几种杂交鲤的形态学特征及主要经济性状

Morphological and Main Economic Characteristicsof Several Common Carp(Cyprinuscarpio L.) Hybrids

杂交鲤1^#（高寒鲤♀×建鲤♂）、2^#（高寒鲤♂×建鲤♀）体色为青灰色,全鳞,纺锤形,杂交鲤3^#（高寒鲤♀×镜鲤♂）、4^#（高寒鲤♂×镜鲤♀）为纺锤形,一部分青灰色,全鳞,另一部分为淡黄色,散鳞。二龄鱼的体长/体高为2.28-2.80,体长/头长为3.40-3.75,尾柄长/尾柄高为1.02-1.22,空壳质量/体质量的指数为89.6%-91.5%。杂交鲤3#、4#生长快,群体产量比建鲤高11.3%-61.2%。几种杂交鲤抗寒力均较强,自然越冬成活率一、二龄鱼均超过95%,是适合北方地区养殖的优良鲤鱼杂交种。

The Hybrid No. 1 （ Cold tolerant common carp ♀ × Cyprinus carpio Var. jian ♂ ） and Hybrid No. 2 （ Cold tolerant common carp ♂ × Cyprinus carpio Var. jian ♀ ） were characterized by blue - grey in colour, whole scales and fusiform in body form. The Hybrid No. 3 （ Cold tolerant common carp ♀ × Cyprinus carpio L. mirror ♂ ） and hybrid No. 4（ Cold tolerant common carp ♂ x Cyprinus carpio L. mirror ♀ ） had blue - grey to light yellowish body colour, and whole scales or scattered scales. The 2 - year old hybrids had a body length/body height ratio of 2.28 - 2.80, body length/head length of 3.40 - 3.75, caudal peduncle length/caudal peduncle height of 1.02 - 1.22, and the dressed/body weight of 89.6% -91.5%. There were better growth and 11.3% -61.2% higher yields in Hybrid No. 3 and Hybrid No. 4 than those in Cyprlnus carpio Var. jian. The 1 -2 year old hybrids had high cold - resistance with over 95% survival rate during wintering in ponds.