |
Communications in Statistics --- Theory and Methods 28:2277--2296 | ||
BibTeX:
@article{Macetal99,
author = {Mack, Y. P. and Quang, P. X. and Zhang, S.},
title = {Kernel estimation in transect sampling without the shoulder condition},
journal = {Communications in Statistics --- Theory and Methods},
year = {1999},
volume = {28},
pages = {2277--2296}
}
|
|||||
| Mackintosh, N. A. & Brown, S. G. | 1956 | Estimates of the southern population of the larger baleen whales [BibTeX] |
The Norwegian Gazette 45:469 | ||
BibTeX:
@article{MAcBro56,
author = {Mackintosh, N. A. and Brown, S. G.},
title = {Estimates of the southern population of the larger baleen whales},
journal = {The Norwegian Gazette},
year = {1956},
volume = {45},
pages = {469}
}
|
|||||
| Macleod, K. | 2004 | Abundance of Atlantic white-sided dolphin (Lagenorhynchus acutus) during summer off northwest Scotland | Journal of Cetacean Research and Management 6:33--40 | ||
| Abstract: A shipboard cetacean survey was conducted in July/August 1998 within an area to the west of Scotland, UK, commonly known as the Atlantic Frontier. The aim of the survey was to document the distribution and abundance of cetaceans to provide baseline population data for an area that is being increasingly explored and developed by oil companies. A double platform ‘independent observer’ (IO) method was used to estimate the abundance of the Atlantic white-sided dolphin (Lagenorhynchus acutus) using standard line-transect and distance sampling methodology. Previously, uncorrected Atlantic white-sided dolphin abundance was estimated as 27,194 (CV = 0.29) from this survey. This paper presents abundance estimates corrected for g(0) < 1 using a direct duplicate method. The value of g(0) was estimated to be 0.61 (CV = 0.09). The abundance in two strata was estimated as 21,371 (CV = 0.54) to the west of the Outer Hebrides and74,626 (CV = 0.72) in the Faroe Shetland Channel. The high CVs are the result of small sample sizes, particularly of the duplicate data set. However, the abundance estimates represent the first for this species to the northwest of Scotland and adds to existing baseline abundance estimates for small cetaceans in UK waters. The results could be useful for planning future surveys that aim to calculate more precise abundance estimates. These results, together with opportunistic sightings data collected during other surveys, suggest that the waters to the west of Scotland are an important habitat for the Atlantic white-sided dolphin. Presently, threats to this species in the area are relatively unknown but a baseline population estimate will be an integral part of any management regime should there become a need in future. | |||||
BibTeX:
@article{Macleod2004,
author = {Macleod, K.},
title = {Abundance of Atlantic white-sided dolphin (\textit{Lagenorhynchus acutus}) during summer off northwest Scotland},
journal = {Journal of Cetacean Research and Management},
year = {2004},
volume = {6},
pages = {33--40}
}
|
|||||
| Macleod, K., Simmonds, M. & Murray, E. | 2006 | Abundance of fin (Balaenoptera physalus) and sei whales (B. borealis) amid oil exploration and development off northwest Scotland [BibTeX] |
Journal of Cetacean Research and Management 8:247--254 | ||
| Review: A ship-based line transect survey was conducted during July-August 1998 to assess the distribution and abundance of cetaceans off northwest Scotland. Limited information from dedicated surveys exists for this area and the lack of baseline data is cause for concern given the expanding oil industry in these waters. Historical whaling records show that large numbers of baleen whales, particularly fin and sei whales, were captured in these waters during summer. The waters surveyed included former whaling grounds and currently licensed oil blocks to the west of the Outer Hebrides and the Faroe-Shetland Channel and both fin and sei whales were encountered. Neither species was recorded to the west of the Outer Hebrides whereas relatively high densities of both were recorded further north in the Faroe-Shetland Channel. The density of fin and sei whales was 0.021km–2 and 0.022km–2, respectively. Abundance was estimated as 933 (CV=0.38) fin whales, 1,011 (CV=0.35) sei whales and 1,923 (CV=0.33) ‘large whales’. The high density of whales recorded in the Faroe-Shetland Channel supports the idea that it is an important summer feeding ground for both species and the potential for acoustic disturbance associated with increasing industrialisation of this area is a concern. Factors affecting the distribution and abundance of these whales are discussed |
|||||
BibTeX:
@article{Macleod2006,
author = {Macleod, K. and Simmonds, M.P. and Murray, E.},
title = {Abundance of fin (\textit{Balaenoptera physalus}) and sei whales (\textit{B. borealis}) amid oil exploration and development off northwest {S}cotland},
journal = {Journal of Cetacean Research and Management},
year = {2006},
volume = {8},
pages = {247--254}
}
|
|||||
| MacRae, P. & Jackson, D. | 2006 | Characterizing north temperate lake littoral fish assemblages: A comparison between distance sampling and minnow traps | Canadian Journal of Fisheries and Aquatic Sciences 63:558--568 | ||
| Abstract: To determine which sampling method may be best employed to monitor changes in fish species composition in littoral areas of small north temperate lakes (50 ha), data were collected using distance sampling, based on the line transect method, and a traditional fish sampling method of baited minnow traps. These methods were independently biased in terms of their estimates of species presence and abundance. However, analyses of fish community structure indicated that minnow trap data alone provided a better measure of community structure than did distance sampling data alone. Distance sampling, although a powerful tool in estimating population density, is hindered by a multitude of environmental variables that do not preclude the use of minnow traps. Lakes with clear water containing few species with abundant individuals are best suited for distance sampling. Minnow traps proved to be a fast, efficacious sampling method capable of fairly accurately defining the littoral small-fish community structure in most lakes sampled. These traps are a reliable method for monitoring presence or absence and relative abundance of small-bodied fish species in north temperate lakes. However, the combination of minnow traps and some form of visual sampling will help to ensure that all species are detected in small north temperate lakes. © 2006 NRC. | |||||
BibTeX:
@article{MacRae2006,
author = {MacRae, P.S.D. and Jackson, D.A.},
title = {Characterizing north temperate lake littoral fish assemblages: A comparison between distance sampling and minnow traps},
journal = {Canadian Journal of Fisheries and Aquatic Sciences},
year = {2006},
volume = {63},
number = {3},
pages = {558--568}
}
|
|||||
| Madhusudan, M. D. & Karanth, K. U. | 2000 | Hunting for an answer: is local hunting compatible with large mammal conservation in India? [BibTeX] |
Hunting for Sustainability in Tropical Forests :339-354 | ||
BibTeX:
@incollection{Madhusudan2000,
author = {Madhusudan, M. D. and Karanth, K. U.},
title = {Hunting for an answer: is local hunting compatible with large mammal conservation in India?},
booktitle = {Hunting for Sustainability in Tropical Forests},
publisher = {Columbia University Press},
year = {2000},
pages = {339-354}
}
|
|||||
| Magige, F. J., Holmern, T., Stokke, S., Mlingwa, C. & Røskaft, E. | 2009 | Does illegal hunting affect density and behaviour of African grassland birds? A case study on ostrich (Struthio camelus) [BibTeX] |
Biodiversity and Conservation 18:1361-1373 | ||
BibTeX:
@article{Magige2008,
author = {Flora John Magige and Tomas Holmern and Sigbjørn Stokke and Charles Mlingwa and Eivin Røskaft},
title = {Does illegal hunting affect density and behaviour of African grassland birds? A case study on ostrich (\textit{Struthio camelus})},
journal = {Biodiversity and Conservation},
year = {2009},
volume = {18},
pages = {1361-1373}
}
|
|||||
| Magoulick, D. | 2004 | Effects of predation risk on habitat selection by water column fish, benthic fish and crayfish in stream pools [BibTeX] |
Hydrobiologia 527:209--221 | ||
BibTeX:
@article{Magoulick2004,
author = {Magoulick, D.D.},
title = {Effects of predation risk on habitat selection by water column fish, benthic fish and crayfish in stream pools},
journal = {Hydrobiologia},
year = {2004},
volume = {527},
number = {1},
pages = {209--221}
}
|
|||||
| Maheshwari, A. | 2006 | Food Habits and Prey Abundance of Leopard (Panthera pardus fusca) in Gir National Park and Wildlife Sanctuary [BibTeX] |
: | ||
BibTeX:
@mastersthesis{Maheshwari2006,
author = {Maheshwari, A.},
title = {Food Habits and Prey Abundance of Leopard (\textit{Panthera pardus fusca}) in Gir National Park and Wildlife Sanctuary},
school = {Aligarh Muslim University},
year = {2006}
}
|
|||||
| Mandujano, S. & Gallina, S. | 1995 | Comparison of deer censusing methods in tropical dry forest [BibTeX] |
Wildlife Society Bulletin 23:180--186 | ||
BibTeX:
@article{ManGal95,
author = {Mandujano, S. and Gallina, S.},
title = {Comparison of deer censusing methods in tropical dry forest},
journal = {Wildlife Society Bulletin},
year = {1995},
volume = {23},
pages = {180--186}
}
|
|||||
| Manly, B. F. J. | 2002 | Estimating a resource selection function with line transect sampling | Journal of Applied Mathematics and Decision Sciences 6:213--228 | ||
| Abstract: A resource selection probability function is a function that gives the probability that a resource unit (e.g., a plot of land) that is described by a set of habitat variables X1 to Xp will be used by an animal or group of animals in a certain period of time. The estimation of a resource selection function is usually based on the comparison of a sample of resource units used by an animal with a sample of the resource units that were available for use, with both samples being assumed to be e.ectively randomly selected from the relevant populations. In this paper the possibility of using a modi.ed sampling scheme is examined, with the used units obtained by line transect sampling. A logistic regression type of model is proposed, with estimation by conditional maximum likelihood. A simulation study indicates that the model in its full generality may be di.cult to estimate with reasonable sample sizes, but that a simpler version may be a practical alternative. |
|||||
BibTeX:
@article{Manly2002,
author = {Manly, B. F. J.},
title = {Estimating a resource selection function with line transect sampling},
journal = {Journal of Applied Mathematics and Decision Sciences},
year = {2002},
volume = {6},
pages = {213--228}
}
|
|||||
| Manly, B. F. J. | 2001 | Study Design Considerations for Aerial Surveys in the Spring and Fall to Estimate the Abundance of Pacific Walrus [BibTeX] |
: | ||
BibTeX:
@techreport{Manly2001,
author = {Manly, B. F. J.},
title = {Study Design Considerations for Aerial Surveys in the Spring and Fall to Estimate the Abundance of Pacific Walrus},
year = {2001}
}
|
|||||
| Manly, B. F. J., McDonald, L. L. & Garner, G. W. | 1996 | Maximum likelihood estimation for the double-count method with independent observers [BibTeX] |
Journal of Agricultural, Biological, and Environmental Statistics 1:170--189 | ||
BibTeX:
@article{Manetal96,
author = {Manly, B. F. J and McDonald, L. L. and Garner, G. W.},
title = {Maximum likelihood estimation for the double-count method with independent observers},
journal = {Journal of Agricultural, Biological, and Environmental Statistics},
year = {1996},
volume = {1},
pages = {170--189}
}
|
|||||
| Mar, K. L. & Mcarthur, C. | 2005 | Comparison of habitat selection by two sympatric macropods, Thylogale billardierii and Macropus rufogriseus rufogriseus, in a patchy eucalypt-forestry environment [BibTeX] |
Austral Ecology 30:674--683 | ||
BibTeX:
@article{Mar2005,
author = {Kirsten Le Mar and Clare Mcarthur},
title = {Comparison of habitat selection by two sympatric macropods, \textit{Thylogale billardierii} and \textit{Macropus rufogriseus rufogriseus}, in a patchy eucalypt-forestry environment},
journal = {Austral Ecology},
year = {2005},
volume = {30},
pages = {674--683}
}
|
|||||
| Marcus Rowcliffe, J., Carbone, C., Jansen, P. A., Kays, R. & Kranstauber, B. | 2011 | Quantifying the sensitivity of camera traps: an adapted distance sampling approach [BibTeX] |
Methods in Ecology and Evolution 2:464--476 | DOI PDF | |
BibTeX:
@article{MEE3:MEE394,
author = {Marcus Rowcliffe, J. and Carbone, Chris and Jansen, Patrick A. and Kays, Roland and Kranstauber, Bart},
title = {Quantifying the sensitivity of camera traps: an adapted distance sampling approach},
journal = {Methods in Ecology and Evolution},
publisher = {Blackwell Publishing Ltd},
year = {2011},
volume = {2},
number = {5},
pages = {464--476},
doi = {10.1111/j.2041-210X.2011.00094.x}
}
|
|||||
| Marini, F., Franzetti, B., Calabrese, A., Cappellini, S. & Focardi, S. | 2009 | Response to human presence during nocturnal line transect surveys in fallow deer (Dama dama) and wild boar (Sus scrofa) [BibTeX] |
European Journal of Wildlife Research 56:233-237 | ||
BibTeX:
@article{Marini2008,
author = {Francesca Marini and Barbara Franzetti and Alessandro Calabrese and Sara Cappellini and Stefano Focardi},
title = {Response to human presence during nocturnal line transect surveys in fallow deer (\textit{Dama dama}) and wild boar (\textit{Sus scrofa})},
journal = {European Journal of Wildlife Research},
year = {2009},
volume = {56},
pages = {233-237}
}
|
|||||
| Marques, F. F. C. | 2001 | Estimating wildlife distribution and abundance from line transect surveys conducted from platforms of opportunity [BibTeX] |
: | ||
| Review: Changed on 15-11-2006 | |||||
BibTeX:
@phdthesis{FMAR01,
author = {Marques, F. F. C.},
title = {Estimating wildlife distribution and abundance from line transect surveys conducted from platforms of opportunity},
school = {University of St. Andrews},
year = {2001}
}
|
|||||
| Marques, F. F. C. & Buckland, S. T. | 2004 | Covariate models for the detection function [BibTeX] |
Advanced Distance Sampling :31-47 | ||
BibTeX:
@incollection{FMARBUC04,
author = {Marques, F. F. C. and Buckland, S. T.},
title = {Covariate models for the detection function},
booktitle = {Advanced Distance Sampling},
publisher = {Oxford University Press},
year = {2004},
pages = {31-47}
}
|
|||||
| Marques, F. F. C. & Buckland, S. T. | 2003 | Incorporating covariates into standard line transect analyses [BibTeX] |
Biometrics 59:924--935 | ||
BibTeX:
@article{FMARBUC03,
author = {Marques, F. F. C. and Buckland, S. T.},
title = {Incorporating covariates into standard line transect analyses},
journal = {Biometrics},
year = {2003},
volume = {59},
pages = {924--935}
}
|
|||||
| Marques, F. F. C., Buckland, S. T., Goffin, D., Dixon, C. E., Borchers, D. L., Mayle, B. A. & Peace, A. J. | 2001 | Estimating deer abundance from line transect surveys of dung: sika deer in southern Scotland [BibTeX] |
Journal of Applied Ecology 38:349--363 | ||
BibTeX:
@article{Maretal01,
author = {Marques, F. F. C. and Buckland, S. T. and Goffin, D. and Dixon, C. E. and Borchers, D. L. and Mayle, B. A. and Peace, A. J.},
title = {Estimating deer abundance from line transect surveys of dung: sika deer in southern {S}cotland},
journal = {Journal of Applied Ecology},
year = {2001},
volume = {38},
pages = {349--363}
}
|
|||||
| Marques, T. A. | 2009 | Distance sampling: estimating animal density [BibTeX] |
Significance 6:136--137 | ||
BibTeX:
@article{Marques2009h,
author = {Tiago A. Marques},
title = {Distance sampling: estimating animal density},
journal = {Significance},
year = {2009},
volume = {6},
pages = {136--137}
}
|
|||||
| Marques, T. A. | 2007 | Incorporating measurement error and density gradients in distance sampling surveys [BibTeX] |
: | ||
BibTeX:
@phdthesis{Marques2007,
author = {Marques, T. A.},
title = {Incorporating measurement error and density gradients in distance sampling surveys},
school = {University of St Andrews},
year = {2007}
}
|
|||||
| Marques, T. A. | 2004 | Predicting and correcting bias caused by measurement error in line transect sampling using multiplicative error models | Biometrics 60:757--763 | ||
| Abstract: Line transect sampling is one of the most widely used methods for animal abundance assessment. Standard estimation methods assume certain detection on the transect, no animal movement, and no measurement errors. Failure of the assumptions can cause substantial bias. In this work, the effect of error measurement on line transect estimators is investigated. Based on considerations of the process generating the errors, a multiplicative error model is presented and a simple way of correcting estimates based on knowledge of the error distribution is proposed. Using beta models for the error distribution, the effect of errors and of the proposed correction is assessed by simulation. Adequate confidence intervals for the corrected estimates are obtained using a bootstrap variance estimate for the correction and the delta method. As noted by Chen (1998, Biometrics 54, 899-908), even unbiased estimators of the distances might lead to biased density estimators, depending on the actual error distribution. In contrast with the findings of Chen, who used an additive model, unbiased estimation of distances, given a multiplicative model, lead to over-estimation of density. Some error distributions result in observed distance distributions that make efficient estimation impossible, by removing the shoulder present in the original detection function. This indicates the need to improve field methods to reduce measurement error. An application of the new methods to a real data set is presented. | |||||
BibTeX:
@article{Marques2004,
author = {Marques, T. A.},
title = {Predicting and correcting bias caused by measurement error in line transect sampling using multiplicative error models},
journal = {Biometrics},
year = {2004},
volume = {60},
number = {3},
pages = {757--763}
}
|
|||||
| Marques, T. A. | 2002 | Amostragem por Distâncias em Populações Naturais [BibTeX] |
: | ||
BibTeX:
@mastersthesis{Marques2002,
author = {Marques, T. A.},
title = {Amostragem por Distâncias em Populações Naturais},
school = {Departamento de Estatística e Investigação Operacional, Faculdade de Ciências da Universidade de Lisboa},
year = {2002}
}
|
|||||
| Marques, T. A., Andersen, M., Christensen-Dalsgaard, S., Belikov, S., Boltunov, A., Wiig, O., Buckland, S. T. & Aars, J. | 2006 | The use of global positioning systems to record distances in a helicopter line-transect survey [BibTeX] |
Wildlife Society Bulletin 34:759--763 | URL PDF | |
BibTeX:
@article{Maretal06,
author = {Marques, Tiago A. and Andersen, Magnus and Christensen-Dalsgaard, Signe and Belikov, Stanislav and Boltunov, Andrei and Wiig, Oystein and Buckland, Stephen T. and Aars, Jon},
title = {The use of global positioning systems to record distances in a helicopter line-transect survey},
journal = {Wildlife Society Bulletin},
year = {2006},
volume = {34},
number = {3},
pages = {759--763},
url = {http://www.creem.st-and.ac.uk/tiago/webpages/pdfs/Marquesetal2006.pdf}
}
|
|||||
| Marques, T. A. & Buckland, S. T. | 2005 | Transectos lineares em situações de não uniformidade das distâncias disponíveis para detecção [BibTeX] |
Estatística Jubilar :445-454 | ||
BibTeX:
@incollection{MarBuc05,
author = {Marques, T. A. and Buckland, S. T.},
title = {Transectos lineares em situações de não uniformidade das distâncias disponíveis para detecção},
booktitle = {Estatística Jubilar},
publisher = {SPE},
year = {2005},
pages = {445-454}
}
|
|||||
| Marques, T. A., Buckland, S. T., Borchers, D. L., Tosh, D. & McDonald, R. A. | 2010 | Point Transect Sampling Along Linear Features [BibTeX] |
Biometrics 66:1247--1255 | DOI | |
BibTeX:
@article{Marques2010,
author = {T. A. Marques and S. T. Buckland and D. L. Borchers and D. Tosh and R. A. McDonald},
title = {Point Transect Sampling Along Linear Features},
journal = {Biometrics},
year = {2010},
volume = {66},
pages = {1247--1255},
doi = {10.1111/j.1541-0420.2009.01381.x}
}
|
|||||
| Marques, T. A., Thomas, L., Fancy, S. G. & Buckland, S. T. | 2007 | Improving estimates of bird density using multiple covariate distance sampling [BibTeX] |
The Auk 124:1229--1243 | ||
| Review: Tenho tambem o ficheiro Marquesetal2007.pdf que é sem ser formatado. | |||||
BibTeX:
@article{Maretal07,
author = {Marques, T. A. and L. Thomas and S. G. Fancy and S. T. Buckland},
title = {Improving estimates of bird density using multiple covariate distance sampling},
journal = {The Auk},
year = {2007},
volume = {124},
pages = {1229--1243}
}
|
|||||
| Marques, T. A., Thomas, L., Ward, J., DiMarzio, N. & Tyack, P. L. | 2009 | Estimating cetacean population density using fixed passive acoustic sensors: an example with Blainville's beaked whales [BibTeX] |
The Journal of the Acoustical Society of America 125:1982--1994 | ||
BibTeX:
@article{Marques2009,
author = {Tiago A. Marques and Len Thomas and Jessica Ward and Nancy DiMarzio and Peter L. Tyack},
title = {Estimating cetacean population density using fixed passive acoustic sensors: an example with {B}lainville's beaked whales},
journal = {The Journal of the Acoustical Society of America},
year = {2009},
volume = {125},
pages = {1982--1994}
}
|
|||||
| Marsden, S., Symes, C. & Mack, A. | 2006 | The response of a New Guinean avifauna to conversion of forest to small-scale agriculture | Ibis 148:629--640 | ||
| Abstract: In comparison with other tropical forest land uses such as selective logging, little is known of the impacts on wildlife of the many forms of small-scale agriculture practised across the tropics. We present density estimates, derived using a point count distance sampling method, for 31 bird species in primary forest, old abandoned gardens and active/recently abandoned gardens at two altitudes in the Crater Mountain Wildlife Management Area (CMWMA), Papua New Guinea. There were clear habitat differences between the six habitat/altitude categories, with, for example, clines in tree sizes and canopy cover from highest values in primary forest to lowest values in current gardens. At lower altitudes, primary forest held highest densities of most species, whereas at higher altitudes, old abandoned gardens had greater densities of many birds, especially insectivores. canoco was used to ordinate bird species with respect to major habitat gradient axes. Major axes were associated with differences in bird responses to forest conversion as well as altitudinal differences in species composition. Most important was that several insectivores (especially monarchs, fantails, etc.) formed a cluster of species associated with intact, high-biomass forest. We suggest that most species reacted moderately to habitat changes currently occurring, and this may be due in part to the fact that only a small proportion of the landscape at CMWMA has been converted to agriculture (around 13% may be current or recently abandoned gardens). There were, however, species with comparatively low densities in agricultural habitats and these included several insectivores, the terrestrial Blue Jewel-babbler Ptilorrhoa caerulescens, and three out of four birds of paradise. © 2006 The Authors. | |||||
BibTeX:
@article{Marsden2006,
author = {Marsden, S.J. and Symes, C.T. and Mack, A.L.},
title = {The response of a New Guinean avifauna to conversion of forest to small-scale agriculture},
journal = {Ibis},
year = {2006},
volume = {148},
number = {4},
pages = {629--640}
}
|
|||||
| Marsden, S., Whiffin, M., Galetti, M. & Fielding, A. | 2005 | How well will Brazil's system of Atlantic forest reserves maintain viable bird populations? | Biodiversity and Conservation 14:2835--2853 | ||
| Abstract: It is crucial for biodiversity conservation that protected areas are large and effective enough to support viable populations of their original species. We used a point count distance sampling method to estimate population sizes of a range of bird species in three Atlantic forest protected areas of size 5600, 22,500, and 46,050 ha. Population sizes were generally related to reserve area, although in the mid-sized reserve, there were many rare species reflecting a high degree of habitat heterogeneity. The proportions of forest species having estimated populations >500 ranged from 55% of 210 species in the largest reserve to just 25% of 140 species in the smallest reserve. All forest species in the largest reserves had expected populations >100, but in the small reserve, 28% (38 species) had populations <100 individuals. Atlantic forest endemics were no more or less likely to have small populations than widespread species. There are 79 reserves (>1000 ha) in the Atlantic forest lowlands. However, all but three reserves in the north of the region (Espi?rito Santo and states north) are smaller than 10,000 ha, and we predict serious levels of local extinction from these reserves. Habitat heterogeneity within reserves may promote species richness within them, but it may also be important in determining species loss over time by suppressing populations of individual species. We suggest that most reserves in the region are so small that homogeneity in the habitat/altitude within them is beneficial for maintenance of their (comparatively small) original species compliment. A lack of protection in the north, continued detrimental human activity inside reserves, and our poor knowledge of how well the reserve system protects individual taxa, are crucial considerations in biodiversity management in the region. © Springer 2005. | |||||
BibTeX:
@article{Marsden2005,
author = {Marsden, S.J. and Whiffin, M. and Galetti, M. and Fielding, A.H.},
title = {How well will Brazil's system of Atlantic forest reserves maintain viable bird populations?},
journal = {Biodiversity and Conservation},
year = {2005},
volume = {14},
number = {12},
pages = {2835--2853}
}
|
|||||
| Marsden, S., Whiffin, M., Sadgrove, L. & Jr, P. R. G. | 2004 | Bird community composition and species abundance on two inshore islands in the Atlantic forest region of Brazil [BibTeX] |
Ararajuba 11:181--187 | ||
BibTeX:
@article{Marsden2004,
author = {Stuart Marsden and Mark Whiffin and Lisa Sadgrove and Paulo R. Guimarães Jr},
title = {Bird community composition and species abundance on two inshore islands {in the Atlantic forest region of Brazil}},
journal = {Ararajuba},
year = {2004},
volume = {11},
pages = {181--187}
}
|
|||||
| Marsden, S. J. | 1999 | Estimation of parrot and hornbill densities using a point count distance sampling method | Ibis 141:377--390 | ||
| Abstract: The suitability of point count distance methods for estimating densities of tropical parrots and hornbills was assessed during surveys in Indonesia. The methods will perform well, so long as the following are considered. (1) Enough bird records must be accumulated to model species' detection curves precisely. For some species, around 2000 point counts may be needed and, in very rare species, the method may not be appropriate. Pooling data across habitats, species or years may increase precision in cases of small sample size. (2) Point counts are likely to be less biased than line transects because bird detection rates close to the recorder may be higher and there may be less chance of double-counting birds. Distances greater than 400 m between census points are unnecessary. (3) Count periods lasting ten minutes may be needed to ensure that most birds close to the recorder are detected. Controlled flushing of concealed birds after the main count period may also be appropriate. (4) The best time of day for census is the period when bird detectability is high but bird mobility low. For many large avian frugivores, this corresponds to the period between one hour after dawn and 10.30 h. (5) Records of flying birds must be excluded from density calculations. In the species studied, between 2% and 20% should be added to density estimates to compensate for the exclusion of flying birds. | |||||
BibTeX:
@article{Marsden1999,
author = {Marsden, S. J.},
title = {Estimation of parrot and hornbill densities using a point count distance sampling method},
journal = {Ibis},
year = {1999},
volume = {141},
number = {3},
pages = {377--390}
}
|
|||||
| Marsden, S. J. | 1998 | Changes in bird abundance following selective logging on Seram, Indonesia [BibTeX] |
Conservation Biology 12:605--611 | ||
BibTeX:
@article{Marsden1998,
author = {Marsden, S. J.},
title = {Changes in bird abundance following selective logging on {Seram, Indonesia}},
journal = {Conservation Biology},
year = {1998},
volume = {12},
pages = {605--611}
}
|
|||||
| Marsden, S. J., Jones, M. J., Linsley, M. D., Mead, C. & Hounsome, M. V. | 1997 | The conservation status of the restricted-range lowland birds of Buru, Indonesia [BibTeX] |
Bird Conservation International 7:213--233 | ||
BibTeX:
@article{Marsden1997,
author = {Marsden, S. J. and Jones, M. J. and Linsley, M. D. and Mead, C. and Hounsome, M. V.},
title = {The conservation status of the restricted-range lowland birds of {Buru, Indonesia}},
journal = {Bird Conservation International},
year = {1997},
volume = {7},
pages = {213--233}
}
|
|||||
| Marsden, S. J. & Pilgrim, J. D. | 2003 | Factors influencing the abundance of parrots and hornbills in pristine and disturbed forests on New Britain, PNG [BibTeX] |
Ibis 145:45--53 | ||
BibTeX:
@article{Marsden2003,
author = {Marsden, S. J. and Pilgrim, J. D.},
title = {Factors influencing the abundance of parrots and hornbills in pristine and disturbed forests on {New Britain, PNG}},
journal = {Ibis},
year = {2003},
volume = {145},
pages = {45--53}
}
|
|||||
| Marsden, S. J., Pilgrim, J. D. & Wilkinson, R. | 2001 | Status, abundance and habitat use of Blue-eyed Cockatoo Cacatua ophthalmica on New Britain, PNG [BibTeX] |
Bird Conservation International 11:151--160 | ||
BibTeX:
@article{Marsden2001a,
author = {Marsden, S. J. and Pilgrim, J. D. and Wilkinson, R.},
title = {Status, abundance and habitat use of Blue-eyed Cockatoo \textit{Cacatua ophthalmica} on New Britain, PNG},
journal = {Bird Conservation International},
year = {2001},
volume = {11},
pages = {151--160}
}
|
|||||
| Marsden, S. J. & Symes, C. T. | 2006 | Abundance and habitat associations of parrots from a hillforest, Papua New Guinea [BibTeX] |
Pacific Conservation Biology 12:15--21 | ||
BibTeX:
@article{Marsden2006a,
author = {Marsden, S. J. and Symes, C. T.},
title = {Abundance and habitat associations of parrots from a hillforest, {Papua New Guinea}},
journal = {Pacific Conservation Biology},
year = {2006},
volume = {12},
pages = {15--21}
}
|
|||||
| Marsden, S. J. & Whiffin, M. | 2003 | The relationship between population density, habitat position and habitat breadth within a neotropical forest bird community [BibTeX] |
Ecography 26:385--392 | ||
BibTeX:
@article{Marsden2003a,
author = {Marsden, S. J. and Whiffin, M.},
title = {The relationship between population density, habitat position and habitat breadth within a neotropical forest bird community},
journal = {Ecography},
year = {2003},
volume = {26},
pages = {385--392}
}
|
|||||
| Marsden, S. J., Whiffin, M. & Galetti, M. | 2001 | Bird diversity and abundance in forest fragments and Eucalyptus plantations around a Brazilian Atlantic forest reserve [BibTeX] |
Biodiversity & Conservation 10:737--751 | ||
BibTeX:
@article{Marsden2001,
author = {Marsden, S. J. and Whiffin, M. and Galetti, M.},
title = {Bird diversity and abundance in forest fragments and {Eucalyptus plantations around a Brazilian Atlantic} forest reserve},
journal = {Biodiversity \& Conservation},
year = {2001},
volume = {10},
pages = {737--751}
}
|
|||||
| Marsden, S. J., Whiffin, M., Galetti, M. & Fielding, A. H. | 2005 | How well will Brazil’s system of Atlantic Forest reserves maintain viable bird populations? [BibTeX] |
Biodiversity and Conservation 14:2835--2853 | ||
BibTeX:
@article{Marsden2005a,
author = {Stuart J. Marsden and Mark Whiffin and Mauro Galetti and Alan H. Fielding},
title = {How well will {Brazil’s system of Atlantic Forest} reserves maintain viable bird populations?},
journal = {Biodiversity and Conservation},
year = {2005},
volume = {14},
pages = {2835--2853}
}
|
|||||
| Marsden, S. J., Whiffin, M., Sadgrove, L. & Guimarães Jr, P. | 2000 | Parrot populations and habitat use in and around two Brazilian Atlantic forest reserves [BibTeX] |
Biological Conservation 96:209--217 | ||
BibTeX:
@article{Marsden2000,
author = {Marsden, S. J. and Whiffin, M. and Sadgrove, L. and Guimarães Jr, P.},
title = {Parrot populations and habitat use in and around two {Brazilian Atlantic forest reserves}},
journal = {Biological Conservation},
year = {2000},
volume = {96},
pages = {209--217}
}
|
|||||
| Marsh, D. M. & Beckman, N. G. | 2004 | Effects of forest roads on the abundance and activity of terrestrial salamanders [BibTeX] |
Ecological Applications 14:1882--1891 | ||
BibTeX:
@article{MarBec04,
author = {David M. Marsh and Noelle G. Beckman},
title = {Effects of forest roads on the abundance and activity of terrestrial salamanders},
journal = {Ecological Applications},
year = {2004},
volume = {14},
pages = {1882--1891}
}
|
|||||
| Marsh, H. & Sinclair, D. F. | 1989 | Correcting for visibility bias in strip transect aerial surveys of aquatic fauna [BibTeX] |
Journal of Wildlife Management 53:1017--1024 | ||
BibTeX:
@article{MarSin89,
author = {Marsh, H. and Sinclair, D. F.},
title = {Correcting for visibility bias in strip transect aerial surveys of aquatic fauna},
journal = {Journal of Wildlife Management},
year = {1989},
volume = {53},
pages = {1017--1024}
}
|
|||||
| Marshall, A. R., Lovett, J. C. & White, P. C. | 2008 | Selection of line-transect methods for estimating the density of group-living animals: lessons from the primates [BibTeX] |
American Journal of Primatology 70:452--462 | ||
BibTeX:
@article{Marshall2008a,
author = {Andrew R. Marshall and Jon C. Lovett and Piran C.L. White},
title = {Selection of line-transect methods for estimating the density of group-living animals: lessons from the primates},
journal = {American Journal of Primatology},
year = {2008},
volume = {70},
pages = {452--462}
}
|
|||||
| Martins, H., Barbosa, H., Hodgson, M., Borralho, R. & Rego, F. | 2003 | Effect of vegetation type and environmental factors on European wild rabbit Oryctolagus cuniculus counts in a southern Portuguese montado | Acta Theriologica 48:385--398 | ||
| Abstract: This study assesses the effect of vegetation and variables related to weather and light conditions on the efficacy of rabbit Oryctolagus cuniculus (Linnaeus, 1758) counts carried out in the south of Portugal. Counts were carried out in two years using driven line transects, and correlated with vegetation type and the variables using generalised linear models. The offset was a surveyed area estimated using Distance Sampling Theory as a means of correcting for detectability bias. More rabbits were observed in dense vegetation during day-time counts and in crops during night-time counts, In 1998, day-time counts were higher with higher average daily temperatures, whilst the night-time counts were higher with higher minimum daily temperatures. In 1999, day-time counts decreased with the amount of rainfall in the previous month, and the night-time counts decreased with the accumulated rainfall in the previous two months and with the higher wind speeds. In order to increase efficacy, counts should be carried out either at dawn or at dusk during the post-breeding season, and with greater intensity in dense scrub or open vegetation with high tree cover. During the breeding season and winter, counts should be carried out after dusk and with greater intensity in arable crops. | |||||
BibTeX:
@article{Martins2003,
author = {Martins, H. and Barbosa, H. and Hodgson, M. and Borralho, R. and Rego, F.},
title = {Effect of vegetation type and environmental factors on European wild rabbit \textit{Oryctolagus cuniculus} counts in a southern Portuguese montado},
journal = {Acta Theriologica},
year = {2003},
volume = {48},
number = {3},
pages = {385--398}
}
|
|||||
| Martínez-Morales, M. A. | 1999 | Conservation status and habitat preferences of the Cozumel Curassow [BibTeX] |
Condor 101:14--20 | ||
BibTeX:
@article{Martinez-Morales1999,
author = {Mart{\'i}nez-Morales, M. A.},
title = {Conservation status and habitat preferences of the Cozumel Curassow},
journal = {Condor},
year = {1999},
volume = {101},
number = {1},
pages = {14--20}
}
|
|||||
| Mateos, M., Arroyo, G. M., RodrÃguez, A., Cuenca, D. & De La Cruz, A. | 2010 | Calibration of visually estimated distances to migrating seabirds with radar measurements [BibTeX] |
Journal of Field Ornithology 81:302--309 | DOI | |
BibTeX:
@article{JOFO:JOFO286,
author = {Mateos, MarÃa and Arroyo, Gonzalo M. and RodrÃguez, Alejandro and Cuenca, David and De La Cruz, Andrés},
title = {Calibration of visually estimated distances to migrating seabirds with radar measurements},
journal = {Journal of Field Ornithology},
year = {2010},
volume = {81},
pages = {302--309},
doi = {10.1111/j.1557-9263.2010.00286.x}
}
|
|||||
| Matsuoka, S. M. & Johnson, J. A. | 2008 | Using A Multimodel Approach to Estimate the Population Size of Mckay's Buntings [BibTeX] |
The Condor 110:371--376 | ||
BibTeX:
@article{Matsuoka2008,
author = {S. M. Matsuoka and J. A. Johnson},
title = {Using A Multimodel Approach to Estimate the Population Size of Mckay's Buntings},
journal = {The Condor},
year = {2008},
volume = {110},
number = {2},
pages = {371--376}
}
|
|||||
| Mattice, J. A., Brauning, D. W. & Diefenbach, D. R. | 2005 | Abundance of Grassland Sparrows on Reclaimed Surface Mines in Western Pennsylvania [BibTeX] |
: | ||
BibTeX:
@techreport{Mattice2005,
author = {Jennifer A. Mattice and Daniel W. Brauning and Duane R. Diefenbach},
title = {Abundance of Grassland Sparrows on Reclaimed Surface Mines in Western Pennsylvania},
year = {2005},
number = {PSW-GTR-191}
}
|
|||||
| Mattson, D. J. & Reinhart, D. P. | 1996 | Indicators of red squirrel (Tamiasciurus hudsonicus) abundance in the whitebark pine zone [BibTeX] |
Great Basin Naturalist 56:272--275 | ||
BibTeX:
@article{MatRei96,
author = {Mattson, D. J. and Reinhart, D. P.},
title = {Indicators of red squirrel (\emph{Tamiasciurus hudsonicus}) abundance in the whitebark pine zone},
journal = {Great Basin Naturalist},
year = {1996},
volume = {56},
pages = {272--275}
}
|
|||||
| Mayfield, H. F. | 1981 | Problems in estimating population size through counts of singing males [BibTeX] |
Estimating Numbers of Terrestrial Birds :220--224 | ||
BibTeX:
@incollection{May81,
author = {Mayfield, H. F.},
title = {Problems in estimating population size through counts of singing males},
booktitle = {Estimating Numbers of Terrestrial Birds},
publisher = {Cooper Ornithological Society},
year = {1981},
number = {6},
pages = {220--224}
}
|
|||||
| Mazerolle, M. J., Bailey, L. L., Kendall, W. L., Royle, J. A., Converse, S. J. & Nichols, J. D. | 2007 | Making great leaps forward: accounting for detectability in herpetological field studies [BibTeX] |
Journal of Herpetology 41:672--689 | ||
BibTeX:
@article{Mazerolle2007,
author = {Marc J. Mazerolle and Larissa L. Bailey and William L. Kendall and J. Andrew Royle and Sarah J. Converse and James D. Nichols},
title = {Making great leaps forward: accounting for detectability in herpetological field studies},
journal = {Journal of Herpetology},
year = {2007},
volume = {41},
pages = {672--689}
}
|
|||||
| McCallum, D. | 2005 | A Conceptual Guide to Detection Probability for Point Counts and Other Count-based Survey Methods [BibTeX] |
: | ||
BibTeX:
@techreport{McCallum,
author = {McCallum, D.A.},
title = {A Conceptual Guide to Detection Probability for Point Counts and Other Count-based Survey Methods},
year = {2005},
number = {PSW-GTR-191}
}
|
|||||
| McClanahan, T. R. | 1986 | Quick population survey method using faecal droppings and a steady state assumption [BibTeX] |
African Journal of Ecology 24:37--39 | ||
BibTeX:
@article{Mcc86,
author = {McClanahan, T. R.},
title = {Quick population survey method using faecal droppings and a steady state assumption},
journal = {African Journal of Ecology},
year = {1986},
volume = {24},
pages = {37--39}
}
|
|||||
| McConville, A. J., Grachev, I. A., Keane, A., Coulson, T., Bekenov, A. B. & Milner-Gulland, E. J. | 2009 | Reconstructing the observation process to correct for changing detection probability of a critically endangered species [BibTeX] |
Endangered Species Research 6:231--237 | URL PDF | |
BibTeX:
@article{McConville2009,
author = {McConville, A. J. and Grachev, I. A. and Keane, A. and Coulson, T. and Bekenov, A. B. and Milner-Gulland, E. J.},
title = {Reconstructing the observation process to correct for changing detection probability of a critically endangered species},
journal = {Endangered Species Research},
year = {2009},
volume = {6},
number = {3},
pages = {231--237},
url = {http://www.int-res.com/abstracts/esr/v6/n3/p231-237/}
}
|
|||||
| McDonald, L. L. | 1980 | Line-intercept sampling for attributes other than coverage and density [BibTeX] |
Journal of Wildlife Management 44:530--533 | ||
BibTeX:
@article{Mcd80,
author = {McDonald, L. L.},
title = {Line-intercept sampling for attributes other than coverage and density},
journal = {Journal of Wildlife Management},
year = {1980},
volume = {44},
pages = {530--533}
}
|
|||||
| McDonald, L. L., Garner, G. W. & Robertson, D. G. | 1999 | Comparison of aerial survey procedures for estimating polar bear density: results of pilot studies in Northern Alaska [BibTeX] |
Marine Mammal Survey and Assessment Methods :37--51 | ||
BibTeX:
@incollection{Mcdetal99,
author = {McDonald, L. L. and Garner, G. W. and Robertson, D. G.},
title = {Comparison of aerial survey procedures for estimating polar bear density: results of pilot studies in {N}orthern {A}laska},
booktitle = {Marine Mammal Survey and Assessment Methods},
publisher = {Balkema},
year = {1999},
pages = {37--51}
}
|
|||||
| McIntyre, G. A. | 1953 | Estimation of plant density using line transects [BibTeX] |
Journal of Ecology 41:319--330 | ||
BibTeX:
@article{Mci53,
author = {McIntyre, G. A.},
title = {Estimation of plant density using line transects},
journal = {Journal of Ecology},
year = {1953},
volume = {41},
pages = {319--330}
}
|
|||||
| McIntyre, N. E. | 1998 | Abundance and habitat affinities of Cyclotrachelus substriatus (Coleoptera: Carabidae) on northern shortgrass prairie [BibTeX] |
Prairie Naturalist 30:157--168 | ||
BibTeX:
@article{McIntyre1998,
author = {McIntyre, N E},
title = {Abundance and habitat affinities of \textit{Cyclotrachelus substriatus} (Coleoptera: Carabidae) on northern shortgrass prairie},
journal = {Prairie Naturalist},
year = {1998},
volume = {30},
pages = {157--168}
}
|
|||||
| McIntyre, N. E. | 1995 | Methamidophos application effects on Pasimachus elongatus (Coleoptera: Carabidae): an update | Environmental Entomology 24:559--563 | ||
| Abstract: Population densities of the predatory ground beetle, P. elongatus, were examined at the Central Plains Experimental Range, Colorado. Using distance sampling theory, density estimates dating from before an application of the insecticide methamidophos (1988) and three beetle generations afterward (1994) were analyzed. Higher population densities were found in shrub dominated than in grass dominated sites, regardless of past methamidophos exposure. The P. elongatus density patterns seen are discussed in relation to possible long-term disruption of the arthropod prey community by metyhamidophos and in relation to competitive release and physiological resistance. -from Author | |||||
BibTeX:
@article{McIntyre1995,
author = {McIntyre, N. E.},
title = {Methamidophos application effects on \textit{Pasimachus elongatus} (Coleoptera: Carabidae): an update},
journal = {Environmental Entomology},
year = {1995},
volume = {24},
number = {3},
pages = {559--563}
}
|
|||||
| McLuckie, A. M., H. D. L., Marr, J. W. & Fridell, R. A. | 2002 | Regional desert tortoise monitoring in the upper Virgin River recovery unit, Washington County, Utah [BibTeX] |
Chelonian Conservation and Biology 4:380--386 | ||
BibTeX:
@article{Mcl02,
author = {McLuckie, A. M., Harstad, D. L and Marr, J. W. and Fridell, R. A.},
title = {Regional desert tortoise monitoring in the upper {V}irgin {R}iver recovery unit, {W}ashington {C}ounty, {U}tah},
journal = {Chelonian Conservation and Biology},
year = {2002},
volume = {4},
pages = {380--386}
}
|
|||||
| McNair, D. & Lombard, C. | 2004 | Population estimates, habitat associations, and management of Ameiva polops (Cope) at Green Cay, United States Virgin Islands | Caribbean Journal of Science 40:353--361 | ||
| Abstract: The endemic St. Croix Ground Lizard (Ameiva polops), listed in 1977 by the United States Fish and Wildlife Service as an endangered species, has not been surveyed since the mid-1990s on Green Cay (5.7 ha), an islet just off the northeastern coast of St. Croix, US Virgin Islands. We conducted six surveys here within three divisions (north, south, beach) along 32 randomly selected fixed-width plots (25 × 4 m) from August to October 2002. The total weighted mean population estimate, using a conservative procedure, was 183 lizards. The number of lizards was positively associated with a greater number of shrub stems. Lizards were more abundant in forested areas in the southern half of the cay (81% of the weighted total), but scarcer than expected on beaches (< 0.05% of the total), especially treeless areas. Since our recent population estimate suggests a decline in the long-term (ca. 35 yr) population of Ameiva polops on Green Cay, mark-resight, recapture surveys, or distance sampling (adjusted for the proportion of animals that are unobserved) are required to obtain population estimates and to assess hurricane effects (since Hugo in 1989) on habitat structure and composition. Copyright 2004 College of Arts and Sciences. | |||||
BibTeX:
@article{McNair2004,
author = {McNair, D.B. and Lombard, C.D.},
title = {Population estimates, habitat associations, and management of \textit{Ameiva polops} (Cope) at Green Cay, United States Virgin Islands},
journal = {Caribbean Journal of Science},
year = {2004},
volume = {40},
number = {3},
pages = {353--361}
}
|
|||||
| McShea, W. & Rappole, J. | 1997 | Variable song rates in three species of passerines and implications for estimating bird populations [BibTeX] |
Journal of Field Ornithology 68:367--375 | ||
| Review: This paper presents evidence that some birds might have different singuing rates by habitat, but also density dependent as well as dependent on distance from the observer. This has clear implications for survey methods. | |||||
BibTeX:
@article{McSRap97,
author = {McShea, WJ and Rappole, JH},
title = {Variable song rates in three species of passerines and implications for estimating bird populations},
journal = {Journal of Field Ornithology},
year = {1997},
volume = {68},
number = {3},
pages = {367--375}
}
|
|||||
| McShea, W. J., Stewart, C. M., Kearns, L. & Bates, S. | 2011 | Road bias for deer density estimates at 2 national parks in Maryland [BibTeX] |
Wildlife Society Bulletin 35:177--184 | DOI URL | |
BibTeX:
@article{WSB:WSB53,
author = {McShea, William J. and Stewart, Chad M. and Kearns, Laura and Bates, Scott},
title = {Road bias for deer density estimates at 2 national parks in Maryland},
journal = {Wildlife Society Bulletin},
publisher = {John Wiley \& Sons, Inc.},
year = {2011},
volume = {35},
number = {3},
pages = {177--184},
url = {http://dx.doi.org/10.1002/wsb.53},
doi = {10.1002/wsb.53}
}
|
|||||
| Meier, S., Yazvenko, S., Blokhin, S., Wainwright, P., Maminov, M., Yakovlev, Y. & Newcomer, M. | 2007 | Distribution and abundance of western gray whales off northeastern Sakhalin Island, Russia, 2001-2003 [BibTeX] |
Environmental Monitoring and Assessment 134:107--136 | URL | |
BibTeX:
@article{Meier2007,
author = {Meier, S. and Yazvenko, S. and Blokhin, S. and Wainwright, P. and Maminov, M. and Yakovlev, Y. and Newcomer, M.},
title = {Distribution and abundance of western gray whales off northeastern Sakhalin Island, Russia, 2001-2003},
journal = {Environmental Monitoring and Assessment},
year = {2007},
volume = {134},
pages = {107--136},
url = {http://dx.doi.org/10.1007/s10661-007-9811-2}
}
|
|||||
| Mellinger, D. K., Stafford, K. M., Moore, S. E., Dziak, R. P. & Matsumoto, H. | 2007 | An overview of fixed passive acoustic observation methods for cetaceans [BibTeX] |
Oceanography 20:36-45 | ||
BibTeX:
@article{Mellinger2007a,
author = {D. K. Mellinger and K. M. Stafford and S. E. Moore and R. P. Dziak and H. Matsumoto},
title = {An overview of fixed passive acoustic observation methods for cetaceans},
journal = {Oceanography},
year = {2007},
volume = {20},
pages = {36-45}
}
|
|||||
| Melville, G. J. & Welsh, A. H. | 2001 | Line transect sampling in small regions | Biometrics 57:1130--1137 | ||
| Abstract: This article develops an approach to estimating population abundance from line transect surveys that uses a calibration survey to estimate the detection function, which is then employed as a weight function in constructing the abundance estimate. Nonparametric methods of estimating the detection function via local regression and via a kernel density estimator are considered. The proposed methods are evaluated using a set of Western Australian plant data and weed enumeration data. | |||||
BibTeX:
@article{Melville2001,
author = {Melville, G. J. and Welsh, A. H.},
title = {Line transect sampling in small regions},
journal = {Biometrics},
year = {2001},
volume = {57},
number = {4},
pages = {1130--1137}
}
|
|||||
| Mercey, K. A. & Jayaraman, K. | 1999 | Predicting the variation in detection function in line transect sampling through random parameter model [BibTeX] |
Environmental and Ecological Statistics 6:341--350 | ||
BibTeX:
@article{MerJar99,
author = {Mercey, K. A. and Jayaraman, K.},
title = {Predicting the variation in detection function in line transect sampling through random parameter model},
journal = {Environmental and Ecological Statistics},
year = {1999},
volume = {6},
pages = {341--350}
}
|
|||||
| Meredith, M. | 2006 | Analysing orang utan nest data with DISTANCE [BibTeX] |
: | ||
BibTeX:
@unpublished{Meredith2006,
author = {Meredith, M},
title = {Analysing orang utan nest data with DISTANCE},
year = {2006},
note = {An interesting tutorial}
}
|
|||||
| Meriggi, A. & Verri, A. | 1990 | Population dynamics and habitat selection of the European hare on poplar monocultures in northern Italy [BibTeX] |
Acta Theriologica 35:69--76 | ||
BibTeX:
@article{MerVer90,
author = {Meriggi, A. and Verri, A.},
title = {Population dynamics and habitat selection of the European hare on poplar monocultures in northern {I}taly},
journal = {Acta Theriologica},
year = {1990},
volume = {35},
pages = {69--76}
}
|
|||||
| Miller, S. G., Knight, R. L. & Miller, C. K. | 1998 | Influence of recreational trails on breeding birds communities [BibTeX] |
Ecological Applications 8:162--169 | ||
BibTeX:
@article{Miletal98,
author = {Miller, S. G. and Knight, R. L. and Miller, C. K.},
title = {Influence of recreational trails on breeding birds communities},
journal = {Ecological Applications},
year = {1998},
volume = {8},
pages = {162--169}
}
|
|||||
| Mobley Jr., J. R., Spitz, S. S., Forney, K. A., Grotefendt, R. & Forestell, P. H. | 2000 | Distribution and abundance of odontocete species in Hawaiian waters: preliminary results of 1993-98 aerial surveys [BibTeX] |
: | ||
BibTeX:
@techreport{Mobley2000,
author = {Mobley Jr., J. R. and Scott S. Spitz and Karin A. Forney and Richard Grotefendt and Paul H. Forestell},
title = {Distribution and abundance of odontocete species in {H}awaiian waters: preliminary results of 1993-98 aerial surveys},
year = {2000},
number = {LJ-00-14C}
}
|
|||||
| Mobley, J., Spitz, S. & Grotefendt, R. | 2001 | Abundance of humpback whales in Hawaiian waters: results of 1993-2000 aerial surveys [BibTeX] |
: | ||
BibTeX:
@techreport{Mobley2001,
author = {Mobley, J. and Spitz, S. and Grotefendt, R.},
title = {Abundance of humpback whales in Hawaiian waters: results of 1993-2000 aerial surveys},
year = {2001}
}
|
|||||
| Mohamed, Z., I., A. M. & S., S. A. | 2003 | Population size of red junglefowl (Gallus Gallus Spadiceus) in agriculture areas | Pakistan Journal of Scientific and Industrial Research 46:52--57 | ||
| Abstract: A two-year study was conducted on the population size of Red Junglefowl (Gallus gallus spadiceus) in five agricultural areas in the state of Selangor, Peninsular Malaysia. In the first year (from August 1995 to July 1996) the study was conducted in three habitats viz. rubber plantation, 22-year old oil palm plantation and orchard area at Universitiy Putra, Malaysia. In the second year (from August 1996 to July 1997) two additional habitats viz. 4 and 8 years old oil palm plantation at Sungai, Sedu Estate were selected. Red Junglefowl density was estimated by Distance Sampling Method. Habitat condition was also assessed to determine factors that affected the population size. The densities in 4 years, 8 years and 22 years old oil palm, rubber plantations and orchard were 84.22 km-2, 27.80 km-2, 21.43 km-2, 15.66 km-2 and 6.06 km-2 respectively. The average group size was two birds per group. The largest group comprised of 10 birds was observed in an 8 years old palm oil plantation. The height of the canopy cover was found to have a significant effect on the density of Red Junglefowl. Low canopy cover provides the Red Junglefowl protection against predators and suitable roosting sites. | |||||
BibTeX:
@article{Zakaria2003,
author = {ZAKARIA Mohamed and ARSHAD Muhammad I. and SAJAP Ahmad S.},
title = {Population size of red junglefowl (\textit{Gallus Gallus Spadiceus}) in agriculture areas},
journal = {Pakistan Journal of Scientific and Industrial Research},
year = {2003},
volume = {46},
pages = {52--57}
}
|
|||||
| Monteiro, J. & Alpizar-Jara, R. | 2006 | Estimação bayesiana de g0 em amostragem por distâncias [BibTeX] |
Cência Estatística :501-510 | ||
BibTeX:
@incollection{MonAlp06,
author = {Monteiro, J. and Alpizar-Jara, R.},
title = {Estima\c{c}{\~a}o bayesiana de g0 em amostragem por dist{\^a}ncias},
booktitle = {C{\^e}ncia Estat{\'i}stica},
publisher = {SPE},
year = {2006},
pages = {501-510}
}
|
|||||
| Monteiro, J. F. | 2011 | Modelo combinado captura-recaptura e transectos lineares: uma abordagem bayesiana [BibTeX] |
: | ||
| Review: Entretanto, apercebi-me que elem do que esta escrito em AJM.pdf (tambem impresso como JB129), falhei porque (1) este método não dá para usar com amostragem por distancias tradicionais (ver tb uns comentarios de Jeff Laake ao paper alpizar e pollock 1999 | |||||
BibTeX:
@phdthesis{Monteiro2011,
author = {João Filipe Monteiro},
title = {Modelo combinado captura-recaptura e transectos lineares: uma abordagem bayesiana},
school = {Universidade de Évora, Departamento de Matemática},
year = {2011}
}
|
|||||
| Moore, J. E. & Barlow, J. | 2011 | Bayesian state-space model of fin whale abundance trends from a 1991-2008 time series of line-transect surveys in the California Current [BibTeX] |
Journal of Applied Ecology : | DOI URL | |
BibTeX:
@article{Moore2011,
author = {Moore, Jeffrey E. and Barlow, Jay},
title = {Bayesian state-space model of fin whale abundance trends from a 1991-2008 time series of line-transect surveys in the California Current},
journal = {Journal of Applied Ecology},
publisher = {Blackwell Publishing Ltd},
year = {2011},
url = {http://dx.doi.org/10.1111/j.1365-2664.2011.02018.x},
doi = {10.1111/j.1365-2664.2011.02018.x}
}
|
|||||
| Morgan, D., Sanz, C., Onononga, J. & Strindberg, S. | 2006 | Ape abundance and habitat use in the Goualougo Triangle, Republic of Congo | International Journal of Primatology 27:147--149 | ||
| Abstract: Chimpanzee (Pan troglodytes troglodytes) and western gorilla (Gorilla gorilla gorilla) populations in central Africa are rapidly declining as a result of disease epidemics, commercial bushmeat hunting, and habitat destruction. Our main objective was to estimate the absolute abundance and habitat utilization of chimpanzees and gorillas in the intact forests of the Goualougo Triangle in the Republic of Congo, and in an adjacent area in which selective logging will take place in the near future. The estimates provide a unique baseline for apes inhabiting an undisturbed environment. A second objective was to compare estimates of abundance and patterns of habitat utilization generated by different techniques: 1) distance sampling of individual ape nests and nest sites along line transects, 2) direct observations of apes during reconnaissance surveys, and 3) observations of ape traces during reconnaissance surveys. We completed a total of 222 km of line transect surveys in 4 sampling areas, resulting in overall density estimates of 1.53 chimpanzees/km2 and 2.34 gorillas/km2 from nest sites. We generated a density estimate of 2.23 chimpanzees/km2 from direct observations during reconnaissance surveys of a semihabituated community in 1 of the 4 sampling areas. Habitat use profiles that nest surveys depicted on transects differed from those of direct observations and traces we encountered on reconnaissance surveys. We found the highest overall abundance of chimpanzee nests in monodominant Gilbertiodendron forest, whereas our direct observations showed that chimpanzees preferred mixed species forest. Transects that traversed the core area of the community range had the highest encounter rates of chimpanzee nests and nest sites. Gorilla nests on transects showed a preference only for mixed species forest with an open canopy, but direct observations and traces on reconnaissance surveys clearly indicated that gorillas use several habitat types. We conclude by evaluating the precision of these nest surveys and our ability to detect future trends in ape densities in the Goualougo Triangle. © 2006 Springer Science+Business Media, Inc. | |||||
BibTeX:
@article{Morgan2006,
author = {Morgan, D. and Sanz, C. and Onononga, J.R. and Strindberg, S.},
title = {Ape abundance and habitat use in the Goualougo Triangle, Republic of Congo},
journal = {International Journal of Primatology},
year = {2006},
volume = {27},
number = {1},
pages = {147--149}
}
|
|||||
| Morgan, D., Sanz, C., Onononga, J. & Strindberg, S. | 2006 | Ape Abundance and Habitat Use in the Goualougo Triangle, Republic of Congo [BibTeX] |
International Journal of Primatology 27:147-179 | URL | |
BibTeX:
@article{springerlink:10.1007/s10764-005-9013-0,
author = {Morgan, David and Sanz, Crickette and Onononga, Jean and Strindberg, Samantha},
title = {Ape Abundance and Habitat Use in the Goualougo Triangle, Republic of Congo},
journal = {International Journal of Primatology},
publisher = {Springer Netherlands},
year = {2006},
volume = {27},
pages = {147-179},
note = {10.1007/s10764-005-9013-0},
url = {http://dx.doi.org/10.1007/s10764-005-9013-0}
}
|
|||||
| Morgan, D. G. | 1986 | Estimating Vertebrate Population Densities by Line Transect Methods [BibTeX] |
: | ||
BibTeX:
@techreport{Mor86,
author = {Morgan, D. G.},
title = {Estimating Vertebrate Population Densities by Line Transect Methods},
year = {1986}
}
|
|||||
| Mori, M., Butterworth, D., Brand A., Rademeyer, R., Okamura, H. & Matsuda, H. | 2003 | Observer experience and Antarctic minke whale sighting ability in IWC/IDCR-SOWER surveys [BibTeX] |
Journal of Cetacean Research and Management 5:1--11 | ||
BibTeX:
@article{Mori2003,
author = {Mori, M and Butterworth, DS and Brand\aeo, A and Rademeyer, RA and Okamura, H and Matsuda, H},
title = {Observer experience and Antarctic minke whale sighting ability in IWC/IDCR-SOWER surveys},
journal = {Journal of Cetacean Research and Management},
year = {2003},
volume = {5},
number = {1},
pages = {1--11}
}
|
|||||
| Morrison, M. L., Mannan, R. W. & Dorsey, G. L. | 1981 | Effects of number of circular plots on estimates of avian density and species richness [BibTeX] |
Estimating Numbers of Terrestrial Birds :405--408 | ||
BibTeX:
@incollection{Moretal81,
author = {Morrison, M. L. and Mannan, R. W. and Dorsey, G. L.},
title = {Effects of number of circular plots on estimates of avian density and species richness},
booktitle = {Estimating Numbers of Terrestrial Birds},
publisher = {Cooper Ornithological Society},
year = {1981},
number = {6},
pages = {405--408}
}
|
|||||
| Morrison, M. L. & Marcot, B. G. | 1984 | Expanded use of the variable circular-plot census method [BibTeX] |
Wilson Bulletin 96:313--315 | ||
BibTeX:
@article{MorMar84,
author = {Morrison, M. L. and Marcot, B. G.},
title = {Expanded use of the variable circular-plot census method},
journal = {Wilson Bulletin},
year = {1984},
volume = {96},
pages = {313--315}
}
|
|||||
| Morrogh-Bernard, H., Husson, S., Page, S. & Rieley, J. | 2003 | Population status of the Bornean orang-utan (Pongo pygmaeus) in the Sebangau peat swamp forest, Central Kalimantan, Indonesia [BibTeX] |
Biological Conservation 110:141--152 | ||
BibTeX:
@article{Morrogh-Bernard2003,
author = {Morrogh-Bernard, H. and Husson, S. and Page, S.E. and Rieley, J.O.},
title = {Population status of the Bornean orang-utan (\textit{Pongo pygmaeus}) in the Sebangau peat swamp forest, Central Kalimantan, Indonesia},
journal = {Biological Conservation},
year = {2003},
volume = {110},
number = {1},
pages = {141--152}
}
|
|||||
| Moskat, C. & Baldi, A. | 1999 | The importance of edge effect in line transect censuses applied in marshland habitats [BibTeX] |
Ornis Fennica 76:33--40 | ||
BibTeX:
@article{MosBal99,
author = {Moskat, C. and Baldi, A.},
title = {The importance of edge effect in line transect censuses applied in marshland habitats},
journal = {Ornis Fennica},
year = {1999},
volume = {76},
pages = {33--40}
}
|
|||||
| Muchaal, P. K. & Ngandjui, G. | 1999 | Impact of village hunting on wildlife populations in the western Dia Reserve, Cameroon [BibTeX] |
Conservation Biology 13:385--396 | ||
BibTeX:
@article{MucNga99,
author = {Muchaal, P. K. and Ngandjui, G.},
title = {Impact of village hunting on wildlife populations in the western {D}ia {R}eserve, {C}ameroon},
journal = {Conservation Biology},
year = {1999},
volume = {13},
pages = {385--396}
}
|
|||||
| Mugangu, T. E., Hunter, M. L. & Gilbert, J. R. | 1995 | Food, water, and predation: a study of habitat selection by buffalo in Virunga National Park, Zaire [BibTeX] |
Mammalia 59:349--362 | ||
BibTeX:
@article{Mugetal95,
author = {Mugangu, T. E. and Hunter, M. L. and Gilbert, J. R.},
title = {Food, water, and predation: a study of habitat selection by buffalo in {V}irunga {N}ational {P}ark, {Z}aire},
journal = {Mammalia},
year = {1995},
volume = {59},
pages = {349--362}
}
|
|||||
| Mullin, K. D. & Fulling, G. L. | 2004 | Abundance of cetaceans in the oceanic Northern Gulf of Mexico, 1996-2001 [BibTeX] |
Marine Mammal Science 20:787--807 | ||
BibTeX:
@article{Mullin2004,
author = {Keith D. Mullin and Gregory L. Fulling},
title = {Abundance of cetaceans in the oceanic {Northern Gulf of Mexico, 1996-2001}},
journal = {Marine Mammal Science},
year = {2004},
volume = {20},
pages = {787--807}
}
|
|||||
| Mullin, K. D. & Fulling, G. L. | 2003 | Abundance of cetaceans in the southern U.S. North Atlantic Ocean during summer 1998 [BibTeX] |
Fisheries Bulletin 101:603-613 | ||
BibTeX:
@article{Mullin2003,
author = {Keith D. Mullin and Gregory L. Fulling},
title = {Abundance of cetaceans in the southern {U.S. North Atlantic Ocean} during summer 1998},
journal = {Fisheries Bulletin},
year = {2003},
volume = {101},
pages = {603-613}
}
|
|||||
| Myrberget, S. | 1976 | Field tests of line transect census methods for grouse [BibTeX] |
Norwegian Journal of Zoology 24:307--317 | ||
BibTeX:
@article{Myr76,
author = {Myrberget, S.},
title = {Field tests of line transect census methods for grouse},
journal = {Norwegian Journal of Zoology},
year = {1976},
volume = {24},
pages = {307--317}
}
|
|||||
| Naugle, R., Rutberg, A., Underwood, H., Turner Jr., J. & Liu, I. | 2002 | Field testing of immunocontraception on white-tailed deer (Odocoileus virginianus) on Fire Island National Seashore, New York, USA. | Reproduction (Cambridge, England) Supplement 60:143--153 | ||
| Abstract: Application of contraception for the control of suburban populations of white-tailed deer (Odocoileus virginianus) has been much debated, but few data are available on field applications and even fewer on population effects. Between 1993 and 1997, 74-164 individually known female deer living on Fire Island, New York, USA, were treated remotely with an initial shot of 65 microg porcine zona pellucida (PZP) in Freund's complete adjuvant followed by booster injections of 65 microg PZP in Freund's incomplete adjuvant. Starting in 1996, progressively increasing numbers of deer were treated with vaccinating/marking darts. Estimates of population density and composition, using distance sampling methods, began in 1995 in selected portions of the study area. Between 1993 and 1997, fawning rates among individually known, treated adult females decreased by 78.9% from pretreatment rates. Population density in the most heavily treated area increased by 11% per year from 1995 to March 1998 and then decreased at 23% per year to October 2000. In 1999-2000 surveys, fawns comprised 13-14% of the total population in the most heavily treated area, versus 16-33% in nearby untreated areas. These results show that PZP can be delivered effectively to sufficient deer to affect population density and composition in some environments, but that technical and logistical improvements are needed before contraception can be used widely to manage suburban deer populations. | |||||
BibTeX:
@article{Naugle2002,
author = {Naugle, R.E. and Rutberg, A.T. and Underwood, H.B. and Turner Jr., J.W. and Liu, I.K.},
title = {Field testing of immunocontraception on white-tailed deer \textit{(Odocoileus virginianus)} on Fire Island National Seashore, New York, USA.},
journal = {Reproduction (Cambridge, England) Supplement},
year = {2002},
volume = {60},
pages = {143--153}
}
|
|||||
| Nchanji, A. C. & Plumptre, A. | 2001 | Seasonality in elephant dung decay and implications for censusing and population monitoring in south-western Cameroon [BibTeX] |
African Journal of Ecology 39:24--32 | ||
BibTeX:
@article{NchPlu01,
author = {Nchanji, A. C. and Plumptre, A.},
title = {Seasonality in elephant dung decay and implications for censusing and population monitoring in south-western {C}ameroon},
journal = {African Journal of Ecology},
year = {2001},
volume = {39},
pages = {24--32}
}
|
|||||
| Nelson, J. & Fancy, S. | 1999 | A test of the variable circular-plot method where exact density of a bird population was known [BibTeX] |
Pacific Conservation Biology 5:139--143 | ||
BibTeX:
@article{Nelson1999,
author = {Nelson, JT and Fancy, SG},
title = {A test of the variable circular-plot method where exact density of a bird population was known},
journal = {Pacific Conservation Biology},
year = {1999},
volume = {5},
pages = {139--143}
}
|
|||||
| Newey, S., Bell, M., Enthoven, S. & Thirgood, S. | 2003 | Can distance sampling and dung plots be used to assess the density of mountain hares Lepus timidus? | Wildlife Biology 9:185--192 | ||
| Abstract: We evaluated distance sampling and dung plots as cost-effective methods of estimating the density of mountain hares Lepus timidus on moorland in the Scottish Highlands. We compared density estimates derived from these techniques to those derived from labour-intensive capture-recapture techniques. Distance sampling and capture-recapture techniques produced comparable density estimates at medium and low hare densities. Density estimates derived from distance sampling were higher than those derived from capture-recapture in high-density hare populations. Both distance sampling and capture-recapture techniques gave wide confidence intervals at high hare density. Histograms of perpendicular sighting distances showed that a large proportion of hares were seen on or close to the transect line and that there was a rapid fall off in detection rates with distance. This finding indicated that hare behaviour may lead to problematic survey design and may reduce the precision of density estimates. The collection of accurate distance sampling data was particularly problematic when hare density was high. In contrast, in low-density hare populations, considerable sampling effort was required to obtain sufficient sightings of hares to reliably estimate density. Dung plots provided a relative index of abundance that successfully ranked populations of mountain hares in order of increasing density as determined by distance sampling and capture-recapture techniques. With careful study design, distance sampling provides a good compromise between accuracy, precision and effort in estimating the density of mountain hares. The use of dung plots is a rapid alternative when only estimates of relative abundance are required. | |||||
BibTeX:
@article{Newey2003,
author = {Newey, S. and Bell, M. and Enthoven, S. and Thirgood, S.},
title = {Can distance sampling and dung plots be used to assess the density of mountain hares \textit{Lepus timidus}?},
journal = {Wildlife Biology},
year = {2003},
volume = {9},
number = {3},
pages = {185--192}
}
|
|||||
| Newson, S., Woodburn, R., Noble, D., Baillie, S. & Gregory, R. | 2005 | Evaluating the Breeding Bird Survey for producing national population size and density estimates | Bird Study 52:42--54 | ||
| Abstract: Capsule: The BBS has potential for producing better estimates of habitat-specific densities and population sizes for many UK bird populations than those available previously. Aims: To examine the use of the Breeding Bird Survey (BBS) in providing unbiased national population and habitat-specific density estimates of British birds. Methods: Line transect data collected by volunteers in 1998 from 2287 1-km squares across the UK were analysed using distance sampling methods to calculate habitat-specific density and abundance estimates. For each species, the habitat-specific decline in detectability with distance from a transect line was modelled and applied at a regional level to incorporate variation in sampling intensity in different areas of the country. Results: National population and density estimates calculated here were at a magnitude expected for at least seven species in this study. However, national population size estimates were higher than expected for Starling Sturnus vulgaris, House Sparrow Passer domesticus, Blackbird Turdus merula, Greenfinch Carduelis chloris, Jackdaw Corvus monedula, Whitethroat Sylvia communis, Woodpigeon Columba palumbus and Linnet Carduelis cannabina and lower than expected for Skylark Alauda arvensis, Dunnock Prunella modularis, Song Thrush Turdus philomelos and Corn Bunting Miliaria calandra. These differences are likely to be related to differences in sampling design and survey methods. For example, Starling, House Sparrow, Blackbird, Jackdaw, Greenfinch and Wood Pigeon, which have considerable populations in urban areas, were undoubtedly underestimated by the Common Birds Census (CBC). The counts of species that flock during the breeding season, or are not strongly territorial (e.g. Linnet, Jackdaw and Wood Pigeon) could be biased if detectability is strongly related to flock size. National population estimates of Skylark and Corn Bunting are lower than those based on CBC, but higher, or similar, to targeted national surveys of these species. Possible reasons for the differences between these estimates are considered. Conclusions: This study highlights the strength of the BBS over previous data sources in producing national estimates of density and abundance at the habitat and national level. More research on the sex ratio and status of birds counted during surveys, and on the reliability of the detectability functions derived from distance sampling is needed to improve the interpretation of population estimates derived from BBS data. © 2005 British Trust for Ornithology. | |||||
BibTeX:
@article{Newson2005,
author = {Newson, S.E. and Woodburn, R.J.W. and Noble, D.G. and Baillie, S.R. and Gregory, R.D.},
title = {Evaluating the Breeding Bird Survey for producing national population size and density estimates},
journal = {Bird Study},
year = {2005},
volume = {52},
number = {1},
pages = {42--54}
}
|
|||||
| Newson, S. E., Evans, K. L., Noble, D. G. & Gaston, J. J. D. G. K. J. | 2008 | Use of distance sampling to improve estimates of national population sizes for common and widespread breeding birds in the UK [BibTeX] |
Journal of Applied Ecology 45:1330--1338 | ||
BibTeX:
@article{Newson2008,
author = {Stuart E. Newson and Karl L. Evans and David G. Noble and Jeremy J. D. Greenwoodand Kevin J. Gaston},
title = {Use of distance sampling to improve estimates of national population sizes for common and widespread breeding birds in the UK},
journal = {Journal of Applied Ecology},
year = {2008},
volume = {45},
pages = {1330--1338}
}
|
|||||
| Nice, M. M. & Nice, L. B. | 1921 | The roadside census [BibTeX] |
Wilson Bulletin 33:113--123 | ||
BibTeX:
@article{NicNic21,
author = {Nice, M. M. and Nice, L. B.},
title = {The roadside census},
journal = {Wilson Bulletin},
year = {1921},
volume = {33},
pages = {113--123}
}
|
|||||
| Nichols, J., Thomas, L. & Conn, P. | 2008 | Inferences about landbird abundance from count data: recent advances and future directions [BibTeX] |
EURING 2007 proceedingsModelling demographic processes in marked populations. Environmental and Ecological Statistics 3:203-238 | ||
BibTeX:
@inproceedings{Nicetal08,
author = {Nichols, J.D. and L. Thomas and P.B. Conn},
title = {Inferences about landbird abundance from count data: recent advances and future directions},
booktitle = {Modelling demographic processes in marked populations. Environmental and Ecological Statistics},
journal = {EURING 2007 proceedings},
year = {2008},
volume = {3},
pages = {203-238}
}
|
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| Nichols, J. D., Hines, J. E., Sauer, J. R., Fallon, F. W., Fallon, J. E. & Heglund, P. J. | 2000 | A double-observer approach for estimating detection probability and abundance from point counts [BibTeX] |
The Auk 117:393--408 | ||
BibTeX:
@article{Nicetal00,
author = {Nichols, J. D and Hines, J. E and Sauer, J. R and Fallon, F. W and Fallon, J. E. and Heglund, P. J.},
title = {A double-observer approach for estimating detection probability and abundance from point counts},
journal = {The Auk},
year = {2000},
volume = {117},
pages = {393--408}
}
|
|||||
| Nichols, J. D., Tomlinson, R. E. & Waggerman, G. | 1986 | Estimating nest detection probabilities for white-winged dove nest transects in Tamaulipas, Mexico [BibTeX] |
The Auk 103:825--828 | ||
BibTeX:
@article{Nicetal86,
author = {Nichols, J. D. and Tomlinson, R. E. and Waggerman, G.},
title = {Estimating nest detection probabilities for white-winged dove nest transects in {T}amaulipas, {M}exico},
journal = {The Auk},
year = {1986},
volume = {103},
pages = {825--828}
}
|
|||||
| Nielson, R. & Stahl, M. B. | 2008 | Investigation of the Properties of an Aerial Line Transect Survey for Polar Bears in the Chukchi Sea Using Computer Simulation [BibTeX] |
: | ||
BibTeX:
@techreport{Nielson2008,
author = {Ryan Nielson and Michelle Bourassa Stahl},
title = {Investigation of the Properties of an Aerial Line Transect Survey for Polar Bears in the Chukchi Sea Using Computer Simulation},
year = {2008}
}
|
|||||
| Nielson, R. M., McDonald, L. L. & Kovach, S. D. | 2006 | Aerial line transect survey protocols and data analysis methods to monitor moose (Alces alces) abundance as applied on the Innoko National Wildlife Refuge, Alaska [BibTeX] |
: | ||
BibTeX:
@techreport{Nielson2006,
author = {Nielson, R. M. and McDonald, L. L. and Kovach, S. D.},
title = {Aerial line transect survey protocols and data analysis methods to monitor moose (Alces alces) abundance as applied on the Innoko National Wildlife Refuge, Alaska},
year = {2006}
}
|
|||||
| Niemi, A. & Fernández, C. | 2010 | Bayesian spatial point process modeling of line transect data [BibTeX] |
Journal of Agricultural, Biological, and Environmental Statistics 15:327-345 | DOI | |
BibTeX:
@article{Niemi2010,
author = {Aki Niemi and Carmen Fernández},
title = {Bayesian spatial point process modeling of line transect data},
journal = {Journal of Agricultural, Biological, and Environmental Statistics},
year = {2010},
volume = {15},
pages = {327-345},
doi = {10.1007/s13253-010-0024-8}
}
|
|||||
| Nijman, V. & Menken, S. B. J. | 2005 | Assessment of census techniques for estimating density and biomass of gibbons (Primates: Hylobatidae) [BibTeX] |
The Raffles Bulletin of Zoology 53:169-179 | ||
BibTeX:
@article{Nijman,
author = {Nijman, V. and Menken, S. B. J.},
title = {Assessment of census techniques for estimating density and biomass of gibbons (Primates: Hylobatidae)},
journal = {The Raffles Bulletin of Zoology},
year = {2005},
volume = {53},
pages = {169-179}
}
|
|||||
| Nikolov, S. C. | 2009 | Effects of land abandonment and changing habitat structure on avian assemblages in upland pastures of Bulgaria [BibTeX] |
Bird Conservation International 19:1--14 | DOI | |
BibTeX:
@article{Nikolov2009,
author = {Stoyan C. Nikolov},
title = {Effects of land abandonment and changing habitat structure on avian assemblages in upland pastures of {Bulgaria}},
journal = {Bird Conservation International},
year = {2009},
volume = {19},
pages = {1--14},
doi = {10.1017/S0959270909990244}
}
|
|||||
| Nikolov, S. C. | 2007 | Study on the habitat selection by birds in mature and over-mature Macedonian pine Pinus peuce forests in the Pirin National park, Bulgaria [BibTeX] |
Acrocephalus 28:97--106 | ||
BibTeX:
@article{Nikolov07,
author = {Nikolov, S. C.},
title = {Study on the habitat selection by birds in mature and over-mature {Macedonian pine \textit{Pinus peuce} forests in the Pirin National park, Bulgaria}},
journal = {Acrocephalus},
year = {2007},
volume = {28},
pages = {97--106}
}
|
|||||
| Nikolov, S. C. | 2007 | Density and community structure of breeding birds in Macedonian pine Pinus peuce forests in Bulgaria [BibTeX] |
Avocetta 31:53--60 | ||
BibTeX:
@article{Nikolov07b,
author = {Nikolov, S. C.},
title = {Density and community structure of breeding birds in {Macedonian pine \textit{Pinus peuce} forests in Bulgaria}},
journal = {Avocetta},
year = {2007},
volume = {31},
pages = {53--60}
}
|
|||||
| Nikolov, S. C. & Spasov, S. | 2005 | Frequency, density and numbers of some breeding birds in the south part of Kresna Gorge (SW Bulgaria) [BibTeX] |
Acrocephalus 26:23--31 | ||
BibTeX:
@article{Nikolov05,
author = {Nikolov, S. C. and Spasov, S.},
title = {Frequency, density and numbers of some breeding birds in the south part of {Kresna Gorge (SW Bulgaria)}},
journal = {Acrocephalus},
year = {2005},
volume = {26},
pages = {23--31}
}
|
|||||
| Nikolov, S. C., Spasov, S. & Kambourova, N. | 2006 | Density, number and habitat use of Common Buzzard Buteo buteo wintering in the lowlands of Bulgaria [BibTeX] |
Buteo 15:39--47 | ||
BibTeX:
@article{Nikolov06,
author = {Nikolov, S. C. and Spasov, S. and Kambourova, N.},
title = {Density, number and habitat use of {Common Buzzard \textit{Buteo buteo} wintering in the lowlands of Bulgaria}},
journal = {Buteo},
year = {2006},
volume = {15},
pages = {39--47}
}
|
|||||
| Noke Durden, W., Stolen, E. & Stolen, M. | 2011 | Abundance, Distribution, and Group Composition of Indian River Lagoon Bottlenose Dolphins (Tursiops truncatus) [BibTeX] |
Aquatic Mammals 37:175--186 | DOI | |
BibTeX:
@article{NokeDurden2011,
author = {Noke Durden, W. and Stolen, E.D. and Stolen, M.K.},
title = {Abundance, Distribution, and Group Composition of Indian River Lagoon Bottlenose Dolphins (\textit{Tursiops truncatus})},
journal = {Aquatic Mammals},
year = {2011},
volume = {37},
pages = {175--186},
doi = {10.1578/AM.37.2.2011.175}
}
|
|||||
| Norris, D., Rocha-Mendes, F., Marques, R., de Almeida Nobre, R. & Galetti, M. | 2011 | Density and Spatial Distribution of Buffy-tufted-ear Marmosets (Callithrix aurita) in a Continuous Atlantic Forest [BibTeX] |
International Journal of Primatology :1-19 | URL | |
BibTeX:
@article{springerlink:10.1007/s10764-011-9503-1,
author = {Norris, Darren and Rocha-Mendes, Fabiana and Marques, Renato and de Almeida Nobre, Rodrigo and Galetti, Mauro},
title = {Density and Spatial Distribution of Buffy-tufted-ear Marmosets (\textit{Callithrix aurita}) in a Continuous Atlantic Forest},
journal = {International Journal of Primatology},
publisher = {Springer Netherlands},
year = {2011},
pages = {1-19},
note = {10.1007/s10764-011-9503-1},
url = {http://dx.doi.org/10.1007/s10764-011-9503-1}
}
|
|||||
| Norvell, R. E., Howe, F. P. & Parrish, J. R. | 2003 | A seven-year comparison of relative-abundance and distance-sampling methods [BibTeX] |
The Auk 120:1013--1028 | ||
BibTeX:
@article{Nor2003,
author = {Norvell, R. E. and Howe, F. P. and Parrish, J. R.},
title = {A seven-year comparison of relative-abundance and distance-sampling methods},
journal = {The Auk},
year = {2003},
volume = {120},
pages = {1013--1028}
}
|
|||||
| Nussear, K. E. & Tracy, C. R. | 2007 | Can modeling improve estimation of desert tortoise population densities? [BibTeX] |
Ecological Applications 17:579--586 | ||
BibTeX:
@article{Nussear2007,
author = {Nussear, K E and Tracy, C R},
title = {Can modeling improve estimation of desert tortoise population densities?},
journal = {Ecological Applications},
year = {2007},
volume = {17},
pages = {579--586}
}
|
|||||
| O'Connell, V., Carlile, D. & Wakefield, W. | 1998 | Using line transects and habitat-based assessment techniques to estimate the density of yelloweye rockfish (Scorpaenidae: Sebastes) in the eastern Gulf of Alaska [BibTeX] |
: | ||
BibTeX:
@techreport{O’Connell1998,
author = {O'Connell, V.M. and D.W. Carlile and W.W. Wakefield},
title = {Using line transects and habitat-based assessment techniques to estimate the density of yelloweye rockfish (Scorpaenidae: Sebastes) in the eastern Gulf of Alaska},
year = {1998},
number = {CM1998/O:56}
}
|
|||||
| O'Connell, V. M. & Carlile, D. W. | 1993 | Habitat-specific density of adult yelloweye rockfish Sebastes ruberrimus in the eastern Gulf of Alaska [BibTeX] |
Fishery Bulletin 91:304--309 | ||
BibTeX:
@article{OcoCar93,
author = {O'Connell, V. M. and Carlile, D. W.},
title = {Habitat-specific density of adult yelloweye rockfish {\em {S}ebastes ruberrimus} in the eastern {G}ulf of {A}laska},
journal = {Fishery Bulletin},
year = {1993},
volume = {91},
pages = {304--309}
}
|
|||||
| O'Meara, T. E. | 1981 | A field test of two density estimators for transect data [BibTeX] |
Estimating Numbers of Terrestrial Birds :193--196 | ||
BibTeX:
@incollection{Ome81,
author = {O'Meara, T. E.},
title = {A field test of two density estimators for transect data},
booktitle = {Estimating Numbers of Terrestrial Birds},
publisher = {Cooper Ornithological Society},
year = {1981},
number = {6},
pages = {193--196}
}
|
|||||
| Ogutu, J., Bhola, N., Piepho, H.-P. & Reid, R. | 2006 | Efficiency of strip- and line-transect surveys of African savanna mammals | Journal of Zoology 269:149--160 | ||
| Abstract: Effective management and conservation of wildlife populations require reliable estimates of population size, which can be difficult and costly to obtain. We evaluated how precision in estimates of herd size and abundance varies with sample size and strip width using two field surveys and bootstrap resampling of the field data. We also examined precision under distance sampling and evaluated the cost-effectiveness of both survey techniques. Precision in estimates of abundance increased with increasing sample size and varied with strip width independently of sample size. The hazard rate key function was best for five species in two surveys with contrasting visibility conditions. Precision in density was more sensitive to the number of herds sighted than to variation in herd size and effective strip width for distance sampling. Strip counts produced lower abundance estimates but higher precision than distance sampling. We estimated that distance sampling would cost about US$3.1 km-1 of transect. Strip counts deserve serious consideration for surveys of species that occur at high densities and form large, loose agglomerations but distance methods are suitable for species occurring at moderate to low densities in areas where visibility varies substantially. Distance sampling may thus need to be supplemented by strip counts to efficiently estimate densities of rare, abundant and highly clustered multi-species assemblages of African savanna mammals. In small areas, it may often prove necessary to conduct several surveys to obtain adequate sample sizes for distance models. © 2006 The Authors. | |||||
BibTeX:
@article{Ogutu2006,
author = {Ogutu, J.O. and Bhola, N. and Piepho, H.-P. and Reid, R.},
title = {Efficiency of strip- and line-transect surveys of {A}frican savanna mammals},
journal = {Journal of Zoology},
year = {2006},
volume = {269},
pages = {149--160}
}
|
|||||
| Ogutu, J., Bhola, N. & Reid, R. | 2005 | The effects of pastoralism and protection on the density and distribution of carnivores and their prey in the Mara ecosystem of Kenya | Journal of Zoology 265:281--293 | ||
| Abstract: The overlap of large carnivores, livestock and people can engender conflicts that often threaten the future viability of carnivore populations in the pastoral systems of Africa. A playback survey of lions Panthera leo, spotted hyenas Crocuta crocuta and black-backed jackals Canis mesomelas and a transect count of wild herbivores was conducted in the Maasai Mara National Reserve and adjoining pastoral ranches to assess the effect of pastoralism and protection on the density and distribution of carnivores in June 2003. Reliability of the prey counts depended on an assumption of similar observability between the protected and pastoral areas, which we assessed using distance sampling in November 2003 and computer simulations and determined to be similar. Estimates of wild prey biomass density was 2.6 times higher in the ranches (14212 kg/km2) than in the reserve (5472 kg/km2) during this wet season count. Apparent hyena density estimates were 1.3 times higher in the ranches (0.561 hyenas/km2) than in the reserve (0.404 hyenas/km 2), in correspondence with the regional pattern of prey density. This distribution of hyenas is biased towards the reserve, if it is dependent on prey density. Estimates of apparent jackal density were similar in both areas whereas lion density was anomalously 8.0 times lower in the ranches (0.046 lions/km2) than in the reserve (0.369 lions/km2). Lion and hyena densities and prey biomass did not differ between June 1991 (5172.273 kg/km2) and June 2003 (5472 kg/km2) in the reserve, but jackal density increased in the same period. Lions never responded to playbacks in the ranches, so the potential shift in lion behavioural response for different land use zones is another potential explanation for the patterns found here. We think a real shift in lion populations is a better explanation than a behavioural change in relation to playbacks based on additional data from independent systematic and intensive censuses and playback surveys conducted in the ranches. Lion populations in the pastoral ranches seemed headed for extinction, probably owing to conflicts with pastoralism, necessitating urgent conservation interventions that integrate pastoral economic welfare with large carnivore conservation goals to foster long-term viability of lion populations in the pastoral systems. © 2005 The Zoological Society of London. | |||||
BibTeX:
@article{Ogutu2005,
author = {Ogutu, J.O. and Bhola, N. and Reid, R.},
title = {The effects of pastoralism and protection on the density and distribution of carnivores and their prey in the Mara ecosystem of Kenya},
journal = {Journal of Zoology},
year = {2005},
volume = {265},
number = {3},
pages = {281--293}
}
|
|||||
| Okamura, H., Kitakado, T., Hiramatsu, K. & Mori, M. | 2003 | Abundance estimation of diving animals by the double-platform line transect method [BibTeX] |
Biometrics 59:512--520 | ||
BibTeX:
@article{Oka03,
author = {Okamura, H and Kitakado, T and Hiramatsu, K. and Mori, M.},
title = {Abundance estimation of diving animals by the double-platform line transect method},
journal = {Biometrics},
year = {2003},
volume = {59},
pages = {512--520}
}
|
|||||
| Okamura, H., Minamikawa, S. & Kitakado, T. | 2006 | Effect of surfacing patterns on abundance estimates of long-diving animals [BibTeX] |
Fisheries Science 72:631-638 | DOI URL PDF | |
BibTeX:
@article{Okamura2006,
author = {Okamura, Hiroshi and Minamikawa, Shingo and Kitakado, Toshihide},
title = {Effect of surfacing patterns on abundance estimates of long-diving animals},
journal = {Fisheries Science},
year = {2006},
volume = {72},
pages = {631-638},
url = {http://dx.doi.org/10.1111/j.1444-2906.2006.01193.x},
doi = {10.1111/j.1444-2906.2006.01193.x}
}
|
|||||
| Olawsky, C. D. & Smith, L. M. | 1991 | Lesser prairie-chicken densities on tebuthiuron-treated and untreated sand shinnery oak rangelands [BibTeX] |
Journal of Range Management 44:364--368 | ||
BibTeX:
@article{OlaSmi91,
author = {Olawsky, C. D. and Smith, L. M.},
title = {Lesser prairie-chicken densities on tebuthiuron-treated and untreated sand shinnery oak rangelands},
journal = {Journal of Range Management},
year = {1991},
volume = {44},
pages = {364--368}
}
|
|||||
| Oleson, E. M., Calambokidis, J., Barlow, J. & Hildebrand, J. A. | 2007 | Blue whale visual and acoustic encounter rates in the Southern California Bight | Marine Mammal Science 23:574-597 | DOI URL | |
| Abstract: The relationship between blue whale (Balaenoptera musculus) visual and acoustic encounter rates was quantitatively evaluated using hourly counts of detected whales during shipboard surveys off southern California. Encounter rates were estimated using temporal, geographic, and weather variables within a generalized additive model framework. Visual encounters (2.06 animals/h, CV = 0.10) varied with subregion, Julian day, time of day, and year. Acoustic encounters of whales producing pulsed A and tonal B call sequences (song; 0.65 animals/h, CV = 0.06) varied by Julian day, survey mode (transit or stationary), and subregion, and encounters of whales producing downswept (D) calls (0.41 animals/h, CV=0.09) varied by Julian day and the number of animals seen. Inclusion of Julian day in all models reflects the seasonal occurrence of blue whales off southern California; however, the seasonal peak in visual encounters and acoustic encounters of D calling whales (July–August) was offset from the peak in acoustic encounters of singing whales (August–September). The relationship between visual and acoustic encounter rates varied regionally, with significant differences in several northern regions. The number of whales heard D calling was positively related to the number of animals seen, whereas the number of singing whales was not related to visual encounter rate. | |||||
BibTeX:
@article{Oleson2007,
author = {Oleson,Erin M. and Calambokidis,John and Barlow,Jay and Hildebrand,John A.},
title = {Blue whale visual and acoustic encounter rates in the {Southern California Bight}},
journal = {Marine Mammal Science},
year = {2007},
volume = {23},
number = {3},
pages = {574-597},
url = {http://www.blackwell-synergy.com/doi/abs/10.1111/j.1748-7692.2007.02303.x},
doi = {10.1111/j.1748-7692.2007.02303.x}
}
|
|||||
| Oliveira, P., Jones, M., Caires, D. & Menezes, D. | 1999 | Population trends and status of the Madeira Laurel Pigeon Columba trocaz | Bird Conservation International 9:387--395 | ||
| Abstract: A survey was undertaken in 1995 to assess the conservation status of the Madeira Laurel Pigeon Columba trocaz, a threatened species endemic to the Island of Madeira. The first large scale survey was carried out 1986, following the cessation of legal hunting of the species, to provide a baseline for future monitoring of population changes. The current study therefore aims to (1) compare population size with those of 1986 and (2) employ distance sampling methods (not used in 1986) to obtain estimates of population density and size. Eighteen transects (13 repeated from the 1986 survey and five new) were conducted in the four main areas of laurel forest. Pigeon numbers had increased on nearly all transects but some of the highest increases, proportionately and often numerically, were in areas with lower numbers in 1986. We estimate the current population to be 10,400 individuals, a considerable increase since 1986, probably due to a ban on hunting. As laurel forest habitat is now very well protected the Madeira Laurel Pigeon is relatively safe from extinction. | |||||
BibTeX:
@article{Oliveira1999,
author = {Oliveira, P. and Jones, M. and Caires, D. and Menezes, D.},
title = {Population trends and status of the Madeira Laurel Pigeon \textit{Columba trocaz}},
journal = {Bird Conservation International},
year = {1999},
volume = {9},
number = {4},
pages = {387--395}
}
|
|||||
| Olson, K., Fuller, T., Schaller, G., Odonkhuu, D. & Murray, M. | 2005 | Estimating the population density of Mongolian gazelles Procapra gutturosa by driving long-distance transects | ORYX 39:164--169 | ||
| Abstract: Despite a 75% reduction in the geographic range of Mongolian gazelles Procapra gutturosa over the past 50 years, the species is still recognized as the most numerous large grassland herbivore in Asia. Its actual population size, however, is still disputed, and we therefore estimated its numbers in an 80,000 km2 area in the eastern steppe of Mongolia by driving long-distance (1,200-1,400 km) transect surveys during spring and autumn 2000-2002. Quantitative estimates of gazelle numbers are essential for understanding the causes of changes in the population, and thus devising conservation strategies to assure its long-term viability. Observed herds ranged in size from 1-4,000; among surveys, median herd sizes varied from 14-42. Density estimates varied from 10.7 gazelles km-2 in spring to 11.5 gazelles km-2 in autumn, with total population estimates of 803,820 (483,790-1,330,100 95% confidence interval) and 870,625 (499,432-1,491,278 95% confidence interval), respectively. Confidence limits were wide, and to obtain a coefficient of variation of 20%, transect lengths would need to be extended three- to four-fold. Until more efficient means for conducting population surveys can be implemented, driving long-distance transects, combined with distance analysis, seem to provide the best quantitative estimate of Mongolian gazelle populations. © 2005 FFI. | |||||
BibTeX:
@article{Olson2005,
author = {Olson, K.A. and Fuller, T.K. and Schaller, G.B. and Odonkhuu, D. and Murray, M.G.},
title = {Estimating the population density of Mongolian gazelles \textit{Procapra gutturosa} by driving long-distance transects},
journal = {ORYX},
year = {2005},
volume = {39},
pages = {164--169}
}
|
|||||
| Oppel, S. | 2006 | Using distance sampling to quantify Odonata density in tropical rainforests | International Journal of Odonatology 9:81-88 | ||
| Abstract: Quantitative data are essential for many aspects of ecological research. Several methods exist to quantify odonate abundance, but complications may arise when abundances in different habitats need to be compared. In this study, I explored a technique that can overcome the variable detectability of odonates in habitats with different visibility. Distance sampling is briefly introduced and the main assumptions are listed. I conducted line transect surveys using distance sampling protocol over several weeks in a rainforest locality in Papua New Guinea to assess the usefulness of distance sampling. The results suggested that estimates of encounter rate and density of odonates are substantially higher when distance sampling is employed. Density in habitats with poor visibility, like the forest interior, is severely underestimated by traditional sampling methods, and this can lead to a misclassification of habitats. Distance sampling is a very useful technique for quantitative odonate sampling, but the sampling effort required for precise estimates is very high. For the rainforest locality in this study at least 15 months of intensive sampling would be required. Further limitations of distance sampling are discussed. |
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| Review: 1. The CV that he hopes to achieve is not only unrealistic but also misleading. Take a look at the attached file, if you paste it all into R it will show up plots of effort needed as a function of cv desired, and how something like e.g. cv 15% (still quite ambitious for usual wildlife abundance assessment) would reduce considerably the amount of effort needed. BTW, his numbers are correct, though the formula presented isn't: (L/n) should be used instead of (n/L). It is very annoying that both in the abstract and the discussion he states stuff like "For the rainforest locality in this study at least 15 months of intensive sampling would be required." without acknowledging that no one would realistically expect to achieve a 5% CV. NOTE:In the file oppel.R - in the pdf folder - are some commands that redo his calculations on effort for a given CV, showing that he chose very badly the CV to achieve. 2. I find very very strange that he keeps saying that the encounter rate estimated by distance is much larger than the one conventional methods produce - what is the encounter rate estimated by distance ? How can it be different? 3. The sentence "...ESW, defined as the width of the transect where all individuals are discovered..." is wrong, awkward and potential dangerous 4. "...habitats. It remains to be shown whether distance sampling is a robust technique that can overcome heterogenous distribution of objects within sampling units (Barry & Welsh 2001; Welsh 2002)...". I dislike this sentence, becase it ignores that it's fine if you have very heterogenous distribution of objects for each given line, say from very clustered populations, provided you have many random lines and on average over all lines a uniform dist arises. 5. I missed the point of "...Violation of a key assumption of distance sampling would lead to high bias, potentially overestimating odonate densities in the habitats under study...". It does depend on the assumption... |
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BibTeX:
@article{Oppel2006,
author = {Steffen Oppel},
title = {Using distance sampling to quantify {O}donata density in tropical rainforests},
journal = {International Journal of Odonatology},
year = {2006},
volume = {9},
pages = {81-88}
}
|
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| Ortega, Y. & Capen, D. | 1999 | Effects of forest roads on habitat quality for Ovenbirds in a forested landscape [BibTeX] |
The Auk 116:937--946 | ||
BibTeX:
@article{Ortega1999,
author = {Ortega, Y.K. and Capen, D.E.},
title = {Effects of forest roads on habitat quality for Ovenbirds in a forested landscape},
journal = {The Auk},
year = {1999},
volume = {116},
number = {4},
pages = {937--946}
}
|
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| Ortega, Y. K. & Capen, D. E. | 2002 | Roads as edges: effects on birds in forested landscapes [BibTeX] |
Forest Science 48:381--390 | ||
BibTeX:
@article{OrtCap02,
author = {Ortega, Y. K. and Capen, D. E.},
title = {Roads as edges: effects on birds in forested landscapes},
journal = {Forest Science},
year = {2002},
volume = {48},
pages = {381--390}
}
|
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| Osmek, S., Calambokidis, J. & Laake, J. L. | 1998 | Abundance and Distribution of Porpoise and Other Marine Mammals of the Inside Waters of Washington and British Columbia [BibTeX] |
: | ||
BibTeX:
@techreport{Osmek1998,
author = {Steve Osmek and John Calambokidis and Jeff L. Laake},
title = {Abundance and Distribution of Porpoise and Other Marine Mammals of the Inside Waters of Washington and British Columbia},
year = {1998}
}
|
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| Otis, D. L., McDonald, L. L. & Evans, M. A. | 1993 | Parameter Estimation in Encounter Sampling Surveys [BibTeX] |
The Journal of Wildlife Management 57:543--548 | ||
BibTeX:
@article{Otis1993,
author = {David L. Otis and Lyman L. McDonald and Marc A. Evans},
title = {Parameter Estimation in Encounter Sampling Surveys},
journal = {The Journal of Wildlife Management},
year = {1993},
volume = {57},
pages = {543--548}
}
|
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| Otten, A. & deVries, P. G. | 1984 | On line-transect estimates for population density, based on elliptic flushing curves [BibTeX] |
Biometrics 40:1145--1150 | ||
BibTeX:
@article{Ott84,
author = {Otten, A. and deVries, P. G.},
title = {On line-transect estimates for population density, based on elliptic flushing curves},
journal = {Biometrics},
year = {1984},
volume = {40},
pages = {1145--1150}
}
|
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| Otto, M. C. & Pollock, K. H. | 1990 | Size bias in line transect sampling: a field test [BibTeX] |
Biometrics 46:239--245 | ||
BibTeX:
@article{OTT90,
author = {Otto,M. C. and Pollock,K. H.},
title = {Size bias in line transect sampling: a field test},
journal = {Biometrics},
year = {1990},
volume = {46},
pages = {239--245}
}
|
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| Overton, W. S. & Davis, D. E. | 1969 | Estimating the number of animals in wildlife populations [BibTeX] |
Wildlife Management Techniques :405--55 | ||
BibTeX:
@incollection{OveDav69,
author = {Overton, W. S. and Davis, D. E.},
title = {Estimating the number of animals in wildlife populations},
booktitle = {Wildlife Management Techniques},
publisher = {The Wildlife Society},
year = {1969},
pages = {405--55}
}
|
|||||
| Owiunji, I. | 2000 | Changes in avian communities of Budongo Forest Reserve after 70 years of selective logging [BibTeX] |
Ostrich 71:216--219 | ||
BibTeX:
@article{Owi00,
author = {Owiunji, I.},
title = {Changes in avian communities of {B}udongo {F}orest {R}eserve after 70 years of selective logging},
journal = {Ostrich},
year = {2000},
volume = {71},
pages = {216--219}
}
|
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| Owiunji, I. & Plumptre, A. J. | 1998 | Bird communities in logged and unlogged compartments in Budongo Forest, Uganda. [BibTeX] |
Forest Ecology and Management 108:115--126 | ||
BibTeX:
@article{OwiPlu98,
author = {Owiunji, I. and Plumptre, A. J.},
title = {Bird communities in logged and unlogged compartments in {B}udongo {F}orest, {U}ganda.},
journal = {Forest Ecology and Management},
year = {1998},
volume = {108},
pages = {115--126}
}
|
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| Pacifici, K., Simons, T. R. & Pollock, K. H. | 2008 | Effects of vegetation and background noise on the detection process in auditory avian point-count surveys [BibTeX] |
Auk 125:600-607 | ||
BibTeX:
@article{Pacifici2008,
author = {Pacifici, K and Simons, T R and Pollock, K H},
title = {Effects of vegetation and background noise on the detection process in auditory avian point-count surveys},
journal = {Auk},
year = {2008},
volume = {125},
pages = {600-607}
}
|
|||||
| Palka, D. | 1995 | Abundance estimate of the Gulf of Maine harbor porpoise [BibTeX] |
Biology of the Phocoenids :27--50 | ||
BibTeX:
@incollection{Pal95,
author = {Palka, D.},
title = {Abundance estimate of the {G}ulf of {M}aine harbor porpoise},
booktitle = {Biology of the Phocoenids},
publisher = {International Whaling Commission},
year = {1995},
pages = {27--50}
}
|
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| Palka, D. | 1996 | Effects of Beaufort sea state on the sightability of harbor porpoises in the Gulf of Maine [BibTeX] |
Report of the International Whaling Commission 46:575--582 | ||
BibTeX:
@article{Palka1996,
author = {Palka, D},
title = {Effects of Beaufort sea state on the sightability of harbor porpoises in the Gulf of Maine},
journal = {Report of the International Whaling Commission},
year = {1996},
volume = {46},
pages = {575--582}
}
|
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| Palka, D. & Hammond, P. S. | 2001 | Accounting for responsive movement in line transect estimates of abundance [BibTeX] |
Canadian Journal of Fisheries and Aquatic Sciences 58:777--787 | URL PDF | |
BibTeX:
@article{PalHam01,
author = {Palka, D. and Hammond, P. S.},
title = {Accounting for responsive movement in line transect estimates of abundance},
journal = {Canadian Journal of Fisheries and Aquatic Sciences},
year = {2001},
volume = {58},
pages = {777--787},
url = {http://www.cetaceanbycatch.org/Papers/palka01.pdf}
}
|
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| Palka, D. & Pollard, J. | 1999 | Adaptive line transect survey for harbor porpoises [BibTeX] |
Marine Mammal Survey and Assessment Methods :3--11 | ||
BibTeX:
@incollection{PalPol99,
author = {Palka, D. and Pollard, J.},
title = {Adaptive line transect survey for harbor porpoises},
booktitle = {Marine Mammal Survey and Assessment Methods},
publisher = {Balkema},
year = {1999},
pages = {3--11}
}
|
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| Palka, D. L. | 1993 | Estimating Density of Animals when Assumptions of Line Transect Survey are Violated [BibTeX] |
: | ||
BibTeX:
@phdthesis{Pal93,
author = {Palka, D. L.},
title = {Estimating Density of Animals when Assumptions of Line Transect Survey are Violated},
school = {University of California},
year = {1993}
}
|
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| Parker, K. R. | 1979 | Density estimation by variable area transect [BibTeX] |
Journal of Wildlife Management 43:484--492 | ||
BibTeX:
@article{Par79,
author = {Parker, K. R.},
title = {Density estimation by variable area transect},
journal = {Journal of Wildlife Management},
year = {1979},
volume = {43},
pages = {484--492}
}
|
|||||
| Parmenter, C. A., Yates, T. L., Parmenter, R. R. & Dunnum, J. L. | 1999 | Statistical sensitivity for detection of spatial and temporal patterns in rodent population densities [BibTeX] |
Emerging Infectious Diseases 5:118--125 | ||
BibTeX:
@article{Parmenter1999,
author = {Cheryl A. Parmenter and Terry L. Yates and Robert R. Parmenter and Jonathan L. Dunnum},
title = {Statistical sensitivity for detection of spatial and temporal patterns in rodent population densities},
journal = {Emerging Infectious Diseases},
year = {1999},
volume = {5},
pages = {118--125}
}
|
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| Parmenter, R. R., MacMahon, J. A. & Anderson, D. R. | 1989 | Animal density estimation using a trapping web design: field validation exteriments [BibTeX] |
Ecology 70:169--179 | ||
BibTeX:
@article{Paretal89,
author = {Parmenter, R. R. and MacMahon, J. A. and Anderson, D. R.},
title = {Animal density estimation using a trapping web design: field validation exteriments},
journal = {Ecology},
year = {1989},
volume = {70},
pages = {169--179}
}
|
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| Parmenter, R. R., Yates, T. L., Anderson, D. R., Burnham, K. P., Dunnum, J. L., Franklin, A. B., Friggens, M. T., Lubow, B. C., Miller, M., Olson, G. S., Parmenter, C. A., Pollard, J., Rexstad, E., Shenk, T. M., Stanley, T. R. & White, G. C. | 2003 | Small-mammal density estimation: a field comparison of grid-based versus web-based density estimators [BibTeX] |
Ecological Monographs 73:1--26 | ||
BibTeX:
@article{Paretal03,
author = {Parmenter, R. R and Yates, T. L and Anderson, D. R and Burnham, K. P and Dunnum, J. L and Franklin, A. B and Friggens, M. T and Lubow, B. C and Miller, M and Olson, G. S and Parmenter, C. A and Pollard, J and Rexstad, E and Shenk, T. M and Stanley, T. R. and White, G. C.},
title = {Small-mammal density estimation: a field comparison of grid-based versus web-based density estimators},
journal = {Ecological Monographs},
year = {2003},
volume = {73},
pages = {1--26}
}
|
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| Parrott, D., Prickett, A., Pietravalle, S., Etherington, T. & Fletcher, M. | 2011 | Estimates of regional population densities of badger Meles meles, fox Vulpes vulpes and hare Lepus europaeus; using walked distance sampling [BibTeX] |
European Journal of Wildlife Research :1-11 | URL | |
BibTeX:
@article{springerlink:10.1007/s10344-011-0536-8,
author = {Parrott, Dave and Prickett, Anthony and Pietravalle, Stephane and Etherington, Thomas and Fletcher, Mark},
title = {Estimates of regional population densities of badger \textit{Meles meles}, fox \textit{Vulpes vulpes} and hare \textit{Lepus europaeus}; using walked distance sampling},
journal = {European Journal of Wildlife Research},
publisher = {Springer Berlin / Heidelberg},
year = {2011},
pages = {1-11},
note = {10.1007/s10344-011-0536-8},
url = {http://dx.doi.org/10.1007/s10344-011-0536-8}
}
|
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| Patil, G. P., Taillie, C. & Wigley, R. L. | 1979 | Transect sampling methods and their application to deep-sea red crab [BibTeX] |
Environmental Biomonitoring, Assessment, Prediction, and Management -- Certain Case Studies and Related Quantitative Issues :51--75 | ||
BibTeX:
@incollection{Patetal79b,
author = {Patil, G. P. and Taillie, C. and Wigley, R. L.},
title = {Transect sampling methods and their application to deep-sea red crab},
booktitle = {Environmental Biomonitoring, Assessment, Prediction, and Management --- Certain Case Studies and Related Quantitative Issues},
publisher = {International Co-operative Publishing House},
year = {1979},
pages = {51--75}
}
|
|||||
| Patil, S. A., Burnham, K. P. & Kovner, J. L. | 1979 | Nonparametric estimation of plant density by the distance method [BibTeX] |
Biometrics 35:597--604 | ||
BibTeX:
@article{Patetal79,
author = {Patil, S. A and Burnham, K. P. and Kovner, J. L.},
title = {Nonparametric estimation of plant density by the distance method},
journal = {Biometrics},
year = {1979},
volume = {35},
pages = {597--604}
}
|
|||||
| Patil, S. A., Kovner, J. L. & Burnham, K. P. | 1982 | Optimum nonparametric estimation of population density based on ordered distances [BibTeX] |
Biometrics 38:243--248 | ||
BibTeX:
@article{Pateyal82,
author = {Patil, S. A. and Kovner, J. L. and Burnham, K. P.},
title = {Optimum nonparametric estimation of population density based on ordered distances},
journal = {Biometrics},
year = {1982},
volume = {38},
pages = {243--248}
}
|
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| Patil, S. G. | 2002 | Weighted distributions [BibTeX] |
Encyclopedia of Environmetrics IV:2369--2377 | ||
BibTeX:
@incollection{Patil2002,
author = {Patil, S. G.},
title = {Weighted distributions},
booktitle = {Encyclopedia of Environmetrics},
publisher = {John Wiley and Sons},
year = {2002},
volume = {IV},
pages = {2369--2377}
}
|
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| Peak, R. G. | 2011 | A field test of the distance sampling method using Golden-cheeked Warblers [BibTeX] |
Journal of Field Ornithology 82:311--319 | DOI URL | |
BibTeX:
@article{JOFO:JOFO334,
author = {Peak, Rebecca G.},
title = {A field test of the distance sampling method using Golden-cheeked Warblers},
journal = {Journal of Field Ornithology},
publisher = {Blackwell Publishing Inc},
year = {2011},
volume = {82},
number = {3},
pages = {311--319},
url = {http://dx.doi.org/10.1111/j.1557-9263.2011.00334.x},
doi = {10.1111/j.1557-9263.2011.00334.x}
}
|
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| Peel, M. J. S. & Bothma, J. D. | 1995 | Comparison of the accuracy of four methods commonly used to count impala [BibTeX] |
South African Journal of Wildlife Research 25:41-43 | ||
BibTeX:
@article{PeeBot95,
author = {Peel, M. J. S. and Bothma, J. D.},
title = {Comparison of the accuracy of four methods commonly used to count impala},
journal = {South African Journal of Wildlife Research},
year = {1995},
volume = {25},
pages = {41-43}
}
|
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| Pelletier, L. & Krebs, C. J. | 1997 | Line transect sampling for estimating ptarmigan (Lagopus spp) density [BibTeX] |
Canadian Journal of Zoology 75:1185--1192 | ||
BibTeX:
@article{PelKre97,
author = {Pelletier, L. and Krebs, C. J.},
title = {Line transect sampling for estimating ptarmigan (\emph{L{a}gopus} spp) density},
journal = {Canadian Journal of Zoology},
year = {1997},
volume = {75},
pages = {1185--1192}
}
|
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| Peres, C. | 2001 | General guidelines for standardizing line-transect surveys of tropical forest primates [BibTeX] |
Neotropical Primates 7:11-16 | ||
BibTeX:
@article{Peres2001,
author = {Peres, C.A.},
title = {General guidelines for standardizing line-transect surveys of tropical forest primates},
journal = {Neotropical Primates},
year = {2001},
volume = {7},
pages = {11-16}
}
|
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| Peres, C. A. | 2000 | Effects of subsistence hunting on vertebrate community structure in Amazonian forests [BibTeX] |
Conservation Biology 14:240--253 | ||
BibTeX:
@article{Per00,
author = {Peres, C. A.},
title = {Effects of subsistence hunting on vertebrate community structure in {A}mazonian forests},
journal = {Conservation Biology},
year = {2000},
volume = {14},
pages = {240--253}
}
|
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| Peres, C. A. | 1997 | Effects of habitat quality and hunting pressure on arboreal folivore densities in neotropical forests: a case study of howler monkeys (Alouatta spp.) [BibTeX] |
Folia Primatologica 68:199--222 | ||
BibTeX:
@article{Per97,
author = {Peres, C. A.},
title = {Effects of habitat quality and hunting pressure on arboreal folivore densities in neotropical forests: a case study of howler monkeys (\emph{{A}louatta} spp.)},
journal = {Folia Primatologica},
year = {1997},
volume = {68},
pages = {199--222}
}
|
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| Peres, C. A. | 1997 | Primate community structure at twenty western Amazonian flooded and unflooded forests [BibTeX] |
Journal of Tropical Ecology 13:381--405 | ||
BibTeX:
@article{Per97b,
author = {Peres, C. A.},
title = {Primate community structure at twenty western {A}mazonian flooded and unflooded forests},
journal = {Journal of Tropical Ecology},
year = {1997},
volume = {13},
pages = {381--405}
}
|
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| Peres, C. A. | 1997 | Evaluating the sustainability of subsistence hunting in tropical forests [BibTeX] |
: | ||
BibTeX:
@techreport{Peres1997,
author = {Carlos A. Peres},
title = {Evaluating the sustainability of subsistence hunting in tropical forests},
year = {1997},
number = {GEC 97-22}
}
|
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| Peres, C. A. | 1996 | Population status of white-lipped Tayassu pecari and collared peccaries T. tajacu in hunted and unhunted Amazonian forests [BibTeX] |
Biological Conservation 77:115--123 | ||
BibTeX:
@article{Per96,
author = {Peres, C. A.},
title = {Population status of white-lipped \textit{Tayassu pecari} and collared peccaries \textit{T. tajacu} in hunted and unhunted {A}mazonian forests},
journal = {Biological Conservation},
year = {1996},
volume = {77},
pages = {115--123}
}
|
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| Peterhofs, E. & Priednieks, J. | 1989 | Problems in applying the line-transect method without repeated counts when the breeding season is long [BibTeX] |
Annales Zoologici Fennici 26:181--184 | ||
BibTeX:
@article{PetPri89,
author = {Peterhofs, E. and Priednieks, J.},
title = {Problems in applying the line-transect method without repeated counts when the breeding season is long},
journal = {Annales Zoologici Fennici},
year = {1989},
volume = {26},
pages = {181--184}
}
|
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| Philibert, H., Wobeser, G. & Clark, R. G. | 1993 | Counting dead birds --- examination of methods [BibTeX] |
Journal of Wildlife Diseases 29:284--289 | ||
BibTeX:
@article{Phietal93,
author = {Philibert, H. and Wobeser, G. and Clark, R. G.},
title = {Counting dead birds --- examination of methods},
journal = {Journal of Wildlife Diseases},
year = {1993},
volume = {29},
pages = {284--289}
}
|
|||||
| Pierce, B. L. | 2000 | A non-linear spotlight line transect method for estimating white-tailed deer population densities [BibTeX] |
: | ||
BibTeX:
@mastersthesis{Pie00,
author = {Pierce, B. L.},
title = {A non-linear spotlight line transect method for estimating white-tailed deer population densities},
school = {Southwest Texas State University},
year = {2000}
}
|
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| Pike, D., Gunnlaugsson, T., Víkingsson, G., Desportes, G. & Bloch, D. | 2009 | Estimates of the abundance of minke whales (Balaenoptera acutorostrata) from Faroese and Icelandic NASS shipboard surveys [BibTeX] |
NAMMCO Scientific Publications 7:81--93 | ||
BibTeX:
@article{Pike2009,
author = {Pike, D.G. and Gunnlaugsson, Th. and Víkingsson, G.A. and Desportes, G. and Bloch, D.},
title = {{Estimates of the abundance of minke whales (\textit{Balaenoptera acutorostrata}) from Faroese and Icelandic NASS shipboard surveys}},
journal = {NAMMCO Scientific Publications},
year = {2009},
volume = {7},
pages = {81--93}
}
|
|||||
| Pike, D., Víkingsson, G., Gunnlaugsson, T. & Øien, N. | 2009 | A note on the distribution and abundance of blue whales (Balaenoptera musculus) in the Central and Northeast North Atlantic [BibTeX] |
NAMMCO Scientific Publications 7:19--29 | ||
BibTeX:
@article{Pike2009a,
author = {Pike, D.G. and Víkingsson, G.A. and Gunnlaugsson, Th. and Øien, N.},
title = {{A note on the distribution and abundance of blue whales (\textit{Balaenoptera musculus}) in the Central and Northeast North Atlantic}},
journal = {NAMMCO Scientific Publications},
year = {2009},
volume = {7},
pages = {19--29}
}
|
|||||
| Pike, D. G., Paxton, C. G. M., Gunnlaugsson, T. & Víkingsson, G. A. | 2009 | Trends in the distribution and abundance of cetaceans from aerial surveys in Icelandic coastal waters, 1986-2001 [BibTeX] |
NAMMCO Scientific Publications 7:117--142 | ||
BibTeX:
@article{Pike,
author = {Pike, D. G. and C. G. M. Paxton and Th. Gunnlaugsson and G. A. Víkingsson},
title = {Trends in the distribution and abundance of cetaceans from aerial surveys in Icelandic coastal waters, 1986-2001},
journal = {NAMMCO Scientific Publications},
year = {2009},
volume = {7},
number = {SC/12/11},
pages = {117--142},
note = {Draft - DO NOT CITE WITHOUT AUTHOR'S
PERMISSION}
}
|
|||||
| Pinder, L. | 1996 | Marsh deer Blastocerus dichotomus population estimate in the Parana River, Brazil [BibTeX] |
Biological Conservation 75:87-91 | ||
BibTeX:
@article{Pin96,
author = {Pinder, L.},
title = {Marsh deer {\em {B}lastocerus dichotomus} population estimate in the {P}arana {R}iver, {B}razil},
journal = {Biological Conservation},
year = {1996},
volume = {75},
pages = {87-91}
}
|
|||||
| Pink, M., Pratt, T. C. & Fox, M. G. | 2007 | Use of Underwater Visual Distance Sampling for Estimating Habitat-Specific Population Density [BibTeX] |
North American Journal of Fisheries Management 27:246--255 | ||
BibTeX:
@article{Pink2007,
author = {Pink, M and Pratt, T C and Fox, M G},
title = {Use of Underwater Visual Distance Sampling for Estimating Habitat-Specific Population Density},
journal = {North American Journal of Fisheries Management},
year = {2007},
volume = {27},
pages = {246--255}
}
|
|||||
| Pinkowski, B. | 1990 | Performance of Fourier series in line transect simulations [BibTeX] |
Simulation 54:211--212 | ||
BibTeX:
@article{Pin90,
author = {Pinkowski, B.},
title = {Performance of Fourier series in line transect simulations},
journal = {Simulation},
year = {1990},
volume = {54},
pages = {211--212}
}
|
|||||
| Plumb, R., Knopf, F. & Anderson, S. | 2005 | Minimum population size of mountain plovers breeding in Wyoming | Wilson Bulletin 117:15--22 | ||
| Abstract: As human disturbance of natural landscapes increases, so does the need for information on declining, threatened, and potentially threatened native species. Proposed listing of the Mountain Plover (Charadrius montanus) as threatened under the U.S. Endangered Species Act in 1999 was found unwarranted in 2003, but this species remains of special concern to management agencies and conservation groups. Whereas large concentrations of breeding Mountain Plovers occur in Montana and Colorado, estimates of the numbers of Mountain Plovers in Wyoming have ranged from only 500 to 1,500 individuals and are based largely on conjecture. In 2002, we visited all known breeding locales in the state to define areas of concentrated sightings in the Laramie, Shirley, Washakie, Great Divide, and Big Horn basins. In 2003, we used distance sampling to estimate breeding bird densities in these five areas. We pooled these estimates and applied the resulting density to a minimum occupied range for the Mountain Plover based on the documented sightings and a previously derived home-range size of 56.6 ha ± 21.5 (SD) to generate a minimum population estimate for the state. Average Mountain Plover density was 4.47 ± 0.55 (SE) birds/km2. We calculated a minimum population estimate of 3,393 birds for Wyoming. The Mountain Plover population breeding in Wyoming appears to contribute substantially to a revised continental population estimate of 11,000 to 14,000 birds. Our approach may have applications to quantifying minimum population status of other uncommon species or species of special conservation concern using current database records, such as those compiled in Natural Heritage Programs at the state level. | |||||
BibTeX:
@article{Plumb2005,
author = {Plumb, R.E. and Knopf, F.L. and Anderson, S.H.},
title = {Minimum population size of mountain plovers breeding in Wyoming},
journal = {Wilson Bulletin},
year = {2005},
volume = {117},
number = {1},
pages = {15--22}
}
|
|||||
| Plumptre, A. J. | 2000 | Monitoring mammal populations with line transect techniques in African forests [BibTeX] |
Journal of Applied Ecology 37:356--368 | ||
BibTeX:
@article{Plu00,
author = {Plumptre, A. J.},
title = {Monitoring mammal populations with line transect techniques in {A}frican forests},
journal = {Journal of Applied Ecology},
year = {2000},
volume = {37},
pages = {356--368}
}
|
|||||
| Plumptre, A. J. & Cox, D. | 2006 | Counting primates for conservation: primate surveys in Uganda [BibTeX] |
Primates 47:65--73 | ||
BibTeX:
@article{Plumptre2006,
author = {Andrew J. Plumptre and Debby Cox},
title = {Counting primates for conservation: primate surveys in Uganda},
journal = {Primates},
year = {2006},
volume = {47},
pages = {65--73}
}
|
|||||
| Plumptre, A. J. & Harris, S. | 1995 | Estimating the biomass of large mammalian herbivores in a tropical montane forest --- a method of fecal counting that avoids assuming a steady-state system [BibTeX] |
Journal of Applied Ecology 32:111--120 | ||
BibTeX:
@article{PluHar95,
author = {Plumptre, A. J. and Harris, S.},
title = {Estimating the biomass of large mammalian herbivores in a tropical montane forest --- a method of fecal counting that avoids assuming a steady-state system},
journal = {Journal of Applied Ecology},
year = {1995},
volume = {32},
pages = {111--120}
}
|
|||||
| Plumptre, A. J. & Reynolds, V. | 1997 | Nesting behavior of chimpanzees: implications for censuses [BibTeX] |
International Journal of Primatology 18:475--485 | ||
BibTeX:
@article{PlyRey97,
author = {Plumptre, A. J. and Reynolds, V.},
title = {Nesting behavior of chimpanzees: implications for censuses},
journal = {International Journal of Primatology},
year = {1997},
volume = {18},
pages = {475--485}
}
|
|||||
| Plumptre, A. J. & Reynolds, V. | 1996 | Censusing chimpanzees in the Budongo Forest, Uganda [BibTeX] |
International Journal of Primatology 17:85--99 | ||
BibTeX:
@article{PluRey96,
author = {Plumptre, A. J. and Reynolds, V.},
title = {Censusing chimpanzees in the {B}udongo {F}orest, {U}ganda},
journal = {International Journal of Primatology},
year = {1996},
volume = {17},
pages = {85--99}
}
|
|||||
| Plumptre, A. J. & Reynolds, V. | 1994 | The effect of selective logging on the primate populations in the Budongo Forest Reserve, Uganda [BibTeX] |
Journal of Applied Ecology 31:631--641 | ||
BibTeX:
@article{PluRey94,
author = {Plumptre, A. J. and Reynolds, V.},
title = {The effect of selective logging on the primate populations in the {B}udongo {F}orest {R}eserve, {U}ganda},
journal = {Journal of Applied Ecology},
year = {1994},
volume = {31},
pages = {631--641}
}
|
|||||
| Pocewicz, A., Morgan, P. & Eigenbrode, S. D. | 2009 | Local and landscape effects on butterfly density in northern Idaho grasslands and forests | Journal of Insect Conservation 13:593--601 | ||
| Abstract: Understanding butterfly response to landscape context can inform conservation management and planning. We tested whether local-scale resources (host and nectar plants, canopy cover) or landscape context, measured at two scales, better explained the densities of four butterfly species. The density of Coenonympha tullia, which has host plants strongly associated with grassland habitats, was positively correlated with the amount of grassland in 0.5- and 1-km radius landscapes and only occurred in forests when they bordered grasslands. For the other species, Celastrina ladon, Cupido amyntula, and Vanessa cardui, local-scale resources better explained butterfly densities, emphasizing the importance of local habitat quality for butterflies. These three species also used host plants that were distributed more heterogeneously within and among habitat types. Our findings demonstrate the importance of host plant spatial distributions when determining the scale at which butterfly density relates to resources, and we recommend that both these distributions and landscape context be evaluated when developing butterfly monitoring programs, managing for species of concern, or modeling potential habitat | |||||
BibTeX:
@article{Pocewicz2009,
author = {Amy Pocewicz and Penelope Morgan and Sanford D. Eigenbrode},
title = {Local and landscape effects on butterfly density in northern Idaho grasslands and forests},
journal = {Journal of Insect Conservation},
year = {2009},
volume = {13},
pages = {593--601}
}
|
|||||
| Pojar, T. M., Bowden, D. C. & Gill, R. B. | 1995 | Aerial counting experiments to estimate pronghorn density and herd structure [BibTeX] |
Journal of Wildlife Management 59:117--28 | ||
BibTeX:
@article{Pojetal95,
author = {Pojar, T. M. and Bowden, D. C. and Gill, R. B.},
title = {Aerial counting experiments to estimate pronghorn density and herd structure},
journal = {Journal of Wildlife Management},
year = {1995},
volume = {59},
pages = {117--28}
}
|
|||||
| Pollard, J. H. | 2002 | Adaptive Distance Sampling [BibTeX] |
: | ||
BibTeX:
@phdthesis{Pol02,
author = {Pollard, J. H.},
title = {Adaptive Distance Sampling},
school = {University of St Andrews},
year = {2002}
}
|
|||||
| Pollard, J. H. | 1971 | On distance estimators of density in randomly distributed forests [BibTeX] |
Biometrics 27:991--1002 | ||
BibTeX:
@article{Pol71,
author = {Pollard, J. H.},
title = {On distance estimators of density in randomly distributed forests},
journal = {Biometrics},
year = {1971},
volume = {27},
pages = {991--1002}
}
|
|||||
| Pollard, J. H. & Buckland, S. T. | 1997 | A strategy for adaptive sampling in shipboard line transect surveys [BibTeX] |
Report of the International Whaling Commission 47:921--931 | ||
BibTeX:
@article{PolBuc97,
author = {Pollard, J. H. and Buckland, S. T.},
title = {A strategy for adaptive sampling in shipboard line transect surveys},
journal = {Report of the International Whaling Commission},
year = {1997},
volume = {47},
pages = {921--931}
}
|
|||||
| Pollard, J. H., Palka, D. & Buckland, S. T. | 2002 | Adaptive line transect sampling [BibTeX] |
Biometrics 58:862--870 | ||
BibTeX:
@article{Poletal02,
author = {Pollard, J. H and Palka, D. and Buckland, S. T.},
title = {Adaptive line transect sampling},
journal = {Biometrics},
year = {2002},
volume = {58},
pages = {862--870}
}
|
|||||
| Pollock, K., Marsh, H., Lawler, I. & Alldredge, M. | 2006 | Estimating animal abundance in heterogeneous environments: an application to aerial surveys for dugongs [BibTeX] |
Journal of Wildlife Management 70:255--262 | ||
BibTeX:
@article{Pollock2006,
author = {Pollock, K.H. and Marsh, H.D. and Lawler, I.R. and Alldredge, M.W.},
title = {Estimating animal abundance in heterogeneous environments: an application to aerial surveys for dugongs},
journal = {Journal of Wildlife Management},
year = {2006},
volume = {70},
pages = {255--262}
}
|
|||||
| Pollock, K. H. | 1978 | A family of density estimators for line-transect sampling [BibTeX] |
Biometrics 34:475--478 | ||
BibTeX:
@article{Pol78,
author = {Pollock, K. H.},
title = {A family of density estimators for line-transect sampling},
journal = {Biometrics},
year = {1978},
volume = {34},
pages = {475--478}
}
|
|||||
| Pollock, K. H. & Kendall, W. L. | 1987 | Visibility bias in aerial surveys: a review of estimation procedures [BibTeX] |
Journal of Wildlife Management 51:502--510 | ||
BibTeX:
@article{PolKen87,
author = {Pollock, K. H. and Kendall, W. L.},
title = {Visibility bias in aerial surveys: a review of estimation procedures},
journal = {Journal of Wildlife Management},
year = {1987},
volume = {51},
pages = {502--510}
}
|
|||||
| Pollock, K. H., Nichols, J. D., Simons, T. R., Farnsworth, G. L., Bailey, L. L. & Sauer, J. R. | 2002 | Large scale wildlife monitoring studies: statistical methods for design and analysis [BibTeX] |
Environmetrics 13:105--119 | ||
BibTeX:
@article{Poletal2002,
author = {Pollock, K. H. and Nichols, J. D. and Simons, T. R. and Farnsworth, G. L. and Bailey, L. L. and Sauer, J. R.},
title = {Large scale wildlife monitoring studies: statistical methods for design and analysis},
journal = {Environmetrics},
year = {2002},
volume = {13},
pages = {105--119}
}
|
|||||
| Pontes, A. R. M. | 1999 | Environmental determinants of primate abundance in Maraca Island, Roraima, Brazilian Amazonia [BibTeX] |
Journal of Zoology 247:189--199 | ||
BibTeX:
@article{Pon99,
author = {Pontes, A. R. M.},
title = {Environmental determinants of primate abundance in {M}araca {I}sland, {R}oraima, {B}razilian {A}mazonia},
journal = {Journal of Zoology},
year = {1999},
volume = {247},
pages = {189--199}
}
|
|||||
| Popgeorgiev, G. | 2008 | The effects of a large-scale fire on the demographic structure of a population of Hermann’s (Testudo hermanni boettgeri Mojsisovics, 1889) and Spur-thighed (Testudo graeca ibera Pallas, 1814) tortoises in Eastern Rhodopes Mountains, Bulgaria [BibTeX] |
Historia naturalis bulgarica 19:115--127 | ||
BibTeX:
@article{Popgeorgiev2008,
author = {Georgi Popgeorgiev},
title = {The effects of a large-scale fire on the demographic structure of a population of {Hermann’s (\textit{Testudo hermanni boettgeri} Mojsisovics, 1889) and Spur-thighed (\textit{Testudo graeca ibera} Pallas, 1814) tortoises in Eastern Rhodopes Mountains, Bulgaria}},
journal = {Historia naturalis bulgarica},
year = {2008},
volume = {19},
pages = {115--127}
}
|
|||||
| Pople, A. R., Cairns, S. C., Clancy, T. F., Grigg, G. C., Beard, L. A. & Southwell, C. J. | 1998 | An assessment of the accuracy of kangaroo surveys using fixed-wing aircraft [BibTeX] |
Wildlife Research 25:315--326 | ||
BibTeX:
@article{Pople1998,
author = {A. R. Pople and S. C. Cairns and T. F. Clancy and G. C. Grigg and L. A. Beard and C. J. Southwell},
title = {An assessment of the accuracy of kangaroo surveys using fixed-wing aircraft},
journal = {Wildlife Research},
year = {1998},
volume = {25},
pages = {315--326}
}
|
|||||
| Porteus, T., Richardson, S. & Reynolds, J. | 2011 | The importance of survey design in distance sampling: a field evaluation using domestic sheep [BibTeX] |
Wildlife Biology 38:221--234 | ||
BibTeX:
@article{Porteusinpress,
author = {Tom Porteus and Suzanne Richardson and Jonathan Reynolds},
title = {The importance of survey design in distance sampling: a field evaluation using domestic sheep},
journal = {Wildlife Biology},
year = {2011},
volume = {38},
pages = {221--234}
}
|
|||||
| Powell, A. F. L. A., Busby, W. H. & Kindscher, K. | 2007 | Status of the regal fritillary (Speyeria idalia) and effects of fire management on its abundance in northeastern Kansas, USA [BibTeX] |
Journal of Insect Conservation 11:299 - 308 | ||
BibTeX:
@article{Powell2006,
author = {Alexis F. L. A. Powell and William H. Busby and Kelly Kindscher},
title = {Status of the regal fritillary (\textit{Speyeria idalia}) and effects of fire management on its abundance in northeastern Kansas, USA},
journal = {Journal of Insect Conservation},
year = {2007},
volume = {11},
pages = {299 - 308}
}
|
|||||
| Powell, L. A. | 2007 | Approximating variance of demographic parameters using the delta method: a reference for avian biologists. [BibTeX] |
The Condor 109:949--954 | ||
BibTeX:
@article{Powell2007,
author = {Powell, L. A.},
title = {Approximating variance of demographic parameters using the delta method: a reference for avian biologists.},
journal = {The Condor},
year = {2007},
volume = {109},
pages = {949--954}
}
|
|||||
| Powell, L. A., Lang, J. D., Conroy, M. J. & Krementz, D. G. | 2000 | Effects of Forest Management on Density, Survival, and Population Growth of Wood Thrushes | The Journal of Wildlife Management 64:11--23 | ||
| Abstract: Loss and alteration of breeding habitat have been proposed as causes of declines in several Neotropical migrant bird populations. We conducted a 4-year study to determine the effects of winter prescribed burning and forest thinning on breeding wood thrush (Hylocichla mustelina) populations at the Piedmont National Wildlife Refuge (PNWR) in Georgia. We estimated density, adult and juvenile survival rates, and apparent annual survival using transect surveys, radiotelemetry, and mist netting. Burning and thinning did not cause lower densities (P = 0.25); wood thrush density ranged from 0.15 to 1.30 pairs/10 ha. No radiomarked male wood thrushes (n = 68) died during the 4 years, but female weekly survival was 0.981 ± 0.014 (SE) for females (n = 63) and 0.976 ± 0.010 for juveniles (n = 38). Apparent annual adult survival was 0.579 (SE = 0.173). Thinning and prescribed burning did not reduce adult or juvenile survival during the breeding season or apparent annual adult survival. Annual population growth (λ) at PNWR was 1.00 (95% confidence interval [CI] = 0.32-1.63), and the considerable uncertainty in this prediction underscores the need for long-term monitoring to effectively manage Neotropical migrants. Population growth increased on experimental compartments after the burn and thin (95% CI before = 0.91-0.97, after = 0.98-1.05), while control compartment λ declined (before = 0.98-1.05, after = 0.87-0.92). We found no evidence that the current management regime at PNWR, designed to improve red-cockaded woodpecker (Picoides borealis) habitat, negatively affected wood thrushes. | |||||
BibTeX:
@article{PowellJWM2000,
author = {Larkin A. Powell and Jason D. Lang and Michael J. Conroy and David G. Krementz},
title = {Effects of Forest Management on Density, Survival, and Population Growth of Wood Thrushes},
journal = {The Journal of Wildlife Management},
year = {2000},
volume = {64},
number = {1},
pages = {11--23}
}
|
|||||
| Powlesland, R. G. & Barraclough, R. K. | 2001 | Proceedings of a workshop on distance sampling, Wellington, May 2000 [BibTeX] |
: | ||
BibTeX:
@techreport{Powlesland2001,
author = {R G Powlesland and Barraclough, R. K.},
title = {Proceedings of a workshop on distance sampling, Wellington, May 2000},
year = {2001},
number = {175}
}
|
|||||
| Puertas, P. & Bodmer, R. E. | 1993 | Conservation of a high diversity primate assemblage [BibTeX] |
Biodiversity and Conservation 2:586--93 | ||
BibTeX:
@article{PueBod93,
author = {Puertas, P. and Bodmer, R. E.},
title = {Conservation of a high diversity primate assemblage},
journal = {Biodiversity and Conservation},
year = {1993},
volume = {2},
pages = {586--93}
}
|
|||||
| Pyke, G. & Recher, H. | 1985 | Estimated forest bird densities by variable distance point counts [BibTeX] |
Australian Wildlife Research 12:307--319 | ||
BibTeX:
@article{Pyke1985,
author = {Pyke, GH and Recher, HF},
title = {Estimated forest bird densities by variable distance point counts},
journal = {Australian Wildlife Research},
year = {1985},
volume = {12},
pages = {307--319}
}
|
|||||
| Pérez, J., Granados, J., Soriguers, R., Fandos, P., Marquez, F. & Crampe, J. | 2002 | Distribution, status and conservation problems of the Spanish Ibex, Capra pyrenaica (Mammalia: Artiodactyla) | Mammal Rev. 32:26--39 | ||
| Abstract: In this paper, the distribution and status of the Spanish Ibex, Capra pyrenaica (Mammalia: Artiodactyla), are revised. The whole Iberian population numbers nearly 50 000, distributed in more than 50 nuclei, and has generally increased during the last decades. Nevertheless, within this wider context, different conditions apply to different populations, including recent extinction (the Pyrenean population), recovery from recent severe epizooty of sarcoptic mange (e.g. the Sierras de Cazorla and Segura y Las Villas range population) and populations at high densities (e.g. Gredos mountain range and Sierra de Grazalema Natural Park, among others). The main factors affecting the conservation of this species are also reported and discussed. On the basis of current information we propose the status of 'vulnerable' for the Spanish Ibex. | |||||
BibTeX:
@article{Peretal02,
author = {P{\'e}rez, J.M. and Granados, J.E. and Soriguers, R.C. and Fandos, P. and Marquez, F.J. and Crampe, J.P.},
title = {Distribution, status and conservation problems of the Spanish Ibex, Capra pyrenaica (Mammalia: Artiodactyla)},
journal = {Mammal Rev.},
year = {2002},
volume = {32},
number = {1},
pages = {26--39}
}
|
|||||
| Pérez, J., Serrano, E., Alpizar-Jara, R., Granados, J. & Soriguer, R. | 2002 | The potential of distance sampling methods to estimate abundance of mountain ungulates: Review of usefulness and limitations | Pirineos 157:15--23 | ||
| Abstract: Accurate assesment of the populations of mountain ungulates is difficult. Topography and behaviour of animals are important factors influencing detectability, on which direct methods are based. Sympathry with other wild and domestic ungulates increases error of dung identification. Other factors, such as the size of the area to be surveyed, or unmarked populations of the target species, suggests the choice of curvilinear transects. If the basic assumptions of Distance Sampling methodology are met, then estimates of population density and accuracy can be obtained. Current technology (GPS, laser rangefinders, and G.I.S.) can be used to achieve accurate measurements of distances and angles. A crucial problem is to estimate the effective area sampled around each travelling path. Therefore, researchers and managers of mountain ungulates need an adaptation of Distance Sampling methodology to account for a tridimensional scenario imposed by the slope of mountains. There is also a requirement to standardize protocols for collecting data. Alternatives for design surveys and collection data when working with populations of mountain ungulates are discussed. | |||||
| Review: Cita Chen | |||||
BibTeX:
@article{Peretal02b,
author = {P{\'e}rez, J.M. and Serrano, E. and Alpizar-Jara, R. and Granados, J.E. and Soriguer, R.C.},
title = {The potential of distance sampling methods to estimate abundance of mountain ungulates: Review of usefulness and limitations},
journal = {Pirineos},
year = {2002},
volume = {157},
pages = {15--23}
}
|
|||||
| Pérez, J. M., Granados, J. E. & Soriguer, R. C. | 1994 | Population dynamic of the Spanish ibex Capra pyrenaica in Sierra Nevada Natural Park (southern Spain) [BibTeX] |
Acta Theriologica 39:289--94 | ||
BibTeX:
@article{Peretal94,
author = {P{\'e}rez, J. M. and Granados, J. E. and Soriguer, R. C.},
title = {Population dynamic of the {S}panish ibex \emph{{C}apra pyrenaica} in {S}ierra {N}evada {N}atural {P}ark (southern {S}pain)},
journal = {Acta Theriologica},
year = {1994},
volume = {39},
pages = {289--94}
}
|
|||||
| Quang, P. X. | 1993 | Nonparametric estimators for variable circular plot surveys [BibTeX] |
Biometrics 49:837--852 | ||
BibTeX:
@article{Qua93,
author = {Quang, P. X.},
title = {Nonparametric estimators for variable circular plot surveys},
journal = {Biometrics},
year = {1993},
volume = {49},
pages = {837--852}
}
|
|||||
| Quang, P. X. | 1991 | A nonparametric approach to size-biased line transect sampling [BibTeX] |
Biometrics 47:269--279 | ||
BibTeX:
@article{QUA91,
author = {Quang, P. X.},
title = {A nonparametric approach to size-biased line transect sampling},
journal = {Biometrics},
year = {1991},
volume = {47},
pages = {269--279}
}
|
|||||
| Quang, P. X. | 1990 | Confidence intervals for densities in line transect sampling [BibTeX] |
Biometrics 46:459--472 | ||
BibTeX:
@article{Qua90,
author = {Quang, P. X.},
title = {Confidence intervals for densities in line transect sampling},
journal = {Biometrics},
year = {1990},
volume = {46},
pages = {459--472}
}
|
|||||
| Quang, P. X. & Becker, E. | 1997 | Combining line transect and double count sampling techniques for aerial surveys [BibTeX] |
Journal of Agricultural, Biological and Environmental Statistics 2:1--20 | ||
BibTeX:
@article{QUA97,
author = {Quang, P. X. and Becker, E.},
title = {Combining line transect and double count sampling techniques for aerial surveys},
journal = {Journal of Agricultural, Biological and Environmental Statistics},
year = {1997},
volume = {2},
pages = {1--20}
}
|
|||||
| Quang, P. X. & Becker, E. F. | 1999 | Aerial survey sampling of contour transects using double-count and covariate data [BibTeX] |
Marine Mammal Survey and Assessment Methods :87--97 | ||
BibTeX:
@incollection{QuaBec99,
author = {Quang, P. X. and Becker, E. F.},
title = {Aerial survey sampling of contour transects using double-count and covariate data},
booktitle = {Marine Mammal Survey and Assessment Methods},
publisher = {Balkema},
year = {1999},
pages = {87--97}
}
|
|||||
| Quang, P. X. & Becker, E. F. | 1996 | Line transect sampling under varying conditions with application to aerial surveys [BibTeX] |
Ecology 77:1297--1302 | ||
BibTeX:
@article{QuaBec96,
author = {Quang, P. X. and Becker, E. F.},
title = {Line transect sampling under varying conditions with application to aerial surveys},
journal = {Ecology},
year = {1996},
volume = {77},
pages = {1297--1302}
}
|
|||||
| Quang, P. X. & Lanctot, R. B. | 1991 | A line transect model for aerial surveys [BibTeX] |
Biometrics 47:1089--1102 | ||
BibTeX:
@article{QuaLan91,
author = {Quang, P. X. and Lanctot, R. B.},
title = {A line transect model for aerial surveys},
journal = {Biometrics},
year = {1991},
volume = {47},
pages = {1089--1102}
}
|
|||||
| Quinn, II, T. J. | 1979 | The effects of school structure on line transect estimators of abundance [BibTeX] |
Contemporary Quantitative Ecology and Related Ecometrics :473--491 | ||
BibTeX:
@incollection{Qui79,
author = {Quinn, II, T. J.},
title = {The effects of school structure on line transect estimators of abundance},
booktitle = {Contemporary Quantitative Ecology and Related Ecometrics},
publisher = {International Co-operative Publishing House},
year = {1979},
pages = {473--491}
}
|
|||||
| Quinn, II, T. J. | 1985 | Line transect estimators for school populations [BibTeX] |
Fisheries Research 3:183--199 | ||
BibTeX:
@article{Qui85,
author = {Quinn, II, T. J.},
title = {Line transect estimators for school populations},
journal = {Fisheries Research},
year = {1985},
volume = {3},
pages = {183--199}
}
|
|||||
| Quinn, II, T. J. | 1977 | The effects of aggregation on line transect estimators of population abundance with application to marine mammal populations [BibTeX] |
: | ||
BibTeX:
@mastersthesis{Qui77,
author = {Quinn, II, T. J.},
title = {The effects of aggregation on line transect estimators of population abundance with application to marine mammal populations},
school = {University of Washington},
year = {1977},
number = {WA, USA, 116 pp.}
}
|
|||||
| Quinn, T. J., I. & Gallucci, V. F. | 1980 | Parametric models for line transect estimators of abundance [BibTeX] |
Ecology 61:293--302 | ||
BibTeX:
@article{QuiGal80,
author = {Quinn, T. J., II and Gallucci, V. F.},
title = {Parametric models for line transect estimators of abundance},
journal = {Ecology},
year = {1980},
volume = {61},
pages = {293--302}
}
|
|||||
| Rabaça, J. E. | 1995 | Métodos de censos de aves: aspectos gerais, pressupostos e principios de aplicação [BibTeX] |
: | ||
BibTeX:
@book{Rabaca1995,
author = {João Eduardo Rabaça},
title = {Métodos de censos de aves: aspectos gerais, pressupostos e principios de aplicação},
publisher = {SPEA},
year = {1995}
}
|
|||||
| Raftery, A. E. & Schweder, T. | 1993 | Inference about the ratio of two parameters, with application to whale censusing [BibTeX] |
American Statistician 47:259--264 | ||
BibTeX:
@article{RafSch93,
author = {Raftery, A. E. and Schweder, T.},
title = {Inference about the ratio of two parameters, with application to whale censusing},
journal = {American Statistician},
year = {1993},
volume = {47},
pages = {259--264}
}
|
|||||
| Ralph, C. J. | 1981 | An investigation of the effect of seasonal activity levels on avian censusing [BibTeX] |
Estimating Numbers of Terrestrial Birds :265--270 | ||
BibTeX:
@incollection{Ral81,
author = {Ralph, C. J.},
title = {An investigation of the effect of seasonal activity levels on avian censusing},
booktitle = {Estimating Numbers of Terrestrial Birds},
publisher = {Cooper Ornithological Society},
year = {1981},
number = {6},
pages = {265--270}
}
|
|||||
| Raman, T. R. S. | 2003 | Assessment of census techniques for interspecific comparisons of tropical rainforest bird densities: a field evaluation in the Western Ghats, India [BibTeX] |
Ibis 145:9--21 | ||
BibTeX:
@article{Raman2003,
author = {T. R. Shankar Raman},
title = {Assessment of census techniques for interspecific comparisons of tropical rainforest bird densities: a field evaluation in the {Western Ghats, India}},
journal = {Ibis},
year = {2003},
volume = {145},
pages = {9--21}
}
|
|||||
| Ramsey, F. L. | 1981 | Introductory remarks: data analysis [BibTeX] |
Estimating Numbers of Terrestrial Birds :454 | ||
BibTeX:
@incollection{Ram81,
author = {Ramsey, F. L.},
title = {Introductory remarks: data analysis},
booktitle = {Estimating Numbers of Terrestrial Birds},
publisher = {Cooper Ornithological Society},
year = {1981},
number = {6},
pages = {454}
}
|
|||||
| Ramsey, F. L. | 1979 | Parametric models for line transect surveys [BibTeX] |
Biometrika 66:505--512 | ||
BibTeX:
@article{Ram79,
author = {Ramsey, F. L.},
title = {Parametric models for line transect surveys},
journal = {Biometrika},
year = {1979},
volume = {66},
pages = {505--512}
}
|
|||||
| Ramsey, F. L., Gates, C. E., Patil, G. P. & Taillie, C. | 1988 | On transect sampling to assess wildlife populations and marine resources [BibTeX] |
Handbook of Statistics 6: Sampling :515--32 | ||
BibTeX:
@incollection{Rametal88,
author = {Ramsey, F. L. and Gates, C. E. and Patil, G. P. and Taillie, C.},
title = {On transect sampling to assess wildlife populations and marine resources},
booktitle = {Handbook of Statistics 6: Sampling},
publisher = {Elsevier Publishers},
year = {1988},
pages = {515--32}
}
|
|||||
| Ramsey, F. L. & Harrison, K. | 2004 | A closer look at detectability | Environmental and Ecological Statistics 11:73--84 | ||
| Abstract: The theory underlying line transect and variable circular plot surveys-distance sampling-begins with an assumed detectability function, giving the probabilities of detecting animals at different distances from the observer's path. The nature of these probabilities is unspecified in the general development, leaving users to question whether the actual probability structure matters. In particular, may one use the methodology in surveys where animals at the same distance have different probabilities of detection? This paper presents three examples where probabilities come from different assumptions: from the random placement of transects; from the uniform distribution of animals over the study region; and from cues randomly detected by the observer. These exemplify situations where detectability may not be a function of distance alone. Horvitz-Thompson estimators are displayed which can be used in each example, but some estimators require measuring features other than distance. A result concerning optimally weighted Horvitz-Thompson estimators shows that all three can be brought under the same umbrella if detection areas are measured instead of detection distances and if animals are uniformly distributed. © 2004 Kluwer Academic Publishers. | |||||
BibTeX:
@article{Ramsey2004,
author = {Ramsey, F. L. and Harrison, K.},
title = {A closer look at detectability},
journal = {Environmental and Ecological Statistics},
year = {2004},
volume = {11},
number = {1},
pages = {73--84}
}
|
|||||
| Ramsey, F. L. & Scott, J. M. | 1979 | Estimating population densities from variable circular plot surveys [BibTeX] |
Sampling Biological Populations :155--181 | ||
BibTeX:
@incollection{RamSco79,
author = {Ramsey, F. L. and Scott, J. M.},
title = {Estimating population densities from variable circular plot surveys},
booktitle = {Sampling Biological Populations},
publisher = {International Co-operative Publishing House},
year = {1979},
pages = {155--181}
}
|
|||||
| Ramsey, F. L. & Scott, J. M. | 1981 | Tests of hearing ability [BibTeX] |
Estimating Numbers of Terrestrial Birds :341--345 | ||
BibTeX:
@incollection{RamSco81,
author = {Ramsey, F. L. and Scott, J. M.},
title = {Tests of hearing ability},
booktitle = {Estimating Numbers of Terrestrial Birds},
publisher = {Cooper Ornithological Society},
year = {1981},
number = {6},
pages = {341--345}
}
|
|||||
| Ramsey, F. L. & Scott, J. M. | 1981 | Analysis of bird survey data using a modification of Emlen's methods [BibTeX] |
Estimating Numbers of Terrestrial Birds :483--487 | ||
BibTeX:
@incollection{RamSco81b,
author = {Ramsey, F. L. and Scott, J. M.},
title = {Analysis of bird survey data using a modification of {E}mlen's methods},
booktitle = {Estimating Numbers of Terrestrial Birds},
publisher = {Cooper Ornithological Society},
year = {1981},
number = {6},
pages = {483--487}
}
|
|||||
| Ramsey, F. L. & Scott, J. M. | 1978 | Use of circular plot surveys in estimating the density of a population with Poisson scattering [BibTeX] |
: | ||
BibTeX:
@techreport{RamSco78,
author = {Ramsey, F. L. and Scott, J. M.},
title = {Use of circular plot surveys in estimating the density of a population with {P}oisson scattering},
year = {1978},
number = {Technical Report 60}
}
|
|||||
| Ramsey, F. L., Scott, J. M. & Clark, R. T. | 1979 | Statistical problems arising from surveys of rare and endangered forest birds [BibTeX] |
Proceedings of the 42nd Session of the International Statistical Institute :471--83 | ||
BibTeX:
@article{Rametal79,
author = {Ramsey, F. L. and Scott, J. M. and Clark, R. T.},
title = {Statistical problems arising from surveys of rare and endangered forest birds},
journal = {Proceedings of the 42nd Session of the International Statistical Institute},
year = {1979},
pages = {471--83}
}
|
|||||
| Ramsey, F. L., Wildman, V. & Engbring, J. | 1987 | Covariate adjustments to effective area in variable-area wildlife surveys [BibTeX] |
Biometrics 43:1--11 | ||
BibTeX:
@article{Rametal87,
author = {Ramsey, F. L and Wildman, V. and Engbring, J.},
title = {Covariate adjustments to effective area in variable-area wildlife surveys},
journal = {Biometrics},
year = {1987},
volume = {43},
pages = {1--11}
}
|
|||||
| Ransom, D. & Pinchak, W. E. | 2003 | Assessing Accuracy of a Laser Rangefinder in Estimating Grassland Bird Density [BibTeX] |
Wildlife Society Bulletin 31:460--463 | ||
BibTeX:
@article{RansomWSB2003,
author = {Dean Ransom and William E. Pinchak},
title = {Assessing Accuracy of a Laser Rangefinder in Estimating Grassland Bird Density},
journal = {Wildlife Society Bulletin},
year = {2003},
volume = {31},
pages = {460--463}
}
|
|||||
| Ransom, J. | 2011 | Customizing a rangefinder for community-based wildlife conservation initiatives [BibTeX] |
Biodiversity and Conservation 20:1603-1609 | URL | |
BibTeX:
@article{springerlink:10.1007/s10531-011-0040-1,
author = {Ransom, Jason},
title = {Customizing a rangefinder for community-based wildlife conservation initiatives},
journal = {Biodiversity and Conservation},
publisher = {Springer Netherlands},
year = {2011},
volume = {20},
pages = {1603-1609},
note = {10.1007/s10531-011-0040-1},
url = {http://dx.doi.org/10.1007/s10531-011-0040-1}
}
|
|||||
| Rao, P. V. | 1984 | Density estimation based on line transect samples [BibTeX] |
Statistics and Probability Letters 2:1--57 | ||
BibTeX:
@article{Rao84,
author = {Rao, P. V.},
title = {Density estimation based on line transect samples},
journal = {Statistics and Probability Letters},
year = {1984},
volume = {2},
pages = {1--57}
}
|
|||||
| Rao, P. V. & Portier, K. M. | 1985 | A model for line transect sampling clustered populations [BibTeX] |
Statistics and Probability Letters 3:89--93 | ||
BibTeX:
@article{RaoPor85,
author = {Rao, P. V. and Portier, K. M.},
title = {A model for line transect sampling clustered populations},
journal = {Statistics and Probability Letters},
year = {1985},
volume = {3},
pages = {89--93}
}
|
|||||
| Rao, P. V., P. K. M. & Ondrasik, J. A. | 1981 | Density estimation using line transect sampling [BibTeX] |
Estimating Numbers of Terrestrial Birds :441--444 | ||
BibTeX:
@incollection{Raoetal81,
author = {Rao, P. V., Portier, K. M. and Ondrasik, J. A.},
title = {Density estimation using line transect sampling},
booktitle = {Estimating Numbers of Terrestrial Birds},
publisher = {Cooper Ornithological Society},
year = {1981},
number = {6},
pages = {441--444}
}
|
|||||
| Raphael, M., Baldwin, J., Falxa, G., Huff, M., Lance, M., Miller, S., Pearson, S.F., R., C.J., Strong, C. & Thompson, C. | 2007 | Regional population monitoring of the marbled murrelet: field and analytical methods [BibTeX] |
: | ||
BibTeX:
@techreport{Raphael2007,
author = {Raphael, M.G. and Baldwin, J. and Falxa, G.A. and Huff, M.H. and Lance, M. and Miller, S.L. and Pearson and S.F., Ralph and C.J., Strong, C. and Thompson, C.},
title = {Regional population monitoring of the marbled murrelet: field and analytical methods},
year = {2007},
number = {Gen. Tech. Rep. PNW-GTR- 716}
}
|
|||||
| Raphael, M., Evans Mack, D. & Wilk, R. | 1999 | Sampling marbled murrelets at sea: tests of survey methods and designs. [BibTeX] |
: | ||
BibTeX:
@techreport{Raphael1999,
author = {Raphael, M.G. and Evans Mack, D. and Wilk, R.J.},
title = {Sampling marbled murrelets at sea: tests of survey methods and designs.},
year = {1999}
}
|
|||||
| Raphael, M. G. | 1987 | Estimating relative abundance of forest birds: simple versus adjusted counts [BibTeX] |
Wilson Bulletin 99:125--131 | ||
BibTeX:
@article{Rap87,
author = {Raphael, M. G.},
title = {Estimating relative abundance of forest birds: simple versus adjusted counts},
journal = {Wilson Bulletin},
year = {1987},
volume = {99},
pages = {125--131}
}
|
|||||
| Raphael, M. G., Rosenberg, K. V. & Marcot, B. G. | 1988 | Large-scale changes in bird populations of Douglas-fir forests, Northwestern California [BibTeX] |
Bird Conservation :63--83 | ||
BibTeX:
@incollection{Rapetal88,
author = {Raphael, M. G. and Rosenberg, K. V. and Marcot, B. G.},
title = {Large-scale changes in bird populations of {D}ouglas-fir forests, {N}orthwestern {C}alifornia},
booktitle = {Bird Conservation},
publisher = {University of Wisconsin Press},
year = {1988},
pages = {63--83}
}
|
|||||
| Ratti, J. T., Smith, L. M., Hupp, J. W. & Laake, J. L. | 1983 | Line transect estimates of density and the winter mortality of Gray Partridge [BibTeX] |
Journal of Wildlife Management 47:1088--1096 | ||
BibTeX:
@article{Ratetal83,
author = {Ratti, J. T. and Smith, L. M. and Hupp, J. W. and Laake, J. L.},
title = {Line transect estimates of density and the winter mortality of {G}ray {P}artridge},
journal = {Journal of Wildlife Management},
year = {1983},
volume = {47},
pages = {1088--1096}
}
|
|||||
| Raum-Suryan, K. L. & Harvey, J. T. | 1998 | Distribution and abundance of and habitat use by harbor porpoise, Phocoena phocoena, off the northern San Juan Islands, Washington [BibTeX] |
Fishery Bulletin 96:808--822 | ||
BibTeX:
@article{RauHar98,
author = {Raum-Suryan, K. L. and Harvey, J. T.},
title = {Distribution and abundance of and habitat use by harbor porpoise, \emph{{P}hocoena phocoena}, off the northern {S}an {J}uan {I}slands, {W}ashington},
journal = {Fishery Bulletin},
year = {1998},
volume = {96},
pages = {808--822}
}
|
|||||
| Rayment, W., Dawson, S., Slooten, L. & Childerhouse, S. | 2006 | Offshore distribution of Hector's dolphin at Banks Peninsula [BibTeX] |
: | ||
BibTeX:
@techreport{Rayment2006,
author = {Rayment, W. and Dawson, S. and Slooten, L. and Childerhouse, S.},
title = {Offshore distribution of Hector's dolphin at Banks Peninsula},
year = {2006},
number = {232}
}
|
|||||
| Reading, R. P., Mix, H. M., Lhagvasuren, B., Feh, C., Kane, D. P., Dulamtseren, S. & Enkhbold, S. | 2001 | Status and distribution of khulan (Equus hemionus) in Mongolia [BibTeX] |
Journal of Zoology 254:381--89. | ||
BibTeX:
@article{Reading2001,
author = {Reading, R. P. and H. M. Mix and B. Lhagvasuren and C. Feh and D. P. Kane and S. Dulamtseren and S. Enkhbold},
title = {Status and distribution of khulan (\textit{Equus hemionus}) in Mongolia},
journal = {Journal of Zoology},
year = {2001},
volume = {254},
pages = {381--89.}
}
|
|||||
| Redmond, R. L., Bicak, T. K. & Jenni, D. A. | 1981 | An evaluation of breeding season census techniques for long-billed curlews (Numenius americanus) [BibTeX] |
Estimating Numbers of Terrestrial Birds :197--201 | ||
BibTeX:
@incollection{Redetal81,
author = {Redmond, R. L. and Bicak, T. K. and Jenni, D. A.},
title = {An evaluation of breeding season census techniques for long-billed curlews (\emph{{N}umenius americanus})},
booktitle = {Estimating Numbers of Terrestrial Birds},
publisher = {Cooper Ornithological Society},
year = {1981},
number = {6},
pages = {197--201}
}
|
|||||
| Rego, F. C. & Catry, F. X. | 2006 | Modelling the effects of distance on the probability of fire detection from lookouts [BibTeX] |
International Journal of Wildland Fire 15:197--202 | ||
BibTeX:
@article{Rego2006,
author = {Rego, F C and Catry, F X},
title = {Modelling the effects of distance on the probability of fire detection from lookouts},
journal = {International Journal of Wildland Fire},
year = {2006},
volume = {15},
pages = {197--202}
}
|
|||||
| Reid, D., Scalabrin, C., Petitgas, P., Masse, J., Aukland, R., Carrera, P. & Georgakarakos, S. | 2000 | Standard protocols for the analysis of school based data from echo sounder surveys | Fisheries Research 47:125--136 | ||
| Abstract: This paper presents a set of standard extraction parameters and protocols for the use of image analysis techniques in the processing of echo sounder data. The paper includes parameters at the school, elementary distance sampling unit (EDSU) and regional levels. The school level parameters, which are mainly derived from the image analysis, fall into four main categories: positional, morphometric, energetic and environmental. At the sampling unit level (i.e. standard integration units, commonly 1 or 2.5 nautical miles), parameters used include: school structures, protocols for including layers and general scatter plus ancillary (e.g. environmental) variables. These variables are derived mostly from visual examination of the echogram and from ancillary data collected underway. Regional level parameters include those mapped from point samples (e.g. trawls) or which are available as maps. Each school thus has its own unique parameters and is associated with an EDSU and through that to regional data. We discuss the application of such databases to the analysis of echo surveys at a school level in relation to aggregation patterns (school, school cluster and population) and to changes in those aggregation patterns with stock biomass and exploitation pattern. (C) 2000 Elsevier Science B.V. | |||||
BibTeX:
@article{Reid2000,
author = {Reid, D. and Scalabrin, C. and Petitgas, P. and Masse, J. and Aukland, R. and Carrera, P. and Georgakarakos, S.},
title = {Standard protocols for the analysis of school based data from echo sounder surveys},
journal = {Fisheries Research},
year = {2000},
volume = {47},
number = {2-3},
pages = {125--136}
}
|
|||||
| Reidy, J. L., Thompson, F. R. & Bailey, J. W. | 2011 | Comparison of methods for estimating density of forest songbirds from point counts [BibTeX] |
The Journal of Wildlife Management 75:558--568 | DOI | |
BibTeX:
@article{Reidy2011,
author = {Reidy, Jennifer L. and Thompson, Frank R. and Bailey, J. Wesley},
title = {Comparison of methods for estimating density of forest songbirds from point counts},
journal = {The Journal of Wildlife Management},
year = {2011},
volume = {75},
pages = {558--568},
doi = {10.1002/jwmg.93}
}
|
|||||
| Reilly, S. B., Rice, D. W. & Wolman, A. A. | 1983 | Population assessment of the gray whale, Eschrichtius robustus, from California shore censuses, 1967--80 [BibTeX] |
Fishery Bulletin 81:267--281 | ||
BibTeX:
@article{Reietal83,
author = {Reilly, S. B and Rice, D. W. and Wolman, A. A.},
title = {Population assessment of the gray whale, \emph{{E}schrichtius robustus}, from {C}alifornia shore censuses, 1967--80},
journal = {Fishery Bulletin},
year = {1983},
volume = {81},
pages = {267--281}
}
|
|||||
| Reilly, S. B., Rice, D. W. & Wolman, A. A. | 1980 | Preliminary population estimate for the California gray whale based upon Monterey shore censuses, 1967/68 to 1978/79. [BibTeX] |
Report of the International Whaling Commission 30:359--368 | ||
BibTeX:
@article{Reietal80,
author = {Reilly, S. B and Rice, D. W. and Wolman, A. A.},
title = {Preliminary population estimate for the {C}alifornia gray whale based upon {M}onterey shore censuses, 1967/68 to 1978/79.},
journal = {Report of the International Whaling Commission},
year = {1980},
volume = {30},
pages = {359--368}
}
|
|||||
| Reisinger, W. J., Stuart-Fox, D. M. & Erasmus, B. F. | 2006 | Habitat associations and conservation status of an endemic forest dwarf chameleon (Bradypodion sp.) from South Africa [BibTeX] |
Oryx 40:183-188 | DOI URL PDF | |
BibTeX:
@article{Reisinger2006,
author = {Reisinger,Walter J. and Stuart-Fox,Devi M. and Erasmus,Barend F.N.},
title = {Habitat associations and conservation status of an endemic forest dwarf chameleon (\textit{Bradypodion sp.}) from {South Africa}},
journal = {Oryx},
year = {2006},
volume = {40},
number = {02},
pages = {183-188},
url = {http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=440889&fulltextType=RA&fileId=S0030605306000408},
doi = {10.1017/S0030605306000408}
}
|
|||||
| Remis, M. J. | 2000 | Preliminary assessment of the impacts of human activities on gorillas Gorilla gorilla gorilla and other wildlife at Dzanga-Sangha Reserve, Central African Republic [BibTeX] |
Oryx 34:56--65 | ||
BibTeX:
@article{Rem00,
author = {Remis, M. J.},
title = {Preliminary assessment of the impacts of human activities on gorillas {\em {G}orilla gorilla gorilla} and other wildlife at {D}zanga-{S}angha {R}eserve, {C}entral {A}frican {R}epublic},
journal = {Oryx},
year = {2000},
volume = {34},
pages = {56--65}
}
|
|||||
| Rendas, L. | 2001 | Estimação da densidade populacional em amostragem por transectos lineares com recurso ao modelo logspline [BibTeX] |
: | ||
BibTeX:
@mastersthesis{Rendas2001,
author = {Luis Rendas},
title = {Estimação da densidade populacional em amostragem por transectos lineares com recurso ao modelo logspline},
school = {Universidade de Évora},
year = {2001}
}
|
|||||
| Rendas, L. & Alpizar-Jara, R. | 2005 | O modelo logspline aplicado aos transectos lineares [BibTeX] |
Estatística Jubilar :629-640 | ||
| Review: Continuo sem perceber porque é que: 1. Aparentemente se duplicam as amostras e não se diz nada sobre isso influenciar a variância (não percebo porque se duplicam as amostras se as observações são espacialemnte explicitas, e como tal tem sinal - se calhar esta so mal explicado). 2. o modelo exponencial negativo é melhor com spline q com o proprio modelo exp neg? |
|||||
BibTeX:
@incollection{Rendas2005,
author = {Rendas, L. and Alpizar-Jara, R.},
title = {O modelo logspline aplicado aos transectos lineares},
booktitle = {Estat{\'i}stica Jubilar},
publisher = {SPE},
year = {2005},
pages = {629-640}
}
|
|||||
| Rexstad, E. | 2007 | Point and interval estimates of abundance using multiple covariate distance sampling: An example using great bustards [BibTeX] |
: | ||
BibTeX:
@techreport{Rexstad2007,
author = {Eric Rexstad},
title = {Point and interval estimates of abundance using multiple covariate distance sampling: An example using great bustards},
year = {2007}
}
|
|||||
| Rexstad, E. | 2007 | Non-uniform coverage estimators for distance sampling [BibTeX] |
: | ||
BibTeX:
@techreport{Rexstad2007a,
author = {Rexstad, Eric},
title = {Non-uniform coverage estimators for distance sampling},
year = {2007}
}
|
|||||
| Reynolds, R. T., Scott, J. M. & Nussbaum, R. A. | 1980 | A variable circular-plot method for estimating bird numbers [BibTeX] |
Condor 82:309--313 | ||
BibTeX:
@article{Reyetal80,
author = {Reynolds, R. T and Scott, J. M. and Nussbaum, R. A.},
title = {A variable circular-plot method for estimating bird numbers},
journal = {Condor},
year = {1980},
volume = {82},
pages = {309--313}
}
|
|||||
| Richards, D. G. | 1981 | Environmental acoustics and censuses of singing birds [BibTeX] |
Estimating Numbers of Terrestrial Birds :297--300 | ||
BibTeX:
@incollection{Ric81,
author = {Richards, D. G.},
title = {Environmental acoustics and censuses of singing birds},
booktitle = {Estimating Numbers of Terrestrial Birds},
publisher = {Cooper Ornithological Society},
year = {1981},
number = {6},
pages = {297--300}
}
|
|||||
| Richardson, A. | 2007 | An Active Tutorial on Distance Sampling [BibTeX] |
Journal of Statistics Education 15: | ||
BibTeX:
@article{Richardson2007,
author = {Alice Richardson},
title = {An Active Tutorial on Distance Sampling},
journal = {Journal of Statistics Education},
year = {2007},
volume = {15}
}
|
|||||
| Ringvall, A., Patil, G. P. & Taillie, C. | 2000 | A field test of surveyors' influence on estimates in line transect sampling [BibTeX] |
Forest Ecology and Management 137:103--111 | ||
| Review: Trabalho simples que aborda a influência dos observadores e do modelo seleccionado nas estimativas. 11 observadores percorreram 16 transectos. Subestimação frequente (15% dos objectos a menos de 1 metro não foram detectados) O efeito dos observadores pode ser influente, especialmente em monitorizações ao longo do tempo. |
|||||
BibTeX:
@article{Rinetal00,
author = {Ringvall, A. and Patil, G. P. and Taillie, C.},
title = {A field test of surveyors' influence on estimates in line transect sampling},
journal = {Forest Ecology and Management},
year = {2000},
volume = {137},
pages = {103--111}
}
|
|||||
| Rinne, J. | 1985 | Density estimates and their errors in line transect counts of breeding birds [BibTeX] |
Ornis Fennica 62:1--8 | ||
BibTeX:
@article{Rin85,
author = {Rinne, J.},
title = {Density estimates and their errors in line transect counts of breeding birds},
journal = {Ornis Fennica},
year = {1985},
volume = {62},
pages = {1--8}
}
|
|||||
| Rivera-Milań, F., Collazo, J., Stahala, C., Moore, W., Davis, A., Herring, G., Steinkamp, M., Pagliaro, R., Thompson, J. & Bracey, W. | 2005 | Estimation of density and population size and recommendations for monitoring trends of Bahama parrots on Great Abaco and Great Inagua | Wildlife Society Bulletin 33:823--834 | ||
| Abstract: Once abundant and widely distributed, the Bahama parrot (Amazona leucocephala bahamensis) currently inhabits only the Great Abaco and Great lnagua Islands of the Bahamas. In January 2003 and May 2002-2004, we conducted point-transect surveys (a type of distance sampling) to estimate density and population size and make recommendations for monitoring trends. Density ranged from 0.061 (SE = 0.013) to 0.085 (SE = 0.018) parrots/ha and population size ranged from 1,600 (SE = 354) to 2,386 (SE = 508) parrots when extrapolated to the 26,154 ha and 28,162 ha covered by surveys on Abaco in May 2002 and 2003, respectively. Density was 0.183 (SE = 0.049) and 0.153 (SE = 0.042) parrots/ha and population size was 5,344 (SE = 1,431) and 4,450 (SE = 1,435) parrots when extrapolated to the 29,174 ha covered by surveys on Inagua in May 2003 and 2004, respectively. Because parrot distribution was clumped, we would need to survey 213-882 points on Abaco and 258-1,659 points on Inagua to obtain a CV of 10-20% for estimated density. Cluster size and its variability and clumping increased in wintertime, making surveys imprecise and cost-ineffective. Surveys were reasonably precise and cost-effective in springtime, and we recommend conducting them when parrots are pairing and selecting nesting sites. Survey data should be collected yearly as part of an integrated monitoring strategy to estimate density and other key demographic parameters and improve our understanding of the ecological dynamics of these geographically isolated parrot populations at risk of extinction. | |||||
BibTeX:
@article{Rivera-Milan2005,
author = {Rivera-Mila{\'n}, F.F. and Collazo, J.A. and Stahala, C. and Moore, W.J. and Davis, A. and Herring, G. and Steinkamp, M. and Pagliaro, R. and Thompson, J.L. and Bracey, W.},
title = {Estimation of density and population size and recommendations for monitoring trends of Bahama parrots on Great Abaco and Great Inagua},
journal = {Wildlife Society Bulletin},
year = {2005},
volume = {33},
number = {3},
pages = {823--834}
}
|
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| Rivera-Milań, F. F. | 1999 | Population dynamics of Zenaida doves in Cidra, Puerto Rico [BibTeX] |
Journal of Wildlife Management 63:232--244 | ||
BibTeX:
@article{Riv99,
author = {Rivera-Mila{\'n}, F. F.},
title = {Population dynamics of Zenaida doves in Cidra, Puerto Rico},
journal = {Journal of Wildlife Management},
year = {1999},
volume = {63},
pages = {232--244}
}
|
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| Rivera-Milán, F., Ruiz, C., Cruz, J., Vázquez, M. & Martínez, A. | 2003 | Population monitoring of plain pigeons in Puerto Rico [BibTeX] |
Wilson Bulletin 115:45--51 | ||
BibTeX:
@article{Rivera-Milan2003,
author = {Rivera-Mil{\'a}n, F.F. and Ruiz, C.R. and Cruz, J.A. and V{\'a}zquez, M. and Mart{\'i}nez, A.J.},
title = {Population monitoring of plain pigeons in Puerto Rico},
journal = {Wilson Bulletin},
year = {2003},
volume = {115},
number = {1},
pages = {45--51}
}
|
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| Rivera-Milán, F., Zaccagnini, M. & Canavelli, S. | 2004 | Field trials of line-transect surveys of bird carcasses in agro-ecosystems of Argentina's Pampas region | Wildlife Society Bulletin 32:1219--1228 | ||
| Abstract: Pesticides caused high mortality of birds in agro-ecosystems of Argentina's Pampas region during 1995-2003. As part of a program to monitor mortality events, we trained observers in distance sampling methods, conducted field trials under simulated conditions to assess the degree to which the critical assumptions of line-transect surveys were met, and estimated the density and number of chicken carcasses randomly placed along fixed transects in corn stubble, corn, alfalfa, wheat, pasture, and forest. The assumption of 100% detection probability of carcasses at 0 distance was met. We measured cluster size (1-5 carcasses) exactly and measured perpendicular distance from a cluster to transect centerline (0-40 m) with little error (absolute difference between actual and measured distances: x? = 0.14 m, SE = 0.01, n = 121). Cluster detection was not size-biased in corn stubble but was size-biased in corn, alfalfa, wheat, pasture, forest, and all strata combined. Thirteen 3-observer teams performed equally well in field trials regardless of having or not having observers with previous experience conducting transect surveys of bird carcasses in agro-ecosystems. Teams with experienced and inexperienced observers missed clusters near the centerline (defined here as 1.5-5 m for wheat and 5-15 m for other strata) but detected all clusters on the centerline (defined here as 0-1.5 m for wheat and 0-5 m for other strata). Percent relative bias was 0.36% for corn stubble (n = 39); 5.63% for the combined data of corn, alfalfa, wheat, pasture, and forest (n = 73); and 0.51% for all strata (n = 121). Bias estimates were small in relation to standard errors of density estimates, and the density estimator produced 95% confidence intervals that always included true densities. Predators and scavengers started removing carcasses during the first day of exposure (cumulative survival: x? = 0.69, SE = 0.04, n = 36) and stopped removing them after day 5 (cumulative survival: x? = 0.04, SE = 0.02, n = 5). Carcass removal rate averaged -0.38/day (SE = 0.03). Although line-transect sampling represents a viable method to estimate the density and number of dead birds in agro-ecosystems, scavenging data should be collected to adjust these estimates, even when surveys are conducted the day following pesticide application. An effective communication network between collaborators and the general public and observer readiness are needed as part of research and monitoring efforts to guide decision-making on agricultural practices, promote law enforcement, and manage wildlife in agro-ecosystems. | |||||
BibTeX:
@article{Rivera-Milan2004,
author = {Rivera-Mil{\'a}n, F.F. and Zaccagnini, M.E. and Canavelli, S.B.},
title = {Field trials of line-transect surveys of bird carcasses in agro-ecosystems of Argentina's Pampas region},
journal = {Wildlife Society Bulletin},
year = {2004},
volume = {32},
number = {4},
pages = {1219--1228}
}
|
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| Rivera-Milán, F. F. & Bonilla-Martínez, G. | 2007 | Estimation of Abundance and Recommendations for Monitoring White-Cheeked Pintails in Wetlands of Puerto Rico and Territorial Islands [BibTeX] |
Journal of Wildlife Management 71:861--867 | ||
BibTeX:
@article{Rivera-Milan2007,
author = {Rivera-Milán, F. F. and Bonilla-Martínez, G},
title = {Estimation of Abundance and Recommendations for Monitoring White-Cheeked Pintails in Wetlands of Puerto Rico and Territorial Islands},
journal = {Journal of Wildlife Management},
year = {2007},
volume = {71},
pages = {861--867}
}
|
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| Robbins, C. S. | 1981 | Effect of time of day on bird activity [BibTeX] |
Estimating Numbers of Terrestrial Birds :275--286 | ||
BibTeX:
@incollection{Rob81,
author = {Robbins, C. S.},
title = {Effect of time of day on bird activity},
booktitle = {Estimating Numbers of Terrestrial Birds},
publisher = {Cooper Ornithological Society},
year = {1981},
number = {6},
pages = {275--286}
}
|
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| Roberts, C. W. | 2005 | Estimating Density of Florida Key Deer [BibTeX] |
: | ||
BibTeX:
@mastersthesis{Roberts2005,
author = {Roberts, C. W.},
title = {Estimating Density of Florida Key Deer},
school = {Texas A\&M University},
year = {2005}
}
|
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| Roberts, J. & Schnell, G. | 2006 | Comparison of survey methods for wintering grassland birds | Journal of Field Ornithology 77:46--60 | ||
| Abstract: Although investigators have evaluated the efficacy of survey methods for assessing densities of breeding birds, few comparisons have been made of survey methods for wintering birds, especially in grasslands. In winter, social behavior and spatial distributions often differ from those in the breeding season. We evaluated the degree of correspondence between density estimates based on different survey methods. Surveys were conducted during two winters (2001-2002 and 2002-2003) on 16 grassland sites in southwestern Oklahoma. Line-transect (using a detection function to account for birds present but not detected) and area-search (where density was based on the total count within a given area) methods were employed. Observations on line transects were also analyzed as strip transects, where density was based on total count within a given strip width and no detection function was used. Savannah Sparrows (Passerculus sandwichensis), LeConte's Sparrows (Ammodramus leconteii), Song Sparrows (Melospiza melodia), Smith's Longspurs (Calcarius pictus), Chestnut-collared Longspurs (C. ornatus), and Eastern Meadowlarks (Sturnella magna) were sufficiently abundant to allow comparison. Area-search density estimates tended to be higher than line-transect estimates for Savannah Sparrows, Song Sparrows, and Eastern Meadowlarks, suggesting that some individuals initially located close to the transect line were not detected on line transects. The area-search and line-transect methods gave similar density estimates for Chestnut-collared and Smith's longspurs. Area-search estimates of Eastern Meadowlarks were significantly higher in the second year of the study only. For this species, area-search estimates did not differ from those of strip transects covering an equal area, so the reason for the differing meadowlark estimates is not clear. Higher density estimates using the area-search method likely resulted from: (1) birds that might escape detection by hiding were more likely detected (flushed) during area searches because of the repeated passes through the area, and (2) birds close to the line in line transects escape detection by hiding, biasing those estimates low. We also evaluated the correspondence of density rankings for the six species as determined by the different survey methods and for the same species across survey sites. Correlations among the six species of the area-search results with those of line transects and strip transects generally were high, increasing in 2002-2003 when densities of birds were greater. All three methods provided similar density rankings among species. Density rankings within species across sites for the four non-longspur species generally were concordant for the three methods, suggesting that any of them will adequately reflect among-site differences, especially when densities vary greatly across sites. Further research is needed to determine the extent to which grassland birds are missed on line transects. We suggest that workers using line transects to study these species give careful consideration and make additional efforts to satisfy the distance-sampling assumption that all birds on or near the line are detected. If density is measured as a total count in a fixed area, we recommend that observers pass within <10 m of all points in the area. ©2006 Association of Field Ornithologists. | |||||
| Review: Cita Chen | |||||
BibTeX:
@article{RobSch06,
author = {Roberts, J.P. and Schnell, G.D.},
title = {Comparison of survey methods for wintering grassland birds},
journal = {Journal of Field Ornithology},
year = {2006},
volume = {77},
number = {1},
pages = {46--60}
}
|
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| Robertson, G., Moreno, C., Lawton, K., Kirkwood, R. & Valencia, J. | 2008 | Comparison of census methods for black-browed albatrosses breeding at the Ildefonso Archipelago, Chile [BibTeX] |
Polar Biology 31:153-162 | URL | |
BibTeX:
@article{springerlink:10.1007/s00300-007-0342-7,
author = {Robertson, Graham and Moreno, Carlos and Lawton, Kieran and Kirkwood, Roger and Valencia, José},
title = {Comparison of census methods for black-browed albatrosses breeding at the Ildefonso Archipelago, Chile},
journal = {Polar Biology},
publisher = {Springer Berlin / Heidelberg},
year = {2008},
volume = {31},
pages = {153-162},
note = {10.1007/s00300-007-0342-7},
url = {http://dx.doi.org/10.1007/s00300-007-0342-7}
}
|
|||||
| Robinet, O., Barre, N. & Salas, M. | 1996 | Population estimate for the Ouvea Parakeet Eunymphicus cornutus uvaeensis: its present range and implications for conservation [BibTeX] |
Emu 96:151--157 | ||
BibTeX:
@article{Robetal96,
author = {Robinet, O. and Barre, N. and Salas, M.},
title = {Population estimate for the {O}uvea {P}arakeet \emph{{E}unymphicus cornutus uvaeensis}: its present range and implications for conservation},
journal = {Emu},
year = {1996},
volume = {96},
pages = {151--157}
}
|
|||||
| Robinette, W. L., Loveless, C. M. & Jones, D. A. | 1974 | Field tests of strip census methods [BibTeX] |
Journal of Wildlife Management 38:81--96 | ||
BibTeX:
@article{Robetal74,
author = {Robinette, W. L and Loveless, C. M. and Jones, D. A.},
title = {Field tests of strip census methods},
journal = {Journal of Wildlife Management},
year = {1974},
volume = {38},
pages = {81--96}
}
|
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| Rodda, G. & Campbell, E. | 2002 | Distance sampling of forest snakes and lizards [BibTeX] |
Herpetological Review 33:271--274 | ||
BibTeX:
@article{Rodda2002,
author = {Rodda, G.H. and Campbell, E.W.},
title = {Distance sampling of forest snakes and lizards},
journal = {Herpetological Review},
year = {2002},
volume = {33},
number = {4},
pages = {271--274}
}
|
|||||
| Roeder, K., D. B. & Garton, E. O. | 1987 | Estimating density from variable circular plot censuses [BibTeX] |
Journal of Wildlife Management 51:224--230 | ||
BibTeX:
@article{Roeetal87,
author = {Roeder, K., Dennis, B. and Garton, E. O.},
title = {Estimating density from variable circular plot censuses},
journal = {Journal of Wildlife Management},
year = {1987},
volume = {51},
pages = {224--230}
}
|
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| Ronconi, R. A. | 2008 | Patterns and processes of marine habitat selection: foraging ecology, competition and coexistence among coastal seabirds [BibTeX] |
: | ||
BibTeX:
@phdthesis{Ronconi2008,
author = {Ronconi, Robert Alfredo},
title = {Patterns and processes of marine habitat selection: foraging ecology, competition and coexistence among coastal seabirds},
school = {University of Victoria},
year = {2008}
}
|
|||||
| Ronconi, R. A. & Burger, A. E. | 2009 | Estimating seabird densities from vessel transects: distance sampling and implications for strip transects [BibTeX] |
Aquatic Biology 4:297--309 | ||
BibTeX:
@article{Ronconi2009,
author = {Robert A. Ronconi and Alan E. Burger},
title = {Estimating seabird densities from vessel transects: distance sampling and implications for strip transects},
journal = {Aquatic Biology},
year = {2009},
volume = {4},
pages = {297--309}
}
|
|||||
| Rorabaugh, J. C., Palermo, C. L. & Dunn, S. C. | 1987 | Distribution and relative abundance of the flat-tailed horned lizard (Phrynosoma mcallii) in Arizona [BibTeX] |
The Southwestern Naturalist 32:103--109 | ||
BibTeX:
@article{Roretal87,
author = {Rorabaugh, J. C and Palermo, C. L. and Dunn, S. C.},
title = {Distribution and relative abundance of the flat-tailed horned lizard (\emph{{P}hrynosoma mcallii}) in {A}rizona},
journal = {The Southwestern Naturalist},
year = {1987},
volume = {32},
pages = {103--109}
}
|
|||||
| Rosenstock, S. S. | 1998 | Influence of Gambel oak on breeding birds in ponderosa pine forests of northern Arizona [BibTeX] |
Condor 100:485--492 | ||
BibTeX:
@article{Ros98,
author = {Rosenstock, S. S.},
title = {Influence of {G}ambel oak on breeding birds in ponderosa pine forests of northern {A}rizona},
journal = {Condor},
year = {1998},
volume = {100},
pages = {485--492}
}
|
|||||
| Rosenstock, S. S., Anderson, D. R., Giesen, K. M., Leukering, T. & Carter, M. F. | 2002 | Landbird counting techniques: Current practices and an alternative | Auk 119:46--53 | ||
| Abstract: Counting techniques are widely used to study and monitor terrestrial birds. To assess current applications of counting techniques, we reviewed landbird studies published 1989-1998 in nine major journals and one symposium. Commonly used techniques fell into two groups: Procedures that used counts of bird detections as an index to abundance (index counts), and procedures that used empirical models of detectability to estimate density. Index counts rely upon assumptions concerning detectability that are difficult or impossible to meet in most field studies, but nonetheless remain the technique of choice among ornithologists; 95% of studies we reviewed relied upon point counts, strip transects, or other index procedures. Detectability-based density estimates were rarely used and deserve wider application in landbird studies. Distance sampling is a comprehensive extension of earlier detectability-based procedures (variable-width transects, variable circular plots) and a viable alternative to index counts. We provide a conceptual overview of distance sampling, specific recommendations for applying this technique to studies of landbirds, and an introduction to analysis of distance sampling data using the program DISTANCE. | |||||
BibTeX:
@article{Rosenstock2002,
author = {Rosenstock, S. S. and Anderson, D. R. and Giesen, K. M. and Leukering, T. and Carter, M. F.},
title = {Landbird counting techniques: Current practices and an alternative},
journal = {Auk},
year = {2002},
volume = {119},
number = {1},
pages = {46--53}
}
|
|||||
| Rotella, J. J. & Ratti, J. T. | 1986 | Test of a critical density index assumption: a case study with gray partridge [BibTeX] |
Journal of Wildlife Management 50:532--539 | ||
BibTeX:
@article{RotRat86,
author = {Rotella, J. J. and Ratti, J. T.},
title = {Test of a critical density index assumption: a case study with gray partridge},
journal = {Journal of Wildlife Management},
year = {1986},
volume = {50},
pages = {532--539}
}
|
|||||
| Routledge, R. D. & Fyfe, D. A. | 1992 | Confidence limits for line transect estimates based on shape restrictions [BibTeX] |
Journal of Wildlife Management 56:402--407 | ||
BibTeX:
@article{RouFyf92,
author = {Routledge, R. D. and Fyfe, D. A.},
title = {Confidence limits for line transect estimates based on shape restrictions},
journal = {Journal of Wildlife Management},
year = {1992},
volume = {56},
pages = {402--407}
}
|
|||||
| Routledge, R. D. & Fyfe, D. A. | 1992 | TRANSAN --- line transect estimates based on shape restrictions [BibTeX] |
Wildlife Society Bulletin 20:455--456 | ||
BibTeX:
@article{RouFyf92b,
author = {Routledge, R. D. and Fyfe, D. A.},
title = {{TRANSAN} --- line transect estimates based on shape restrictions},
journal = {Wildlife Society Bulletin},
year = {1992},
volume = {20},
pages = {455--456}
}
|
|||||
| Royama, T. | 1960 | The theory and practice of line transects in animal ecology by means of visual and auditory recognition [BibTeX] |
Yamashina Institute of Ornithology and Zoology 2:1--17 | ||
BibTeX:
@article{Roy60,
author = {Royama, T.},
title = {The theory and practice of line transects in animal ecology by means of visual and auditory recognition},
journal = {Yamashina Institute of Ornithology and Zoology},
year = {1960},
volume = {2},
pages = {1--17}
}
|
|||||
| Royle, J. | 2008 | Hierarchical modeling of cluster size in wildlife surveys [BibTeX] |
Journal of Agricultural, Biological, and Environmental Statistics 13:23-36 | URL | |
BibTeX:
@article{springerlink:10.1198/108571108X273188,
author = {Royle, J.},
title = {Hierarchical modeling of cluster size in wildlife surveys},
journal = {Journal of Agricultural, Biological, and Environmental Statistics},
publisher = {Springer New York},
year = {2008},
volume = {13},
pages = {23-36},
note = {10.1198/108571108X273188},
url = {http://dx.doi.org/10.1198/108571108X273188}
}
|
|||||
| Royle, J., Dawson, D. & Bates, S. | 2004 | Modeling abundance effects in distance sampling | Ecology 85:1591--1597 | ||
| Abstract: Distance-sampling methods are commonly used in studies of animal populations to estimate population density. A common objective of such studies is to evaluate the relationship between abundance or density and covariates that describe animal habitat or other environmental influences. However, little attention has been focused on methods of modeling abundance covariate effects in conventional distance-sampling models. In this paper we propose a distance-sampling model that accommodates covariate effects on abundance. The model is based on specification of the distance-sampling likelihood at the level of the sample unit in terms of local abundance (for each sampling unit). This model is augmented with a Poisson regression model for local abundance that is parameterized in terms of available covariates. Maximum-likelihood estimation of detection and density parameters is based on the integrated likelihood, wherein local abundance is removed from the likelihood by integration. We provide an example using avian point-transect data of Ovenbirds (Seiurus aurocapillus) collected using a distance-sampling protocol and two measures of habitat structure (understory cover and basal area of overstory trees). The model yields a sensible description (positive effect of understory cover, negative effect on basal area) of the relationship between habitat and Ovenbird density that can be used to evaluate the effects of habitat management on Ovenbird populations. | |||||
| Review: Trabalho muito interessante em que se faz uma maximização de uma verosimilhança que contem informação sobre a detecção e a abundância, mas eu não percebi bem se de facto se usa uma regressão (tipo GLM) ou uma maximização numérica da verosimilhança (fala-se nas duas coisas, fiquei perdido, e gostava de ver com o Steve). O modelo usado permite relacionar directamente a abundância com variaveis espacialmente explicitas. Nota que são usadas 2 variáveis e são considerados modelos Poisson e Binomial Negativo (4 modelos cada: um modelo sem covariaveis, um modelo com cada uma das duas e um modelo com as duas). O parametro k da binomial negativa é sempre proximo de 0, pelo que a Poisson é prefeirda. As variaveis estao bastante correlacionadas, oq ue explica que o modelo com as duas variáveis não é seleccionado, mas os modelos com as variaveis sozinhas são semelhantes em termos de qualidade. O AIC dos 4 modelos, para apoisson, varia entre 339.3 e 340.82, (1.52 de amplitude), e os dois melhores modelos estão separados por apenas 0.93 unidades o que é francamente pouco... É curioso que o valor do parâmetro da half-normal considerada é o mesmo, 14.23, para os 8 modelos considerados, e os autores notam que tal era esperado, pois de facto os N's podem ser removidos por condicionamento, como se faz na amostragem pod distancias tradicional. PERGUNTO-ME QUAL TERIA SIDO O VALOR DO PARÂMETRO SE SE TEM IGNORADO AS COVARIAVEIS... (seria igual?). Coisas a desenvolver ou criticar (STEVE): Não percebo como se pode obter os resultados da fig. 1 - ou melhor, pensei que sabia e não consigo.... (ver workspace no desktop) Fcio sem perceber como se consegue estimar a abundância usando este modelo, ou se só se obtem a relação entre abundância e covariàveis. Eles falam na pagina 1594 em usar BUP's para estimar os Ni's, mas não percebo bem como faze-lo, ou será que é simplesmente pelo preditor linear? Visto que se assume que a probabilidede de detecção é independente do valor das covariaveis, qual é a diferença entre fazer um glm entre os ni's e as covariaveis (especialmente porque apenas parecem interessados em estabelecer a relação entre covariaveis e abundância)????? Pois uma vez que se admite que a detectabilidade é constante (e como tal independente das covariaveis), não faz sentido inclui-la para modelar a relação entre covariáveis a abundância. Generalizar incluindo covariaveis e distancias exactas. |
|||||
BibTeX:
@article{Royle2004,
author = {Royle, J.A. and Dawson, D.K. and Bates, S.},
title = {Modeling abundance effects in distance sampling},
journal = {Ecology},
year = {2004},
volume = {85},
number = {6},
pages = {1591--1597}
}
|
|||||
| Royle, J. & Dorazio, R. | 2010 | Parameter-expanded data augmentation for Bayesian analysis of capture-recapture models [BibTeX] |
Journal of Ornithology :1-17 | URL | |
BibTeX:
@article{springerlink:10.1007/s10336-010-0619-4,
author = {Royle, J. and Dorazio, Robert},
title = {Parameter-expanded data augmentation for Bayesian analysis of capture-recapture models},
journal = {Journal of Ornithology},
publisher = {Springer Berlin / Heidelberg},
year = {2010},
pages = {1-17},
note = {10.1007/s10336-010-0619-4},
url = {http://dx.doi.org/10.1007/s10336-010-0619-4}
}
|
|||||
| Ruette, S., Stahl, P. & Albaret, M. | 2003 | Applying distance-sampling methods to spotlight counts of red foxes | Journal of Applied Ecology 40:32--43 | ||
| Abstract: 1. Monitoring red fox Vulpes vulpes abundance is necessary to assess the status and management of this species and to understand predator-prey relationships. Spotlight counts are most often used for this purpose. However, comparisons between regions or over years may be questionable when using encounter rates, i.e. the number of foxes seen per kilometre. We evaluated whether distance-sampling methods, which take account of variation in visibility, could be applied to spotlight counts of foxes along roads and trails. 2. Distance-sampling methods were used at 12 contrasting sites in France in a systematic design with equally spaced transects or points. Line and point transects were simultaneously applied at two sites to find the more precise and efficient method. 3. The number of foxes seen near the centreline was always low, although some foxes may have been missed. A peak of sightings at subsequent intervals from the centreline suggested evasive movements. 4. Despite the low sighting frequency near the centreline, which may reflect a violation of distance-sampling assumptions, a good model fit was obtained for eight out of 12 data sets using a regular 50-m grouping of the distance data. Increasing the first interval to account for evasive movement improved model fit in the four other data sets. Density estimates ranged from 0.39 to 3.54 foxes km-2 (range of coefficient of variation 4.5-24.6%). 5. Point and line transects resulted in similar density estimates, but point transects were more time consuming and resulted in larger coefficients of variation due to a smaller number of foxes seen by this method. Line transects may therefore produce better estimates of fox numbers. 6. There were few differences among the effective strip width estimates between the 12 sites (range 191-286 m), thus line transect estimates may have a limited advantage over encounter rates. 7. Synthesis and applications. The systematic scheme we applied in this study improved sampling design and variance estimations and should be useful for surveying terrestrial mammals with spotlight counts. However, the location of transects along roads and in open habitats probably induced biased results. Methodological improvements are necessary before spotlight distance sampling can become a routine monitoring tool for foxes. | |||||
BibTeX:
@article{Ruette2003,
author = {Ruette, S. and Stahl, P. and Albaret, M.},
title = {Applying distance-sampling methods to spotlight counts of red foxes},
journal = {Journal of Applied Ecology},
year = {2003},
volume = {40},
number = {1},
pages = {32--43}
}
|
|||||
| Rugh, D. J., Breiwick, J. M., Dahlheim, M. E. & Boucher, G. C. | 1993 | A comparison of independent, concurrent sighting records from a shore-based count of gray whales [BibTeX] |
Wildlife Society Bulletin 21:427--437 | ||
BibTeX:
@article{Rugetal93,
author = {Rugh, D. J and Breiwick, J. M and Dahlheim, M. E. and Boucher, G. C.},
title = {A comparison of independent, concurrent sighting records from a shore-based count of gray whales},
journal = {Wildlife Society Bulletin},
year = {1993},
volume = {21},
pages = {427--437}
}
|
|||||
| Rusk, J. P., Hernández, F., Arredondo, J. A., Hernádez, F., Bryant, F. C., Hewitt, D. G., Redeker, E. J., Brennan, L. A. & Bingham, R. L. | 2007 | An Evaluation of Survey Methods for Estimating Northern Bobwhite Abundance in Southern Texas | Journal of Wildlife Management 71:1336--1343 | URL | |
| Abstract: Distance sampling has been identified as a reliable and well-suited method for estimating northern bobwhite (Colinus virginianus) density. However, distance sampling using walked transects requires intense sampling to obtain precise estimates, thus making the technique impractical for large acreages. Researchers have addressed this limitation by either resorting to the use of indices (e.g., morning covey-call surveys) or incorporating the use of aerial surveys with distance sampling. Both approaches remain relatively untested. Our objectives were to 1) compare density estimates among morning covey-call surveys, helicopter transects, and walked transects; 2) test a critical assumption of distance sampling pertinent to helicopter surveys (i.e., all objects on line are detected); and 3) evaluate the underlying premise of morning covey-call surveys (i.e., that the no. of calling coveys correlates with bobwhite density). Our study was conducted on 3 study sites in Brooks County, Texas, USA, during October to December, 2001 to 2005. Comparisons between walked transects and morning covey-call surveys involved the entire 5-year data set, whereas helicopter transects involved only the latter 2 years. Density estimates obtained from helicopter transects were similar to walked transect estimates for both years. We documented a detection probability on the helicopter transect line of 70 ± 10.2% (% ± SE; n = 20 coveys). Morning covey-call surveys yielded similar density estimates to walked transect estimates during only 2 of 5 years, when walked transect estimates were the least accurate and precise. We detected a positive relationship (R2 = 0.51; 95% CI for slope: 29.5–53.1; n = 63 observations) between covey density and number of coveys heard calling. We conclude that helicopter transects appear to be a viable alternative to walked transects for estimating density of bobwhites. Morning covey-call surveys appear to be a poor method to estimate absolute abundance and to depict general population trajectories. | |||||
BibTeX:
@article{RUSK2007,
author = {Rusk, Joshua P. And Hernández, Fidel And Arredondo, Juan A. And Hernádez, Froylan And Bryant, Fred C. And Hewitt, David G. And Redeker, Eric J. And Brennan, Leonard A. And Bingham, Ralph L.},
title = {An Evaluation of Survey Methods for Estimating Northern Bobwhite Abundance in Southern Texas},
journal = {Journal of Wildlife Management},
year = {2007},
volume = {71},
number = {4},
pages = {1336--1343
},
url = {http://dx.doi.org/10.2193%2F2006-071}
}
|
|||||
| Safranyik, L. & Linton, D. | 2002 | Line transect sampling to estimate the density of lodgepole pine currently attacked by mountain pine beetle [BibTeX] |
: | ||
BibTeX:
@techreport{Safranyik2002,
author = {Safranyik, L. and D.A. Linton},
title = {Line transect sampling to estimate the density of lodgepole pine currently attacked by mountain pine beetle},
year = {2002},
number = {BC-X-392}
}
|
|||||
| Salafsky, S., Reynolds, R. & Noon, B. | 2005 | Patterns of temporal variation in Goshawk reproduction and prey resources | Journal of Raptor Research 39:237--246 | ||
| Abstract: To investigate whether Northern Goshawk (Accipiter gentilis) reproduction is food-limited, we evaluated the reproductive output from 401 goshawk breeding opportunities on the Kaibab Plateau, Arizona during 1999-2002. Concurrently, we estimated densities of 10 goshawk prey species (seven birds, three mammals) using distance sampling. We then assessed the relationship between goshawk productivity (number of fledglings produced) and prey density within and among years by relating the contribution of individual prey species and total prey density to goshawk productivity. We also estimated the proportion of total diet and biomass for each species that contributed ?3% of all prey items. Total prey density was highly correlated with variation in goshawk productivity (r2 = 0.98, P = 0.012). Red squirrel (Tamiasciurus hudsonicus) density explained more variation in goshawk productivity than any other species (r2 = 0.94, P = 0.031), but density could not be estimated for every predominant prey species in goshawk diets. However, only red squirrels had a positive and significant relationship to goshawk productivity in terms of frequency (r2 = 0.97, P = 0.014) and biomass (r2 = 0.95, P = 0.033). Northern Flickers (Colaptes auratus) and cottontail rabbits (Sylvilagus spp.), which contributed the greatest frequency and biomass, respectively, to goshawk diets, showed no relationship with goshawk productivity. Even though goshawks on the Kaibab Plateau have a diverse diet and will readily switch to alternate prey species, goshawk productivity showed significant interannual variation. Our results suggest that the magnitude of goshawk productivity was determined by total prey density and annual variation was driven by differences in the densities of critical prey species. © 2005 The Raptor Research Foundation, Inc. | |||||
BibTeX:
@article{Salafsky2005,
author = {Salafsky, S.R. and Reynolds, R.T. and Noon, B.R.},
title = {Patterns of temporal variation in Goshawk reproduction and prey resources},
journal = {Journal of Raptor Research},
year = {2005},
volume = {39},
number = {3},
pages = {237--246}
}
|
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| Saltz, D., Ward, D., Kapofi, I. & Karamata, J. | 2004 | Population estimation and harvesting potential for game in arid Namibia | South African Journal of Wildlife Research 34:153--161 | ||
| Abstract: We determined the densities of game on mixed game and livestock ranches in arid Namibia over three years using ground survey techniques and distance and point sampling. Annual game yield estimates varied considerably, depending on the sampling technique used. Estimates were further confounded by the fact that game can move freely between ranches. Our estimates suggest that the number of game that could be harvested per annum over time is relatively small. The spatial separation between cattle and game indicates that combining game and cattle ranching may be economical. Further studies on the space-use patterns for these species are necessary to determine how many ranches share the same animals. Rigorous population estimation techniques using aerial transects, combined with setting threshold values below which the populations will not be harvested, are necessary to reliably assess the density of the animals in this region and to prevent over harvesting. | |||||
BibTeX:
@article{Saltz2004,
author = {Saltz, D. and Ward, D. and Kapofi, I. and Karamata, J.},
title = {Population estimation and harvesting potential for game in arid Namibia},
journal = {South African Journal of Wildlife Research},
year = {2004},
volume = {34},
number = {2},
pages = {153--161}
}
|
|||||
| Sammler, J. E. | 2001 | Population trends of tundra-nesting birds in Churchill, Manitoba: potential effects of increasing lesser snow goose (Chen caerulescens caerulescens) populations [BibTeX] |
: | ||
BibTeX:
@mastersthesis{Sammler2001,
author = {John Edward Sammler},
title = {Population trends of tundra-nesting birds in Churchill, Manitoba: potential effects of increasing lesser snow goose (\textit{Chen caerulescens caerulescens}) populations},
school = {The University Of Minnesota},
year = {2001}
}
|
|||||
| Samuel, M. D., Garton, E. O., Schlegel, M. W. & Carson, R. G. | 1987 | Visibility bias during aerial surveys of elk in north central Idaho [BibTeX] |
Journal of Wildlife Management 51:622--630 | ||
BibTeX:
@article{Sametal87,
author = {Samuel, M. D and Garton, E. O and Schlegel, M. W. and Carson, R. G.},
title = {Visibility bias during aerial surveys of elk in north central {I}daho},
journal = {Journal of Wildlife Management},
year = {1987},
volume = {51},
pages = {622--630}
}
|
|||||
| Santangeli, A. & Dolman, P. | 2011 | Density and habitat preferences of male little bustard across contrasting agro-pastoral landscapes in Sardinia (Italy) [BibTeX] |
European Journal of Wildlife Research :1-11 | URL | |
BibTeX:
@article{springerlink:10.1007/s10344-011-0492-3,
author = {Santangeli, Andrea and Dolman, Paul},
title = {Density and habitat preferences of male little bustard across contrasting agro-pastoral landscapes in Sardinia (Italy)},
journal = {European Journal of Wildlife Research},
publisher = {Springer Berlin / Heidelberg},
year = {2011},
pages = {1-11},
note = {10.1007/s10344-011-0492-3},
url = {http://dx.doi.org/10.1007/s10344-011-0492-3}
}
|
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| van Schaik, C. P., Wich, S. A., Utami, S. S. & Odom, K. | 2005 | A simple alternative to line transects of nests for estimating orangutan densities [BibTeX] |
Primates 46:249--254 | ||
| Review: Really bad paper, generalizes specific conclusions to wider studies. thoughts exchanged with Eric below Hi Eric, Some comments... Why is their obscure way of calculating densities based on home ranges truth? Were did they get the different bits of data used in that procedure? But more relevant perhaps, the problems that they present for line transects (a separate section in the intro: "the line transect technique for orangutan nests and its problems) are exactly the same for plot sampling. In fact, under what scenario would you not be able to see all the nests on the line, but then would be able to see all the nests in entire plots? That's just nonsense, unless you want to make it so, but then it should take much more time to completely check the plots than do the line transect. I wonder if there might be an issue of avoidance of nest building near the transect, as this was along a "recently established... narrow boardwalk" - this alone would lead to underestimation I guess - though it would have to be a weird combination of things to make it so that the combined data set was better. The truth is that the key bit of information missing is the number of nests say in the first 3 meters that were missed, to see if this was a g(0) issue or not. If it was, then MRDS would be ideal for this, with the second pass providing the recaptures - and plot sampling should not really help... The key idea, of DS being biased if g(0)<1 is a fair point. The entire example just seems useless... |
|||||
BibTeX:
@article{Schaik2005,
author = {van Schaik, C. P. and Wich, S. A. and Utami, S. S. and Odom, K.},
title = {A simple alternative to line transects of nests for estimating orangutan densities},
journal = {Primates},
year = {2005},
volume = {46},
number = {4},
pages = {249--254}
}
|
|||||
| Scheidat, M., Gilles, A., Kock, K. H. & Siebert, U. | 2008 | Harbour porpoise Phocoena phocoena abundance in the southwestern Baltic Sea [BibTeX] |
Endangered Species Research 5:215--223 | URL PDF | |
BibTeX:
@article{M2008,
author = {M. Scheidat and A. Gilles and K. H. Kock and U. Siebert},
title = {Harbour porpoise Phocoena phocoena abundance in the southwestern Baltic Sea},
journal = {Endangered Species Research},
year = {2008},
volume = {5},
number = {2-3},
pages = {215--223},
url = {http://www.int-res.com/abstracts/esr/v5/n2-3/p215-223/}
}
|
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| Schmidt, B. | 2004 | Declining amphibian populations: The pitfalls of count data in the study of diversity, distributions, dynamics, and demography | Herpetological Journal 14:167--174 | ||
| Abstract: Most data used in the study of the demography, dynamics, distributions, diversity, and declines of amphibians are count data that are not adjusted for detection probabilities, which are generally variable and low. Such unadjusted count data are unreliable for understanding amphibian ecology, amphibian declines, or when developing conservation and management strategies. In the future, detection probabilities should be estimated and counts adjusted accordingly. This could be achieved by using capture-mark-recapture, distance sampling or novel Bayesian methods. | |||||
BibTeX:
@article{Schmidt2004,
author = {Schmidt, B.R.},
title = {Declining amphibian populations: The pitfalls of count data in the study of diversity, distributions, dynamics, and demography},
journal = {Herpetological Journal},
year = {2004},
volume = {14},
number = {4},
pages = {167--174}
}
|
|||||
| Schmidt, J. H., Rattenbury, K. L., Lawler, J. P. & Maccluskie, M. C. | 2011 | Using distance sampling and hierarchical models to improve estimates of Dall's sheep abundance [BibTeX] |
The Journal of Wildlife Management :n/a--n/a | DOI URL | |
BibTeX:
@article{JWMG:JWMG216,
author = {Schmidt, Joshua H. and Rattenbury, Kumi L. and Lawler, James P. and Maccluskie, Margaret C.},
title = {Using distance sampling and hierarchical models to improve estimates of Dall's sheep abundance},
journal = {The Journal of Wildlife Management},
publisher = {John Wiley \& Sons, Inc.},
year = {2011},
pages = {n/a--n/a},
url = {http://dx.doi.org/10.1002/jwmg.216},
doi = {10.1002/jwmg.216}
}
|
|||||
| Schmidt, P., Pierce, B. & Lopez, R. | 2007 | Estimating free-roaming cat densities in urban areas: comparison of mark-resight and distance sampling [BibTeX] |
Wildlife Biology in Practice 3:18--27 | ||
BibTeX:
@article{Schmidt2007,
author = {P.M. Schmidt and B.L. Pierce and R.R. Lopez},
title = {Estimating free-roaming cat densities in urban areas: comparison of mark-resight and distance sampling},
journal = {Wildlife Biology in Practice},
year = {2007},
volume = {3},
pages = {18--27}
}
|
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| Schwarz, C. J. & Seber, G. A. F. | 1999 | Estimating animal abundance: review III [BibTeX] |
Statistical Science 14:427--56 | ||
BibTeX:
@article{SchSeb99,
author = {Schwarz, C. J. and Seber, G. A. F.},
title = {Estimating animal abundance: review {III}},
journal = {Statistical Science},
year = {1999},
volume = {14},
pages = {427--56}
}
|
|||||
| Schweder, T. | 1999 | Line transecting with difficulties; lessons from surveying minke whales [BibTeX] |
Marine Mammal Survey and Assessment Methods :149--166 | ||
BibTeX:
@incollection{Sch99,
author = {Schweder, T.},
title = {Line transecting with difficulties; lessons from surveying minke whales},
booktitle = {Marine Mammal Survey and Assessment Methods},
publisher = {Balkema},
year = {1999},
pages = {149--166}
}
|
|||||
| Schweder, T. | 1977 | Point process models for line transect experiments [BibTeX] |
Recent Developments in Statistics :221--242 | ||
BibTeX:
@incollection{Sch77,
author = {Schweder, T.},
title = {Point process models for line transect experiments},
booktitle = {Recent Developments in Statistics},
publisher = {North-Holland Publishing Company},
year = {1977},
pages = {221--242}
}
|
|||||
| Schweder, T. | 2003 | Abundance Estimation from Multiple Photo Surveys: Confidence Distributions and Reduced Likelihoods for Bowhead Whales off Alaska | Biometrics 59:974-983 | DOI URL | |
| Abstract: Maximum likelihood estimates of abundance are obtained from repeated photographic surveys of a closed stratified population with naturally marked and unmarked individuals. Capture intensities are assumed log-linear in stratum, year, and season. In the chosen model, an approximate confidence distribution for total abundance of bowhead whales, with an accompanying likelihood reduced of nuisance parameters, is found from a parametric bootstrap experiment. The confidence distribution depends on the assumed study protocol. A confidence distribution that is exact (except for the effect of discreteness) is found by conditioning in the unstratified case without unmarked individuals. | |||||
BibTeX:
@article{Sch2003,
author = {Schweder, T.},
title = {Abundance Estimation from Multiple Photo Surveys: Confidence Distributions and Reduced Likelihoods for Bowhead Whales off Alaska},
journal = {Biometrics},
year = {2003},
volume = {59},
pages = {974-983},
url = {http://www.ingentaconnect.com/content/bpl/biom/2003/00000059/00000004/art00026},
doi = {doi:10.1111/j.0006-341X.2003.00112.x}
}
|
|||||
| Schweder, T. | 2003 | Point process models in line transect studies [BibTeX] |
: | ||
BibTeX:
@unpublished{Schweder2003,
author = {Tore Schweder},
title = {Point process models in line transect studies},
year = {2003}
}
|
|||||
| Schweder, T. | 1997 | Measurement error models for the Norwegian minke whale survey in 1995 [BibTeX] |
Report of the International Whaling Commission 47:485--488 | ||
BibTeX:
@article{SCH97,
author = {Schweder, T.},
title = {Measurement error models for the {N}orwegian minke whale survey in 1995},
journal = {Report of the International Whaling Commission},
year = {1997},
volume = {47},
pages = {485--488}
}
|
|||||
| Schweder, T. | 1996 | A note on a buoy-sighting experiment in the North Sea in 1990 [BibTeX] |
Report of the International Whaling Commission 46:383--385 | ||
BibTeX:
@article{SCH96,
author = {Schweder, T.},
title = {A note on a buoy-sighting experiment in the {N}orth {S}ea in 1990},
journal = {Report of the International Whaling Commission},
year = {1996},
volume = {46},
pages = {383--385}
}
|
|||||
| Schweder, T. | 1990 | Independent observer experiments to estimate the detection function in line transect surveys of whales [BibTeX] |
Report of the International Whaling Commission 40:349--355 | ||
BibTeX:
@article{Sch90,
author = {Schweder, T.},
title = {Independent observer experiments to estimate the detection function in line transect surveys of whales},
journal = {Report of the International Whaling Commission},
year = {1990},
volume = {40},
pages = {349--355}
}
|
|||||
| Schweder, T. | 1974 | Transformations of Point Processes: Applications to Animal Sighting and Catch Problems, with Special Emphasis on Whales [BibTeX] |
: | ||
BibTeX:
@phdthesis{Sch74,
author = {Schweder, T.},
title = {Transformations of Point Processes: Applications to Animal Sighting and Catch Problems, with Special Emphasis on Whales},
school = {University of California},
year = {1974}
}
|
|||||
| Schweder, T., Øien, N. & Høst, G. | 1993 | Estimates of abundance of northeastern Atlantic minke whales in 1989 [BibTeX] |
Report of the International Whaling Commission 43:323--331 | ||
BibTeX:
@article{Schetal93,
author = {Schweder, T. and {\O}ien, N. and H{\o}st, G.},
title = {Estimates of abundance of northeastern {A}tlantic minke whales in 1989},
journal = {Report of the International Whaling Commission},
year = {1993},
volume = {43},
pages = {323--331}
}
|
|||||
| Schweder, T., Øien, N. & Høst, G. | 1991 | Estimates of the detection probability for shipboard surveys of northeastern Atlantic minke whales, based on a parallel ship experiment [BibTeX] |
Report of the International Whaling Commission 41:417--432 | ||
BibTeX:
@article{Schetal91b,
author = {Schweder, T. and {\O}ien, N. and H{\o}st, G.},
title = {Estimates of the detection probability for shipboard surveys of northeastern {A}tlantic minke whales, based on a parallel ship experiment},
journal = {Report of the International Whaling Commission},
year = {1991},
volume = {41},
pages = {417--432}
}
|
|||||
| Schweder, T., Hagen, G., Helgeland, J. & Koppervik, I. | 1996 | Abundance estimation of northeastern Atlantic minke whales [BibTeX] |
Report of the International Whaling Commission 46:391--408 | ||
BibTeX:
@article{Schetal96,
author = {Schweder, T. and Hagen, G. and Helgeland, J. and Koppervik, I.},
title = {Abundance estimation of northeastern {A}tlantic minke whales},
journal = {Report of the International Whaling Commission},
year = {1996},
volume = {46},
pages = {391--408}
}
|
|||||
| Schweder, T. & Høst, G. | 1992 | Integrating experimental data and survey data to estimate $g(0)$: a first approach [BibTeX] |
Report of the International Whaling Commission 42:575--582 | ||
BibTeX:
@article{SchHos92,
author = {Schweder, T. and H{\o}st, G.},
title = {Integrating experimental data and survey data to estimate $g(0)$: a first approach},
journal = {Report of the International Whaling Commission},
year = {1992},
volume = {42},
pages = {575--582}
}
|
|||||
| Schweder, T., Høst, G. & Øien, N. | 1991 | A note on the bias in capture-recapture type estimates of g(0) due to the fact that whales are diving [BibTeX] |
Report of the International Whaling Commission 41:397--399 | ||
BibTeX:
@article{Schetal91,
author = {Schweder, T and H{\o}st, G. and {\O}ien, N.},
title = {A note on the bias in capture-recapture type estimates of \textit{g(0)} due to the fact that whales are diving},
journal = {Report of the International Whaling Commission},
year = {1991},
volume = {41},
pages = {397--399}
}
|
|||||
| Schweder, T., Skaug, H. J., Dimakos, X. K., Langaas, M. & Øien, N. | 1997 | Abundance of northeastern Atlantic minke whales, estimates for 1989 and 1995 [BibTeX] |
Report of the International Whaling Commission 47:453--483 | ||
BibTeX:
@article{Schetal97,
author = {Schweder, T and Skaug, H. J and Dimakos, X. K and Langaas, M. and {\O}ien, N.},
title = {Abundance of northeastern {A}tlantic minke whales, estimates for 1989 and 1995},
journal = {Report of the International Whaling Commission},
year = {1997},
volume = {47},
pages = {453--483}
}
|
|||||
| Schweder, T., Skaug, H. J., Langaas, M. & Dimakos, X. K. | 1999 | Simulated likelihood methods for complex double-platform line transect surveys [BibTeX] |
Biometrics 55:678--687 | ||
| Review: Tenho IMPRESSO | |||||
BibTeX:
@article{Schetal99,
author = {Schweder, T. and Skaug, H. J. and Langaas, M. and Dimakos, X. K.},
title = {Simulated likelihood methods for complex double-platform line transect surveys},
journal = {Biometrics},
year = {1999},
volume = {55},
pages = {678--687}
}
|
|||||
| Scott, J. M., Jacobi, J. D. & Ramsey, F. L. | 1981 | Avian surveys of large geographical areas: a systematic approach [BibTeX] |
Wildlife Society Bulletin 9:190--200 | ||
BibTeX:
@article{Scoetal81,
author = {Scott, J. M. and Jacobi, J. D. and Ramsey, F. L.},
title = {Avian surveys of large geographical areas: a systematic approach},
journal = {Wildlife Society Bulletin},
year = {1981},
volume = {9},
pages = {190--200}
}
|
|||||
| Scott, J. M. & Ramsey, F. L. | 1981 | Length of count period as a possible source of bias in estimating bird densities [BibTeX] |
Estimating Numbers of Terrestrial Birds :409--413 | ||
BibTeX:
@incollection{ScoRam81,
author = {Scott, J. M. and Ramsey, F. L.},
title = {Length of count period as a possible source of bias in estimating bird densities},
booktitle = {Estimating Numbers of Terrestrial Birds},
publisher = {Cooper Ornithological Society},
year = {1981},
number = {6},
pages = {409--413}
}
|
|||||
| Scott, J. M., Ramsey, F. L. & Kepler, C. B. | 1981 | Distance estimation as a variable in estimating bird numbers [BibTeX] |
Estimating Numbers of Terrestrial Birds :334--340 | ||
BibTeX:
@incollection{Scoetal81b,
author = {Scott, J. M. and Ramsey, F. L. and Kepler, C. B.},
title = {Distance estimation as a variable in estimating bird numbers},
booktitle = {Estimating Numbers of Terrestrial Birds},
publisher = {Cooper Ornithological Society},
year = {1981},
number = {6},
pages = {334--340}
}
|
|||||
| Seber, G. A. F. | 1979 | Transects of random length [BibTeX] |
Sampling Biological Populations :183--192 | ||
BibTeX:
@incollection{Seb79,
author = {Seber, G. A. F.},
title = {Transects of random length},
booktitle = {Sampling Biological Populations},
publisher = {International Co-operative Publishing House},
year = {1979},
pages = {183--192}
}
|
|||||
| Seber, G. A. F. | 2001 | Some New Directions in Estimating Animal Population Parameters [BibTeX] |
Journal of Agricultural, Biological, and Environmental Statistics 6:140--151 | ||
BibTeX:
@article{Seber2001,
author = {George A. F. Seber},
title = {Some New Directions in Estimating Animal Population Parameters},
journal = {Journal of Agricultural, Biological, and Environmental Statistics},
year = {2001},
volume = {6},
pages = {140--151}
}
|
|||||
| Seber, G. A. F. | 1992 | A review of estimating animal abundance II [BibTeX] |
International Statistical Review 60:129--166 | ||
BibTeX:
@article{Seb92,
author = {Seber, G. A. F.},
title = {A review of estimating animal abundance {II}},
journal = {International Statistical Review},
year = {1992},
volume = {60},
pages = {129--166}
}
|
|||||
| Seber, G. A. F. | 1986 | A review of estimating animal abundance [BibTeX] |
Biometrics 42:267--292 | ||
BibTeX:
@article{Seb86,
author = {Seber, G. A. F.},
title = {A review of estimating animal abundance},
journal = {Biometrics},
year = {1986},
volume = {42},
pages = {267--292}
}
|
|||||
| Seber, G. A. F. | 1982 | The Estimation of Animal Abundance, 2nd Ed [BibTeX] |
: | ||
BibTeX:
@book{SEB82,
author = {Seber,G. A. F.},
title = {The Estimation of Animal Abundance, 2nd Ed},
publisher = {Griffin},
year = {1982}
}
|
|||||
| Secchi, E. R., Ott, P. H., Crespo, E. A., Kinas, P. G., Pedraza, S. N. & Bordino, P. | 2001 | A first estimate of franciscana (Pontoporia blainvillei) abundance off southern Brazil. [BibTeX] |
Journal of Cetacean Research and Management 3:95--100 | ||
BibTeX:
@article{Secchi2001,
author = {Secchi, E R and Ott, P H and Crespo, E A and Kinas, P G and Pedraza, S N and Bordino, P},
title = {A first estimate of franciscana (\textit{Pontoporia blainvillei}) abundance off southern Brazil.},
journal = {Journal of Cetacean Research and Management},
year = {2001},
volume = {3},
number = {1},
pages = {95--100}
}
|
|||||
| Secchi, E. R., Rosa, L. D., Kinas, P. G., Nicolette, R. F., Azevedo, A. & Maia, Y. G. | 2006 | Abundance of humpback whale, Megaptera novaeangliae,in the gerlache and Bransfield Straits, Antarctic Peninsula Region [BibTeX] |
: | ||
BibTeX:
@techreport{Secci2006,
author = {Secchi, E. R. and Rosa, L. D. and Kinas, P. G. and Nicolette, R. F. and Azevedo, A. and Maia, Y. G.},
title = {Abundance of humpback whale, \textit{Megaptera novaeangliae},in the gerlache and Bransfield Straits, Antarctic Peninsula Region},
year = {2006},
number = {SC/A06/HW43},
note = {DRAFT: please do not quote without authors’ permission}
}
|
|||||
| Seddon, P., Ismail, K., Shobrak, M., Ostrowski, S. & Magin, C. | 2003 | A comparison of derived population estimate, mark-resighting and distance sampling methods to determine the population size of a desert ungulate, the Arabian oryx | ORYX 37:286--294 | ||
| Abstract: Post-release monitoring, including abundance estimation, is an important part of reintroductions, providing a basis for management intervention designed to achieve long-term persistence. The Arabian oryx Oryx leucoryx became extinct in the wild in 1972, surviving as captive populations. Since 1982 reintroductions of Arabian oryx have taken place in Oman and Saudi Arabia. Modelling of oryx population dynamics has highlighted the importance of precise estimation of population size (N). Between 1990 and 2000 three methods of estimating N have been applied in Mahazat as-Sayd protected area in Saudi Arabia: derived population estimates (DPE) based on known births and deaths, distance sampling, and mark-resighting (MR). This study assesses the feasibility and precision of these methods. Inability to assess precision, interdependence of consecutive estimates, and the assumption that all gains and losses are recorded, make DPE of limited value. At current densities, distance sampling along 455 km of driven transects yields too few detections to derive precise estimates of N. To achieve a coefficient of variation of 20% it would be necessary to drive up to c. 2,900 km of transect; this amount of survey effort could be achieved through pooling of data across repeat surveys of established transects. MR estimates, based on re-sighting of collared oryx, have the potential to yield the most precise estimates of N when the proportion of marked animals reaches 30% of the total population. The most reliable MR estimates available indicate the Mahazat as-Sayd Arabian oryx population had grown to >400 animals by 2000. © 2003 FFI. | |||||
BibTeX:
@article{Seddon2003,
author = {Seddon, P.J. and Ismail, K. and Shobrak, M. and Ostrowski, S. and Magin, C.},
title = {A comparison of derived population estimate, mark-resighting and distance sampling methods to determine the population size of a desert ungulate, the Arabian oryx},
journal = {ORYX},
year = {2003},
volume = {37},
number = {3},
pages = {286--294}
}
|
|||||
| Sedgwick, J. A. & Knopf, F. L. | 1987 | Breeding bird response to cattle grazing of a cottonwood bottomland [BibTeX] |
Journal of Wildlife Management 51:230--237 | ||
BibTeX:
@article{SedKno87,
author = {Sedgwick, J. A. and Knopf, F. L.},
title = {Breeding bird response to cattle grazing of a cottonwood bottomland},
journal = {Journal of Wildlife Management},
year = {1987},
volume = {51},
pages = {230--237}
}
|
|||||
| de Segura, A. G., Crespo, E. A., Pedraza, S. N., Hammond, P. S. & Raga, J. A. | 2006 | Abundance of small cetaceans in waters of the central Spanish Mediterranean [BibTeX] |
Marine Biology 150:149--160 | ||
BibTeX:
@article{Segura2006,
author = {Amaia Gomez de Segura and E. A. Crespo and S. N. Pedraza and P. S. Hammond and J. A. Raga},
title = {Abundance of small cetaceans in waters of the central Spanish Mediterranean},
journal = {Marine Biology},
year = {2006},
volume = {150},
pages = {149--160}
}
|
|||||
| Sen, A. R., Smith, G. E. J. & Butler, G. | 1978 | On a basic assumption in the line transect method [BibTeX] |
Biometrical Journal 20:363--369 | ||
BibTeX:
@article{Sen78,
author = {Sen, A. R. and Smith, G. E. J. and Butler, G.},
title = {On a basic assumption in the line transect method},
journal = {Biometrical Journal},
year = {1978},
volume = {20},
pages = {363--369}
}
|
|||||
| Sen, A. R., Tourigny, J. & Smith, G. E. J. | 1974 | On the line transect sampling method [BibTeX] |
Biometrics 30:329--341 | ||
BibTeX:
@article{Senetal74,
author = {Sen, A. R and Tourigny, J. and Smith, G. E. J.},
title = {On the line transect sampling method},
journal = {Biometrics},
year = {1974},
volume = {30},
pages = {329--341}
}
|
|||||
| Shaw, P. & Mungaya, E. | 2006 | The status and habitat of Karamoja Apalis Apalis karamojae in the Wembere Steppe, Sukumaland, Tanzania | Bird Conservation International 16:97--111 | ||
| Abstract: Karamoja Apalis Apalis karamojae is a globally Vulnerable warbler, restricted to north-east Uganda, north-central Tanzania and southern Kenya. Here, we describe its status and habitat in the Wembere Steppe, Sukumaland, Tanzania, an unprotected area of seasonally inundated grassland bordered partly by Acacia scrub. Although its habitat in the steppe was thought likely to span c. 175 km north-south during the 1960s to 1970s, we found the apalis to be patchily distributed over a distance of only 102 km north-south. Distance sampling yielded a density estimate of c. 7-16 birds km-2; equivalent to c. 3-7 pairs km-2, after juveniles (18% of the population) were excluded, and assuming that all adults were paired. The species occupied a very narrow foraging niche, feeding almost exclusively in Whistling Thorn Acacia drepanolobium, which accounted for 66% of woody stems in the study area, but for 95% of stems in the immediate vicinity of apalis sightings. Half of all individuals were encountered in the tallest, densest stands of A. drepanolobium, which covered less than 6% of the study area. Signs of scrub clearance, pruning and browsing were widespread in the steppe, and may have intensified during 1967-2002, when the human population in surrounding districts increased at a mean rate of c. 2-4% per year. Further research is required to determine whether our findings are representative of the species in other seasons and at other sites. © 2006 BirdLife International. | |||||
BibTeX:
@article{Shaw2006,
author = {Shaw, P. and Mungaya, E.},
title = {The status and habitat of Karamoja Apalis \textit{Apalis karamojae} in the Wembere Steppe, Sukumaland, Tanzania},
journal = {Bird Conservation International},
year = {2006},
volume = {16},
number = {2},
pages = {97--111}
}
|
|||||
| Shaw, P. & Shewry, M. | 2001 | Population density and habitat associations of restricted-range bird species at Ruhija, Bwindi Impenetrable Forest, Uganda | Bird Conservation International 11:161--174 | ||
| Abstract: Bwindi Impenetrable Forest, south-west Uganda, supports 24 of 37 restricted-range bird species of the Albertine Rift Mountains Endemic Bird Area (EBA). In common with other montane forest fragments in the EBA, Bwindi's structure and ecology have been substantially modified by human activities, the impact of which on its birds is difficult to gauge in the absence of quantitative information on their habitat use and abundance. During October 1999, habitat associations of nine restricted-range species and of 12 species with which they were commonly associated, were measured at Ruhija, Bwindi Impenetrable Forest. Logistic regression analysis was used to determine the relationship between habitat, topography, altitude and species occurrence. Population densities of 19 species were estimated using distance sampling, at survey points visited between dawn and midday. Although the detection rate declined during the morning, observations made towards midday helped to improve precision, without lowering density estimates. Eight habitat and topographical features significantly associated with restricted-range species are described. Few of the features measured were significantly associated with more than one species, underlining the importance of maintaining a diverse forest structure. Two restricted-range species were among the commonest birds in the study area, while a further four species were at least as abundant as their more widespread congeners. | |||||
BibTeX:
@article{Shaw2001,
author = {Shaw, P. and Shewry, M.},
title = {Population density and habitat associations of restricted-range bird species at Ruhija, Bwindi Impenetrable Forest, Uganda},
journal = {Bird Conservation International},
year = {2001},
volume = {11},
number = {3},
pages = {161--174}
}
|
|||||
| Sherman, D. E., Kaminski, R. M. & Leopold, B. D. | 1995 | Winter line-transect surveys of wood ducks and mallards in Mississippi Greentree Reservoirs [BibTeX] |
Wildlife Society Bulletin 23:155--163 | ||
BibTeX:
@article{Sheetal95,
author = {Sherman, D. E. and Kaminski, R. M. and Leopold, B. D},
title = {Winter line-transect surveys of wood ducks and mallards in {M}ississippi {G}reentree {R}eservoirs},
journal = {Wildlife Society Bulletin},
year = {1995},
volume = {23},
pages = {155--163}
}
|
|||||
| Shirakihara, M., Shirakihara, K. & Takemura, A. | 1994 | Distribution and seasonal density of the finless porpoise Neophocaena phocaenoides in the coastal waters of western Kyushu, Japan [BibTeX] |
Fisheries Science 60:41--46 | ||
BibTeX:
@article{Shietal94,
author = {Shirakihara, M. and Shirakihara, K. and Takemura, A.},
title = {Distribution and seasonal density of the finless porpoise \textit{{N}eophocaena phocaenoides} in the coastal waters of western {K}yushu, {J}apan},
journal = {Fisheries Science},
year = {1994},
volume = {60},
pages = {41--46}
}
|
|||||
| Shorrocks, B., Cristescu, B. & Magane, S. | 2008 | Estimating density of Kirk's dik-dik (Madoqua kirkii Günther), impala (Aepyceros melampus Lichtenstein) and common zebra (Equus burchelli Gray) at Mpala, Laikipia District, Kenya [BibTeX] |
African Journal of Ecology 46:612--619 | DOI | |
BibTeX:
@article{Shorrocks2008,
author = {Bryan Shorrocks and Bogdan Cristescu and Samiro Magane},
title = {Estimating density of Kirk's dik-dik (Madoqua kirkii Günther), impala (Aepyceros melampus Lichtenstein) and common zebra (Equus burchelli Gray) at Mpala, Laikipia District, Kenya},
journal = {African Journal of Ecology},
year = {2008},
volume = {46},
pages = {612--619},
doi = {10.1111/j.1365-2028.2007.00915.x}
}
|
|||||
| Short, J. & Turner, B. | 1992 | The distribution and abundance of the banded and rufous hare-wallabies, Lagostrophus fasciatus and Lagorchestes hirsutus [BibTeX] |
Biological Conservation 60:157--166 | ||
BibTeX:
@article{ShoTur92,
author = {Short, J. and Turner, B.},
title = {The distribution and abundance of the banded and rufous hare-wallabies, \emph{{L}agostrophus fasciatus} and \emph{{L}agorchestes hirsutus}},
journal = {Biological Conservation},
year = {1992},
volume = {60},
pages = {157--166}
}
|
|||||
| Shupe, T. E., Guthery, F. S. & Beasom, S. L. | 1987 | Use of helicopters to survey northern bobwhite populations on rangeland [BibTeX] |
Wildlife Society Bulletin 15:458--462 | ||
BibTeX:
@article{Shuetal87,
author = {Shupe, T. E. and Guthery, F. S. and Beasom, S. L.},
title = {Use of helicopters to survey northern bobwhite populations on rangeland},
journal = {Wildlife Society Bulletin},
year = {1987},
volume = {15},
pages = {458--462}
}
|
|||||
| Simons, T., Alldredge, M., Pollock, K. & Wettroth, J. M. | 2007 | Experimental analysis of the auditory detection process on avian point counts [BibTeX] |
The Auk 124:986--999 | ||
BibTeX:
@article{Simetal0000,
author = {Simons, T.R. and M.W. Alldredge, and K.H. Pollock and John M. Wettroth},
title = {Experimental analysis of the auditory detection process on avian point counts},
journal = {The Auk},
year = {2007},
volume = {124},
pages = {986--999}
}
|
|||||
| Simons, T. R., Pollock, K. H., Wettroth, J. M., Alldredge, M. W., Pacifici, K. & Brewster, J. | 2009 | Modeling Demographic Processes in Marked Populations [BibTeX] |
:237-254 | ||
BibTeX:
@inbook{Simons2009,
author = {Theodore R. Simons and Kenneth H. Pollock and John M. Wettroth and Mathew W. Alldredge and Krishna Pacifici and Jerome Brewster},
title = {Modeling Demographic Processes in Marked Populations},
publisher = {Springer, New York},
year = {2009},
pages = {237-254}
}
|
|||||
| Simons, T. R., Shriner, S. A. & Farnsworth, G. L. | 2006 | Comparison of breeding bird and vegetation communities in primary and secondary forests of Great Smoky Mountains National Park | Biological Conservation 129:302--311 | ||
| Abstract: We compared breeding bird communities and vegetation characteristics at paired point locations in primary (undisturbed) and mature secondary forest (70-100 years old) sites in Great Smoky Mountains National Park, USA to understand how sites logged prior to creation of the park compare to undisturbed sites following 70 years of protection from human disturbance. We found that bird and vegetation communities are currently similar, but retain some differences in species composition. Rank abundance curves for primary and secondary forest bird communities showed very similar patterns of species dominance. Species composition was also similar on the two sites which shared 24 of the 25 most frequently recorded species. Nonetheless, comparisons of density estimates derived from distance sampling showed three bird species were more abundant on primary forest sites and that one bird species was significantly more abundant on secondary forest sites. Notably, comparisons based on raw counts (unadjusted for potential differences in detectability) produced somewhat different results. Analyses of vegetation samples for the paired sites also showed relative similarity, but with some differences between primary and secondary forests. Primary forest sites had more large trees (trees greater than 50 cm diameter at breast height) and late successional species. Primary forest sites had a denser tall shrub layer while secondary forest sites had a denser canopy layer. Nonetheless, tree species richness, basal area of live trees and number of standing snags did not differ between primary and secondary forest sites. Results indicate that breeding bird communities on sites within the park that were logged commercially 70 years ago are currently quite similar to bird communities on sites with no history of human disturbance. Similarities between the bird communities on previously disturbed and undisturbed sites in Great Smoky Mountains National Park may exceed those on more fragmented landscapes because large patches of primary forest, adjacent to commercially logged sites, remained in the park when it was established in 1935. These patches of primary forest may have served as source areas for commercially logged sites. | |||||
BibTeX:
@article{Simons2006,
author = {Simons, T. R. and Shriner, S. A. and Farnsworth, G. L.},
title = {Comparison of breeding bird and vegetation communities in primary and secondary forests of {Great Smoky Mountains National Park}},
journal = {Biological Conservation},
year = {2006},
volume = {129},
pages = {302--311}
}
|
|||||
| Singleton, I. | 2000 | Ranging behaviour and seasonal movements of Sumatran orang-utans Pongo pygmaeus abelii in swamp forests [BibTeX] |
: | ||
BibTeX:
@phdthesis{Singleton2000,
author = {Singleton, I.},
title = {Ranging behaviour and seasonal movements of Sumatran orang-utans \textit{Pongo pygmaeus abelii} in swamp forests},
school = {The University Of Kent At Canterbury},
year = {2000}
}
|
|||||
| Singleton, I. | 2000 | Ranging behaviour and seasonal movements of Sumatran orang-utans Pongo pygmaeus abelii in swamp forests [BibTeX] |
Dodo 36:88-- | ||
BibTeX:
@article{Singleton2000b,
author = {Singleton, I.},
title = {Ranging behaviour and seasonal movements of Sumatran orang-utans \textit{Pongo pygmaeus abelii} in swamp forests},
journal = {Dodo},
year = {2000},
volume = {36},
pages = {88--}
}
|
|||||
| Skalski, J. R. | 1994 | Estimating wildlife populations based on incomplete area surveys [BibTeX] |
Wildlife Society Bulletin 22:192--203 | ||
BibTeX:
@article{Ska94,
author = {Skalski, J. R.},
title = {Estimating wildlife populations based on incomplete area surveys},
journal = {Wildlife Society Bulletin},
year = {1994},
volume = {22},
pages = {192--203}
}
|
|||||
| Skaug, H. J. | 2006 | Markov Modulated Poisson Processes for Clustered Line Transect Data [BibTeX] |
Environmental and Ecological Statistics 13:199-211 | ||
| Review: Tenho IMPRESSO | |||||
BibTeX:
@article{Skaug2006,
author = {Hans J. Skaug},
title = {Markov Modulated Poisson Processes for Clustered Line Transect Data},
journal = {Environmental and Ecological Statistics},
year = {2006},
volume = {13},
pages = {199-211}
}
|
|||||
| Skaug, H. J. | 1997 | Perpendicular distance line transect methods based on integrated spatial hazard probability models [BibTeX] |
Report of the International Whaling Commission 47:493--497 | ||
BibTeX:
@article{Ska97,
author = {Skaug, H. J.},
title = {Perpendicular distance line transect methods based on integrated spatial hazard probability models},
journal = {Report of the International Whaling Commission},
year = {1997},
volume = {47},
pages = {493--497}
}
|
|||||
| Skaug, H. J., Øien, N., Bøthun, G. & Schweder, T. | 2002 | Abundance of northeastern Atlantic minke whales for the survey period 1996-2001 [BibTeX] |
: | ||
BibTeX:
@techreport{Skaug2002,
author = {Hans J. Skaug and Nils {\O}ien and Gjermund B{\o}thun and Tore Schweder},
title = {Abundance of northeastern {A}tlantic minke whales for the survey period 1996-2001},
year = {2002},
number = {SC/54/RMP5}
}
|
|||||
| Skaug, H. J., Øien, N., Schweder, T. & Bøthun, G. | 2004 | Abundance of minke whales (Balaenoptera acutorostrata) in the Northeast Atlantic: variability in time and space [BibTeX] |
Canadian Journal of Fisheries and Aquatic Sciences 61:870--886 | ||
| Review: Tenho IMPRESSO | |||||
BibTeX:
@article{Skaetal04,
author = {Skaug, H. J. and {\O}ien, N. and Schweder, T. and B{\o}thun, G.},
title = {Abundance of minke whales (\emph{{B}alaenoptera acutorostrata}) in the {N}ortheast {A}tlantic: variability in time and space},
journal = {Canadian Journal of Fisheries and Aquatic Sciences},
year = {2004},
volume = {61},
pages = {870--886}
}
|
|||||
| Skaug, H. J. & Schweder, T. | 1999 | Hazard models for line transect surveys with independent observers [BibTeX] |
Biometrics 55:29--36 | ||
| Review: Tenho IMPRESSO | |||||
BibTeX:
@article{SkaSch99,
author = {Skaug, H. J. and Schweder, T.},
title = {Hazard models for line transect surveys with independent observers},
journal = {Biometrics},
year = {1999},
volume = {55},
pages = {29--36}
}
|
|||||
| Skellam, J. G. | 1958 | The mathematical foundations underlying the use of line transects in animal ecology [BibTeX] |
Biometrics 14:385--400 | ||
BibTeX:
@article{Ske58,
author = {Skellam, J. G.},
title = {The mathematical foundations underlying the use of line transects in animal ecology},
journal = {Biometrics},
year = {1958},
volume = {14},
pages = {385--400}
}
|
|||||
| Skirvin, A. A. | 1981 | Effect of time of day and time of season on the number of observations and density estimates of breeding birds [BibTeX] |
Estimating Numbers of Terrestrial Birds :271--274 | ||
BibTeX:
@incollection{Ski81,
author = {Skirvin, A. A.},
title = {Effect of time of day and time of season on the number of observations and density estimates of breeding birds},
booktitle = {Estimating Numbers of Terrestrial Birds},
publisher = {Cooper Ornithological Society},
year = {1981},
number = {6},
pages = {271--274}
}
|
|||||
| Slooten, E., D. S. & Rayment, W. | 2002 | Quantifying abundance of Hector's dolphins between Farewell Spit and Milford Sound [BibTeX] |
: | ||
BibTeX:
@techreport{Slooten2002,
author = {Slooten, E., Dawson, S. and W. Rayment},
title = {Quantifying abundance of Hector's dolphins between Farewell Spit and Milford Sound},
year = {2002},
number = {35}
}
|
|||||
| Smart, J., Ward, A. & White, P. | 2004 | Monitoring woodland deer populations in the UK: An imprecise science | Mammal Review 34:99--114 | ||
| Abstract: 1. The need to assess population size and change is central to any population monitoring programme. A range of monitoring techniques is available for deer, but few studies have addressed the performance of these techniques in terms of their accuracy and their power to detect population changes reliably. This study compares the performance of three commonly used techniques to monitor woodland deer populations in terms of their accuracy, precision and statistical power using field data and simulation modelling. 2. Faecal Standing Crop (FSC) was found to provide the most accurate estimates at all deer densities studied, but was outperformed by distance sampling using thermal imaging in terms of precision and statistical power. Faecal Accumulation Rate (FAR) performed worst in terms of precision and statistical power, and was inferior in terms of accuracy to FSC. The accuracy of FAR and distance sampling using thermal imaging was similar. 3. Annual surveying is not the best use of resources, since 10% per annum increases or decreases in a population could not be detected by any of the techniques within a 3-year time period. Even with the best technique under the most favourable conditions of deer density simulated in this study, a population change could only be detected reliably once the population had increased by 33% or decreased by 27%. In the least favourable conditions, the respective figures were a 380% increase or extinction. 4. All the techniques studied are relatively poor at detecting population change, so their use in practical deer management needs to be treated with caution. The consequences of relying on similar techniques to detect population change for rare species could be severe. © 2004 Mammal Society, Mammal Review. | |||||
BibTeX:
@article{Smart2004,
author = {Smart, J.C.R. and Ward, A.I. and White, P.C.L.},
title = {Monitoring woodland deer populations in the UK: An imprecise science},
journal = {Mammal Review},
year = {2004},
volume = {34},
number = {1-2},
pages = {99--114}
}
|
|||||
| Smith, C., Marrs, S., Atkinson, R., Papadopoulou, K. & Hills, J. | 2003 | Underwater television for fisheries-independent stock assessment of Nephrops norvegicus from the Aegean (eastern Mediterranean) Sea | Marine Ecology Progress Series 256:161--170 | ||
| Abstract: The underwater television (UWTV) technique for Nephrops stock assessment was evaluated from 7 grounds in the Aegean. Expert analysts made all burrow identification and burrow size measurements. Burrow density was given by (1) real-time in situ counts; (2) post-sampling laboratory replicate counts; and (3) multiple laboratory counts in strips analyzed by DISTANCE sampling in order to account for partial burrows and edge effects leading to over- or underestimation of densities. Trawls were used to estimate densities, mean carapace length and weight per ground. The laboratory method was the most efficient approach. In situ counts resulted in underestimation at high densities and overestimation at low densities. Further work with DISTANCE should include simulations with hypothetical data to optimise band widths related to the expected burrow size. All burrow density estimates produced similar significant negative relationships with burrow size and positive relationships with trawl density. Based on the tow length effects analysis, the use of tow lengths of 500 and 1000 m per station for high and mid-/low-density sites, respectively, is recommended. With expert analysts, laboratory counts, trawl support data, accurate delimitation of the grounds and adequate sampling spread to allow for local stock variability differences, the UWTV technique can be used for fishery-independent stock assessments, and its precision refined by taking into account edge effects. | |||||
BibTeX:
@article{Smith2003,
author = {Smith, C.J. and Marrs, S.J. and Atkinson, R.J.A. and Papadopoulou, K.N. and Hills, J.M.},
title = {Underwater television for fisheries-independent stock assessment of \textit{Nephrops norvegicus} from the Aegean (eastern Mediterranean) Sea},
journal = {Marine Ecology Progress Series},
year = {2003},
volume = {256},
pages = {161--170}
}
|
|||||
| Smith, G. E. J. | 1979 | Some aspects of line transect sampling when the target population moves [BibTeX] |
Biometrics 35:323--329 | ||
BibTeX:
@article{Smith79,
author = {Smith, G. E. J.},
title = {Some aspects of line transect sampling when the target population moves},
journal = {Biometrics},
year = {1979},
volume = {35},
pages = {323--329}
}
|
|||||
| Smith, G. W. & Nydegger, N. C. | 1985 | A spot-light, line transect method for surveying jack rabbits [BibTeX] |
Journal of Wildlife Management 49:699--702 | ||
BibTeX:
@article{SmiNyd85,
author = {Smith, G. W. and Nydegger, N. C.},
title = {A spot-light, line transect method for surveying jack rabbits},
journal = {Journal of Wildlife Management},
year = {1985},
volume = {49},
pages = {699--702}
}
|
|||||
| Smith, G. W., Nydegger, N. C. & Yensen, D. L. | 1984 | Passerine bird densities in shrubsteppe vegetation [BibTeX] |
Journal of Field Ornithology 55:261--264 | ||
BibTeX:
@article{Smietal84,
author = {Smith, G. W. and Nydegger, N. C. and Yensen, D. L.},
title = {Passerine bird densities in shrubsteppe vegetation},
journal = {Journal of Field Ornithology},
year = {1984},
volume = {55},
pages = {261--264}
}
|
|||||
| Smith, L. L., Linehan, J. M., Stober, J. M., J, E. M. & Jensen, J. B. | 2009 | An evaluation of distance sampling for large-scale gopher tortoise surveys in Georgia, USA [BibTeX] |
Applied Herpetology 6:355--368 | ||
BibTeX:
@article{Smith2009,
author = {Smith, L L and Linehan, J M and Stober, J M and Elliott M J and Jensen, J B},
title = {An evaluation of distance sampling for large-scale gopher tortoise surveys in Georgia, USA},
journal = {Applied Herpetology},
year = {2009},
volume = {6},
pages = {355--368}
}
|
|||||
| Smith, M., Barbour, P., Burger Jr., L. & Dinsmore, S. | 2005 | Density and diversity of overwintering birds in managed field borders in Mississippi | Wilson Bulletin 117:258--269 | ||
| Abstract: Grassland bird populations are sharply declining in North America. Changes in agricultural practices during the past 50 years have been suggested as one of the major causes of this decline. Field-border conservation practices encouraged by the U.S. Department of Agriculture's National Conservation Buffer Initiative meet many of the needs of sustainable agriculture and offer excellent opportunities to enhance local grassland bird populations within intensive agricultural production systems. Despite the abundant information on avian use of and reproductive success in, strip habitats during the breeding season, few studies have examined the potential value of field borders for wintering birds. We planted 89.0 km of field borders (6.1 m wide) along agricultural field edges on one-half of each of three row crop and forage production farms in northeastern Mississippi. We sampled bird communities along these field edges during February-March 2002 and 2003 using line-transect distance sampling and strip transects to estimate density and community structure, respectively. We used Program DISTANCE to estimate densities of Song (Melospiza melodia), Savannah (Passerculus sandwichensis), and other sparrows along bordered and non-bordered transects while controlling for adjacent plant community. Greater densities of several sparrow species were observed along most bordered transects. However, effects of field borders differed by species and adjacent plant community types. Diversity, species richness, and relative conservation value (a weighted index derived by multiplying species-specific abundances by their respective Partners in Flight conservation priority scores) were similar between bordered and non-bordered edges. Field borders are practical conservation tools that can be used to accrue multiple environmental benefits and enhance wintering farmland bird populations. Provision of wintering habitat at southern latitudes may influence population trajectories of short-distance migrants of regional conservation concern. | |||||
BibTeX:
@article{Smith2005,
author = {Smith, M.D. and Barbour, P.J. and Burger Jr., L.W. and Dinsmore, S.J.Smith},
title = {Density and diversity of overwintering birds in managed field borders in Mississippi},
journal = {Wilson Bulletin},
year = {2005},
volume = {117},
number = {3},
pages = {258--269}
}
|
|||||
| Smith, M. D., Hamrick, R. G., L. Wes Burger, J. & Carroll, J. P. | 2006 | Estimating sample sizes for distance sampling of autumn northern bobwhite calling coveys [BibTeX] |
GamebirdGamebird 2006 :46--53 | ||
BibTeX:
@inproceedings{Smith2006,
author = {Mark D. Smith and Richard G. Hamrick and L. Wes Burger, Jr. and John P. Carroll},
title = {Estimating sample sizes for distance sampling of autumn northern bobwhite calling coveys},
booktitle = {Gamebird 2006},
journal = {Gamebird},
year = {2006},
pages = {46--53}
}
|
|||||
| Smith, T. D. | 1981 | Line-transect techniques for estimating density of porpoise schools [BibTeX] |
Journal of Wildlife Management 45:650--657 | ||
BibTeX:
@article{Smi81,
author = {Smith, T. D.},
title = {Line-transect techniques for estimating density of porpoise schools},
journal = {Journal of Wildlife Management},
year = {1981},
volume = {45},
pages = {650--657}
}
|
|||||
| Smolensky, N. L. & Fitzgerald, L. A. | 2010 | Distance Sampling Underestimates Population Densities of Dune-Dwelling Lizards [BibTeX] |
Journal of Herpetology 44:372--381 | ||
BibTeX:
@article{Smolensky2010,
author = {Nicole L. Smolensky and Lee A. Fitzgerald},
title = {Distance Sampling Underestimates Population Densities of Dune-Dwelling Lizards},
journal = {Journal of Herpetology},
year = {2010},
volume = {44},
pages = {372--381}
}
|
|||||
| Somershoe, S. G., Twedt, D. J. & Reid, B. | 2006 | Combining breeding bird survey and distance sampling to estimate density of migrant and breeding birds | Condor 108:691--699 | ||
| Abstract: We combined Breeding Bird Survey point count protocol and distance sampling to survey spring migrant and breeding birds in Vicksburg National Military Park on 33 days between March and June of 2003 and 2004. For 26 of 106 detected species, we used program DISTANCE to estimate detection probabilities and densities from 660 3-min point counts in which detections were recorded within four distance annuli. For most species, estimates of detection probability, and thereby density estimates, were improved through incorporation of the proportion of forest cover at point count locations as a covariate. Our results suggest Breeding Bird Surveys would benefit from the use of distance sampling and a quantitative characterization of habitat at point count locations. During spring migration, we estimated that the most common migrant species accounted for a population of 5000-9000 birds in Vicksburg National Military Park (636 ha). Species with average populations of >300 individuals during migration were: Blue-gray Gnatcatcher (Polioptila caerulea), Cedar Waxwing (Bombycilla cedrorum), White-eyed Vireo (Vireo griseus), Indigo Bunting (Passerina cyanea), and Ruby-crowned Kinglet (Regulus calendula). Of 56 species that bred in Vicksburg National Military Park, we estimated that the most common 18 species accounted for >8150 individuals. The six most abundant breeding species, Blue-gray Gnatcatcher, White-eyed Vireo, Summer Tanager (Piranga rubra), Northern Cardinal (Cardinalis cardinalis), Carolina Wren (Thryothorus ludovicianus), and Brown-headed Cowbird (Molothrus ater), accounted for >5800 individuals. © The Cooper Ornithological Society 2006. | |||||
BibTeX:
@article{Somershoe2006,
author = {Somershoe, S. G. and Twedt, D. J. and Reid, B.},
title = {Combining breeding bird survey and distance sampling to estimate density of migrant and breeding birds},
journal = {Condor},
year = {2006},
volume = {108},
number = {3},
pages = {691--699}
}
|
|||||
| Sousa, F. M. | 2009 | Densidade de Pan troglodytes verus e uso de recursos naturais pela população local, (Gadamael, República da Guiné-Bissau) [BibTeX] |
: | ||
BibTeX:
@mastersthesis{Sousa2009,
author = {Fernando Miguel Sousa},
title = {Densidade de \textit{Pan troglodytes verus} e uso de recursos naturais pela população local, (Gadamael, República da Guiné-Bissau)},
school = {Universidade De Lisboa Faculdade De Ciências, Departamento De Biologia Animal},
year = {2009}
}
|
|||||
| de Sousa, J. V. | 2007 | Densidade de Pan troglodytes verus e veículos de sensibilização ambiental: quatro florestas de Cantanhez, República da Guiné-Bissau [BibTeX] |
: | ||
BibTeX:
@mastersthesis{Sousa2007,
author = {Joana Vaz de Sousa},
title = {{Densidade de \textit{Pan troglodytes verus} e veículos de sensibilização ambiental: quatro florestas de Cantanhez, República da Guiné-Bissau}},
year = {2007},
note = {Mestrado em Biologia da Conservação, Dissertação orientada pela Professora Doutora Cláudia Sousa e pelo Professor Doutor Luis Vicente}
}
|
|||||
| Southwell, C. | 2005 | Response behaviour of seals and penguins to helicopter surveys over the pack ice off East Antarctica [BibTeX] |
Antarctic Science 17:328--334 | ||
BibTeX:
@article{Southwell2005,
author = {Southwell, C.},
title = {Response behaviour of seals and penguins to helicopter surveys over the pack ice off East Antarctica},
journal = {Antarctic Science},
year = {2005},
volume = {17},
number = {3},
pages = {328--334}
}
|
|||||
| Southwell, C. | 1994 | Evaluation of walked line transect counts for estimating macropod density [BibTeX] |
Journal of Wildlife Management 58:348--356 | ||
BibTeX:
@article{SOU94,
author = {Southwell, C.},
title = {Evaluation of walked line transect counts for estimating macropod density},
journal = {Journal of Wildlife Management},
year = {1994},
volume = {58},
pages = {348--356}
}
|
|||||
| Southwell, C., Borchers, D., de la Mare, B., Paxton, C., Burt, L. & de la Mare, W. | 2007 | Estimation of detection probability on aerial surveys of Antarctic pack-ice seals [BibTeX] |
Journal of Agricultural, Biological, and Environmental Statistics 12:1--14 | ||
BibTeX:
@article{Southwell2007,
author = {Southwell, C. and Borchers, D. and de la Mare, B. and Paxton, C.G.M. and Burt, L. and de la Mare, W.},
title = {Estimation of detection probability on aerial surveys of Antarctic pack-ice seals},
journal = {Journal of Agricultural, Biological, and Environmental Statistics},
year = {2007},
volume = {12},
pages = {1--14}
}
|
|||||
| Southwell, C., De la Mare, B., Underwood, M., Quartararo, F. & Cope, K. | 2002 | An automated system to log and process distance sight-resight aerial survey data | Wildlife Society Bulletin 30:394--404 | ||
| Abstract: Distance sight-resight sampling has particular relevance to aerial surveys, in which height above ground and aircraft speed make the critical assumption of certain detection on the track-line unrealistic. Recent developments in distance sight-resight theory have left practical issues related to data collection as the major impediment to widespread use of distance sight-resight sampling in aerial surveys. We describe and evaluate a system to automatically log, store, and process data from distance sight-resight aerial surveys. The system has a primary digital system and a secondary audio system. The digital system comprises a sighting "gun" and small keypad for each observer, a global positioning system (GPS) receiver, and an altimeter interface, all linked to a central laptop computer. The gun is used to record time and angle of declination from the horizon of sighted groups of animals as they pass the aircraft. The keypad is used to record information on species and group size. The altimeter interface records altitude from the aircraft's radar altimeter, and the GPS receiver provides location data at user-definable intervals. We wrote software to import data into a database and convert it into a form appropriate for distance sight-resight analyses. Perpendicular distance of sighted groups of animals from the flight path is calculated from altitude and angle of declination. Time, angle of declination, species, and group size of sightings by independent observers on the same side of the aircraft are used as criteria to classify single and duplicate sightings, allowing testing of the critical distance sampling assumption [g(0)=1] and estimation of g(0) if that assumption fails. An audio system comprising headphones for each observer and a 4-track tape recorder allows recording of data that are difficult to accommodate in the digital system and provides a backup to the digital system. We evaluated the system by conducting experimental surveys and reviewing results from actual surveys. | |||||
BibTeX:
@article{Southwell2002,
author = {Southwell, C. and De la Mare, B. and Underwood, M. and Quartararo, F. and Cope, K.},
title = {An automated system to log and process distance sight-resight aerial survey data},
journal = {Wildlife Society Bulletin},
year = {2002},
volume = {30},
number = {2},
pages = {394--404}
}
|
|||||
| Southwell, C. & Low, M. | 2009 | Black and white or shades of grey? Detectability of Adélie penguins during shipboard surveys in the Antarctic pack-ice [BibTeX] |
Journal of Applied Ecology 46:136--143 | ||
BibTeX:
@article{Southwell2009,
author = {Colin Southwell and Matthew Low},
title = {Black and white or shades of grey? Detectability of Adélie penguins during shipboard surveys in the Antarctic pack-ice},
journal = {Journal of Applied Ecology},
year = {2009},
volume = {46},
pages = {136--143}
}
|
|||||
| Southwell, C., de la Mare, B., Borchers, D. L. & Burt, L. | 2004 | Shipboard line transect surveys of crabeater seal abundance in the pack-ice off east Antarctica: Evaluation of assumptions [BibTeX] |
Marine Mammal Science 20:602-620 | ||
BibTeX:
@article{Southwell2004,
author = {C. Southwell and B. de la Mare and D. L. Borchers and L. Burt},
title = {Shipboard line transect surveys of crabeater seal abundance in the pack-ice off east Antarctica: Evaluation of assumptions},
journal = {Marine Mammal Science},
year = {2004},
volume = {20},
pages = {602-620}
}
|
|||||
| Southwell, C., Paxton, C. & Borchers, D. | 2008 | Detectability of penguins in aerial surveys over the pack-ice off Antarctica [BibTeX] |
Wildlife Research 35:349-357 | ||
BibTeX:
@article{Southwell2008a,
author = {Southwell, C. and Paxton, C.G.M. and Borchers, D.L.},
title = {Detectability of penguins in aerial surveys over the pack-ice off Antarctica},
journal = {Wildlife Research},
year = {2008},
volume = {35},
pages = {349-357}
}
|
|||||
| Southwell, C., Paxton, C., Rogers, T., Borchers, D., Boveng, P. & de la Mare, W. | 2008 | Uncommon or cryptic? Challenges in estimating leopard seal abundance by conventional but state-of-the-art methods [BibTeX] |
Deep Sea Research Part I 55:519--531 | ||
BibTeX:
@article{Southwell2008,
author = {Southwell, C. and Paxton, C.G.M. and Rogers, T. and Borchers, D.L. and Boveng, P. and de la Mare, W.K.},
title = {Uncommon or cryptic? Challenges in estimating leopard seal abundance by conventional but state-of-the-art methods},
journal = {Deep Sea Research Part I},
year = {2008},
volume = {55},
pages = {519--531}
}
|
|||||
| Southwell, C. & Weaver, K. | 1993 | Evaluation of analytical procedures for density estimation from line transect data --- data grouping, data truncation and the unit of analysis | Wildlife Research 20:433--444 | ||
| Abstract: Examined three aspects of line-transect analytical procedures: data grouping, data truncation and the use of individuals or clusters as the analytical unit. Bias and precision of density estimation in relation to various levels of these factors were assessed for four types of line-transect estimator (simple parametric, generalised parametric, non-parametric and quasi-strip) using line-transect survey data from macropod populations of known density. Bias was stable across all grouping levels tested for the simple parametric estimator, and stable across all but the coarsest grouping level for the generalized parametric and non-parametric estimators, but varied substantially across the range of levels tested for the quasi-strip estimator. Precision improved as the number of grouping levels increased for all estimators tested, but the extent of improvement varied between estimators, and for the estimator most affected, improvement was marginal beyond intermediate grouping levels. Density estimates were generally more accurate and precise when analysed in ungrouped form than in grouped form. Varying the analytical unit did not affect bias, but precision was significantly lower for cluster analysis than individual analysis for all estimators. | |||||
BibTeX:
@article{SouWea93,
author = {Southwell, C. and Weaver, K.},
title = {Evaluation of analytical procedures for density estimation from line transect data --- data grouping, data truncation and the unit of analysis},
journal = {Wildlife Research},
year = {1993},
volume = {20},
pages = {433--444}
}
|
|||||
| Southwell, C. J., Cairns, S. C., Palmer, R., D. R. & Broers, R. | 1997 | Abundance of large macropods in the eastern highlands of Australia [BibTeX] |
Wildlife Society Bulletin 25:125--132 | ||
BibTeX:
@article{Souetal97,
author = {Southwell, C. J. and Cairns, S. C. and Palmer, R., Delaney, R. and Broers, R.},
title = {Abundance of large macropods in the eastern highlands of {A}ustralia},
journal = {Wildlife Society Bulletin},
year = {1997},
volume = {25},
pages = {125--132}
}
|
|||||
| Southwell, C. J., Weaver, K. E., Cairns, S. C., Pople, A. R., Gordon, A. N., Shepard, N. W. & Broers, R. | 1995 | Abundance of macropods in north-eastern New South Wales, and the logistics of broad-scale ground surveys [BibTeX] |
Wildlife Research 22:757--766 | ||
BibTeX:
@article{Souetal95b,
author = {Southwell, C. J. and Weaver, K. E. and Cairns, S. C. and Pople, A. R. and Gordon, A. N. and Shepard, N. W. and Broers, R.},
title = {Abundance of macropods in north-eastern {N}ew {S}outh {W}ales, and the logistics of broad-scale ground surveys},
journal = {Wildlife Research},
year = {1995},
volume = {22},
pages = {757--766}
}
|
|||||
| Spear, L., Nur, N. & Ainley, D. G. | 1992 | Estimating absolute densities of flying seabirds using analyses of relative movement [BibTeX] |
The Auk 109:385--389 | ||
BibTeX:
@article{Speetal92,
author = {Spear, L. and Nur, N. and Ainley, D. G.},
title = {Estimating absolute densities of flying seabirds using analyses of relative movement},
journal = {The Auk},
year = {1992},
volume = {109},
pages = {385--389}
}
|
|||||
| Stahl, G., Ringvall, A. & Lämas, T. | 2000 | Guided transect sampling for assessing sparse populations [BibTeX] |
Forest Science 46:108--115 | ||
BibTeX:
@article{Staetal00,
author = {St\.{a}hl, G. and Ringvall, A. and L{\"a}m{\.a}s, T.},
title = {Guided transect sampling for assessing sparse populations},
journal = {Forest Science},
year = {2000},
volume = {46},
pages = {108--115}
}
|
|||||
| Staicer, C. A. & McLennan, D. | 1997 | Using point-distance sampling of bird densities as an indicator of forest ecological integrity - a pilot study in Kejimkujik National Park [BibTeX] |
: | ||
BibTeX:
@unpublished{Staicer1997,
author = {Staicer, C. A. and McLennan, D.},
title = {Using point-distance sampling of bird densities as an indicator of forest ecological integrity - a pilot study in {Kejimkujik National Park}},
year = {1997}
}
|
|||||
| Stanbury, A. & Gregory, R. | 2009 | Exploring the effects of truncated, pooled and sexed data in distance sampling estimation of breeding bird abundance [BibTeX] |
Bird Study 56:298--309 | ||
BibTeX:
@article{Stanbury2009,
author = {Andrew Stanbury and Richard Gregory},
title = {Exploring the effects of truncated, pooled and sexed data in distance sampling estimation of breeding bird abundance},
journal = {Bird Study},
year = {2009},
volume = {56},
pages = {298--309}
}
|
|||||
| Stanley, T. & Royle, J. | 2005 | Estimating site occupancy and abundance using indirect detection indices | Journal of Wildlife Management 69:874--883 | ||
| Abstract: Knowledge of factors influencing animal distribution and abundance is essential in many areas of ecological research, management, and policy-making. Because common methods for modeling and estimating abundance (e.g., capture-recapture, distance sampling) are sometimes not practical for large areas or elusive species, indices are sometimes used as surrogate measures of abundance. We present an extension of the Royle and Nichols (2003) generalization of the MacKenzie et al. (2002) site-occupancy model that incorporates length of the sampling interval into the model for detection probability. As a result, we obtain a modeling framework that shows how useful information can be extracted from a class of index methods we call indirect detection indices (IDIs). Examples of IDIs include scent station, tracking tube, snow track, tracking plate, and hair snare surveys. Our model is maximum likelihood, and it can be used to estimate site occupancy and model factors influencing patterns of occupancy and abundance in space. Under certain circumstances, it can also be used to estimate abundance. We evaluated model properties using Monte Carlo simulations and illustrate the method with tracking tube and scent station data. We believe this model will be a useful tool for determining factors that influence animal distribution and abundance. | |||||
BibTeX:
@article{Stanley2005,
author = {Stanley, T.R. and Royle, J.A.},
title = {Estimating site occupancy and abundance using indirect detection indices},
journal = {Journal of Wildlife Management},
year = {2005},
volume = {69},
number = {3},
pages = {874--883}
}
|
|||||
| Stapp, P. & Guttilla, D. A. | 2006 | Population density and habitat use of mule deer (Odocoilus hemionus) on Santa Catalina Island, California [BibTeX] |
The Southwestern Naturalist 51:572-578 | ||
BibTeX:
@article{Stapp2006,
author = {Stapp, P. and Guttilla, Darcee A.},
title = {Population density and habitat use of mule deer (\textit{Odocoilus hemionus}) on {Santa Catalina Island, California}},
journal = {The Southwestern Naturalist},
year = {2006},
volume = {51},
pages = {572-578}
}
|
|||||
| Stedman, R., Diefenbach, D., Swope, C., Finley, J., Luloff, A., Zinn, H., San Julian, G. & Wang, G. | 2004 | Integrating wildlife and human-dimensions research methods to study hunters | Journal of Wildlife Management 68:762--773 | ||
| Abstract: Recreational hunting is the primary management tool used by natural resource agencies to control ungulate populations. Although free-ranging ungulates have been studied extensively in North America, relatively little is known about the field behavior of hunters or the factors that influence hunting behavior, except on small study areas where access is limited and controlled. We developed 3 integrated protocols to estimate hunter density, distribution, movements, habitat use, characteristics, and attitudes, which can be used on large areas with unrestricted access. We described how aerial surveys, in conjunction with distance sampling techniques and a Geographic Information System (GIS) database of landscape characteristics, provide estimates of hunter density and a map of hunter distribution and habitat use. We used Global Positioning System (GPS) units issued to hunters to systematically record hunter locations. Hunters also completed a simple questionnaire. We linked these data and used them to obtain detailed information on habitat use, movements, and activity patterns. Whereas aerial surveys are limited to discrete points in time and relate only to aggregations of hunters, data collected on hunters that carry GPS units can be used to study habitat use and distribution at different times of day for individual hunters. Finally, linked responses from a traditional mail or telephone survey to hunter location data collected via GPS units to assess how hunter characteristics (e.g., age, physical condition, attitudes) were related to field behavior. We applied these techniques during a white-tailed deer (Odocoileus virginianus) hunting season on a large tract (45,749 ha) of public land in Pennsylvania, USA, with unrestricted hunter access. We estimated density of 7 hunters/1,000 ha (95% CI: 4.2 to 10.3) in the morning and 6.3 hunters/1,000 ha (95% CI: 3.5 to 10.0) in the afternoon. We found that hunter density was negatively related to distance from roads and slope. Most hunters preferred stand hunting, especially in the early morning hours (0600-0800 hr; 72% stationary); more walked or stalked in the afternoon (1400-1600 hr; 58% stationary). The average maximum distance hunters reached from a road open to public vehicles was 0.84 km (SE = 0.03), and they walked an average of 5.48 km (SE = 0.193) during their daily hunting activities. We believe that the approaches we used for studying hunter behavior will be useful for understanding the connections between hunter attitudes and behavior and hence will allow managers to predict hunter response to changes in harvest regulations. Furthermore, our methods are more accurate than requesting hunters to self-report where they hunted. For example, we found that hunters reported that they walked >2.5 times farther from the nearest road (x? = 2.23 km, SE = 0.13) than actual distance recorded via GPS units (x? = 0.84 km, SE = 0.03). Our research provides wildlife managers with new knowledge on several levels. At the most basic level, we learned a great deal about what hunters actually do while in the field, rather than simply what they report. Second, linking field behavior with hunter characteristics will provide insights into the likely effects of changing hunter demographics. Finally, linking these data with traditional human-dimensions research topics, such as attitudes toward hunting regulations, may allow managers to better forecast the potential effects of regulation changes on hunter distribution and effort. | |||||
BibTeX:
@article{Steetal04,
author = {Stedman, R. and Diefenbach, D.R. and Swope, C.B. and Finley, J.C. and Luloff, A.E. and Zinn, H.C. and San Julian, G.J. and Wang, G.A.},
title = {Integrating wildlife and human-dimensions research methods to study hunters},
journal = {Journal of Wildlife Management},
year = {2004},
volume = {68},
number = {4},
pages = {762--773}
}
|
|||||
| Steinhorst, R. K. & Samuel, M. D. | 1989 | Sightability adjustment methods for aerial surveys of wildlife populations [BibTeX] |
Biometrics 45:415--425 | ||
BibTeX:
@article{SteSam89,
author = {Steinhorst, R. K. and Samuel, M. D.},
title = {Sightability adjustment methods for aerial surveys of wildlife populations},
journal = {Biometrics},
year = {1989},
volume = {45},
pages = {415--425}
}
|
|||||
| Stephens, P., D'Sa, C., Sillero-Zubiri, C. & Leader-Williams, N. | 2001 | Impact of livestock and settlement on the large mammalian wildlife of Bale Mountains National Park, southern Ethiopia | Biological Conservation 100:307--322 | ||
| Abstract: Large mammals, both wild and domestic, were censused in four study areas in Bale Mountains National Park (BMNP), southern Ethiopia, from April until August 1997, using established road counts, horse-back counts and systematic transects, a new approach to censusing large mammals in BMNP. Data collected since 1983 were also examined to indicate trends in mammalian abundance. Civil unrest following the government changeover in 1991 disrupted management of BMNP, leading to an increase in human settlement and livestock densities. The effect of these factors on BMNP's wildlife is assessed and discussed. Most large mammalian wildlife has declined since 1983 but signs of recovery for some species in recent years are positive. The fates of two charismatic endemics are emphasised. BMNP's current population of mountain nyala (Tragelaphus buxtoni, an endangered antelope) was estimated to be between 1100 and 1300. This is lower than estimates for the late 1980s, but shows an increase from very low levels recorded following social turmoil during the government changeover in 1991. Data on the Ethiopian wolf (Canis simensis, a critically endangered canid) also indicate positive trends in abundance, following severe declines between 1989 and 1992 due to rabies epizootics. Action to reduce human utilisation of parts of BMNP is urgently required to prevent further degradation of the environment and to safeguard the future of both the mountain nyala and Ethiopian wolf. © 2001 Elsevier Science Ltd. All rights reserved. | |||||
BibTeX:
@article{Stephens2001,
author = {Stephens, P.A. and D'Sa, C.A. and Sillero-Zubiri, C. and Leader-Williams, N.},
title = {Impact of livestock and settlement on the large mammalian wildlife of Bale Mountains National Park, southern Ethiopia},
journal = {Biological Conservation},
year = {2001},
volume = {100},
number = {3},
pages = {307--322}
}
|
|||||
| Stoate, C., Borralho, R. & Araújo, M. | 2000 | Factors affecting corn bunting Miliaria calandra abundance in a Portuguese agricultural landscape | Agriculture, Ecosystems and Environment 77:219--226 | ||
| Abstract: Breeding and wintering abundance of corn buntings in an agricultural landscape of Alentejo (southern Portugal) was assessed in relation to agricultural intensification and other environmental variables during 1994-1997, using distance sampling and multivariate regression. Bird abundance was lowest in intensively managed farmland in both seasons, and was related positively to fallow area in winter and to the presence of game management and oats in spring. Fallows and oats were associated with extensively managed farmland, but the implementation of a managed hunting regime was unrelated to agricultural intensification. The importance of extensive arable systems to corn bunting conservation is discussed. | |||||
BibTeX:
@article{Stoate2000,
author = {Stoate, C. and Borralho, R. and Araújo, M.},
title = {Factors affecting corn bunting \textit{Miliaria calandra} abundance in a Portuguese agricultural landscape},
journal = {Agriculture, Ecosystems and Environment},
year = {2000},
volume = {77},
number = {3},
pages = {219--226}
}
|
|||||
| Stoyan, D. | 1982 | A remark on the line transect method [BibTeX] |
Biometrical Journal 24:191--195 | ||
BibTeX:
@article{Sto82,
author = {Stoyan, D.},
title = {A remark on the line transect method},
journal = {Biometrical Journal},
year = {1982},
volume = {24},
pages = {191--195}
}
|
|||||
| Strindberg, S. | 2001 | Optimized Automated Survey Design in Wildlife Population Assessment [BibTeX] |
: | ||
BibTeX:
@phdthesis{Str01,
author = {Strindberg, S.},
title = {Optimized Automated Survey Design in Wildlife Population Assessment},
school = {University of St Andrews},
year = {2001}
}
|
|||||
| Strindberg, S. & Buckland, S. T. | 2004 | Zigzag survey designs in line transect sampling [BibTeX] |
Journal of Agricultural, Biological, and Environmental Statistics 9:443-461 | ||
BibTeX:
@article{StrBuc04,
author = {Strindberg, S. and Buckland, S. T.},
title = {Zigzag survey designs in line transect sampling},
journal = {Journal of Agricultural, Biological, and Environmental Statistics},
year = {2004},
volume = {9},
pages = {443-461}
}
|
|||||
| Strindberg, S., Buckland, S. T. & Thomas, L. | 2004 | Design of distance sampling surveys and Geographic Information Systems [BibTeX] |
Advanced Distance Sampling :190-228 | ||
BibTeX:
@incollection{Strin2004,
author = {Strindberg,S. and Buckland, S. T. and Thomas, L.},
title = {Design of distance sampling surveys and Geographic Information Systems},
booktitle = {Advanced Distance Sampling},
publisher = {Oxford University Press},
year = {2004},
pages = {190-228}
}
|
|||||
| Summers, R. W., Mavor, R. A., Buckland, S. T. & MacLennan, A. M. | 1999 | Winter population size and habitat selection by crested tits Parus cristatuss in Scotland [BibTeX] |
Bird Study 46:230--242 | ||
BibTeX:
@article{Sum99,
author = {Summers, R. W. and Mavor, R. A. and Buckland, S. T. and MacLennan, A. M.},
title = {Winter population size and habitat selection by crested tits \emph{ {P}arus cristatus} in {S}cotland},
journal = {Bird Study},
year = {1999},
volume = {46},
pages = {230--242}
}
|
|||||
| Swann, D., Averill-Murray, R. & Schwalbe, C. | 2002 | Distance sampling for Sonoran Desert tortoises | Journal of Wildlife Management 66:969--975 | ||
| Abstract: We used line transects and distance sampling in combination with radiotelemetry to estimate density of a desert tortoise (Gopherus agassizii) population in the Rincon Mountains near Tucson, Arizona, USA, as part of a long-term study evaluating the impact of urban development on tortoises. During 2000, 34 1-km transects were each sampled twice in the 368.5-ha study area. We observed 46 tortoises with midline carapace lengths ?150 mm (subadults and adults) plus 7 juveniles on transects. For subadults and adults, the encounter rate was 0.63 tortoises/km, and the mean proportion of tortoises observable during radiotelemetry, conducted concurrently with transect sampling, was 82%. Corrected mean density based on line transects and radiotelemetry was 0.523 tortoises/ha (CV = 22.99, 95% CI = 0.29-0.79), and absolute abundance in the study area was estimated to be 193 (CV = 23.0%, CI = 107-291). Using the 2 independent coverages of transects as separate samples, the Lincoln-Petersen mark-recapture estimator produced an abundance estimate of 224 subadult and adult tortoises (CV = 53.9%, CI = 72-440). Transects measured on the ground over uneven topography resulted in 3% smaller estimates of density when compared to analysis with transect lengths determined from coordinates plotted on a map. Distance sampling appears to be a feasible method of estimating density of Sonoran Desert populations of the desert tortoise, but transect lengths should be based on mapped rather than measured distances to prevent biases caused by uneven topography. | |||||
BibTeX:
@article{Swann2002,
author = {Swann, D.E. and Averill-Murray, R.C. and Schwalbe, C.R.},
title = {Distance sampling for Sonoran Desert tortoises},
journal = {Journal of Wildlife Management},
year = {2002},
volume = {66},
number = {4},
pages = {969--975}
}
|
|||||
| Swartz, S. L., Martinez, A., Cole, T., Clapham, P. J., McDonald, M. A., Hildebrand, J. A., Oleson, E. M., Burks, C. & Barlow, J. | 2001 | Visual and acoustic survey of humpback whales (Megaptera novaeangliae) in the Eastern and Southern Caribbean Sea: preliminary findings [BibTeX] |
: | ||
BibTeX:
@techreport{Swartz2001,
author = {Steven L. Swartz and Anthony Martinez and Tim Cole and Phillip J. Clapham and Mark A. McDonald and John A. Hildebrand and Erin M. Oleson and Carolyn Burks and Jay Barlow},
title = {Visual and acoustic survey of humpback {whales (\textit{Megaptera novaeangliae}) in the Eastern and Southern Caribbean Sea: preliminary findings}},
year = {2001},
number = {NMFS-SEFSC-456}
}
|
|||||
| Szaro, R. C. & Jakle, M. D. | 1982 | Comparison of variable circular-plot and spot-map methods in desert riparian and scrub habitat [BibTeX] |
Wilson Bulletin 94:546--50 | ||
BibTeX:
@article{SzaJak82,
author = {Szaro, R. C. and Jakle, M. D.},
title = {Comparison of variable circular-plot and spot-map methods in desert riparian and scrub habitat},
journal = {Wilson Bulletin},
year = {1982},
volume = {94},
pages = {546--50}
}
|
|||||
| Tanner, R. & Gange, A. | 2005 | Effects of golf courses on local biodiversity [BibTeX] |
Landscape and Urban Planning 71:137--146 | ||
BibTeX:
@article{Tanner2005,
author = {Tanner, R.A. and Gange, A.C.},
title = {Effects of golf courses on local biodiversity},
journal = {Landscape and Urban Planning},
year = {2005},
volume = {71},
number = {2-4},
pages = {137--146}
}
|
|||||
| Tarvin, K. A., Garvin, M. C., Jawor, J. M. & Dayer, K. A. | 1998 | A field evaluation of techniques used to estimate density of Blue Jays [BibTeX] |
Journal of Field Ornithology 69:209--222 | ||
BibTeX:
@article{Taretal98,
author = {Tarvin, K. A. and Garvin, M. C. and Jawor, J. M. and Dayer, K. A.},
title = {A field evaluation of techniques used to estimate density of {B}lue {J}ays},
journal = {Journal of Field Ornithology},
year = {1998},
volume = {69},
pages = {209--222}
}
|
|||||
| Tasker, M. L., Hope Jones, P., Dixon, T. & Blake, B. F. | 1984 | Counting seabirds at sea from ships: a review of methods employed and a suggestion for a standardized approach [BibTeX] |
The Auk 101:567--577 | ||
BibTeX:
@article{Tasetal84,
author = {Tasker, M. L. and Hope Jones, P. and Dixon, T. and Blake, B. F.},
title = {Counting seabirds at sea from ships: a review of methods employed and a suggestion for a standardized approach},
journal = {The Auk},
year = {1984},
volume = {101},
pages = {567--577}
}
|
|||||
| Thirgood, S. J., Leckie, F. M. & Redpath, S. M. | 1995 | Diurnal and seasonal variation in line transect counts of moorland passerines [BibTeX] |
Bird Study 42:257--259 | ||
BibTeX:
@article{Thietal95,
author = {Thirgood, S. J. and Leckie, F. M. and Redpath, S. M.},
title = {Diurnal and seasonal variation in line transect counts of moorland passerines},
journal = {Bird Study},
year = {1995},
volume = {42},
pages = {257--259}
}
|
|||||
| Thomas, L. | 1999 | Distance 3.5 [BibTeX] |
Bulletin of the Ecological Society of America 80:114-115 | ||
BibTeX:
@article{Thomas1999,
author = {Thomas, L.},
title = {Distance 3.5},
journal = {Bulletin of the Ecological Society of America},
year = {1999},
volume = {80},
pages = {114-115}
}
|
|||||
| Thomas, L., Buckland, S. T., Burnham, K. P., Anderson, D. R., Laake, J. L., Borchers, D. L. & Strindberg, S. | 2002 | Distance sampling [BibTeX] |
Encyclopedia of Environmetrics I:544--552 | ||
BibTeX:
@incollection{Thomas2002,
author = {Thomas, L and Buckland, S T and Burnham, K P and Anderson, D R and Laake, J L and Borchers, D L and Strindberg, S},
title = {Distance sampling},
booktitle = {Encyclopedia of Environmetrics},
publisher = {John Wiley and Sons},
year = {2002},
volume = {I},
pages = {544--552}
}
|
|||||
| Thomas, L., Buckland, S. T., Rexstad, E. A., Laake, J. L., Strindberg, S., Hedley, S. L., Bishop, J. R., Marques, T. A. & Burnham, K. P. | 2010 | Distance software: design and analysis of distance sampling surveys for estimating population size [BibTeX] |
Journal of Applied Ecology 47:5--14 | DOI PDF | |
BibTeX:
@article{Thomas2010,
author = {Len Thomas and Stephen T. Buckland and Eric A. Rexstad and Jeff L. Laake and Samantha Strindberg and Sharon L. Hedley and Jon R.B. Bishop and Tiago A. Marques and Kenneth P. Burnham},
title = {Distance software: design and analysis of distance sampling surveys for estimating population size},
journal = {Journal of Applied Ecology},
year = {2010},
volume = {47},
pages = {5--14},
doi = {10.1111/j.1365-2664.2009.01737.x}
}
|
|||||
| Thomas, L., Laake, J., Rexstad, E., Strindberg, S., Marques, F., Buckland, S., Borchers, D., Anderson, D., Burnham, K., Burt, M., Hedley, S., Pollard, J., Bishop, J. & Marques, T. | 2009 | Distance 6.0. Release 1 [BibTeX] |
: | ||
BibTeX:
@booklet{Thomas2006a,
author = {Thomas, L., and Laake, J.L. and Rexstad, E. and Strindberg, S. and Marques, F.F.C. and Buckland, S.T and Borchers, D.L. and Anderson, D.R. and Burnham, K.P. and Burt, M.L. and Hedley, S.L. and Pollard, J.H. and Bishop, J.R.B. and Marques, T.A.},
title = {Distance 6.0. Release 1},
year = {2009}
}
|
|||||
| Thomas, L., Laake, J. L., Derry, J. F., Buckland, S. T., Borchers, D. L., Anderson, D. R., Burnham, K. P., Strindberg, S., Hedley, S. L., Marques, F. F. C., Pollard, J. H. & Fewster, R. M. | 2002 | Distance 3.5 [BibTeX] |
: | ||
BibTeX:
@booklet{D35,
author = {Thomas, L. and Laake, J. L. and Derry, J. F. and Buckland, S. T. and Borchers, D. L. and Anderson, D. R. and Burnham, K. P. and Strindberg, S. and Hedley, S. L. and Marques, F. F. C. and Pollard, J. H. and Fewster, R. M.},
title = {Distance 3.5},
year = {2002}
}
|
|||||
| Thomas, L., Laake, J. L., Strindberg, S., Marques, F. F. C., Buckland, S. T., Borchers, D. L., Anderson, D. R., Burnham, K. P., Hedley, S. L., Pollard, J. H., Bishop, J. R. B. & Marques, T. A. | 2006 | Distance 5.0 [BibTeX] |
: | ||
BibTeX:
@booklet{D5,
author = {Thomas, L. and Laake, J. L. and Strindberg, S. and Marques, F. F. C. and Buckland, S. T. and Borchers, D. L. and Anderson, D. R. and Burnham, K. P. and Hedley, S. L. and Pollard, J. H. and Bishop, J. R. B. and Marques, T. A.},
title = {Distance 5.0},
year = {2006}
}
|
|||||
| Thomas, L., Laake, J. L., Strindberg, S., Marques, F. F. C., Buckland, S. T., Borchers, D. L., Anderson, D. R., Burnham, K. P., Hedley, S. L., Pollard, J. H., Bishop, J. R. B. & Marques, T. A. | 2005 | Distance 5.0. Beta 4 [BibTeX] |
: | ||
BibTeX:
@booklet{D5b4,
author = {Thomas, L. and Laake, J. L. and Strindberg, S. and Marques, F. F. C. and Buckland, S. T. and Borchers, D. L. and Anderson, D. R. and Burnham, K. P. and Hedley, S. L. and Pollard, J. H. and Bishop, J. R. B. and Marques, T. A.},
title = {Distance 5.0. Beta 4},
year = {2005}
}
|
|||||
| Thomas, L., Laake, J. L., Strindberg, S., Marques, F. F. C., Buckland, S. T., Borchers, D. L., Burnham, K. P., Hedley, S. L. & Pollard, J. H. | 2002 | Distance 4.0. Release 2 [BibTeX] |
: | ||
BibTeX:
@booklet{D4,
author = {Thomas, L. and Laake, J. L. and Strindberg, S. and Marques, F. F. C. and Buckland, S. T., and Borchers, D. L. and Burnham, K. P. and Hedley, S. L. and Pollard, J. H.},
title = {Distance 4.0. Release 2},
year = {2002}
}
|
|||||
| Thomas, L., Williams, R. & Sandilands, D. | 2007 | Designing line transect surveys for complex survey regions [BibTeX] |
Journal of Cetacean Research and Management 9:1--13 | ||
BibTeX:
@article{Thomas2007,
author = {Len Thomas and Rob Williams and Doug Sandilands},
title = {Designing line transect surveys for complex survey regions},
journal = {Journal of Cetacean Research and Management},
year = {2007},
volume = {9},
pages = {1--13}
}
|
|||||
| Thomas, S. C. | 1991 | Population densities and patterns of habitat use among anthropoid primates of the Ituri Forest, Zaire [BibTeX] |
Biotropica 23:68--83 | ||
BibTeX:
@article{Tho91,
author = {Thomas, S. C.},
title = {Population densities and patterns of habitat use among anthropoid primates of the {I}turi {F}orest, {Z}aire},
journal = {Biotropica},
year = {1991},
volume = {23},
pages = {68--83}
}
|
|||||
| Thompson, D. & Hiby, A. R. | 1985 | The use of scale binoculars for distance estimation and a time lapse camera for angle estimation during the 1983/84 IDCR minke whale assessment cruise [BibTeX] |
Reports of the International Whaling Commission 35:309--314 | ||
| Review: distances of 1-1.5 miles commonly estimated to be in the 2.5-3 miles range (they say maybe just a problem in the experiment?, see pag 310, top right) | |||||
BibTeX:
@article{Thompson1985,
author = {Thompson, D and Hiby, A R},
title = {The use of scale binoculars for distance estimation and a time lapse camera for angle estimation during the 1983/84 {IDCR} minke whale assessment cruise},
journal = {Reports of the International Whaling Commission},
year = {1985},
volume = {35},
pages = {309--314}
}
|
|||||
| Thompson, M. E., Schwager, S. J., Payne, K. B. & Turkalo, A. K. | 2009 | Acoustic estimation of wildlife abundance: methodology for vocal mammals in forested habitats [BibTeX] |
African Journal of Ecology 48:654--661 | DOI | |
BibTeX:
@article{Thompson2009,
author = {Mya E. Thompson and Steven J. Schwager and Katharine B. Payne and Andrea K. Turkalo},
title = {Acoustic estimation of wildlife abundance: methodology for vocal mammals in forested habitats},
journal = {African Journal of Ecology},
year = {2009},
volume = {48},
pages = {654--661},
doi = {10.1111/j.1365-2028.2009.01161.x}
}
|
|||||
| Thompson, S. K. & Ramsey, F. L. | 1987 | Detectability functions in observing spatial point processes [BibTeX] |
Biometrics 43:355--362 | ||
BibTeX:
@article{ThoRam87,
author = {Thompson, S. K. and Ramsey, F. L.},
title = {Detectability functions in observing spatial point processes},
journal = {Biometrics},
year = {1987},
volume = {43},
pages = {355--362}
}
|
|||||
| Thompson, S. K. & Seber, G. A. F. | 1994 | Detectability in conventional and adaptive sampling [BibTeX] |
Biometrics 50:712--724 | ||
BibTeX:
@article{ThoSeb94,
author = {Thompson, S. K. and Seber, G. A. F.},
title = {Detectability in conventional and adaptive sampling},
journal = {Biometrics},
year = {1994},
volume = {50},
pages = {712--724}
}
|
|||||
| Thompson, W. | 2003 | Hankin and Reeves' approach to estimating fish abundance in small streams: Limitations and alternatives [BibTeX] |
Transactions of the American Fisheries Society 132:69--75 | ||
BibTeX:
@article{Thompson2003,
author = {Thompson, W.L.},
title = {Hankin and Reeves' approach to estimating fish abundance in small streams: Limitations and alternatives},
journal = {Transactions of the American Fisheries Society},
year = {2003},
volume = {132},
number = {1},
pages = {69--75}
}
|
|||||
| Thompson, W. L. | 2002 | Towards reliable bird surveys: accounting for individuals present but not detected [BibTeX] |
The Auk 119:18--25 | ||
BibTeX:
@article{Tho2002,
author = {Thompson, W. L.},
title = {Towards reliable bird surveys: accounting for individuals present but not detected},
journal = {The Auk},
year = {2002},
volume = {119},
pages = {18--25}
}
|
|||||
| Thomsen, F., Laczny, M. & Piper, W. | 2006 | A recovery of harbour porpoises (Phocoena phocoena) in the southern North Sea? A case study off Eastern Frisia, Germany | Helgoland Marine Research 60:189--195 | ||
| Abstract: Detailed information on year-round distribution, seasonal abundance and inter-annual trends of a given species is essential for any conservation effort. However, for most odontocetes this knowledge is rather limited. Therefore, area-specific management or conservation plans are often difficult to argue for. This is also true for the harbour porpoise (Phocoena phocoena), although it is the most common cetacean species in the North Sea. Knowledge of the current status of local stocks as well as fine scale information on the temporal use of certain areas by the species is incomplete. One area of concern is the southern North Sea where the abundance of harbour porpoises has declined in the twentieth century. Recent studies using stranding data and observations from seabird surveys indicate a comeback of the species along the Dutch and Belgian coast. However, data on other regions of the southern North Sea is sparse. Between 2002 and 2004, we undertook 25 aerial line transect surveys (11,000 km on effort; altitude = 250 and 600 ft) in a 2,500 km2 coastal area off Eastern Frisia, Germany including a small portion of Dutch coastal waters. The data were g(0) corrected using a double platform approach and analysed with distance sampling software. A total of 426 harbour porpoises were sighted, including eight calves. Densities ranged between <0.1 and 1.62 individuals/km2 with peaks in February and July 2003 as well as February and May 2004. The results of our study show that harbour porpoises are present in the coastal part of the southern North Sea even during their reproductive period. However, they seem to appear in lower numbers and much more irregular than in other areas, for example off Northern Frisia. The results of this study support the recent findings that despite a decline in the mid-twentieth century, harbour porpoises are now at times quite abundant in the southern North Sea. The underlying factors of this 'return' should be investigated using a combination of surveys and satellite telemetry. © Springer-Verlag and AWI 2006. | |||||
BibTeX:
@article{Thomsen2006,
author = {Thomsen, F. and Laczny, M. and Piper, W.},
title = {A recovery of harbour porpoises \textit{(Phocoena phocoena)} in the southern North Sea? A case study off Eastern Frisia, Germany},
journal = {Helgoland Marine Research},
year = {2006},
volume = {60},
number = {3},
pages = {189--195}
}
|
|||||
| Tianbiao, Z., Xinmin, L., Zhongbing, Z., Chunfu, Z. & Lin, Q. | 1998 | Studies on the spatial patterns of the populations of Rhombomys opimus and Meriones meridianus | Acta Theriologica Sinica 18:131--136 | ||
| Abstract: The spatial patterns of the populations of great gerbil Rhombomys opimus and mid-day gerbil Meriones meridianus in Tengenor area of Damaolianheqi Banner were studied during the period from October 1995 to October 1996. There were analyzed by means of the nearest individual, T-distance sampling and negative binomial distribution. The results were shown that Rhombomys opinus is in a state of collecting distribution around the all year but Meriones meridianus is of even distribution in summer. Collecting or even distribution is the states in winter but remarkably collecting distribution in summer between both populations shows negative relative in winter but positive one in summer. | |||||
BibTeX:
@article{Tianbiao1998,
author = {Tianbiao, Zhao and Xinmin, Li and Zhongbing, Zhang and Chunfu, Zhang and Lin, Qi},
title = {Studies on the spatial patterns of the populations of \textit{Rhombomys opimus} and \textit{Meriones meridianus}},
journal = {Acta Theriologica Sinica},
year = {1998},
volume = {18},
number = {2},
pages = {131--136}
}
|
|||||
| Tilghman, N. G. & Rusch, D. H. | 1981 | Comparison of line-transect methods for estimating breeding bird densities in deciduous woodlots [BibTeX] |
Estimating Numbers of Terrestrial Birds :202--208 | ||
BibTeX:
@incollection{TilRus81,
author = {Tilghman, N. G. and Rusch, D. H.},
title = {Comparison of line-transect methods for estimating breeding bird densities in deciduous woodlots},
booktitle = {Estimating Numbers of Terrestrial Birds},
publisher = {Cooper Ornithological Society},
year = {1981},
number = {6},
pages = {202--208}
}
|
|||||
| Tobias, J. & Seddon, N. | 2002 | Estimating population size in the subdesert mesite (Monias benschi): New methods and implications for conservation | Biological Conservation 108:199--212 | ||
| Abstract: The subdesert mesite, a terrestrial non-passerine bird endemic to the Mikea Forest of southwest Madagascar, is currently classified as globally threatened (category: Vulnerable). However, accurate assessment of threat in accordance with the IUCN Red List criteria (A, B and C) requires data on effective population size, area of habitat occupied and rate of decline, none of which is available for this species. Here we present the first empirical estimates of its population size using five complementary methods, three incorporating data on territory size and two using data gathered during call-playback surveys conducted throughout its entire global range. Estimates vary from 98,000 to 152,000 individuals, with the most reliable possibly being that generated by distance sampling (115,000). This figure is more than an order of magnitude greater than the only published estimate of <10,000 individuals. By analysing data on forest cover change, we estimate the population of the subdesert mesite to have declined by, at most, 10% in three generations. Although the rate of deforestation in 1994-1999 is double that calculated for 1962-1994, it is deemed unlikely that the population will decline by 20% over the next three generations. As such the species fails to meet criterion A. Although the subdesert mesite's range and area of occupancy are small, they are not fragmented and do not comprise fewer than 10 locations. Consequently, this species does not meet criterion B. Further, the species fails to meet criterion C, for which a maximum of 10,000 mature adults is required. According to IUCN (2000 Red List of Threatened Species) this species should therefore be downlisted in status. We discuss why it still warrants conservation attention and suggest the need for modifications to the criteria thresholds in relation to basic information about the ecology and taxonomic distinctness of species. © 2002 Elsevier Science Ltd. All rights reserved. | |||||
BibTeX:
@article{Tobias2002,
author = {Tobias, J.A. and Seddon, N.},
title = {Estimating population size in the subdesert mesite \textit{(Monias benschi)}: New methods and implications for conservation},
journal = {Biological Conservation},
year = {2002},
volume = {108},
number = {2},
pages = {199--212}
}
|
|||||
| Tomiatojc, L. & Verner, J. | 1990 | Do point counts and spot mapping produce equivalent estimates of bird densities? [BibTeX] |
The Auk 107:447--450 | ||
BibTeX:
@article{TomVer90,
author = {Tomiatojc, L. and Verner, J.},
title = {Do point counts and spot mapping produce equivalent estimates of bird densities?},
journal = {The Auk},
year = {1990},
volume = {107},
pages = {447--450}
}
|
|||||
| Tomás, W. M., McShea, W., de Miranda, G. H. B., Moreira, J. R., Mourão, G. & Lima Borges, P. A. | 2001 | A survey of a pampas deer, Ozotoceros bezoarticus leucogaster (Arctiodactyla, Cervidae), population in the Pantanal wetland, Brazil, using the distance sampling technique | Animal Biodiversity and Conservation 24:101--106 | ||
| Abstract: The pampas deer is an endangered South American species which occurs in open grasslands and savannas. This aim of this survey was to evaluate the use of the distance sampling technique to estimate densities of the species in the Pantanal wetland, as well as to analyze the applicability of the method for a monitoring program. The surveys were conducted on roads from vehicles and also on foot along 26 parallel transects in November 1999 and 2000 at Campo Dora ranch, south-central Pantanal, Brazil. Deer densities were estimated using the program DISTANCE, and the program MONITOR was used to run a power analysis to estimate the probability of detection of a decline in the population. The deer density estimated from vehicles, with data from both years, was 9.81±3.8 individual/km2, and 5.53±0.68 individuals/km2 from transects sampled on foot. The power analysis of these data revealed a monitoring program would require at least two surveys per year over seven years to obtain a 90% chance of detecting a 5% decline in the population. Our results also indicate surveys from roads are not recommended for pampas deer counts as the animals appear to keep a relatively safe distance from cars. | |||||
| Review: Refere um trabalho interessante porque usa estradas para fazer os transectos RODRIGUES, F. H. G., 1996. História Natural e Biologia Comentários brilhantes sobre o porquê de não usar uma estrada. |
|||||
BibTeX:
@article{Tomas2001,
author = {Tomás, W. M. and McShea, W. and de Miranda, G. H. B. and Moreira, J. R. and Mourão, G. and Lima Borges, P. A.},
title = {A survey of a pampas deer, \textit{Ozotoceros bezoarticus leucogaster}{ (Arctiodactyla, Cervidae), population in the Pantanal wetland, Brazil, using the distance sampling technique}},
journal = {Animal Biodiversity and Conservation},
year = {2001},
volume = {24},
pages = {101--106}
}
|
|||||
| Tougaard, J. | 2010 | Radial distance sapling with passive acoustics: the prospect of estimating absolute densities of cetaceans from static acoustic datalogger data [BibTeX] |
Journal of the Acoustical Society of America 123:3100 | ||
BibTeX:
@article{Tougaard2010,
author = {Tougaard, J.},
title = {Radial distance sapling with passive acoustics: the prospect of estimating absolute densities of cetaceans from static acoustic datalogger data},
journal = {Journal of the Acoustical Society of America},
year = {2010},
volume = {123},
pages = {3100}
}
|
|||||
| Trenkel, V. M., Buckland, S. T., McLean, C. & Elston, D. A. | 1997 | Evaluation of aerial line transect methodology for estimating red deer (Cervus elaphus) abundance in Scotland [BibTeX] |
Journal of Environmental Management 50:39-50 | ||
BibTeX:
@article{Treenal97,
author = {Trenkel, V. M. and Buckland, S. T. and McLean, C. and Elston, D. A.},
title = {Evaluation of aerial line transect methodology for estimating red deer (\emph{{C}ervus elaphus}) abundance in {S}cotland},
journal = {Journal of Environmental Management},
year = {1997},
volume = {50},
pages = {39-50}
}
|
|||||
| Treydte, A., Edwards, P. & Suter, W. | 2005 | Shifts in native ungulate communities on a former cattle ranch in Tanzania | African Journal of Ecology 43:302--311 | ||
| Abstract: When an area is brought under protection, current animal populations and their habitat preferences need to be assessed to predict population trends and future habitat availability. Using data from walking transects, we estimated the size of native ungulate populations on an abandoned cattle ranch in a coastal savannah in Tanzania, now included in the new Saadani National Park. Data were analysed with DISTANCE sampling and conventional strip transect techniques and were compared with results of previous wildlife counts. Few individuals of mainly browsing species were present in former cattle grazing areas exhibiting high bush-encroachment while a ten times higher biomass of browsers and grazers was found in the cattle-unmodified savannah. Population sizes of some species increased twofold between 1991 and 2001 within the entire area but neither population size nor species richness increased in the abandoned rangeland during our 3-year study period from 2001 to 2003. We conclude that the former ranch has potential for future recolonization by wild ungulates. Resettlement will take place gradually with 'pioneer-species' facilitating the entry of more demanding species. Habitat restoration through wildlife can be observed and quantified on Mkwaja Ranch which will be of importance for future management of native ungulates reclaiming abandoned rangeland. © 2005 African Journal of Ecology. | |||||
BibTeX:
@article{Treydte2005,
author = {Treydte, A.C. and Edwards, P.J. and Suter, W.},
title = {Shifts in native ungulate communities on a former cattle ranch in Tanzania},
journal = {African Journal of Ecology},
year = {2005},
volume = {43},
number = {4},
pages = {302--311}
}
|
|||||
| Trolle, M., Noss, A. J., Cordeiro, J. L. P. & Oliveira, L. F. B. | 2007 | Brazilian tapir density in the Pantanal: a comparison of systematic camera-trapping and line-transect surveys [BibTeX] |
Biotropica 40:211--217 | ||
BibTeX:
@article{Trolle2007,
author = {Mogens Trolle and Andrew J. Noss and José Luis Passos Cordeiro and Luiz Flamarion B. Oliveira},
title = {Brazilian tapir density in the {Pantanal}: a comparison of systematic camera-trapping and line-transect surveys},
journal = {Biotropica},
year = {2007},
volume = {40},
pages = {211--217}
}
|
|||||
| Turner, F. B. & Medica, P. A. | 1982 | The distribution and abundance of flat-tailed horned lizard (Phrynosoma mcallii) [BibTeX] |
Copeia 4:815--823 | ||
BibTeX:
@article{TurMed82,
author = {Turner, F. B. and Medica, P. A.},
title = {The distribution and abundance of flat-tailed horned lizard (\emph{{P}hrynosoma mcallii})},
journal = {Copeia},
year = {1982},
volume = {4},
pages = {815--823}
}
|
|||||
| Turnock, B. J. & Quinn, II, T. J. | 1991 | The effect of responsive movement on abundance estimation using line transect sampling [BibTeX] |
Biometrics 47:701--716 | ||
BibTeX:
@article{TQ91,
author = {Turnock, B. J. and Quinn, II, T. J.},
title = {The effect of responsive movement on abundance estimation using line transect sampling},
journal = {Biometrics},
year = {1991},
volume = {47},
pages = {701--716}
}
|
|||||
| Underwood, F. M. | 2004 | Design-based Adaptive Monitoring Strategies for Wildlife Population Assessment [BibTeX] |
: | ||
BibTeX:
@phdthesis{Und04,
author = {Underwood, F. M.},
title = {Design-based Adaptive Monitoring Strategies for Wildlife Population Assessment},
school = {University of St Andrews},
year = {2004}
}
|
|||||
| Varman, K. S. & Sukumar, R. | 1995 | The line transect method for estimating densities of large mammals in a tropical deciduous forest: an evaluation of models and field experiments [BibTeX] |
Journal of Bioscience 20:273--287 | ||
BibTeX:
@article{VarSuk95,
author = {Varman, K. S. and Sukumar, R.},
title = {The line transect method for estimating densities of large mammals in a tropical deciduous forest: an evaluation of models and field experiments},
journal = {Journal of Bioscience},
year = {1995},
volume = {20},
pages = {273--287}
}
|
|||||
| Velazquez, A. | 1994 | Distribution and population size of Romerolagus diazi on El Pelado volcano, Mexico [BibTeX] |
Journal of Mammalogy 75:743--749 | ||
BibTeX:
@article{Vel94,
author = {Velazquez, A.},
title = {Distribution and population size of \emph{ {R}omerolagus diazi } on {E}l {P}elado volcano, {M}exico},
journal = {Journal of Mammalogy},
year = {1994},
volume = {75},
pages = {743--749}
}
|
|||||
| Venturato, E., Cavallini, P. & Dessa-Fulgheri, F. | 2010 | Are pheasants attracted or repelled by roads? A test of a crucial assumption for transect censuses [BibTeX] |
European Journal of Wildlife Research 56:233-237 | URL | |
BibTeX:
@article{springerlink:10.1007/s10344-009-0309-9,
author = {Venturato, Emilia and Cavallini, Paolo and Dessa-Fulgheri, Francesco},
title = {Are pheasants attracted or repelled by roads? A test of a crucial assumption for transect censuses},
journal = {European Journal of Wildlife Research},
publisher = {Springer Berlin / Heidelberg},
year = {2010},
volume = {56},
pages = {233-237},
note = {10.1007/s10344-009-0309-9},
url = {http://dx.doi.org/10.1007/s10344-009-0309-9}
}
|
|||||
| Verner, J. | 1985 | Assessment of counting techniques [BibTeX] |
Current Ornithology, Volume 2 :247--302 | ||
BibTeX:
@incollection{Ver85,
author = {Verner, J.},
title = {Assessment of counting techniques},
booktitle = {Current Ornithology, Volume 2},
publisher = {Plenum Press},
year = {1985},
pages = {247--302}
}
|
|||||
| Verner, J. & Ritter, L. V. | 1988 | A comparison of transect and spot mapping in oak--pine woodlands of California [BibTeX] |
Condor 90:401--419 | ||
BibTeX:
@article{VerRit88,
author = {Verner, J. and Ritter, L. V.},
title = {A comparison of transect and spot mapping in oak--pine woodlands of {C}alifornia},
journal = {Condor},
year = {1988},
volume = {90},
pages = {401--419}
}
|
|||||
| Verner, J. & Ritter, L. V. | 1986 | Hourly variation in morning point counts of birds [BibTeX] |
The Auk 103:117--124 | ||
BibTeX:
@article{VerRit86,
author = {Verner, J. and Ritter, L. V.},
title = {Hourly variation in morning point counts of birds},
journal = {The Auk},
year = {1986},
volume = {103},
pages = {117--124}
}
|
|||||
| Verner, J. & Ritter, L. V. | 1985 | A comparison of transects and point counts in oak--pine woodlands of California [BibTeX] |
Condor 87:47--68 | ||
BibTeX:
@article{VerRit85,
author = {Verner, J. and Ritter, L. V.},
title = {A comparison of transects and point counts in oak--pine woodlands of {C}alifornia},
journal = {Condor},
year = {1985},
volume = {87},
pages = {47--68}
}
|
|||||
| Vidal, O., Barlow, J., Hurtado, L. A., Torre, J., Cendon, P. & Ojeda, Z. | 1997 | Distribution and abundance of the Amazon river dolphin (Inia geoffrensis) and the tucuxi (Sotalia fluviatilis) in the Upper Amazon river [BibTeX] |
Marine Mammal Science 13:427--445 | ||
BibTeX:
@article{Videtal97,
author = {Vidal, O. and Barlow, J. and Hurtado, L. A. and Torre, J. and Cendon, P. and Ojeda, Z.},
title = {Distribution and abundance of the {A}mazon river dolphin (\emph{{I}nia geoffrensis}) and the tucuxi (\emph{{S}otalia fluviatilis}) in the {U}pper {A}mazon river},
journal = {Marine Mammal Science},
year = {1997},
volume = {13},
pages = {427--445}
}
|
|||||
| Vilella, F. & Fogarty, J. | 2005 | Diversity and abundance of forest frogs (Anura: Leptodactylidae) before and after Hurricane Georges in the Cordillera Central of Puerto Rico | Caribbean Journal of Science 41:157--162 | ||
| Abstract: Caribbean hurricanes often impact terrestrial vertebrates in forested environments. On 21 September 1998, Hurricane Georges impacted Puerto Rico with sustained winds in excess of 166 km/hr, causing damage to forests of the island's principal mountain range; the Cordillera Central. We estimated forest frog abundance and diversity from call counts conducted along marked transects before and after Hurricane Georges in two forests reserves of the Cordillera Central (Maricao and Guilarte). We used distance sampling to estimate density of Eleutherodactylus coqui and recorded counts of other species. After the hurricane, the abundance of E. coqui increased in both reserves compared to prehurricane levels while abundance of other frog species decreased. In Maricao, relative abundance of E. richmondi (P = 0.013) and E. brittoni (P = 0.034) were significantly lower after the hurricane. Moreover, species richness and evenness of the Maricao and Guilarte frog assemblages declined after the hurricane. Our results on abundance patterns of the forest frog assemblages of Maricao and Guilarte Forests were similar to those reported from the Luquillo Experimental Forest after Hurricane Hugo in September 1989. Long-term demographic patterns of the forest frog assemblages in the Cordillera Central may be associated with changes due to the ecological succession in post-hurricane forests. Copyright 2005 College of Arts and Sciences. | |||||
BibTeX:
@article{Vilella2005,
author = {Vilella, F.J. and Fogarty, J.H.},
title = {Diversity and abundance of forest frogs (Anura: Leptodactylidae) before and after Hurricane Georges in the Cordillera Central of Puerto Rico},
journal = {Caribbean Journal of Science},
year = {2005},
volume = {41},
number = {1},
pages = {157--162}
}
|
|||||
| Víkingsson, G., Pike, D., Desportes, G., Øien, N., Gunnlaugsson, T. & Bloch, D. | 2009 | Distribution and abundance of fin whales (Balaenoptera physalus) in the Northeast and Central Atlantic as inferred from the North Atlantic Sightings Surveys 1987-2001 [BibTeX] |
NAMMCO Scientific Publications 7:49--72 | ||
BibTeX:
@article{Vikingsson2009,
author = {Víkingsson, G.A. and Pike, D.G. and Desportes, G. and Øien, N. and Gunnlaugsson, Th. and Bloch, D.},
title = {{Distribution and abundance of fin whales (\textit{Balaenoptera physalus}) in the Northeast and Central Atlantic as inferred from the North Atlantic Sightings Surveys 1987-2001}},
journal = {NAMMCO Scientific Publications},
year = {2009},
volume = {7},
pages = {49--72}
}
|
|||||
| Waagepetersen, R. & Schweder, T. | 0000 | Likelihood-based inference for clustered line transect data [BibTeX] |
: | ||
BibTeX:
@unpublished{Waagepetersen,
author = {Rasmus Waagepetersen and Tore Schweder},
title = {Likelihood-based inference for clustered line transect data},
year = {0000}
}
|
|||||
| Wade, P. R. & DeMaster, D. P. | 1999 | Determining the optimum interval for abundance surveys [BibTeX] |
Marine Mammal Survey and Assessment Methods :53--66 | ||
BibTeX:
@incollection{WadDem99,
author = {Wade, P. R. and DeMaster, D. P.},
title = {Determining the optimum interval for abundance surveys},
booktitle = {Marine Mammal Survey and Assessment Methods},
publisher = {Balkema},
year = {1999},
pages = {53--66}
}
|
|||||
| Wade, P. R. & Gerrodette, T. | 1993 | Estimates of cetacean abundance and distribution in the eastern tropical Pacific [BibTeX] |
Report of the International Whaling Commission 43:477--493 | ||
BibTeX:
@article{WadGer93,
author = {Wade, P. R. and Gerrodette, T.},
title = {Estimates of cetacean abundance and distribution in the eastern tropical {P}acific},
journal = {Report of the International Whaling Commission},
year = {1993},
volume = {43},
pages = {477--493}
}
|
|||||
| Wallace, R. B., Painter, R. L. E. & Taber, A. B. | 1998 | Primate diversity, habitat preferences, and population density estimates in Noel Kempff Mercado National Park Santa Cruz Department, Bolivia [BibTeX] |
American Journal of Primatology 46:197--211 | ||
BibTeX:
@article{Waletal98,
author = {Wallace, R. B. and Painter, R. L. E. and Taber, A. B.},
title = {Primate diversity, habitat preferences, and population density estimates in {N}oel {K}empff {M}ercado {N}ational {P}ark {S}anta {C}ruz {D}epartment, {B}olivia},
journal = {American Journal of Primatology},
year = {1998},
volume = {46},
pages = {197--211}
}
|
|||||
| Walsh, P. D. & White, L. J. T. | 1999 | What it will take to monitor forest elephant populations [BibTeX] |
Conservation Biology 13:1194--1202 | ||
BibTeX:
@article{WhaWhi99,
author = {Walsh, P. D. and White, L. J. T.},
title = {What it will take to monitor forest elephant populations},
journal = {Conservation Biology},
year = {1999},
volume = {13},
pages = {1194--1202}
}
|
|||||
| Walter, M. J. & Hone, J. | 2003 | A comparison of 3 aerial survey techniques to estimate wild horse abundance in the Australian Alps | Wildlife Society Bulletin 31:1138--1149 | URL | |
| Abstract: Estimates of the size or density of wildlife populations are essential for effective management. Aerial surveys often are the only practical way of obtaining these estimates for large mammals ranging over a large area. Different aerial survey techniques are available. This paper reports on a study that estimated abundance and population density of wild horses (Equus caballus) in the Australian Alps using helicopter aerial surveys. Three frequently used techniques were compared simultaneously: strip counts, mark-recapture, and line transect. Using data on horse groups over a strip width of 200 m, estimates of horse abundance from mark-recapture analyses were higher (N=3,045 modified Petersen and N=3,298 Huggins estimators, respectively) than from strip counts (N=1,814 and N=2,242 for observers 1 and 2, respectively). Use of line-transect analysis yielded the highest estimates of abundance (N=5,200-5,830, population density D=1.86-2.09 $rm km^-2$). The coefficient of variation (CV) of estimates varied from 22% for strip counts (0-50 m) to 28% for mark-recapture analysis (0-50 m) and 31-32% for line-transect analysis (0-200 m). Mark-recapture estimates of horse abundance from the modified Petersen estimator were substantially lower when the strip width was 200 m (N=2,061) compared with a strip width of 50 m (N=4,345). These results suggested that in aerial surveys using strip or mark-recapture analyses, the effect of wide strip width should be examined; otherwise estimates may be strongly negatively biased. Observer 1 estimated mean group size of 4.91+-0.61 SE horses and observer 2 estimated mean group size as 3.79+-0.57 SE horses. Mean group size observed from the ground was 5.65+-0.51 SE. We recommend that aerial surveys be implemented periodically using line-transect methodology to monitor trends in wild horse abundance in the Australian Alps. | |||||
BibTeX:
@article{Walter2003,
author = {Walter, Michelle J. and Hone, Jim},
title = {A comparison of 3 aerial survey techniques to estimate wild horse abundance in the Australian Alps},
journal = {Wildlife Society Bulletin},
year = {2003},
volume = {31},
pages = {1138--1149},
url = {http://links.jstor.org/sici?sici=0091-7648%28200324%2931%3A4%3C1138%3AACO3AS%3E2.0.CO%3B2-B}
}
|
|||||
| Waltert, M., Heber, S., Riedelbauch, S., Lien, J. & Mühlenberg, M. | 2006 | Estimates of blue duiker densities from diurnal and nocturnal line transects in the Korup region, SW Cameroon [BibTeX] |
African Journal of Ecology 44:290-292 | ||
BibTeX:
@article{Waltert2006,
author = {Waltert, M. and Heber, S. and Riedelbauch, S. and Lien, J.L. and M\"{u}hlenberg, M.},
title = {Estimates of blue duiker densities from diurnal and nocturnal line transects in the {Korup region, SW Cameroon}},
journal = {African Journal of Ecology},
year = {2006},
volume = {44},
pages = {290-292}
}
|
|||||
| Waltert, M., Meyer, B., Shanyangi, M. W., Balozi, J. J., Kitwara, O., Qolli, S., Krischke, H. & Muhlenberg, M. | 2008 | Foot surveys of large mammals in woodlands of western Tanzania [BibTeX] |
Journal of Wildlife Management 72:603-610 | ||
BibTeX:
@article{Waltert2008,
author = {Waltert, M. and Meyer, B. and Shanyangi, M. W. and Balozi, J. J. and Kitwara, O. and Qolli, S. and Krischke, H. and Muhlenberg, M.},
title = {Foot surveys of large mammals in woodlands of western Tanzania},
journal = {Journal of Wildlife Management},
year = {2008},
volume = {72},
pages = {603-610}
}
|
|||||
| Ward, A. I., White, P. C. L. & Critchley, C. H. | 2004 | Roe deer Capreolus capreolus behaviour affects density estimates from distance sampling surveys [BibTeX] |
Mammal Review 34:315--319 | ||
BibTeX:
@article{War2004,
author = {Ward, A. I. and White, P. C. L. and Critchley, C. H.},
title = {Roe deer \textit{{C}apreolus capreolus} behaviour affects density estimates from distance sampling surveys},
journal = {Mammal Review},
year = {2004},
volume = {34},
pages = {315--319}
}
|
|||||
| Ward, A. J. & Hiby, A. R. | 1987 | Analysis of cue-counting and blow rate estimation experiments carried out during the 1985/86 IDCR minke whale assessment cruise [BibTeX] |
Report of the International Whaling Commission 37:259--262 | ||
BibTeX:
@article{WarHib87,
author = {Ward, A. J. and Hiby, A. R.},
title = {Analysis of cue-counting and blow rate estimation experiments carried out during the 1985/86 {IDCR} minke whale assessment cruise},
journal = {Report of the International Whaling Commission},
year = {1987},
volume = {37},
pages = {259--262}
}
|
|||||
| Wardell-Johnson, G. & Williams, M. | 2000 | Edges and gaps in mature karri forest, south-western Australia: logging effects on bird species abundance and diversity [BibTeX] |
Forest Ecology and Management 131:1--21 | ||
BibTeX:
@article{WarWil00,
author = {Wardell-Johnson, G. and Williams, M.},
title = {Edges and gaps in mature karri forest, south-western Australia: logging effects on bird species abundance and diversity},
journal = {Forest Ecology and Management},
year = {2000},
volume = {131},
pages = {1--21}
}
|
|||||
| Warren, P. & Baines, D. | 2011 | Evaluation of the distance sampling technique to survey red grouse Lagopus lagopus scoticus on moors in northern England [BibTeX] |
Wildlife Biology 17:135--142 | ||
BibTeX:
@article{Warren2011,
author = {Philip Warren and David Baines},
title = {Evaluation of the distance sampling technique to survey red grouse Lagopus lagopus scoticus on moors in northern England},
journal = {Wildlife Biology},
year = {2011},
volume = {17},
pages = {135--142}
}
|
|||||
| Warren, W. G. & Batcheler, C. L. | 1979 | The density of spatial patterns: robust estimation through distance methods [BibTeX] |
Spatial and Temporal Analysis in Ecology :240--270 | ||
BibTeX:
@incollection{WarBat79,
author = {Warren, W. G. and Batcheler, C. L.},
title = {The density of spatial patterns: robust estimation through distance methods},
booktitle = {Spatial and Temporal Analysis in Ecology},
publisher = {International Co-operative Publishing House},
year = {1979},
pages = {240--270}
}
|
|||||
| Watson, R. A. & Quinn, II, T. J. | 1997 | Performance of transect and point count underwater visual census methods [BibTeX] |
Ecological Modelling 104:103--112 | ||
BibTeX:
@article{Watson1997,
author = {Watson, R. A. and Quinn, II, T. J.},
title = {Performance of transect and point count underwater visual census methods},
journal = {Ecological Modelling},
year = {1997},
volume = {104},
number = {1},
pages = {103--112}
}
|
|||||
| Watson, R., Carlos, G. & Samoilys, M. | 1995 | Bias introduced by the non-random movement of fish in visual transect surveys [BibTeX] |
Ecological Modelling 77:205--214 | ||
BibTeX:
@article{Watson1995,
author = {Watson, R.A. and Carlos, G.M. and Samoilys, M.A.},
title = {Bias introduced by the non-random movement of fish in visual transect surveys},
journal = {Ecological Modelling},
year = {1995},
volume = {77},
number = {2-3},
pages = {205--214}
}
|
|||||
| WDCS/Greenpeace | 2005 | Cetaceans and pelagic trawl fisheries in the Western Approaches of the English Channel [BibTeX] |
: | ||
BibTeX:
@techreport{WDCS/Greenpeace2005,
author = {WDCS/Greenpeace},
title = {Cetaceans and pelagic trawl fisheries in the Western Approaches of the English Channel},
year = {2005}
}
|
|||||
| Wegge, P. & Storaas, T. | 2009 | Sampling tiger ungulate prey by the distance method: lessons learned in Bardia National Park, Nepal | Animal Conservation 12:78--84 | ||
| Abstract: Because tiger Panthera tigris numbers are regulated by their prey base, prey abundance needs to monitored and estimated reliably. Recently, distance sampling has been adopted as the most appropriate method and is now becoming the standard monitoring protocol in all tiger range countries in south Asia. However, the accuracy of the density estimates generated by this method has not been assessed. From total counts within habitat blocks, we obtained accurate density estimates of ungulates within three main habitats in Bardia National Park, Nepal. We then applied the distance sampling method in the same habitats and compared the results. Distance sampling on foot in dense habitats (riverine forest and tallgrass floodplain) violated method assumptions, and sampling from vehicle along roads gave biased estimates. Sampling from elephant back worked well in all habitat types, but owing to their behaviour, the density of barking deer Muntiacus muntjak was underestimated. The accuracy of the estimates varied with sampling effort; for the very abundant chital deer Axis axis, estimates varied markedly at <200 animal observations, but converged at larger sample sizes to a similar point estimate as intensive block counts when approaching 300 observations. For the less abundant species, with <20 observations along >100 km of transect lines, the confidence intervals were quite high, and, hence, of limited value for detecting short-term populations trends. It is therefore difficult to obtain accurate density estimates of rare species by the distance method. In areas consisting of dense habitats, we recommend that the food base of tiger be estimated by distance sampling from elephant back, not on foot, directed at the main and most abundant prey species. For rare species, encounter rates obtained simultaneously may then serve as indices of relative abundances. | |||||
BibTeX:
@article{WeggeFebruary2009,
author = {Wegge, P. and Storaas, T.},
title = {Sampling tiger ungulate prey by the distance method: lessons learned in Bardia National Park, Nepal},
journal = {Animal Conservation},
year = {2009},
volume = {12},
pages = {78--84}
}
|
|||||
| Wellendorf, S. & Palmer, W. | 2005 | Investigating the use of covey call point counts to estimate autumn density of northern bobwhites [BibTeX] |
Wildlife Biology in Practice 2:140-145 | ||
BibTeX:
@article{Wellendorf2005,
author = {S.D. Wellendorf and W.E. Palmer},
title = {Investigating the use of covey call point counts to estimate autumn density of northern bobwhites},
journal = {Wildlife Biology in Practice},
year = {2005},
volume = {2},
pages = {140-145}
}
|
|||||
| Welsh, A. H. | 2002 | Incomplete detection in enumeration surveys: whither distance sampling [BibTeX] |
Australian & New Zealand Journal of Statistics 44:13--22 | ||
BibTeX:
@article{Wel2002,
author = {Welsh, A. H.},
title = {Incomplete detection in enumeration surveys: whither distance sampling},
journal = {Australian \& New Zealand Journal of Statistics},
year = {2002},
volume = {44},
pages = {13--22}
}
|
|||||
| Welsh, C. J. E. & Capen, D. E. | 1992 | Availability of nesting sites as a limit to woodpecker populations [BibTeX] |
Forest Ecology and Management 48:31--41 | ||
BibTeX:
@article{WelCap92,
author = {Welsh, C. J. E. and Capen, D. E.},
title = {Availability of nesting sites as a limit to woodpecker populations},
journal = {Forest Ecology and Management},
year = {1992},
volume = {48},
pages = {31--41}
}
|
|||||
| Westbrooke, I., Etheridge, N. & Powlesland, R. | 2003 | Comparing methods for assessing mortality impacts of an aerial 1080 pest control operation on tomtits (Petroica macrocephala toitoi) in Tongariro Forest | New Zealand Journal of Ecology 27:115--123 | ||
| Abstract: This study aimed to estimate the level of mortality of North Island tomtits (Petroica macrocephala toitoi) during an aerial 1080 possum poisoning operation in Tongariro Forest, New Zealand, and to evaluate transect-based alternatives to banding for monitoring tomtit populations. The operation used 12 g toxic (1080 at 0.15% weight/weight) cereal baits sown at 3 kg/ha. Transects were established at three neighbouring sites; two within the 1080 poison area, and one outside. The re-sighting of l4 out of 15 banded male tomtits at one site within the 1080 operation indicated that mortality was low. This was backed up by results from a before-after-control-impact (BACI) design to analyse density estimates from distance sampling along transects. We analysed the change in counts of territorial males before and after the operation based on the same transect surveys. This also showed little impact of poisoning on tomtits, and indicated that loss rates greater than 8.4% due to 1080 were incompatible with the data (95% one-sided confidence bound). Counts of territorial males gave a much tighter confidence bound than the banding or distance sampling results. Of the techniques applied, the counting of territorial males appears to have the most promise for providing high-precision estimates of short-term impacts, by taking full advantage of the territorial habits of male tomtits in spring. However, distance sampling shows potential for providing the basis for longer-term monitoring of tomtit populations. The transect-based approaches involved substantially fewer resources than banding for estimating short-term impacts, and offer a considerably less-intensive means of longer-term monitoring of tomtits. | |||||
BibTeX:
@article{Westbrooke2003,
author = {Westbrooke, I.M. and Etheridge, N.D. and Powlesland, R.G.},
title = {Comparing methods for assessing mortality impacts of an aerial 1080 pest control operation on tomtits \textit{(Petroica macrocephala toitoi)} in Tongariro Forest},
journal = {New Zealand Journal of Ecology},
year = {2003},
volume = {27},
number = {2},
pages = {115--123}
}
|
|||||
| Wetmore, S. P., Keller, R. A. & Smith, G. E. P. | 1985 | Effects of logging on bird populations in British Columbia as determined by a modified point-count method [BibTeX] |
Canadian Field Naturalist 99:224--233 | ||
BibTeX:
@article{Wetetal85,
author = {Wetmore, S. P. and Keller, R. A. and Smith, G. E. P.},
title = {Effects of logging on bird populations in {B}ritish {C}olumbia as determined by a modified point-count method},
journal = {Canadian Field Naturalist},
year = {1985},
volume = {99},
pages = {224--233}
}
|
|||||
| White, D. H., Kepler, C. B., Hatfield, J. S., Sykes, P. W. & Seginak, J. T. | 1996 | Habitat associations of birds in the Georgia Piedmont during winter [BibTeX] |
Journal of Field Ornithology 67:159--166 | ||
BibTeX:
@article{Whietal96,
author = {White, D. H. and Kepler, C. B. and Hatfield, J. S. and Sykes, P. W. and Seginak, J. T.},
title = {Habitat associations of birds in the {G}eorgia {P}iedmont during winter},
journal = {Journal of Field Ornithology},
year = {1996},
volume = {67},
pages = {159--166}
}
|
|||||
| White, G. | 2005 | Correcting wildlife counts using detection probabilities | Wildlife Research 32:211--216 | ||
| Abstract: One of the most pervasive uses of indices of wildlife populations is unconnected counts of animals. Two examples are the minimum number known alive from capture and release studies, and aerial surveys where the detection probability is not estimated from a sightability model, marked animals, or distance sampling. Both the mark-recapture and distance-sampling estimators are techniques to estimate the probability of detection of an individual animal (or cluster of animals), which is then used to correct a count of animals. However, often the number of animals in a survey is inadequate to compute an estimate of the detection probability and hence correct the count. Modern methods allow sophisticated modelling to estimate the detection probability, including incorporating covariates to provide additional information about the detection probability. Examples from both distance and mark-recapture sampling are presented to demonstrate the approach. © CSIRO 2005. | |||||
BibTeX:
@article{White2005,
author = {White, G.C.},
title = {Correcting wildlife counts using detection probabilities},
journal = {Wildlife Research},
year = {2005},
volume = {32},
number = {3},
pages = {211--216}
}
|
|||||
| White, G. & Burnham, K. P. | 1999 | Program MARK: Survival estimation from populations of marked animals [BibTeX] |
Bird Study 46:Supplement, 120-138 | ||
BibTeX:
@article{White1999,
author = {White, G.C. and K. P. Burnham},
title = {Program {MARK}: Survival estimation from populations of marked animals},
journal = {Bird Study},
year = {1999},
volume = {46},
pages = {Supplement, 120-138}
}
|
|||||
| White, G. C., Bartmann, R. M., Carpenter, L. H. & Garrott, R. A. | 1989 | Evaluation of aerial line transects for estimating mule deer densities [BibTeX] |
Journal of Wildlife Management 53:625--635 | ||
BibTeX:
@article{Whietal89,
author = {White, G. C. and Bartmann, R. M. and Carpenter, L. H. and Garrott, R. A.},
title = {Evaluation of aerial line transects for estimating mule deer densities},
journal = {Journal of Wildlife Management},
year = {1989},
volume = {53},
pages = {625--635}
}
|
|||||
| White, L. J. T. | 1994 | Biomass of rain forest mammals in the Lopé Reserve, Gabon [BibTeX] |
Journal of Animal Ecology 63:499--512 | ||
BibTeX:
@article{Whi94,
author = {White, L. J. T.},
title = {Biomass of rain forest mammals in the {L}op\'e {R}eserve, {G}abon},
journal = {Journal of Animal Ecology},
year = {1994},
volume = {63},
pages = {499--512}
}
|
|||||
| White, M. L. J., Gilbert, F. & S., Z. | 2007 | Bird surveys and distance sampling in St Katherine Protectorate, South Sinai, Egypt in 2007 [BibTeX] |
Egyptian Journal of Biology 9:60--68 | ||
| Review: Não tem uma verdadeira compreensão dos métodos. | |||||
BibTeX:
@article{White2007,
author = {White, M. L. J. and Gilbert, F. and Zalat S.},
title = {Bird surveys and distance sampling in St Katherine Protectorate, South Sinai, Egypt in 2007},
journal = {Egyptian Journal of Biology},
year = {2007},
volume = {9},
pages = {60--68}
}
|
|||||
| Whitehead, H. | 2009 | Estimating abundance from one-dimensional passive acoustic surveys [BibTeX] |
Journal Of Wildlife Management 73:1000--1009 | ||
BibTeX:
@article{Whitehead2009,
author = {Hal Whitehead},
title = {Estimating abundance from one-dimensional passive acoustic surveys},
journal = {Journal Of Wildlife Management},
year = {2009},
volume = {73},
pages = {1000--1009}
}
|
|||||
| Whitesides, G. H., Oates, J. F., Green, S. M. & Kluberdanz, R. P. | 1988 | Estimating primate densities from transects in a west African rain forest: a comparison of techniques [BibTeX] |
Journal of Animal Ecology 57:345--367 | ||
BibTeX:
@article{Whietal88,
author = {Whitesides, G. H. and Oates, J. F. and Green, S. M. and Kluberdanz, R. P.},
title = {Estimating primate densities from transects in a west {A}frican rain forest: a comparison of techniques},
journal = {Journal of Animal Ecology},
year = {1988},
volume = {57},
pages = {345--367}
}
|
|||||
| Whittaker, D. G., Dyke, W. A. V. & Love, S. L. | 2003 | Evaluation of Aerial Line Transect for Estimating Pronghorn Antelope Abundance in Low-Density Populations | Wildlife Society Bulletin 31:443--453 | URL | |
| Abstract: Recent trend surveys have indicated that pronghorn antelope (Antilocapra americana) populations have declined in Oregon. However, fluctuations of up to 50% from year to year suggest that trend data may not accurately reflect true population changes, and data reliability may be questioned if proposals for mitigating population declines become contentious. We evaluated aerial line transect (LT) for estimating pronghorn antelope abundance in Oregon. We conducted surveys in 2 Oregon Big Game Management Units (BGU) during May 1998 and 1 BGU during May 1999 and 2000. We found LT sampling provided reasonable estimates of population size in our survey areas where densities were lower than in other states already utilizing the technique. However, 95% confidence intervals for estimates were large. In addition, application to low-density populations was more expensive compared to traditional survey methods because additional effort was required to obtain desired sample size and resulting precision. Relative comparisons with historic trend counts and management implications are discussed. | |||||
BibTeX:
@article{Whit2003,
author = {Whittaker, Donald G. and Dyke, Walter A. Van and Love, Stuart L.},
title = {Evaluation of Aerial Line Transect for Estimating Pronghorn Antelope Abundance in Low-Density Populations},
journal = {Wildlife Society Bulletin},
year = {2003},
volume = {31},
number = {2},
pages = {443--453},
url = {http://links.jstor.org/sici?sici=0091-7648%28200322%2931%3A2%3C443%3AEOALTF%3E2.0.CO%3B2-K}
}
|
|||||
| Wich, S. & Boyko, R. | 2011 | Which factors determine orangutan nests’ detection probability along transects? [BibTeX] |
Tropical Conservation Science 4:53--63 | ||
BibTeX:
@article{Wich2011,
author = {Wich, S.A. and Boyko, R.H.},
title = {Which factors determine orangutan nests’ detection probability along transects?},
journal = {Tropical Conservation Science},
year = {2011},
volume = {4},
pages = {53--63}
}
|
|||||
| Wickersham, L. E. & Wickersham, J. L. | 2006 | Density and habitat use of gray vireos (Vireo vicinior) in Northwestern New Mexico: 2006 final report [BibTeX] |
: | ||
BibTeX:
@techreport{Wickersham2006,
author = {Lynn E. Wickersham and John L. Wickersham},
title = {Density and habitat use of gray vireos (\textit{Vireo vicinior}) in Northwestern New Mexico: 2006 final report},
year = {2006}
}
|
|||||
| Wiens, J. A. & Nussbaum, R. A. | 1975 | Model estimation of energy flow in northwestern coniferous forest bird communities [BibTeX] |
Ecology 56:547--561 | ||
BibTeX:
@article{WieNus75,
author = {Wiens, J. A. and Nussbaum, R. A.},
title = {Model estimation of energy flow in northwestern coniferous forest bird communities},
journal = {Ecology},
year = {1975},
volume = {56},
pages = {547--561}
}
|
|||||
| Wiens, J., Noon, B. & Reynolds, R. | 2006 | Post-fledging survival of Northern Goshawks: The importance of prey abundance, weather, and dispersal | Ecological Applications 16:406--418 | ||
| Abstract: Effective wildlife conservation strategies require an understanding of how fluctuating environmental conditions affect sensitive life stages. As part of a long-term study, we examined post-fledging and post-independence survival of 89 radio-marked juvenile Northern Goshawks (Accipiter gentilis) produced from 48 nests in northern Arizona, USA, during 1998-2001. Information-theoretic methods were used to examine within- and among-year variation in survival relative to environmental (prey abundance, weather), territory (hatching date, brood size), and individual (gender, body mass) sources of variation. The results support age- and cohort-specific differences in survival that were best explained by behaviors occurring at distinct stages of juvenile development, annual changes in the density of primary bird and mammal prey species, and gender-related differences in body mass. Survival between fledging and independence increased linearly with age and varied among annual cohorts of radio-marked juveniles from 0.81 (95% CI 5 0.60-0.93) to 1.00 (95% CI 5 0.95-1.00) in association with annual differences in prey density; the slope coefficient for the additive effect of prey density on survival was 1.12 (95% CI 5 0.06-2.19). Survival declined to 0.71 (95% CI 5 0.60-0.93) shortly after juveniles initiated dispersal (weeks 8-12 post-fledging) and moved to more open habitats at lower elevations. Survival was not closely associated with weather or territory-level parameters. A comparison of the predictions of environmental-, territory-, and individual-based models of survival demonstrated that food availability was the primary factor limiting juvenile survival. This finding indicates that forest management prescriptions designed to support abundant prey populations while providing forest structural conditions that allow goshawks to access their prey within breeding areas should benefit juvenile survival. © 2006 by the Ecological Society of America. | |||||
BibTeX:
@article{Wiens2006,
author = {Wiens, J.D. and Noon, B.R. and Reynolds, R.T.},
title = {Post-fledging survival of Northern Goshawks: The importance of prey abundance, weather, and dispersal},
journal = {Ecological Applications},
year = {2006},
volume = {16},
number = {1},
pages = {406--418}
}
|
|||||
| Wigley, R. L., Theroux, R. B. & Murray, H. E. | 1975 | Deep-sea red crab, Gervon quinquedens, survey off northeastern United States [BibTeX] |
Marine Fisheries Review 37:1--21 | ||
BibTeX:
@article{Wigetal75,
author = {Wigley, R. L. and Theroux, R. B. and Murray, H. E.},
title = {Deep-sea red crab, \emph{{G}ervon quinquedens}, survey off northeastern {U}nited {S}tates},
journal = {Marine Fisheries Review},
year = {1975},
volume = {37},
pages = {1--21}
}
|
|||||
| Wiig, . & Derocher, A. E. | 1999 | Application of aerial survey methods to polar bears in the Barents Sea [BibTeX] |
Marine Mammal Survey and Assessment Methods :27--36 | ||
BibTeX:
@incollection{WiiDer99,
author = {Wiig, \O. and Derocher, A. E.},
title = {Application of aerial survey methods to polar bears in the {B}arents {S}ea},
booktitle = {Marine Mammal Survey and Assessment Methods},
publisher = {Balkema},
year = {1999},
pages = {27--36}
}
|
|||||
| Wildman, V. J. & Ramsey, F. L. | 1985 | Estimating effective area surveyed with the cumulative distribution function [BibTeX] |
: | ||
BibTeX:
@techreport{WilRam85,
author = {Wildman, V. J. and Ramsey, F. L.},
title = {Estimating effective area surveyed with the cumulative distribution function},
year = {1985}
}
|
|||||
| Wilkinson, N., Langston, R., Gregory, R., Gibbons, D. & Marquiss, M. | 2002 | Capercaillie Tetrao urogallus abundance and habitat use in Scotland, in winter 1998-99 | Bird Study 49:177--185 | ||
| Abstract: Capsule: A second full survey in which we estimate the population at 1073 birds (95% CL 549-2041). Aims: To provide an up-to-date estimate of the population size of Capercaillie in Britain and to identify habitat use by Capercaillie in winter. Methods: Using the census technique of distance sampling, flushed birds were counted along line transects walked in stratified random blocks of forest within the species' range. The same transects were surveyed as used in the 1992-94 survey, enabling direct comparison of the results. Densities were estimated using the DISTANCE program, combining these data with those from a similar survey of Capercaillie in 1992-94 to allow a more robust estimate of the detection function. Results: The Capercaillie population was estimated to be 1073 birds (95% CL 549-2041). This represents a decline of 51% between the two surveys, at a rate of 13% per annum. Females declined at a faster rate than males resulting in a marked change in the sex-ratio, which was close to 1:1 for the entire population. Bird densities declined by a similar magnitude in both native pinewoods and other woodlands in comparison to 1992-94. Even so, densities were significantly higher in native pinewoods (1.63 km-2) than in other woodlands (0.43 km-2), which comprised largely planted Scots Pine Pinus sylvestris, larch Larix spp., Lodgepole Pine Pinus contorta and Sitka Spruce Picea sitchensis. Overall, Capercaillie tended to use forest stands with a high proportion of Scots Pine and Blaeberry Vaccinium myrtilus; features that are typical of native pinewoods and old pine plantations. Conclusions: The Capercaillie population has undergone a dramatic decline during the last five years. The decline has been greater for females and has occurred across habitats. This information is helping to focus efforts in securing the future for Capercaillie in Scotland, which has now become a major conservation challenge. | |||||
BibTeX:
@article{Wilkinson2002,
author = {Wilkinson, N.I. and Langston, R.H.W. and Gregory, R.D. and Gibbons, D.W. and Marquiss, M.},
title = {Capercaillie \textit{Tetrao urogallus} abundance and habitat use in Scotland, in winter 1998-99},
journal = {Bird Study},
year = {2002},
volume = {49},
number = {2},
pages = {177--185}
}
|
|||||
| Williams, C. K., Applegate, R. D., Lutz, R. S. & Rusch, D. H. | 2000 | A comparison of raptor densities and habitat use in Kansas cropland and rangeland ecosystems [BibTeX] |
Journal of Raptor Research 34:203--209 | ||
BibTeX:
@article{Wiletal00,
author = {Williams, C. K. and Applegate, R. D. and Lutz, R. S. and Rusch, D. H.},
title = {A comparison of raptor densities and habitat use in {K}ansas cropland and rangeland ecosystems},
journal = {Journal of Raptor Research},
year = {2000},
volume = {34},
pages = {203--209}
}
|
|||||
| Williams, R., Hedley, S. & Hammond, P. | 2006 | Modeling distribution and abundance of Antarctic baleen whales using ships of opportunity | Ecology and Society 11:-- | ||
| Abstract: Information on animal abundance and distribution is at the cornerstone of many wildlife and conservation strategies. However, these data can be difficult and costly to obtain for cetacean species. The expense of sufficient ship time to conduct design-unbiased line transect surveys may be simply out of reach for researchers in many countries, which nonetheless grapple with problems of conservation of endangered species, by-catch of small cetaceans in commercial fisheries, and progression toward ecosystem-based fisheries management. Recently developed spatial modeling techniques show promise for estimating wildlife abundance using non-randomized surveys, but have yet to receive much field-testing in areas where designed surveys have also been conducted. Effort and sightings data were collected along 9 650 km of transects aboard ships of opportunity in the Southern Ocean during the austral summers of 2000-2001 and 2001-2002. Generalized additive models with generalized cross-validation were used to express heterogeneity of cetacean sightings as functions of spatial covariates. Models were used to map predicted densities and to estimate abundance of humpback, minke, and fin whales in the Drake Passage and along the Antarctic Peninsula. All species' distribution maps showed strong density gradients, which were robust to jackknife resampling when each of 14 trips was removed sequentially with replacement. Looped animations of model predictions of whale density illustrate uncertainty in distribution estimates in a way that is informative to non-scientists. The best abundance estimate for humpback whales was 1 829 (95% CI: 978-3 422). Abundance of fin whales was 4 487 (95% CI: 1 326-15 179) and minke whales was 1,544 (95% CI: 1,221-1,953). These estimates agreed roughly with those reported from a designed survey conducted in the region during the previous austral summer. These estimates assumed that all animals on the trackline were detected, but preliminary results suggest that any negative bias due to violation of this assumption was likely small. Similarly, current methodological limitations prohibit inclusion of all known sources of uncertainty in the favored variance estimator. Meanwhile, our approach can be seen generally as an inexpensive pilot study to identify areas of predicted high density that could be targeted to: inform stratified designs for future line transect surveys, making them less expensive and more precise; increase efficiency of future photo-identification or biopsy studies; identify candidate time-area fisheries closures to minimize by-catch; or direct ecotourism activities. The techniques are likely to apply to areas where funding is limiting, where cetacean studies or wilderness-based tourism are just beginning, or in regions where even a very rough estimate of animal abundance is needed for conservation or management purposes. Copyright © 2006 by the author(s). | |||||
BibTeX:
@article{Williams2006,
author = {Williams, R. and Hedley, S.L. and Hammond, P.S.},
title = {Modeling distribution and abundance of Antarctic baleen whales using ships of opportunity},
journal = {Ecology and Society},
year = {2006},
volume = {11},
number = {1},
pages = {--}
}
|
|||||
| Williams, R., Hedley, S. L., Branch, T. A., Bravington, M. V., Zerbini, A. N. & Findlay, K. P. | 2011 | Chilean blue whales as a case study to illustrate methods to estimate abundance and evaluate conservation status of rare species [BibTeX] |
Conservation Biology 25:526-535 | DOI | |
BibTeX:
@article{Williams2011,
author = {Williams, Rob And Hedley, Sharon L. And Branch, Trevor A. And Bravington, Mark V. And Zerbini, Alexandre N. And Findlay, Ken P.},
title = {Chilean blue whales as a case study to illustrate methods to estimate abundance and evaluate conservation status of rare species},
journal = {Conservation Biology},
year = {2011},
volume = {25},
pages = {526-535},
doi = {10.1111/j.1523-1739.2011.01656.x}
}
|
|||||
| Williams, R., Leaper, R., Zerbini, A. N. & Hammond, P. S. | 2007 | Methods for investigating measurement error in cetacean line-transect surveys [BibTeX] |
Journal of the Marine Biological Association of the United Kingdom 87:313-320 | DOI PDF | |
BibTeX:
@article{Williams2007,
author = {Rob Williams and Russell Leaper and Alexandre N. Zerbini and Philip S. Hammond},
title = {Methods for investigating measurement error in cetacean line-transect surveys},
journal = {Journal of the Marine Biological Association of the United Kingdom},
year = {2007},
volume = {87},
pages = {313-320},
doi = {10.1017/S0025315407055154}
}
|
|||||
| Williams, R. & Thomas, L. | 2007 | Distribution and abundance of marine mammals in the coastal waters of British Columbia, Canada [BibTeX] |
Journal of Cetacean Research and Management 9:15--28 | ||
BibTeX:
@article{Williamssubmitted,
author = {Williams, R. and L. Thomas},
title = {Distribution and abundance of marine mammals in the coastal waters of British Columbia, Canada},
journal = {Journal of Cetacean Research and Management},
year = {2007},
volume = {9},
pages = {15--28}
}
|
|||||
| Wilson, D. M. & Bart, J. | 1985 | Reliability of singing bird surveys: effects of song phenology during the breeding season [BibTeX] |
The Condor 87:69-73 | ||
BibTeX:
@article{Wilson1985,
author = {Wilson, D. M. and Bart, J.},
title = {Reliability of singing bird surveys: effects of song phenology during the breeding season},
journal = {The Condor},
year = {1985},
volume = {87},
pages = {69-73}
}
|
|||||
| Wilson, K. R. & Anderson, D. R. | 1985 | Evaluation of two density estimators of small mammal population size [BibTeX] |
Journal of Mammalogy 66:13--21 | ||
BibTeX:
@article{WilAnd85a,
author = {Wilson, K. R. and Anderson, D. R.},
title = {Evaluation of two density estimators of small mammal population size},
journal = {Journal of Mammalogy},
year = {1985},
volume = {66},
pages = {13--21}
}
|
|||||
| Wilson, K. R. & Anderson, D. R. | 1985 | Evaluation of a density estimator based on a trapping web and distance sampling theory. | Ecology 66:1185--1194 | ||
| Abstract: A new density estimation technique using a trapping web and distance sampling theory was evaluated using Monte Carlo methods.-from Authorscapture recapture density estimation distance sampling Monte Carlo plotless sampling removal simulation small mammals trapping web design.Utah Coop. Wildl. Research Unit, Utah State Univ., Logan, UT 84322, USA. | |||||
BibTeX:
@article{Wilson1985b,
author = {Wilson, K. R. and Anderson, D. R.},
title = {Evaluation of a density estimator based on a trapping web and distance sampling theory.},
journal = {Ecology},
year = {1985},
volume = {66},
number = {4},
pages = {1185--1194}
}
|
|||||
| Winarni, N. L. & Jones, M. | 2007 | Community patterns of birds and butterflies in Lambusango forest, Buton, Southeast Sulawesi in 2006 [BibTeX] |
: | ||
BibTeX:
@techreport{Winarni2007,
author = {Nurul L. Winarni and Martin Jones},
title = {Community patterns of birds and butterflies in Lambusango forest, Buton, Southeast Sulawesi in 2006},
year = {2007}
}
|
|||||
| Witting, L. & Pike, D. | 2009 | Distance estimation experiment for aerial minke whale surveys [BibTeX] |
NAMMCO Sci. Publ. 7:111--116 | ||
BibTeX:
@article{Witting2009,
author = {Witting, L. and Pike, D.G.},
title = {Distance estimation experiment for aerial minke whale surveys},
journal = {NAMMCO Sci. Publ.},
year = {2009},
volume = {7},
pages = {111--116}
}
|
|||||
| Woodroofe, M. & Zhang, R. | 1999 | Isotonic estimation for grouped data | Statistics and Probability Letters 45:41--47 | ||
| Abstract: A non-parametric estimator of a non-increasing density is found in a class of piecewise linear functions when the data consist only of counts. An EM-Algorithm for computing the estimator is developed, and the iterates in the algorithm are shown to converge to the maximum likelihood estimator. Potential applications to distance sampling models are described and illustrated with a numerical example. © 1999 Elsevier Science B.V. | |||||
BibTeX:
@article{Woodroofe1999,
author = {Woodroofe, M. and Zhang, R.},
title = {Isotonic estimation for grouped data},
journal = {Statistics and Probability Letters},
year = {1999},
volume = {45},
number = {1},
pages = {41--47}
}
|
|||||
| Wright, D. & Jones, P. | 2005 | Population densities and habitat associations of the range-restricted Rock Firefinch Lagonosticta sanguinodorsalis on the Jos Plateau, Nigeria | Bird Conservation International 15:287--295 | ||
| Abstract: Population densities, using distance sampling, and habitat associations of the range-restricted Rock Firefinch Lagonosticta sanguinodorsalis were investigated between late May and early July 2002 in a protected site at Amurum on the Jos Plateau, Nigeria, and in unprotected surrounding habitats. Rock Firefinches were strongly associated with inselbergs and rocky outcrops and avoided scrub and abandoned farmland. Density was not significantly higher on the Amurum protected site (0.79 birds/ha; 95% CL 0.51-1.21) than on the unprotected areas (0.55 birds/ha; 95% CL 0.37-0.82). Rock Firefinches were locally common around inselbergs on the Jos Plateau, even where this habitat was unprotected. It remains uncertain to what extent increasing habitat degradation may affect this species' ability to persist as small populations in isolated habitat fragments. Rock Firefinch's host-specific brood parasite, the similarly range-restricted Jos Plateau Indigobird Vidua maryae, was not seen until June during this study, and no density estimate is available. © BirdLife International 2005. | |||||
BibTeX:
@article{Wright2005,
author = {Wright, D. and Jones, P.},
title = {Population densities and habitat associations of the range-restricted Rock Firefinch \textit{Lagonosticta sanguinodorsalis} on the Jos Plateau, Nigeria},
journal = {Bird Conservation International},
year = {2005},
volume = {15},
number = {3},
pages = {287--295}
}
|
|||||
| Wunder, M. B., Knopf, F. L. & Pague, C. A. | 2003 | The high-elevation population of Mountain Plovers in Colorado | The Condor 105:654--662 | ||
| Abstract: We surveyed a discrete population of Mountain Plovers (Charadrius montanus) in South Park, Park County, Colorado, to determine the size and relative contribution of this geographically isolated area to the global population of plovers. First, we mapped potential plover habitat within South Park based on landform and vegetation descriptors. Second, we identified occupied habitat using observations from a systematic inventory of potential habitat from 1995-1999 and from a study of breeding biology from 2000-2002. Third, we estimated breeding densities within a framework designed specifically for distance sampling. We mapped 82750 ha of potential habitat. We recorded 2516 plover locations from which we estimated 29 176 ha of occupied habitat. We estimated densities for 14 960 ha of potential habitat. Average plover density from 2000-2002 was 7.9 ± 0.9 (SE) breeding adults km-2, a high value compared with other sites. We calculated a population of 1187 ± 140 (SE) plovers in the distance sampling area. Assuming density in our sampling area was similar for all documented occupied habitat, we estimated the population of plovers in South Park at 2310 adults. We conclude that South Park represents a contemporarily large concentration of breeding Mountain Plovers. | |||||
BibTeX:
@article{Wunder2003,
author = {Michael B. Wunder and Fritz L. Knopf and Chris A. Pague},
title = {The high-elevation population of Mountain Plovers in Colorado},
journal = {The Condor},
year = {2003},
volume = {105},
number = {4},
pages = {654--662}
}
|
|||||
| Wywialowski, A. P. & Stoddart, L. C. | 1988 | Estimation of jack rabbit density: methodology makes a difference [BibTeX] |
Journal of Wildlife Management 52:57--59 | ||
BibTeX:
@article{WywSto88,
author = {Wywialowski, A. P. and Stoddart, L. C.},
title = {Estimation of jack rabbit density: methodology makes a difference},
journal = {Journal of Wildlife Management},
year = {1988},
volume = {52},
pages = {57--59}
}
|
|||||
| Yapp, W. B. | 1956 | The theory of line transects [BibTeX] |
Bird Study 3:93--104 | ||
BibTeX:
@article{Yap56,
author = {Yapp, W. B.},
title = {The theory of line transects},
journal = {Bird Study},
year = {1956},
volume = {3},
pages = {93--104}
}
|
|||||
| Yazvenko, S. B., McDonald, T. L., Blokhin, S. A., Johnson, S. R., Meier, S. K., Melton, H. R., Newcomer, M. W., Nielson, R. M., Vladimirov, V. L. & Wainwright, P. W. | 2007 | Distribution and abundance of western gray whales during a seismic survey near Sakhalin Island, Russia [BibTeX] |
Environmental Monitoring and Assessment, Volume 134, Numbers 1-3 / November, 2007 134:45--73 | ||
BibTeX:
@article{Yazvenko2007,
author = {S. B. Yazvenko and T. L. McDonald and S. A. Blokhin and S. R. Johnson and S. K. Meier and H. R. Melton and M. W. Newcomer and R. M. Nielson and V. L. Vladimirov and P. W. Wainwright},
title = {Distribution and abundance of western gray whales during a seismic survey near Sakhalin Island, Russia},
journal = {Environmental Monitoring and Assessment, Volume 134, Numbers 1-3 / November, 2007},
year = {2007},
volume = {134},
pages = {45--73}
}
|
|||||
| Yoklavich, M. M., Love, M. S. & Forney, K. A. | 2007 | A fishery-independent assessment of an overfished rockfish stock, cowcod (Sebastes levis), using direct observations from an occupied submersible [BibTeX] |
Canadian Journal of Fisheries and Aquatic Sciences 64:1795--1804 | ||
BibTeX:
@article{Yoklavich2007,
author = {Mary M. Yoklavich and Milton S. Love and Karin A. Forney},
title = {A fishery-independent assessment of an overfished rockfish stock, cowcod (\textit{Sebastes levis}), using direct observations from an occupied submersible},
journal = {Canadian Journal of Fisheries and Aquatic Sciences},
year = {2007},
volume = {64},
pages = {1795--1804}
}
|
|||||
| Yoshida, H., Shirakihara, K., Kishino, H. & Shirakihara, M. | 1997 | A population size estimate of the finless porpoise, Neophocaena phocaenoides, from aerial sighting surveys in Ariake Sound and Tachibana Bay, Japan [BibTeX] |
Researches on Population Ecology 39:239--247 | ||
BibTeX:
@article{Yosetal97,
author = {Yoshida, H. and Shirakihara, K. and Kishino, H. and Shirakihara, M.},
title = {A population size estimate of the finless porpoise, \emph{{N}eophocaena phocaenoides}, from aerial sighting surveys in {A}riake {S}ound and {T}achibana {B}ay, {J}apan},
journal = {Researches on Population Ecology},
year = {1997},
volume = {39},
pages = {239--247}
}
|
|||||
| Yoshida, H., Shirakihara, K., Kishino, H., Shirakihara, M. & Takemura, A. | 1998 | Finless porpoise abundance in Omura Bay, Japan: estimation from aerial sighting surveys [BibTeX] |
Journal of Wildlife Management 62:286--291 | ||
BibTeX:
@article{Yosetal98,
author = {Yoshida, H. and Shirakihara, K. and Kishino, H. and Shirakihara, M. and Takemura, A.},
title = {Finless porpoise abundance in {O}mura {B}ay, {J}apan: estimation from aerial sighting surveys},
journal = {Journal of Wildlife Management},
year = {1998},
volume = {62},
pages = {286--291}
}
|
|||||
| Yost, A. C. & Wright, R. G. | 2001 | Moose, caribou, and grizzly bear distribution in relation to road traffic in Denali National Park, Alaska [BibTeX] |
Arctic 54:41--48 | ||
BibTeX:
@article{Yosetal01,
author = {Yost, A. C. and Wright, R. G.},
title = {Moose, caribou, and grizzly bear distribution in relation to road traffic in {D}enali {N}ational {P}ark, {A}laska},
journal = {Arctic},
year = {2001},
volume = {54},
pages = {41--48}
}
|
|||||
| Young, J. K., Murray, K. M., Strindberg, S., Buuveibaatar, B. & Berger, J. | 2010 | Population estimates of Endangered Mongolian saiga Saiga tatarica mongolica: implications for effective monitoring and population recovery [BibTeX] |
Oryx 44:285-292 | DOI URL | |
BibTeX:
@article{CambridgeJournals:7467984,
author = {Young,Julie K. and Murray,Kim M. and Strindberg,Samantha and Buuveibaatar,Bayarbaatar and Berger,Joel},
title = {Population estimates of Endangered Mongolian saiga Saiga tatarica mongolica: implications for effective monitoring and population recovery},
journal = {Oryx},
year = {2010},
volume = {44},
number = {02},
pages = {285-292},
url = {http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=7467984&fulltextType=RA&fileId=S0030605309990858},
doi = {10.1017/S0030605309990858}
}
|
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| Young, R., Fa, J., Ogrodowczyk, A., Morton, M., Lesmond, S. & Funk, S. | 2006 | The St Lucia whiptail lizard Cnemidophorus vanzoi: A conservation dilemma? | ORYX 40:358--361 | ||
| Abstract: Uncertainties in species definitions can have important consequences for biodiversity conservation because taxonomic rank is used as a criterion to assess the conservation priorities of threatened organisms. The Vulnerable St Lucia whiptail lizard Cnemidophorus vanzoi, considered a single species, is the sole representative of its genus in the Caribbean region, found on Maria Major and Maria Minor islands off the coast of St Lucia. However, a recent study revealed significant morphological and phylogenetic differences between the two populations and recommended they should be managed as two separate entities. We surveyed the two populations and estimated them to comprise 1,985 and 29 individuals on Maria Major and Minor, respectively. The Maria Minor population is currently at a critically low level and consequently highly susceptible to demographic and genetic stochasticity and catastrophic events, in particular the colonization of invasive mammalian predators. If our goal is to conserve biodiversity and evolutionary potential we face a dilemma in formulating the optimum strategy for the management of these two threatened populations on the species boundary. We discuss some potential management options but also raise this issue for discussion in the conservation biology community. © 2006 FFI. | |||||
BibTeX:
@article{Young2006,
author = {Young, R.P. and Fa, J.E. and Ogrodowczyk, A. and Morton, M. and Lesmond, S. and Funk, S.M.},
title = {The St Lucia whiptail lizard \textit{Cnemidophorus vanzoi}: A conservation dilemma?},
journal = {ORYX},
year = {2006},
volume = {40},
number = {3},
pages = {358--361}
}
|
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| Zahl, S. | 1989 | Line transect sampling with unknown probability of detection along the transect [BibTeX] |
Biometrics 45:453--470 | ||
BibTeX:
@article{Zah89,
author = {Zahl, S.},
title = {Line transect sampling with unknown probability of detection along the transect},
journal = {Biometrics},
year = {1989},
volume = {45},
pages = {453--470}
}
|
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| Zerbini, A. | 2006 | Improving Precision in Multiple Covariate Distance Sampling: A Case Study with Whales in Alaska [BibTeX] |
: | ||
BibTeX:
@phdthesis{Zerbini2006b,
author = {Zerbini, A.},
title = {Improving Precision in Multiple Covariate Distance Sampling: A Case Study with Whales in {A}laska},
school = {University of Washington},
year = {2006}
}
|
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| Zerbini, A. N., Andriolo, A., Rocha, J. M. D., Simões-Lopes, P. C., Siciliano, S., Pizzorno, J. L., Waite, J. M., DeMaster, D. P. & VanBlaricom, G. R. | 2004 | Winter distribution and abundance of humpback whales (Megaptera novaeangliae) off Northeastern Brazil [BibTeX] |
Journal of Cetacean Research and Management 6:101--107 | ||
BibTeX:
@article{Zerbini2004,
author = {A. N. Zerbini and A. Andriolo and J. M. Da Rocha and P. C. {Simões-Lopes} and S. Siciliano and J. L. Pizzorno and J. M. Waite and D. P. {DeMaster} and G. R. {VanBlaricom}},
title = {Winter distribution and abundance of humpback whales {\textit{(Megaptera} novaeangliae}) off {Northeastern Brazil}},
journal = {Journal of Cetacean Research and Management},
year = {2004},
volume = {6},
number = {1},
pages = {101--107}
}
|
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| Zerbini, A. N., Waite, J., Durban, J. W., LeDuc, R., Dahlheim, M. E. & Wade, P. | 2006 | Estimating abundance of killer whales in the nearshore waters of the Gulf of Alaska and Aleutian Islands using line-transect sampling [BibTeX] |
Marine Biology : | ||
BibTeX:
@article{Zerbini2006,
author = {Zerbini, A. N. and J.M. Waite and J. W. Durban and R. LeDuc and M. E. Dahlheim and P.R. Wade},
title = {Estimating abundance of killer whales in the nearshore waters of the Gulf of Alaska and Aleutian Islands using line-transect sampling},
journal = {Marine Biology},
year = {2006}
}
|
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| Zerbini, A. N., Waite, J. M., Laake, J. L. & Wade, P. R. | 2006 | Abundance, trends and distribution of baleen whales off Western Alaska and the central Aleutian Islands | Deep Sea Research Part I: Oceanographic Research Papers 53:1772--1790 | URL PDF | |
| Abstract: Large whales were extensively hunted in coastal waters off Alaska, but current distribution, population sizes and trends are poorly known. Line transect surveys were conducted in coastal waters of the Aleutian Islands and the Alaska Peninsula in the summer of 2001-2003. Abundances of three species were estimated by conventional and multiple covariate distance sampling (MCDS) methods. Time series of abundance estimates were used to derive rates of increase for fin whales (Balaenoptera physalus) and humpback whales (Megaptera novaeangliae). Fin whales occurred primarily from the Kenai Peninsula to the Shumagin Islands, but were abundant only near the Semidi Islands and Kodiak. Humpback whales were found from the Kenai Peninsula to Umnak Island and were more abundant near Kodiak, the Shumagin Islands and north of Unimak Pass. Minke whales (B. acutorostrata) occurred primarily in the Aleutian Islands, with a few sightings south of the Alaska Peninsula and near Kodiak Island. Humpback whales were observed in large numbers in their former whaling grounds. In contrast, high densities of fin whales were not observed around the eastern Aleutian Islands, where whaling occurred. Average abundance estimates (95% CI) for fin, humpback and minke whales were 1652 (1142-2389), 2644 (1899-3680), and 1233 (656-2315), respectively. Annual rates of increase were estimated at 4.8% (95% CI=4.1-5.4%) for fin and 6.6% (5.2-8.6%) for humpback whales. This study provides the first estimate of the rate of increase of fin whales in the North Pacific Ocean. The estimated trends are consistent with those of other recovering baleen whales. There were no sightings of blue or North Pacific right whales, indicating the continued depleted status of these species. | |||||
BibTeX:
@article{Zerbini2006a,
author = {Zerbini, Alexandre N. and Waite, Janice M. and Laake, Jeffrey L. and Wade, Paul R.},
title = {Abundance, trends and distribution of baleen whales off Western Alaska and the central Aleutian Islands},
journal = {Deep Sea Research Part I: Oceanographic Research Papers},
year = {2006},
volume = {53},
number = {11},
pages = {1772--1790},
url = {http://www.sciencedirect.com/science/article/B6VGB-4M57H1V-1/2/b2bfdbbff5aeb5d51c6b4ade36f0720b}
}
|
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| Zhang, S. | 2009 | On parametric estimation of population abundance for line transect sampling [BibTeX] |
Environmental and Ecological Statistics : | ||
BibTeX:
@article{Zhang2009,
author = {Shunpu Zhang},
title = {On parametric estimation of population abundance for line transect sampling},
journal = {Environmental and Ecological Statistics},
year = {2009}
}
|
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| Zhang, S. | 2001 | Improvements on the kernel estimation in line transect sampling without the shoulder condition [BibTeX] |
Statistics & Probability Letters 53:249-258 | ||
BibTeX:
@article{Zhang2001,
author = {Shunpu Zhang},
title = {Improvements on the kernel estimation in line transect sampling without the shoulder condition},
journal = {Statistics \& Probability Letters},
year = {2001},
volume = {53},
pages = {249-258}
}
|
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| Zhang, S. | 2001 | Generalized likelihood ratio test for the shoulder condition in line transect sampling | Communications in Statistics - Theory and Methods 30:2343--2354 | ||
| Abstract: We propose a generalized likelihood ratio procedure for testing the shoulder condition of a detection function in line transect sampling. The proposed procedure is compared to the other existing methods for testing the shoulder condition. It is demonstrated that the new method has a much higher power than the other methods when the true detection does not possess a shoulder, while it has similar performance to the other methods when the true detection satisfies the shoulder condition. We also apply the new method to some well known data sets in line transect sampling. Copyright © 2001 by Marcel Dekker, Inc. | |||||
BibTeX:
@article{Zhang2001b,
author = {Zhang, S.},
title = {Generalized likelihood ratio test for the shoulder condition in line transect sampling},
journal = {Communications in Statistics - Theory and Methods},
year = {2001},
volume = {30},
number = {11},
pages = {2343--2354}
}
|
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| Zhang, S. | 1993 | A note on testing the shoulder condition in line transect sampling [BibTeX] |
Proceedings of Hawaii International Conference on Statistics and Related Fields : | ||
BibTeX:
@inproceedings{Zhang1993,
author = {Zhang,S.},
title = {A note on testing the shoulder condition in line transect sampling},
booktitle = {Proceedings of Hawaii International Conference on Statistics and Related Fields},
year = {1993}
}
|
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| Zhang, S., Karunamuni, R. J. & Jones, M. C. | 1999 | An Improved Estimator of the Density Function at the Boundary [BibTeX] |
Journal of the American Statistical Association 94:1231-1241 | ||
BibTeX:
@article{Zhang1999,
author = {S. Zhang and R. J. Karunamuni and M. C. Jones},
title = {An Improved Estimator of the Density Function at the Boundary},
journal = {Journal of the American Statistical Association},
year = {1999},
volume = {94},
pages = {1231-1241}
}
|
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| Zhao, X., Barlow, J., Taylor, B. L., Pitman, R. L., Wang, K., Wei, Z., Stewart, B. S., Turvey, S. T., Akamatsu, T., Reeves, R. R. & Wanga, D. | 2008 | Abundance and conservation status of the Yangtze finless porpoise in the Yangtze River, China [BibTeX] |
Biological Conservation 141:3006-3018 | ||
BibTeX:
@article{Zhao2008,
author = {Xiujiang Zhao and Jay Barlow and Barbara L. Taylor and Robert L. Pitman and Kexiong Wang and Zhuo Wei and Brent S. Stewart and Samuel T. Turvey and Tomonari Akamatsu and Randall R. Reeves and Ding Wanga},
title = {Abundance and conservation status of the {Yangtze finless porpoise in the Yangtze River, China}},
journal = {Biological Conservation},
year = {2008},
volume = {141},
pages = {3006-3018}
}
|
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| Zylstra, E. R., Steidl, R. J. & Swann, D. E. | 2010 | Evaluating Survey Methods for Monitoring a Rare Vertebrate, the Sonoran Desert Tortoise [BibTeX] |
The Journal of Wildlife Management 74:1311--1318 | DOI URL | |
BibTeX:
@article{JWMG:JWMG1252,
author = {Zylstra, Erin R. And Steidl, Robert J. And Swann, Don E.},
title = {Evaluating Survey Methods for Monitoring a Rare Vertebrate, the Sonoran Desert Tortoise},
journal = {The Journal of Wildlife Management},
publisher = {Blackwell Publishing Ltd},
year = {2010},
volume = {74},
number = {6},
pages = {1311--1318},
url = {http://dx.doi.org/10.1111/j.1937-2817.2010.tb01252.x},
doi = {10.1111/j.1937-2817.2010.tb01252.x}
}
|
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| 1981 | Estimating Numbers of Terrestrial Birds. Studies in Avian Biology No. 6 [BibTeX] |
: | |||
BibTeX:
@book{RalSco1981,,
title = {Estimating Numbers of Terrestrial Birds. Studies in Avian Biology No. 6},
publisher = {Cooper Ornithological Society},
year = {1981}
}
|
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| 2005 | Estimation of g(0) in line-transect surveys of cetaceans [BibTeX] |
: | |||
BibTeX:
@book{Thomsen2005,,
title = {Estimation of g(0) in line-transect surveys of cetaceans},
publisher = {ECS NEWSLETTER NO. 44 – SPECIAL ISSUE},
year = {2005}
}
|
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