Attributes / relations provided by
♦ ¹Diet analysis of Pacific sardine (Sardinops sagax) off the west coast of Vancouver Island, British Columbia from 1997 to 2008, Gordon McFarlane, Jacob Schweigert, Jackie Detering and Vanessa Hodes, Pacific Biological Station, Fisheries & Oceans Canada
♦ 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
♦ ³Blue whale habitat and prey in the California Channel Islands, Paul C. Fiedler, Stephen B. Reilly, Roger P. Hewitt, David Demer, Valerie A. Philbrick, Susan Smith, Wesley Armstrong, Donald A. Croll, Bernie R. Tershy, Bruce R. Mate, Deep-Sea Research II 45 (1998) 1781-1801