Attributes / relations provided by
♦ ¹Food Web Relationships of Northern Puget Sound and the Strait of Juan de Fuca : a Synthesis of the Available Knowledge, Charles A. Simenstad, Bruce S. Miller, Carl F. Nyblade, Kathleen Thornburgh, and Lewis J. Bledsoe, EPA-600 7-29-259 September 1979
♦ ²Feeding of Bearded Seals in the Bering and Chukchi Seas and Trophic Interaction with Pacific Walruses, LLOYD F. LOWRY, KATHRYN J. FROST, AND JOHN J. BURNS, ARCTIC VOL. 33, NO. 2 (JUNE 1980). P. 330-342
♦ ³An estimate of summer food consumption of six seabird species in Iceland, K. Lilliendahl and J. Solmundsson, ICES Journal of Marine Science, 54: 624–630. 1997
♦ ⁴The role of capelin (Mallotus villosus) in the foodweb of the Barents Sea, A. V. Dolgov, ICES Journal of Marine Science, 59: 1034–1045. 2002