人工魚礁近傍の魚群生態に関する予備的研究--猿島北方魚礁群の概要

概要

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To determine the ecology and the gathering factor of fishes near artificial reefs by using diving technique effectively, a series of direct observation studies was carried out north of Sarushima Island near Yokosuka. As the results, some fundamental phenomena were observed, such as setting configuration of artificial reefs, current, settled animals, benthoses and gathering fishes. Artificial reefs were laid down at a depth of between 15 and 25m in a range of 80×50m, separated into three groups. One of them was a sunken ship reef (wooden ship about 100 ton) and the others were concrete block reefs located in the direction of the bow and the starboard side of the ship. Although these artificial reefs were laid down for about 10 years, they seemed to maintain their original form. Fifteen kinds of fish were found near the artificial reefs, and they were mostly rock fish or settled-tyge fish. Sebastes inermis, "Mebaru"in Japanese, was superior here and more often observed near the sunken ship reef than near the concrete block reefs.
日本水産學會の論文