浮魚礁の水理機構と生物生産

概要

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This paper considers why fish would gather in fish aggregating devices from the viewpoint of hydraulics. The data such as the feature seen from the environment of the area of the sea where the fish aggregating devices is set up, the range of fish which gather in the floating artificial reef, and the observation record of the movement of the fish aggregating device set up was collected. The interesting fact is that fish gather in the upstream side of the artificial reef. Also the size of the wake volume which develops by the floating artificial reef was simulated using the author's model on the wake. The result can not explain about fish which gather in the upstream side but fish gather in the wake. Therefore, seen from the point of the view of the occurrence of the mountain wave, the effect on mixing of the water mass by the occurrence of the mountain wave was guessed in the area of the sea where the artificial reef is set up. And it was supposed that it contributes the selection of the area of the sea where the fish aggregating device is set up and the effect of the gathering.
2013-07-15