不同驯化方式对细鳞鱼仔稚鱼生长和存活的影响

目的]进一步丰富细鳞鱼养殖生物学内容,为其规模化养殖提供基础.方法]在水温9.2 ～15.2℃水温条件下,采用3种不同的驯化方式驯养体重（0.055±0.003）g的细鳞鱼鱼苗60d,研究不同开口饵料和驯化方法对细鳞鱼仔、稚鱼生长和存活的影响,确定最适开口饵料和最优驯化方案.结果]经过60d投喂,C组细鳞鱼体重的特定生长率为5.21％/d,明显大于A组和B组;A、B、C组细鳞鱼的死亡率分别为32.37％、32.27％和37.47％,差异不显著（P＞0.05）;A、B、C组细鳞鱼体重的变异系数分别为16.8％、20.3％和12.9％.结论]水蚤是细鳞鱼较为理想的开口饵料,但在细鳞鱼规模化养殖中以粉料开口,采用粉料和颗粒饲料投喂（C组）是更为合理的驯化方式.

Effects of Different Cultivation Methods on the Growth and Survival of Larval and Juvenile Brachymystax lenok

Objective] The research aimed to further enrich the biological knowledge of Brachymystax lenok aquaculture and provide foundation for its large-scale cultivation.Method] At water temperature of 9.2-15.2 ℃,Brachymystax lenok seedlings with the body weight of （0.055 ± 0.003）were cultivated for 60 days by three different cultivation methods.The effects of different mouth-open feed and cultivation methods on the growth and survival of larval and juvenile B.lenok were studied to confirm the optimum mounth-open feed and the best cultivation method.Result] After 60 days,the specific growth ratio of body weight of B.lenok in C group was 5.21％/d,which was obvious higher than that in A group and B group.The mortality rates of B.lenok in A group,B group and C group were 32.37％,32.27％ and 37.47％ respectively,without significant difference （P ＞ 0.05）.The coefficients of variation of body weight of B.lenok in A group,B group and C group were 16.8 ％,20.3 ％ and 12.9％ respectively.Conclusion] Daphnia was a kind of good mouth-open feeding,and the reasonable cultivation method of B.lenok in large-scale cultivation was feeding with powder feed and granule feed（C group）.