海蜇(Rhopilema esculenta)浮浪幼虫及早期螅状体摄食行为的研究

STUDY ON PREDATION BEHAVIORS OF PLANULA AND NEWLY METAMORPHOSED POLYP OF RHOPILEMA ESCULENTA

采用对比实验与显微观察的方法,对海蜇浮浪幼虫及早期螅状体的摄食行为进行了研究。结果表明,海蜇浮浪幼虫期不摄食外界食物;浮浪幼虫附着变态发育成海蜇螅状体1d后,开始摄食其它浮浪幼虫,螅状体发育到第3天摄食能力迅速增强,能够捕食卤虫无节幼体。海蜇早期螅状体的捕食实验结果表明,早期螅状体开始捕食主要受两方面影响,一方面是口的发育,另一方面是刺细胞的发育。

Predation behaviors of planula and newly metamorphosed polyp of Rhopilema esculenta were studied by comparative experiments and microscopic observation. Planula did not ingest before metamorphosis into a polyp. The polyp could prey on planula one day after metamorphosis, predation ability quickly increase after three days, and could feed on Artemia nauplii. On the basis of the study on polyp predation behavior, we found that the development of mouth and cnidoblast were two key factors influence the feeding behavior ofplanula and newly polyp ofR. esculenta.