Feeding habits of Pacific black halibut Reinhardtius hippoglossoides matsuurae Jordan et Snyder, 1901 and Kamchatka flounder Atheresthes evermanni Jordan et Starks, 1904 in the western North Pacific

摘要

The diets of Pacific black halibut Reinhardtius hippoglossoides matsuurae and Kamchatka flounder Atheresths evermanni inhabiting the western Bering Sea and Pacific waters off the northern Kuril Islands and southeastern Kamchatka are examined. The diets of both predators consisted mostly of shrimps, cephalopods and fishes. The consumption of large amounts of fishery offal by Pacific black halibut and Kamchatka flounder in the western Bering Sea was noted. The diets of the species considered in both study areas are compared, and diet variations depending on fish size, capture depth, area and sex are analyzed.