三种淡水幼鱼对带电网片的反应

The Reaction of 3 Kinds of Fresh Water Young Fishs to Electric Net Piece

初步研究了鲢、鳙和草鱼三种幼鱼对带电网片的反应．结果表明，在带电网片作用下，三种幼鱼的活动性明显增强，集群性显著减弱，在水槽内的分布重心均有移向网片附近的倾向，带电网片对鱼的视觉诱引力和普通网片基本相同，但对鱼的触觉诱引力因电场的驱赶作用而消失．带电网片对鱼有明显的阻拦作用，其作用大小与鱼的种类有关．

the response of 3 kinds of fresh water young fish to electric net piece isstudies. The result shows:affected by electric net piece,the activity of 3 kinds of young fishobviously increases, their gathering ability obviosly decreases. The center of distribution intank tends to move near to the net piece. Visual attraction of electric net piece is the same asthat of the common net. But the tacticle attraction to fish disappears due to the driving func-tion of electric field. The electric net piece has obvious obstractive effect on fish. But the de-gree of the effect varies with different kinds of fish. This study throws some light on the de-sign of electric bars to block fish.