ЛЕТНЕЕ ПИТАНИЕ СИВУЧА В ВОДАХ ДАЛЬНЕГО ВОСТОКА РОССИИ В 2004–2008 ГОДАХ

The diet of Steller sea lion Eumetopias jubatus was studied based on undigested food parts found in feces collected the summer season 20 rookeries Russian Far East. A total 915 samples were analyzed between 2004 and 2008, which 65 items identified. frequency occurrence 11 greater than 5%, including Atka mackerel Pleurogrammus monopterygius (64.8%), Pollock Theragra chalcogramma (44.3%), Pacific salmon Salmonidae (20.5%), Irish lord Hemilepidotus sp. (20.4%), sand lance Ammodytes hexapterus (15.8%), herring Clupea pallasi (9.5%), Squid Octopus Cephalopoda (8.4%), cod Gadus macrocephalus (5, 9%), sandfish Trichodon trichodon (5.9%), Flatfishes Pleuronectidae (5.8%), Threespine stickleback Gasterosteus aculaeatus (4.9%). Three regions with different diets identified – Sea Okhotsk, Kuril Islands, Kamchatka Commander Islands. In Herring (83.6% by occurrence) dominated among remains feces. at Islands variable within region. general pattern a low diversity each Island sites predominance 1-3 items, probably most accessible near (Pollock, Octopus, mackerel, salmon). characterized high diversity. contrast to other regions, includes proportion small non-commercial species Sand lance, lord, sandfish, Flatfishes, others. regional patterns show spatial distribution areas abundant biomass main items. lions from differed haulouts having higher content Long-term changes structure not statistically significant.