ウニの逃避防止用エアポッケトフェンスの効果について
1999 年 36 巻 1 号 p. 71-74
詳細
1999 年 36 巻 1 号 p. 71-74
It is demanded to develop the durable and reasonable fence to obstacle the movement of sea urchins, because of releasing intensively and breeding sea urchins in calm sea area In present study, we made an experiment to develop the fence which can obstruct those escaping effectively, and investigate the efficiency of the fence which has the air-pocket. It was found that sea urchins did not wholly expose themselves in the air, and also they did not expose their tube feet which can cling substrates. Both northem sea urchins and shortspined sea urchins twenty-five were put in the air-pocket fence, and stood for 72 hours. As the experiment result, there was no sea urchin escaping over the air-pocket fence at all.
