網口の高さとグランドロープの方向とを自記することによる二艘曳機船底曳網の研究
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概要
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Both the records of the height of net-entrance and the direction of ground rope against its moving course were treated with reference to the fishing reports and the following two informations were given: (1) The net thrown overboard goes down to the bottom, 51-61m deep, in 3-3.5min. (Table 1 and 5) (2) Reduction of the wing-spread of net is more remarkable in parellel towing of 2-6.5min than in approaching each other of 8.5-13min. (Table 3, 4 and Fig 6)
- 公益社団法人 日本水産学会の論文