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
♦ ²Seabird distribution, abundance and diets in the eastern and central Aleutian Islands, J. JAHNCKE, K. O. COYLE AND GEORGE L. HUNT, JR, Fish. Oceanogr. 14 (Suppl. 1), 160–177, 2005