ゴマサバの視覚とその釣漁法への応用に関する基礎的研究-6-釣獲時系列より推測される集魚灯下の魚群運動

概要

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Movement of the spotted mackerel attracted to the fish lamp was estimated from the time series of catch. The time series was analysed by the use of the Fourie transfer method, the autoregressive fitting model, and the De LURY's method. Each result of the calculation shows that the number of catch per unit time-interval fluctuates including short term periodic components. Though there is a possibility of a change of the school or the recruitment of a new school to an old one, the main reason of the periodic fluctuation is attributed to the movement of fish school. Hence, it is concluded that the spotted mackerel attracted actively moves in the area heneath the fish lamp and its surroundings, so the retinal light adaptation of fish attracted to the fish lamp does not change in spite of the extreme high underwater brightness beneath the fish lamp.
日本水産學會の論文