Steller sea lions and fisheries : competition at sea? ...
A leading hypothesis to explain the decline of Steller sea lions (Eumetopias jubatus) in western Alaska is the reduction of prey abundance or change in prey distributions caused by commercial fisheries. We sought to improve on past studies that attempted to assess competition between sea lions and f...
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University of British Columbia
2011
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Online Access: | https://dx.doi.org/10.14288/1.0071644 https://doi.library.ubc.ca/10.14288/1.0071644 |
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ftdatacite:10.14288/1.0071644 2023-08-27T04:08:45+02:00 Steller sea lions and fisheries : competition at sea? ... Hui, Tabitha Cheng Yee 2011 https://dx.doi.org/10.14288/1.0071644 https://doi.library.ubc.ca/10.14288/1.0071644 en eng University of British Columbia Text article-journal ScholarlyArticle 2011 ftdatacite https://doi.org/10.14288/1.0071644 2023-08-07T14:24:23Z A leading hypothesis to explain the decline of Steller sea lions (Eumetopias jubatus) in western Alaska is the reduction of prey abundance or change in prey distributions caused by commercial fisheries. We sought to improve on past studies that attempted to assess competition between sea lions and fisheries by estimating the local amounts of prey accessible to sea lions. We explored the relationships between sea lion population trends, fishery catches and the prey biomass accessible to sea lions around 33 rookeries from 2000-2008. We focused on three commercially important species that dominate the sea lion diet: walleye pollock, Pacific cod and Atka mackerel. We estimated available prey biomass by removing fishery catches from predicted prey biomass distributions in the Aleutian Islands, Bering Sea and Gulf of Alaska; and modelled the likelihood of sea lions foraging at different distances from rookeries (accessibility) using satellite telemetry locations of tracked animals. We combined this accessibility ... Text Bering Sea Alaska Aleutian Islands DataCite Metadata Store (German National Library of Science and Technology) Bering Sea Gulf of Alaska Pacific Atka ENVELOPE(151.789,151.789,60.835,60.835) |
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Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
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ftdatacite |
language |
English |
description |
A leading hypothesis to explain the decline of Steller sea lions (Eumetopias jubatus) in western Alaska is the reduction of prey abundance or change in prey distributions caused by commercial fisheries. We sought to improve on past studies that attempted to assess competition between sea lions and fisheries by estimating the local amounts of prey accessible to sea lions. We explored the relationships between sea lion population trends, fishery catches and the prey biomass accessible to sea lions around 33 rookeries from 2000-2008. We focused on three commercially important species that dominate the sea lion diet: walleye pollock, Pacific cod and Atka mackerel. We estimated available prey biomass by removing fishery catches from predicted prey biomass distributions in the Aleutian Islands, Bering Sea and Gulf of Alaska; and modelled the likelihood of sea lions foraging at different distances from rookeries (accessibility) using satellite telemetry locations of tracked animals. We combined this accessibility ... |
format |
Text |
author |
Hui, Tabitha Cheng Yee |
spellingShingle |
Hui, Tabitha Cheng Yee Steller sea lions and fisheries : competition at sea? ... |
author_facet |
Hui, Tabitha Cheng Yee |
author_sort |
Hui, Tabitha Cheng Yee |
title |
Steller sea lions and fisheries : competition at sea? ... |
title_short |
Steller sea lions and fisheries : competition at sea? ... |
title_full |
Steller sea lions and fisheries : competition at sea? ... |
title_fullStr |
Steller sea lions and fisheries : competition at sea? ... |
title_full_unstemmed |
Steller sea lions and fisheries : competition at sea? ... |
title_sort |
steller sea lions and fisheries : competition at sea? ... |
publisher |
University of British Columbia |
publishDate |
2011 |
url |
https://dx.doi.org/10.14288/1.0071644 https://doi.library.ubc.ca/10.14288/1.0071644 |
long_lat |
ENVELOPE(151.789,151.789,60.835,60.835) |
geographic |
Bering Sea Gulf of Alaska Pacific Atka |
geographic_facet |
Bering Sea Gulf of Alaska Pacific Atka |
genre |
Bering Sea Alaska Aleutian Islands |
genre_facet |
Bering Sea Alaska Aleutian Islands |
op_doi |
https://doi.org/10.14288/1.0071644 |
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1775349625698385920 |