Lack of sequence variation of Y chromosome-linked loci in Steller’s sea lions (Eumetopias jubatus) from Iony Island and the Kuril Islands
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A Review of Marine Mammal Deterrents and Their Possible Applications to Limit Killer Whale ( Orcinus orca) Predation on Steller Sea Lions (Eumetopias jubatus)
This report does not constitute a publication and is for information only. All data herein are to be considered provisional. Abstract The population of Steller sea lions (Eumetopias jubatus) in the western Aleutian Islands has declined significantly and is currently listed as an endangered species. Among the possible limiting factors for this population is predation by transient killer whales (...
متن کاملNo Evidence of Metabolic Depression in Western Alaskan Juvenile Steller Sea Lions (Eumetopias jubatus)
Steller sea lion (Eumetopias jubatus) populations have undergone precipitous declines through their western Alaskan range over the last four decades with the leading hypothesis to explain this decline centering around changing prey quality, quantity, or availability for this species (i.e., nutritional stress hypothesis). Under chronic conditions of reduced food intake sea lions would conserve e...
متن کاملPrey consumption of Steller sea lions (Eumetopias jubatus) off Alaska: How much prey do they require?
The effects of seasonal and regional differences in diet composition on the food requirements of Steller sea lions (Eumetopias jubatus) were esti mated by using a bioenergetic model. The model considered differences in the energy density of the prey, and dif ferences in digestive efficiency and the heat increment of feeding of different diets. The model predicted that Steller sea lions in sou...
متن کاملInfectious disease and the decline of Steller sea lions (Eumetopias jubatus) in Alaska, USA: insights from serologic data.
Serologic data were examined to determine whether infectious disease may have played a role in the decline of Steller sea lions (Eumetopias jubatus) in the Gulf of Alaska and Aleutian Islands, USA. Available published data, unpublished data, and recent collections (1997-2000) were compared and reviewed. Data were stratified by geography to compare the declining western Alaskan population in the...
متن کاملSeasonal Differences in Prey Availability Around a Steller Sea Lion Haulout and Rookery in the Gulf of Alaska
Abundance and distribution of fish biomass were surveyed around a Steller sea lion (Eumetopias jubatus) haulout (nonbreeding) and rookery (breeding) site in the Gulf of Alaska to test the hypothesis that seasonal occupation of either site was related to the availability of prey. The haulout and rookery are located 30 nmi (55.56 km) apart at Long Island and Marmot Island in the Central Gulf of A...
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