ORIGINAL PAPER Photographic mark-recapture analysis of clustered mammal-eating killer whales around the Aleutian Islands and Gulf of Alaska
Abstract We used photographic mark-recapture methods to estimate the number of mammal-eating ‘‘transient’’ killer whales using the coastal waters from the central Gulf of Alaska to the central Aleutian Islands, around breeding rookeries of endangered Steller sea lions. We identified 154 individual k...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.662.3197 2023-05-15T18:48:43+02:00 ORIGINAL PAPER Photographic mark-recapture analysis of clustered mammal-eating killer whales around the Aleutian Islands and Gulf of Alaska J. Durban D. Ellifrit M. Dahlheim J. Waite C. Matkin L. Barrett-lennard G. Ellis R. Pitman R. Leduc P. Wade The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.662.3197 http://www.marinemammal.org/wp-content/pdfs/Durban_et_al_2010.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.662.3197 http://www.marinemammal.org/wp-content/pdfs/Durban_et_al_2010.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.marinemammal.org/wp-content/pdfs/Durban_et_al_2010.pdf text ftciteseerx 2016-01-08T16:55:56Z Abstract We used photographic mark-recapture methods to estimate the number of mammal-eating ‘‘transient’’ killer whales using the coastal waters from the central Gulf of Alaska to the central Aleutian Islands, around breeding rookeries of endangered Steller sea lions. We identified 154 individual killer whales from 6,489 photographs collected between July 2001 and August 2003. A Bayesian mixture model estimated seven distinct clusters (95 % probability interval = 7–10) of individuals that were differentially covered by 14 boat-based surveys exhibiting varying degrees of association in space and time. Markov Chain Monte Carlo methods were used to sample identification probabilities across the distribution of clusters to estimate a total of 345 identified and undetected whales (95 % prob-ability interval = 255–487). Estimates of covariance between surveys, in terms of their coverage of these clus-ters, indicated spatial population structure and seasonal movements from these near-shore waters, suggesting spa-tial and temporal variation in the predation pressure on coastal marine mammals. Text Alaska Aleutian Islands Unknown Gulf of Alaska |
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ftciteseerx |
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English |
description |
Abstract We used photographic mark-recapture methods to estimate the number of mammal-eating ‘‘transient’’ killer whales using the coastal waters from the central Gulf of Alaska to the central Aleutian Islands, around breeding rookeries of endangered Steller sea lions. We identified 154 individual killer whales from 6,489 photographs collected between July 2001 and August 2003. A Bayesian mixture model estimated seven distinct clusters (95 % probability interval = 7–10) of individuals that were differentially covered by 14 boat-based surveys exhibiting varying degrees of association in space and time. Markov Chain Monte Carlo methods were used to sample identification probabilities across the distribution of clusters to estimate a total of 345 identified and undetected whales (95 % prob-ability interval = 255–487). Estimates of covariance between surveys, in terms of their coverage of these clus-ters, indicated spatial population structure and seasonal movements from these near-shore waters, suggesting spa-tial and temporal variation in the predation pressure on coastal marine mammals. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
J. Durban D. Ellifrit M. Dahlheim J. Waite C. Matkin L. Barrett-lennard G. Ellis R. Pitman R. Leduc P. Wade |
spellingShingle |
J. Durban D. Ellifrit M. Dahlheim J. Waite C. Matkin L. Barrett-lennard G. Ellis R. Pitman R. Leduc P. Wade ORIGINAL PAPER Photographic mark-recapture analysis of clustered mammal-eating killer whales around the Aleutian Islands and Gulf of Alaska |
author_facet |
J. Durban D. Ellifrit M. Dahlheim J. Waite C. Matkin L. Barrett-lennard G. Ellis R. Pitman R. Leduc P. Wade |
author_sort |
J. Durban |
title |
ORIGINAL PAPER Photographic mark-recapture analysis of clustered mammal-eating killer whales around the Aleutian Islands and Gulf of Alaska |
title_short |
ORIGINAL PAPER Photographic mark-recapture analysis of clustered mammal-eating killer whales around the Aleutian Islands and Gulf of Alaska |
title_full |
ORIGINAL PAPER Photographic mark-recapture analysis of clustered mammal-eating killer whales around the Aleutian Islands and Gulf of Alaska |
title_fullStr |
ORIGINAL PAPER Photographic mark-recapture analysis of clustered mammal-eating killer whales around the Aleutian Islands and Gulf of Alaska |
title_full_unstemmed |
ORIGINAL PAPER Photographic mark-recapture analysis of clustered mammal-eating killer whales around the Aleutian Islands and Gulf of Alaska |
title_sort |
original paper photographic mark-recapture analysis of clustered mammal-eating killer whales around the aleutian islands and gulf of alaska |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.662.3197 http://www.marinemammal.org/wp-content/pdfs/Durban_et_al_2010.pdf |
geographic |
Gulf of Alaska |
geographic_facet |
Gulf of Alaska |
genre |
Alaska Aleutian Islands |
genre_facet |
Alaska Aleutian Islands |
op_source |
http://www.marinemammal.org/wp-content/pdfs/Durban_et_al_2010.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.662.3197 http://www.marinemammal.org/wp-content/pdfs/Durban_et_al_2010.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766241963669979136 |