浙江近海海蜇增殖研究

1975年后浙江南部海蜇资源突然衰退,至今20年没有恢复迹象。采用人工放流增殖方法逐步恢复资源量。全人工育苗研究已经完成,并进入工厂化、规范化育苗阶段,保证了放流种苗的供应。同时,在浙江北部完成了海蜇放流可行性的研究。利用标志放流方法计算回捕率为0.88%,在123天中,平均日生长为0.33cm。1992年,又在浙江南部进行试放流,回捕率为1.29%。人工放流海蜇在自然海区能进行自然繁殖。

JELLYFISH ENHANCEMENT RESEARCH IN ZHEJIANG OFFSHORE AREA

Since the jellyfish colony in the south area along Zhejiang coastal line sharply declin- ed since 1975,its stock has not yet recovered.There is no other way to gradually recover it but artificial release.We have completed whole-artificial larviculture study and got into the stage of standard and large-scale production which meets the needs of releasing Seedlings.Meanwhile,we have fulfilled study on the jellyfish release feasibility in the north area.The rate of recapture reached 0.88% calculated on the basis of tag-meth- od.During the period of 123 days,the average growth rate is 0.33CM/day.The recap- ture rate of test-release in the south area in 1992 was 1.29%.Artificially-released jel- lyfish can breed in natural water area.