Foraging by murres (Uria spp.) at tidal fronts surrounding the Pribilof Islands, Alaska, USA
We investigated the foraging distribution of 2 species of murres (Uria lomvia and U. aalge) in relation to Acoustically Determined Biomass (ADB) and hydrographic structure surrounding the Pribilof Islands, Bering Sea, Alaska, USA. The distribution and abundance of both murre species were similar; th...
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eScholarship, University of California
1996
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ftcdlib:oai:escholarship.org/ark:/13030/qt2r4974ff 2023-05-15T15:43:28+02:00 Foraging by murres (Uria spp.) at tidal fronts surrounding the Pribilof Islands, Alaska, USA Decker, MB Hunt, GL 1 - 10 1996-08-29 application/pdf https://escholarship.org/uc/item/2r4974ff unknown eScholarship, University of California qt2r4974ff https://escholarship.org/uc/item/2r4974ff CC-BY CC-BY Marine Ecology Progress Series, vol 139, iss 1-3 seabird distribution tidal fronts Uria lomvia Uria aalge murres Bering Sea Marine Biology & Hydrobiology Ecology Zoology Oceanography article 1996 ftcdlib 2020-03-20T23:55:48Z We investigated the foraging distribution of 2 species of murres (Uria lomvia and U. aalge) in relation to Acoustically Determined Biomass (ADB) and hydrographic structure surrounding the Pribilof Islands, Bering Sea, Alaska, USA. The distribution and abundance of both murre species were similar; therefore, we combined data for thick-billed and common murres in the analysis. We found that murre densities were higher in frontal regions than in non frontal regions. Maximum ADB was also found to be elevated in the frontal zone. Within frontal regions, high densities of murres were associated with regions containing relatively high levels of ADB. In contrast, we did not find significant correlations between murre density and ADB in the study area as a whole. We postulate that murres restrict their foraging to the frontal region because prey can be located more predictably within this zone than in other areas in the vicinity of the Pribilof Islands. Article in Journal/Newspaper Bering Sea Uria aalge Uria lomvia Alaska uria University of California: eScholarship Bering Sea |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
seabird distribution tidal fronts Uria lomvia Uria aalge murres Bering Sea Marine Biology & Hydrobiology Ecology Zoology Oceanography |
spellingShingle |
seabird distribution tidal fronts Uria lomvia Uria aalge murres Bering Sea Marine Biology & Hydrobiology Ecology Zoology Oceanography Decker, MB Hunt, GL Foraging by murres (Uria spp.) at tidal fronts surrounding the Pribilof Islands, Alaska, USA |
topic_facet |
seabird distribution tidal fronts Uria lomvia Uria aalge murres Bering Sea Marine Biology & Hydrobiology Ecology Zoology Oceanography |
description |
We investigated the foraging distribution of 2 species of murres (Uria lomvia and U. aalge) in relation to Acoustically Determined Biomass (ADB) and hydrographic structure surrounding the Pribilof Islands, Bering Sea, Alaska, USA. The distribution and abundance of both murre species were similar; therefore, we combined data for thick-billed and common murres in the analysis. We found that murre densities were higher in frontal regions than in non frontal regions. Maximum ADB was also found to be elevated in the frontal zone. Within frontal regions, high densities of murres were associated with regions containing relatively high levels of ADB. In contrast, we did not find significant correlations between murre density and ADB in the study area as a whole. We postulate that murres restrict their foraging to the frontal region because prey can be located more predictably within this zone than in other areas in the vicinity of the Pribilof Islands. |
format |
Article in Journal/Newspaper |
author |
Decker, MB Hunt, GL |
author_facet |
Decker, MB Hunt, GL |
author_sort |
Decker, MB |
title |
Foraging by murres (Uria spp.) at tidal fronts surrounding the Pribilof Islands, Alaska, USA |
title_short |
Foraging by murres (Uria spp.) at tidal fronts surrounding the Pribilof Islands, Alaska, USA |
title_full |
Foraging by murres (Uria spp.) at tidal fronts surrounding the Pribilof Islands, Alaska, USA |
title_fullStr |
Foraging by murres (Uria spp.) at tidal fronts surrounding the Pribilof Islands, Alaska, USA |
title_full_unstemmed |
Foraging by murres (Uria spp.) at tidal fronts surrounding the Pribilof Islands, Alaska, USA |
title_sort |
foraging by murres (uria spp.) at tidal fronts surrounding the pribilof islands, alaska, usa |
publisher |
eScholarship, University of California |
publishDate |
1996 |
url |
https://escholarship.org/uc/item/2r4974ff |
op_coverage |
1 - 10 |
geographic |
Bering Sea |
geographic_facet |
Bering Sea |
genre |
Bering Sea Uria aalge Uria lomvia Alaska uria |
genre_facet |
Bering Sea Uria aalge Uria lomvia Alaska uria |
op_source |
Marine Ecology Progress Series, vol 139, iss 1-3 |
op_relation |
qt2r4974ff https://escholarship.org/uc/item/2r4974ff |
op_rights |
CC-BY |
op_rightsnorm |
CC-BY |
_version_ |
1766377625505234944 |