红鳍东方鲀幼鱼相互残食的因子研究

为了有效预防红鳍东方鲀(Takifugu rubriges)鱼互相残食现象，提高育苗成活率。本研究以红鳍东方鲀为实验对象，于2011年4-7月期间，选取全长9.8~24.9 mm的红鳍东方鲀进行试验观察。研究了密度、浑浊度、饥饿、投喂状态、规格对每种鱼苗相互残食的影响程度。试验结果表明：全长9.8~24.9 mm的红鳍东方鲀幼鱼相互残食现象很激烈，死亡主要是由头先型相互残食引起的。投喂状态、个体大小差异、放养密度、饥饿对红鳍东方鲀幼鱼的相互残食行为影响极显著，投喂不充分是导致红鳍东方鲀幼鱼发生相互残食的主要原因，当密度为4尾/L时，投喂不充分，相互残食死亡率最高为58%。

The Factors Affecting Cannibalism in Takiugu Rubriges Young Fish

The cannibalistic behavior was serious in Takiugu Rubriges young fish.Seedling survival rate was decreased,taking effective measures to prevent cannibalistic behavior of Takifugu rubriges.From April to July of 2011,laboratory experiments were conducted with T.rubriges young fishes（total length 9.8-24.9 mm） in different treatments,the factors including the stocking density,the turbidity of water,hungry,feeding method,body sizes.The results showed that,T.rubriges young fishes（total length 9.8-24.9 mm） bited from head and swallowed the prey basidly.The cannibalistic behavior of the young fish became furious.The differences in body sizes,feeding method,hungry,the stocking density had influence on the cannibal behavior of the young fishes.It was suggested that insufficient diet was a main reason causing the cannibalism among T.rubriges young fishes,and at the time of the high stocking density,the rate of cannibalistic death was 58%.