FOOTNOTES:
[15] Present address: U.S. Fish and Wildlife Service, Office of Biological Services, 1011 East Tudor Road, Anchorage, Alaska 99503.
[16] Other incidental prey were squid and atherinid fishes, both at the Farallon Islands.
[17] Other incidental prey were squid and such fishes as atherinids, Zaniolepis, Genyonemus and Peprilus at the Farallones, and atherinids, Trachurus and Heterostichus at San Diego.
[18] Other incidental prey were polychaetes at Netarts and the Farallon Islands.
[19] Principal sources: Bent 1925; Cleaver and Franett 1945; Cottam 1939; Cottam and Knappen 1939; Kortright 1942; Mabbot 1920; McGilvrey 1967; Munro and Clemens 1939; Roberts and Huntington 1959.
[20] Other incidental items were the fish Cololabis and Peprilus at the Farallon Islands.
[21] Other incidental items were myctophid fish in northeastern Canada.
[22] Other incidental items included the lamprey (Lampetra) at the Farallon Islands.
[23] Bent (1946) listed "fish" as prey.
[24] Grinnell (1897) listed "fish" as the major dietary component.
[25] Bédard (1969a) also listed "fish" as an incidental item.
[26] Other incidental prey were copepods and isopods.
[27] Other incidental prey were pholids in Denmark.
[28] Other incidental prey were copepods and cephalopods in North Atlantic areas.
[29] Other incidental prey were isopods in western North America and fish eggs near Vancouver Island.
[30] Other incidental prey were fish eggs in Denmark.
[31] Offal from wounded whales and seals, and bits of food, primarily crustaceans and fish, from feeding whales are important scavenger foods (Bent 1922).
[32] Other incidental prey were isopods in the North Pacific.
[33] Other incidental prey were the fish Merluccius at the Farallon Islands.
[34] Other incidental prey were isopods near the Pribilofs and in the Chukchi Sea, and amphipods in the latter area; Bent (1921) considered "crustaceans" to be major prey.
[35] Study conducted during period of breeding failure.
[36] These are the "food categories" of Tables 11-15. Items included in diets are not included here.
[37] Proportion based on the arbitrary assumption that half (5) of the 11 species in question catch and eat birds at sea.
[38] Information on body sizes (length) is from Robbins et al. (1966).
[39] Information on bill lengths is from Palmer (1962), Dement'ev et al. (1968), and Friedmann (1950).
[40] Feeding methods are from Ashmole (1971) as adapted by Ainley (unpubl. manuscr.).