Pacific Walrus (Odobenus rosmarus divergens) Resource Selection in the Northern Bering Sea
The Pacific walrus is a large benthivore with an annual range extending across the continental shelves of the Bering and Chukchi Seas. We used a discrete choice model to estimate site selection by adult radio-tagged walruses relative to the availability of the caloric biomass of benthic infauna and...
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ftpubmed:oai:pubmedcentral.nih.gov:3981674 2023-05-15T15:43:17+02:00 Pacific Walrus (Odobenus rosmarus divergens) Resource Selection in the Northern Bering Sea Jay, Chadwick V. Grebmeier, Jacqueline M. Fischbach, Anthony S. McDonald, Trent L. Cooper, Lee W. Hornsby, Fawn 2014-04-09 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3981674 http://www.ncbi.nlm.nih.gov/pubmed/24717979 https://doi.org/10.1371/journal.pone.0093035 en eng Public Library of Science http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3981674 http://www.ncbi.nlm.nih.gov/pubmed/24717979 http://dx.doi.org/10.1371/journal.pone.0093035 This is an open-access article, free of all copyright, and may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose. The work is made available under the Creative Commons CC0 public domain dedication. PDM CC0 Research Article Text 2014 ftpubmed https://doi.org/10.1371/journal.pone.0093035 2014-04-13T00:54:48Z The Pacific walrus is a large benthivore with an annual range extending across the continental shelves of the Bering and Chukchi Seas. We used a discrete choice model to estimate site selection by adult radio-tagged walruses relative to the availability of the caloric biomass of benthic infauna and sea ice concentration in a prominent walrus wintering area in the northern Bering Sea (St. Lawrence Island polynya) in 2006, 2008, and 2009. At least 60% of the total caloric biomass of dominant macroinfauna in the study area was composed of members of the bivalve families Nuculidae, Tellinidae, and Nuculanidae. Model estimates indicated walrus site selection was related most strongly to tellinid bivalve caloric biomass distribution and that walruses selected lower ice concentrations from the mostly high ice concentrations that were available to them (quartiles: 76%, 93%, and 99%). Areas with high average predicted walrus site selection generally coincided with areas of high organic carbon input identified in other studies. Projected decreases in sea ice in the St. Lawrence Island polynya and the potential for a concomitant decline of bivalves in the region could result in a northward shift in the wintering grounds of walruses in the northern Bering Sea. Text Bering Sea Chukchi Odobenus rosmarus Sea ice St Lawrence Island walrus* PubMed Central (PMC) Bering Sea Lawrence Island ENVELOPE(-103.718,-103.718,56.967,56.967) Pacific PLoS ONE 9 4 e93035 |
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English |
topic |
Research Article |
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Research Article Jay, Chadwick V. Grebmeier, Jacqueline M. Fischbach, Anthony S. McDonald, Trent L. Cooper, Lee W. Hornsby, Fawn Pacific Walrus (Odobenus rosmarus divergens) Resource Selection in the Northern Bering Sea |
topic_facet |
Research Article |
description |
The Pacific walrus is a large benthivore with an annual range extending across the continental shelves of the Bering and Chukchi Seas. We used a discrete choice model to estimate site selection by adult radio-tagged walruses relative to the availability of the caloric biomass of benthic infauna and sea ice concentration in a prominent walrus wintering area in the northern Bering Sea (St. Lawrence Island polynya) in 2006, 2008, and 2009. At least 60% of the total caloric biomass of dominant macroinfauna in the study area was composed of members of the bivalve families Nuculidae, Tellinidae, and Nuculanidae. Model estimates indicated walrus site selection was related most strongly to tellinid bivalve caloric biomass distribution and that walruses selected lower ice concentrations from the mostly high ice concentrations that were available to them (quartiles: 76%, 93%, and 99%). Areas with high average predicted walrus site selection generally coincided with areas of high organic carbon input identified in other studies. Projected decreases in sea ice in the St. Lawrence Island polynya and the potential for a concomitant decline of bivalves in the region could result in a northward shift in the wintering grounds of walruses in the northern Bering Sea. |
format |
Text |
author |
Jay, Chadwick V. Grebmeier, Jacqueline M. Fischbach, Anthony S. McDonald, Trent L. Cooper, Lee W. Hornsby, Fawn |
author_facet |
Jay, Chadwick V. Grebmeier, Jacqueline M. Fischbach, Anthony S. McDonald, Trent L. Cooper, Lee W. Hornsby, Fawn |
author_sort |
Jay, Chadwick V. |
title |
Pacific Walrus (Odobenus rosmarus divergens) Resource Selection in the Northern Bering Sea |
title_short |
Pacific Walrus (Odobenus rosmarus divergens) Resource Selection in the Northern Bering Sea |
title_full |
Pacific Walrus (Odobenus rosmarus divergens) Resource Selection in the Northern Bering Sea |
title_fullStr |
Pacific Walrus (Odobenus rosmarus divergens) Resource Selection in the Northern Bering Sea |
title_full_unstemmed |
Pacific Walrus (Odobenus rosmarus divergens) Resource Selection in the Northern Bering Sea |
title_sort |
pacific walrus (odobenus rosmarus divergens) resource selection in the northern bering sea |
publisher |
Public Library of Science |
publishDate |
2014 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3981674 http://www.ncbi.nlm.nih.gov/pubmed/24717979 https://doi.org/10.1371/journal.pone.0093035 |
long_lat |
ENVELOPE(-103.718,-103.718,56.967,56.967) |
geographic |
Bering Sea Lawrence Island Pacific |
geographic_facet |
Bering Sea Lawrence Island Pacific |
genre |
Bering Sea Chukchi Odobenus rosmarus Sea ice St Lawrence Island walrus* |
genre_facet |
Bering Sea Chukchi Odobenus rosmarus Sea ice St Lawrence Island walrus* |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3981674 http://www.ncbi.nlm.nih.gov/pubmed/24717979 http://dx.doi.org/10.1371/journal.pone.0093035 |
op_rights |
This is an open-access article, free of all copyright, and may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose. The work is made available under the Creative Commons CC0 public domain dedication. |
op_rightsnorm |
PDM CC0 |
op_doi |
https://doi.org/10.1371/journal.pone.0093035 |
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PLoS ONE |
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9 |
container_issue |
4 |
container_start_page |
e93035 |
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