マグロ延縄漁業における深縄による漁獲について

概要

論文の詳細を見る
The annual decrease in the quantity of tuna fished from the upper layers of the sea initiated the exploitation of tuna in the deep layer of the sea. In recent years, the catch of bigeye tuna has shown a tendency to increase with the use of the deep layer tuna long line. This paper dealt with the use of the deep layer tuna long line. This paper dealt with the special features of the catch of tuna by deep layer tuna long line fishing The results are as follows 1. As the depth of hook increased, fishing efficiency also increased. 2. The construction of long line needs to be changed according to the vertical distribution of water temperature of fishing ground. 3. It is considered that dissolved oxygen controls the distribution of bigeye tuna. However, it is not the only factor that controls distribution.
日本水産學會の論文