几种生物饵料对海蜇幼蜇生长的影响

Influence of Several Natural Foods on Growth of Juvenile Medusa,Rhopilema esculenta Kishinouye

试验结果表明:在海蜇(RhopilemaesculentaKishinouye)养殖过程中,褶皱臂尾轮虫(Bra chionusplicatilis)、细巧华哲水氵蚤(Sinocalnustenellus)、近亲真宽水氵蚤(Eurytemoraaffinis)、蒙古裸腹水氵蚤(Moinamongolica)和卤虫(Artemia)无节幼体,均可作为幼蜇的饵料,在水温22～25℃,pH8 4～8 8,溶氧4～8mg/L,盐度30±0 5的条件下,培养22d幼蜇日生长率为1 2%～3 2%,成活率为100%。其生长率与试验饵料的种类关系不大,而与投喂密度有关。轮虫的合适密度为0 5×104～1 0×104/L。笔者还根据试验结果,以等生物量法,提出了投喂其它几种生物饵料的参考密度指标。以期为海蜇的人工养殖寻找更加广阔的饵料资源。

It was found that Brachionus plicatilis,Sinocalanus tenellus,Eurytemora affinis,Moina mongolica,and Artemia nauplii were used as a natural food for medusaThere were daily growth rate of 12%～32%and survival rate of 100%under water temperature of 22～25 ℃,salinity of 30±05,pH 84～88 and dissolved oxygen 40～80 mg/LIt is suggested that the optimal density of rotifer be 05×104～10×104/L