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Investigating trophic relationships of pinnipeds in Alaska and Washington using stable isotope ratios of nitrogen and carbon

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Keith A. Hobson, John L. Sease, Richard L. Merrick, and John F. Piatt, 1997, Investigating trophic relationships of pinnipeds in Alaska and Washington using stable isotope ratios of nitrogen and carbon: Marine Mammal Science, v. 13, iss. 1.

Summary

We measured stable-nitrogen (δ15N) and stable-carbon (δ13C) isotope ratios in muscle and hair from 7 northern fur seals (Callorhinus ursinus) from the Pribilof Islands, Alaska, and 27 Steller sea lions (Eumetopias jubatus), and 14 harbor seals (Phoca vitulina) from the Gulf of Alaska and coast of Washington State, in order to contrast dietary information derived from isotopic vs. available conventional dietary studies. Stable-nitrogen-isotope analysis of muscle revealed that harbor seals were enriched over sea lions (mean δ15N = 18.6‰vs. 17.5‰) which were in turn enriched over northern fur seals (mean δ15N = 16.6‰). Trophic segregation among these species likely results primarily from differential reliance on herring (Clupea harengus), [...]

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Type Scheme Key
local-index unknown 70184364
local-pk unknown 70184364
doi http://www.loc.gov/standards/mods/mods-outline-3-5.html#identifier doi:10.1111/j.1748-7692.1997.tb00615.x
series unknown Marine Mammal Science

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journalMarine Mammal Science
parts
typevolume
value13
typeissue
value1
languageEnglish
citationTypeArticle

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