Attributes / relations provided by
♦ ¹Flight destinations and foraging behaviour of northern gannets (Sula bassana) preying on a small forage fish in a low-Arctic ecosystem, Stefan Garthea, William A. Montevecchi, Gail K. Davoren, Deep-Sea Research II 54 (2007) 311–320
♦ ²Food 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