スケソウ漁業中の以東底曳船の作業時間-V. : 風浪と作業時間の関係

概要

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Among many of the oceanographic and meteorological factors, the wind wave was chosen; and the difference of its influence on the working time of the Danish seiners according to the steps of works, was examined. The results obtained are summarized as follows: 1. The hauling-brail.ing step was the least resistive against the wind wave. And the maximum difference of the average times among the grades reached as large as 20% of the time expended on this step, because the net in surface layer was handled at the working pace of the fishermen. 2. The laying step succeeded to this, the retardation being 7%, because this step of work progressed at the working pace of the boat. 3. The sinking-pulling step was the most resistive and received scarcely any influence (45 seconds or 3%). 4. The fishable limit of wind wave was the grade 7; and the influence of wind wave was far larger than that impressed from the retardation of the work and the elongation of the intervals, because much hours were expended to wait the recovery of the sea condition on the days of the grade 7 but they were not counted in the intervals.
公益社団法人日本水産学会の論文