空釣出現の検討-I : 餌サンマの物理的強度の経時変化

概要

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Studies on the relationship between soaking time of bait used in the tuna long line fishery and the breaking power (physical intensity) on it. The results obtained are summarized as follows; 1. The weakening phase caused by the breaking power within 18 hours in the investigation in the sea could not be clearly determined. 2. In the laboratory, the progress of the weakening phase by the breaking power was very slow during the first 10 hours but it proceeded rapidly after 12 hours. 3. The breaking power (tearing saury bait from hook) was more than 840 g-w after 18 hours in the investigation in the sea and more than 640 g-w after 20 hours in the laboratory.
公益社団法人日本水産学会の論文