Cape Fur Seal Arctocephalus pusillus predation on Cape Cormorants Phalacrocorax capensis and other birds at Dyer Island, South Africa
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Predation on seabirds by fur seals and sea lions (Otariidae) has been widely reported (Glegg 1945, Hamilton 1946, Spellerberg 1975, Bonner 1981, Bonner & Hunter 1982, Lucas & McLaren 1988, Gjertz 1990, Riedman 1990). The incidents were, however, at low levels of intensity and the predatory behaviour appeared to have been restricted to small subgroups. Penguins (Spheniscidae) and auks (Alcidae) are the families most commonly preyed upon, whereas petrels (Procellariidae), ducks (Anatidae), gulls (Laridae), and other bird families have been occasionally reported as prey. Curiously, seal predation on seabirds was not discussed by Burger (1988), in a major review of marine homoiotherm interactions......