延縄の漁獲からみたインド洋のメバチの分布

概要

論文の詳細を見る
Distribution of bigeye tuna Thunnus obesus in the Indian Ocean was discussed by using the catch-and-effort data of Japanese tuna longline fishery from 1967 to 1985. According to the average numbers of catches in individual 5-degree squares in the Indian Ocean, the catch distribution was recognized in a wide area between Lat. 25°N and 40°S. The higher catch tended to be observed in the western and eastern tropical regions and in the southern higher latitude regions. The areas with low catches were observed in the mid-latitude area between the tropical region and the north high latitude region, the Arabian Sea, north of Bengal Bay, and in the high latitude areas extending from east to west between Lat. 35°S and 50°S. These results were similar to the catch distribution patterns of bigeye tuna caught by longline fishery obtained in the Pacific and Atlantic Oceans, with some minor differences in the longitudinal direction.
日本水産學會の論文