银鲈胚胎和仔鱼的发育

Observation on embryonic and larval development of Bidyanus bidyanus

本文对银鲈 (Bidyanusbidyanus)胚胎和仔鱼的发育进行了观察 ,详细描述了发育各期的形态特征和所需时间。受精卵充分吸水后呈圆形 ,为浮性卵 ,在 2 3～ 2 5℃时 ,孵化时间约为 32h。仔鱼出膜后第 3天卵黄囊消失 ,第 5天开始摄食 ,到第

The fertilized eggs of Bidyanus bidyanus are round and floating.The embryo had been hatched for about 32 h before hatched out with water temperature 23～25℃.Yolk sac in the larvae disappeared at day 3 after hatching.The larvae can feed at day 5 after hatching and developed completely at day 7.