不同的转食饵料对圆口铜鱼幼苗生长及存活的影响分析

Effects of different dietson the growth and survival rate in the fries of Coreiusguichenoti

采用丰年虫、水蚯蚓、微囊饲料3种饵料的不同配合策略,对圆口铜鱼仔稚鱼投喂60 d,以研究对其生长和存活率的影响。结果显示,30日龄后投喂水蚯蚓的成活率、全长、体长、体质量均高于其他组,特定生长率为4.44%±0.30%/d,显著高于对照组和W15微囊饲料组。15日龄后转投微囊饲料组的全长、体长、体质量和特定生长率最低。结果表明不同的转食策略对圆口铜鱼仔稚鱼的生长及存活有显著的影响,30日龄后投喂水蚯蚓能有效的提高存活率及生长速度。

The C.guichenoti larvae were raised with fairy shrimp、limnodrilus and particulate feed bait feed for 60 days to study the effects of the three different feeding method on the growth rate and survival rate.It was found that the larvae fed with limnodrilus had higher survival rate、total length、body length、weight than other groups after 30 days post hatching(dph),and the specific growth rate was 4.44±0.30%/d.The total length、body length、weight and specific growth rate were the lowest of the particulate feed group after 15 dph.The results indicated that different feeding method had a significant effect on the growth and survival of the larvae.Feeding the fairy shrimp before 30 dph and feeding the limnodrilus after 30 dph could effectively improve the survival rate and growth rate.