水中カメラによるサクラエビ集群密度と分布層の観察の試み
1974 年 30 巻 2 号 p. 86-89
詳細
1974 年 30 巻 2 号 p. 86-89
Some behavior of Sergestes lucens by day was observed by underwater camera with an electronic flash. A number of species was snapped at about 2-60m above the steep. continental slope where the bottom ranged between 341 and 437 m depths. They were often, abundant from 3-4 to 10m above the bottom. It suggests that the shrimps scatter widely along the continental slope by day. The maximum concentration of the shrimp was 1.2 individuals/m3. None of the shrimps was found on the bottom, and the majority were swimming in horizontal position.
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