The hatching rate was 75% and the length of fries just laid from membrane was 3.93mm compared with that of the beginning,being 7.83mm. After 8 days of cultivation in pond,the length was up to 34.08mm and the surviving rate was 50%.

• 出膜仔鱼体长 3 93mm ,7 83mm下塘 ,池塘培育 8天达到 34 0 8mm ,培育成活率 5 0%25。