Attributes / relations provided by
♦ ¹Winter Diet of Atlantic Puffins (Fratercula arctica) in the Northeast Atlantic, Knud Falk, Jens-Kjeld Jensen and Kaj Kampp, Colonial Waterbirds, Vol. 15, No. 2 (1992), pp. 230-235
♦ ²The role of capelin (Mallotus villosus) in the foodweb of the Barents Sea, A. V. Dolgov, ICES Journal of Marine Science, 59: 1034–1045. 2002
♦ ³Food 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