人工魚礁に対する魚群行動の実験的研究-7-模型魚礁の大きさと魚群反応

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概要

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• Using stone bream, Oplegnathus fasciatus(T. et S.), striped pigfish, Parapristipoma trilineatum(THUNBERG), common sea bass, Luteolabrax japonicus (CUVER), leather fish, Stepthanolepis cirrhifer (T. et S.), gray rock cod, Sebastes inermis (CUVER) and so on, experiments were carried out in an outdoor water tank (L. 8×W. 6×D. 1.5m) with pooled water, in order to obtain the foundamental knowledges about the influences of various dimensions of fish reefs, both horizontally and vertically, to the reaction of fish schools. 1) Stone bream, striped pigfish and common sea bass were attracted samely to the various distances between model fish reefs, both horizontally and vertically. In other words, two seemingly different factors, the one being the increase of height and the other the increase of horizontal area, have the same values of stimulus to the mentioned species of fishes. 2) Seigo, the young of common sea bass, was more attracted to the increase of height than that of area of model fish reefs. 3) Leather fish was more attracted to the increase of horizontal area than that of height of model fish reefs. 4) Stone bream was attracted samely to the blocks, even if the blocks were set in a distance one to one and half the heights of the blocks. While, striped pigfish was obviously less attracted to the blocks, when they were set in a distance more than same to the heights of the blocks. 5) Gray rock cod was hardly attracted to the model fish reefs used in the present report. It was rather attracted to the shadow of the water tank.

• 社団法人 日本水産学会の論文

著者

• 小川 良徳

  東海区水産研究所

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• 人工魚礁に対する魚群行動の実験的研究-7-模型魚礁の大きさと魚群反応
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