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Seasonal variation in nutrient composition of Alaskan walleye pollock (Theragra chalcogramma) and its effect on the nutritional status of Steller sea lions (Eumetopias jubatus) Azana, Cynthia Dy Prieto

Abstract

Steller sea lions (Eumetopias jubatus) in the Gulf of Alaska declined since the late 1970s. Their population decline might be related to a shift in their diet from fatty, high-calorie fishes such as herring (Clupea pallasi) to low energy density fish such as walleye pollock (Theragara chalcogrammd). I compared the nutritional value of herring with pollock and explored seasonal changes in the nutrient content of pollock. I also compared the nutritional status of three captive Steller sea lions fed pollock and herring. Herring was a more concentrated in dietary lipid (p

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