中国鲎幼鲎人工养殖饵料初步研究

A preliminary study on fish bait of juvenile Chinese horseshoe crab under artificial culture

选用沙蚕、菲律宾蛤仔肉、明虾肉、明虾肉海带混合、海带和初孵卤虫6组饵料投喂2龄期中国鲎幼鲎。试验结果表明:投喂初孵卤虫组2龄期幼鲎存活率最高,为71.43%,其他投喂组存活率不足20%;投喂初孵卤虫组的35只2龄幼鲎有12只蜕壳发育成3龄期幼鲎,其他投喂组均未出现蜕壳;投喂初孵卤虫组幼鲎湿重和头胸部宽增加明显,其他投喂组湿重与初始湿重相比略有增加,但头胸部宽无明显变化。说明初孵卤虫是2龄期幼鲎人工养殖的适宜饵料。

In this study,nereis,Philippine clam meat,prawn meat,mixture of prawn meat and kelp,kelp and Artermia neonate were used as fish baits to feed second-instar juvenile Chinese horseshoe crab.The results showed that the survival rate was highest,showing 71.43% when fed by Artermia neonate while the survival rates of other treatments were less than 20%.Twelve second-instar juvenile Chinese horseshoe crabs moult and grown into third-instar ones when fed by Artermia neonate,no moult occurred in other treatments; and wet weight and cephalothorax width became increased significantly when Artermia neonate was fed.Wet weight increased slightly and cephalothorax width showed no significant change in other treatments.Therefore,Artermia neonate could be a suitable fish bait for second-instar juvenile Chinese horseshoe crab.