Reproductive Cycle of Cultured Seeds of the Sea Urchin, Strongylocentrotus intermedius Produced from Geographically Separated Population.
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概要
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The cultured seeds of the sea urchin, <I>Strongylocentrotus intermedius</I> produced from adult sea urchins in Sea of Japan and Pacific Ocean were released off the coast of Toi, eastern Tsugaru Strait, and off the coast of Yoichi, western Sea of Japan, Hokkaido, respectively. Their reproductive cycles were examined in the present study.<BR>The seeds which had been released in Toi spawned in September to November same as the native population in Sea of Japan but their those gonads did not develop so well as those of native population during fishing season (January to March) . The seeds which had been released in Yoichi spawned in August. Consequently, it was concluded that release of the seeds from adult sea urchins that those habitats were geographically separated was unreasonable.
- 日本水産増殖学会の論文
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