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Paredes, Rosana; Orben, Rachael A.; Roby, Daniel D.; Irons, David B.; Young, Rebecca; Renner, Heather; Tremblay, Yann; Will, Alexis; Harding, Ann M. A.; Kitaysky, Alexander S.. |
Causes and consequences of differences in seabird foraging strategies between breeding colonies are not well understood. We tested whether body size of a pursuit-diving seabird, the thick-billed murre Uria lomvia, differs between breeding colonies and, if so, how size differences can be understood in the context of differences in foraging behavior, habitat use, and breeding performance. We measured adult murres over 3 seasons (2008 to 2010) at 2 of the Pribilof Islands, St. Paul and St. George, located on the continental shelf of the Bering Sea at different distances from the shelf break. Body mass and size were positively associated with deep diving and negatively associated with long flights, suggesting morphology influences foraging and commuting... |
Tipo: Text |
Palavras-chave: Body size; Foraging; Diving; Marine habitats; Stress levels; Bering Sea; Murres; Seabirds. |
Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00626/73837/73678.pdf |
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Meyer, Vera D.; Max, Lars; Hefter, Jens; Tiedemann, Ralf; Mollenhauer, Gesine. |
It has been proposed that North Pacific sea surface temperature (SST) evolution was intimately linked to North Atlantic climate oscillations during the last glacial-interglacial transition. However, during the early deglaciation and the Last Glacial Maximum, the SST development in the subarctic northwest Pacific and the Bering Sea is poorly constrained as most existing deglacial SST records are based on alkenone paleothermometry, which is limited prior to 15ka B.P. in the subarctic North Pacific realm. By applying the TEX86L temperature proxy we obtain glacial-Holocene-SST records for the marginal northwest Pacific and the Western Bering Sea. Our TEX86L-based records and existing alkenone data suggest that during the past 15.5ka, SSTs in the northwest... |
Tipo: Text |
Palavras-chave: TEX86L; Surface circulation; Northwest Pacific; Bering Sea; Deglaciation. |
Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00421/53231/54786.pdf |
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Haynie, Alan C; Resource Ecology and Fisheries Management Division, Alaska Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration; alan.haynie@noaa.gov; Huntington, Henry P; Eagle River, Alaska; hph@alaska.net. |
Human-environment connections are the subject of much study, and the details of those connections are crucial factors in effective environmental management. In a large, interdisciplinary study of the eastern Bering Sea ecosystem involving disciplines from physical oceanography to anthropology, one of the research teams examined commercial fisheries and another looked at subsistence harvests by Alaska Natives. Commercial fisheries and subsistence harvests are extensive, demonstrating strong connections between the ecosystem and the humans who use it. At the same time, however, both research teams concluded that the influence of ecosystem conditions on the outcomes of human activities was weaker than anticipated. Likely explanations of this apparently loose... |
Tipo: Peer-Reviewed Reports |
Palavras-chave: Bering Sea; Commercial fisheries; Ecosystem studies; Human-environment connections; Subsistence. |
Ano: 2016 |
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