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Marine megafauna species are affected by a wide range of anthropogenic threats. To evaluate the risk of such threats, species’ vulnerability to each threat must first be determined. We build on the existing threats classification scheme and ranking system of the International Union for Conservation of Nature (IUCN) Red List of Threatened Species by assessing the vulnerability of 256 marine megafauna species to 23 at‐sea threat...
Variation in milk, serum, and blubber fatty acids in young, free‐ranging Steller sea lionsNARA Subscribed
We determined the fatty acid signatures in milk, serum, and blubber samples collected from young free‐ranging Steller sea lions ( Eumetopias jubatus ) and investigated the partitioning of fatty acids among these matrices. We assessed the relationship of fatty acids in each matrix with region, age, season, sex, and body condition to gain information needed to determine the most appropriate type of samples to collect and analyze...
Comparing total body lipid content of young‐of‐the‐year Steller sea lions among regions of contrasting population trendsNARA Subscribed
Steller sea lion ( Eumetopias jubatus ) young‐of‐the‐year ( YOY ) are nutritionally dependent upon their dam through the majority of their first year. Several indices of body condition were measured in YOY 1.5–9 mo of age captured in Southeast Alaska ( n = 122), the Gulf of Alaska ( n = 182), and the Aleutian Islands ( n = 38) to test the hypothesis that nutritional stress impacted the ability of adult female Steller sea lions...
Immature Steller sea lion ( Eumetopias jubatus ) dive activity in relation to habitat features of the eastern Aleutian IslandsNARA Subscribed
Current flow and bathymetry in the Aleutian Islands define unique habitats that influence prey distribution and foraging behaviour of top‐level predators. We explored whether oceanographic features and bathymetry influenced the diving activity of 30 immature sea lions (ages 5–21 months) equipped with satellite‐linked depth recorders in the eastern Aleutian Islands (EAI) during 2000–02. Sea surface temperature (SST) and chlorop...
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