浙江近海海域海蜇的增殖放流

Jellyfish,Rhopilema esculenta kishinouye,Enhancement Research in the Coastal Waters of Zhejiang

1975年后浙江南部海域海蜇资源衰败,至今20多年没有恢复。在完成海蜇全人工工厂化育苗研究后,1986年起开始在北部海域的象山港、杭州湾进行放流试验研究,1986～1989年共放流5mm左右的海蜇苗12529.45×104,回捕率0.1%～0.88%。在此基础上,1992～1994年又在浙江南部海域放流伞径3～5mm的海蜇苗17533万只。回捕率0.57%～2.33%。在停止放流后的1995、1996年于浙南海域捕获海蜇61×104多只,产生了较好的经济效益。

Since the jellyfish colony in the south coastal waters of Zhejiang sharply declined since 1975, its stock has not yet recovered. After having completed whole-artificial larviculture study and geting into the stage of large-scale production,test-releasing for enhancement had carried out since 1986.During 1986-1989,12 529.45×104 ephyrae of jellyfish(Rhopilema esculenta,umbrella diameter about 5 mm) were released into the Xiangshan harbor and the Hangzhou bay of the north waters of Zhejiang,the recapture rates were 0.1 %～0.88 %.On the base of it,during 1992-1994,17 533×104.ephyrae of jellyfish(3～5 mm) were released into the south waters of Zhejiang,the recapture rates were 0.57 %～2.33 %.After stoping releasing,61×104 medusea were captured in the south waters in 1995 and 1996.The results of the experiments indicated that the releasing for enhancement of jellyfish has achived a better economic benefits.