Inter-annual variability in the proportional contribution of higher trophic levels to the diet of Pacific walruses

Author: Seymour J.   Horstmann-Dehn L.   Wooller M.  

Publisher: Springer Publishing Company

ISSN: 0722-4060

Source: Polar Biology, Vol.37, Iss.5, 2014-05, pp. : 597-609

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