Seasonal and spatial differences in diet in the western stock of Steller sea lions (Eumetopias jubatus (2002)
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| Venue: | J. Mammal |
| Citations: | 33 - 0 self |
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@ARTICLE{Sinclair02seasonaland,
author = {Elizabeth Sinclair and E. H. Sinclair},
title = {Seasonal and spatial differences in diet in the western stock of Steller sea lions (Eumetopias jubatus},
journal = {J. Mammal},
year = {2002}
}
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Abstract
Prey remains identified from 3,762 scats (feces) collected 1990-1998, on summer and winter island sites across the range of the U.S. western stock of Steller sea lions depict walleye pollock (Theragra chalcogramma) and Atka mackerel (Pleurogrammus monopterygius) as the two dominant prey species, followed by Pacific salmon (Salmonidae) and Pacific cod (Gadus macrocephalus). Other primary prey species included Arrowtooth flounder (Atheresthes stomias), Pacific herring (Clupea pallasi), Pacific sand lance (Ammodytes hexapterus), Irish lord (Hemilepidotus sp.), and cephalopods (squid and octopus). Species that occurred among the top three prey items on select islands included: snailfish (Liparididae), rock greenling (Hexagrammos lagocephalus), kelp greenling (Hexagrammos decagrammus), sandfish (Trichodon trichodon), rock sole (Lepidopsetta bilineata), northern smoothtongue (Leuroglossus schmidti), skate (Rajidae), and smelt (Osmeridae). Capelin (Mallotus villosus) occurred in very low frequencies in this study despite their predominance in Steller sea lion diet prior to the 1980s. 1 Correspondent:
