原著論文
宗谷海峡のミズダコ樽流し漁業における漁具の漂流速度と漁獲量の関係
2012 年 76 巻 3 号 p. 123-130
詳細
2012 年 76 巻 3 号 p. 123-130
The relationship between catch and the speed at which the drift fishery gear used to capture the giant pacific octopus, Enteroctopus dofleini, was examined in the Soya/La Pérouse Strait. Latitude, longitude, time and catch data from 15 fishing boats were collected from April to December 2007 to calculate the number of dirft fsihery grounds visited, time spent for drifting, area covered, drift speed of the equipment, and the catch in each fishing ground. Catch was influenced by time spent for drifting and not by drift speed. The catch was greatest when time spent for drifting was over 2.03 h and drift speed was between 5 and 50 cm・s-1. It is likely that the fishermen practically choose the time when the current speed is appropriate to operate the drift fishery gear in the Soya/La Pérouse Strait, where the current speed varies between 0 and ca. 100 cm・s-1.
