著者

伊藤 史郎 小早川 淳 谷 雄策

出版者

Japanese Society for Aquaculture Science

雑誌

水産増殖 (ISSN:03714217)

巻号頁・発行日

vol.34, no.4, pp.257-259, 1987-03-31 (Released:2010-09-07)

参考文献数

7

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1) 1986年3月から5月の間, アオナマコ浮遊幼生の飼育適水温を知るため, 13~22℃間における1℃ごとの飼育実験を行った。2) Doliolaria幼生の出現は13~20℃間では水温が高いほど早いが, 22℃は20℃と同じであった。3) 浮遊幼生の適温下限は15℃付近だと考えられる。4) 少なくともAuricularia幼生の適温上限は19℃と考えられるが, Doliolaria以降の幼生の適温上限については明確でない。

著者

伊藤 史郎 柴山 雅洋 小早川 淳 谷 雄策

出版者

公益社団法人 日本水産学会

雑誌

日本水産学会誌 (ISSN:00215392)

巻号頁・発行日

vol.55, no.5, pp.757-763, 1989-05-25 (Released:2008-02-29)

参考文献数

10

被引用文献数

4 23

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The spawning season of the sea urchin Hemicentrotus pulcherrimus in natural ground, Saga area in Japan starts from around December. In mass production of young sea urchin, the warmer season is then more desirable for the larvae culture. In order to collect the eggs three months earlier than natural spawning season, promotion of maturation and of spawning was conducted by regulating water temperature. The sea urchin which had experienced a period of rising temperature to 26°C, either naturally or artificially, could mature and spawn about 45 days after the temperature was again lowered to 15°C. Those cultured at constant temperature of 15°C from May did not mature and died in July. These experiments suggest that by means of the water temperature regulations, mass production of sea urchin can be commenced from October in the warmer season, the optimum period for culturing larvae. Using this method, the mass production of the sea urchin has been successfully conducted in our station since 1987.