ŽRŠK’¹Œ¤•ñ (J. Yamashima Inst. Ornithol.), 30;101-108, 1998
Benthic and pelagic foraging of two Japanese cormorants, determined by similtaneous recording of location and diving activity
Akiko Kato, Yutaka Watanuki and Yasuhiko Naito
One male and one female Japanese cormorants, Phalacrocorax filamentosus, breeding at Terui Island, Hokkaido, foraged within 5 km of the island and in the strait between the island and mainland (17-27 km from the island). The foraging range of Japanese cormorants appeared to be limited to the neritic water between 10 and 60 m sea depth, where the seabed sediment was mainly rock and sand. Both birds showed high foraging site fidelity, with the male foraging to the south-east and the female to the north-east of the island. The male sometimes foraged in shallow water (<40 m), possibility feeding demersal fish. In deep water (>40 m), the male may have fed on epipelagic schooling fish. In contrast, the female did not reach the sea-bottom in deep or shallow waters, and it may have fed on epipelagic schooling fish.
BD98-1
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