黄金鲈与伊犁鲈杂交后代生长性能及杂交鲈性腺发育分析

研究了黄金鲈(Perca flavescens)雌鱼与伊犁鲈(Perca schrenki)雄鱼杂交后代的生长性能和性腺发育。结果显示:经过690 d的生长比较,杂交鲈体重为(446.94±32.14)g,黄金鲈体重为(314.16±31.20)g,伊犁鲈体重为(446.94±32.14)g;杂交鲈体重增长比黄金鲈快33.91%,二者体重有显著差异(P<0.05);杂交鲈体重增长比伊犁鲈低6.24%,杂交鲈与伊犁鲈体重无显著差异。二龄杂交鲈雌、雄性腺系数分别为(10.05±0.05)%和(1.64±0.01)%,显著低于黄金鲈雌、雄性腺系数(13.67±0.05)%和(3.60±0.01)%(P<0.05)。黄金鲈和伊犁鲈的杂交鲈繁殖期比黄金鲈推迟一年。

Analysis of growth and gonadal development in hybrids between Perca flavescensand Perca schrenki

This research based on the hybrid experiment conducted with Perca flavescens (yellow perch) spawner and Per-ca schrenki (balkhash perch) milter (a kind of perch native to the Central Asia region) for the first time, with a view of speeding up the growth rate of P. flavescens, postponing sexual maturity and improving the listing specifications. The result showed that, the weight of hybrid perch was (446.94±32.14)g, P.flavescens was (314.16±31.20)g and P. schrenki was (446.94±32.14)g. The body weight of hybrids were gained 33.91% faster than P. flavescens, there was significant difference between the hybreds and P. flavescens (P<0.05 ), but significant difference between the hybreds and P. schrenki. Gonadosomatic index of male and female hybrids were respectively (10.05±0.05)% and (1.64±0.01) % , which were significantly lower than the P. flavescens (13.67±0.05)% and (3.60±0.01)% (P<0.05 ). Through hybridization, the breeding of hybrids was delayed one year.