论文部分内容阅读
为了解不同体色瓯江彩鲤(Cyprinus carpiovar.color)的繁殖性能差异,对5种体色类型(全红、大花、麻花、粉玉和粉花)瓯江彩鲤在2、3龄阶段的繁殖性能进行了研究。结果表明:3龄雌鱼的绝对繁殖力平均为34.55万粒,比2龄雌鱼的20.09万粒高71.98%;3龄雌鱼的体重相对繁殖力为216.76粒/g,比2龄雌鱼的187.26粒/g高15.75%,3龄雌鱼的繁殖性能极显著地高于2龄雌鱼(P<0.01);而5种不同体色瓯江彩鲤的性腺指数、绝对繁殖力和相对繁殖力均不存在显著差异(P>0.05);瓯江彩鲤的绝对繁殖力与体重呈直线关系:Y=0.0225X-2.5591(R=0.835 5,P<0.01);绝对繁殖力与体长呈幂函数关系:Y=0.0068X2.8002(R=0.728 5,P<0.01)。3龄雄鱼的性腺重极显著地高于2龄雄鱼(P<0.01),但2龄与3龄雄鱼间的性腺指数不存在显著差异(P>0.05),不同体色雄鱼间的平均性腺指数也不存在显著差异(P>0.05)。综合分析认为:瓯江彩鲤的最佳繁殖年龄,雌性以3～4龄为宜,雄性以2～3龄为宜。
In order to understand the difference of reproductive performance of Cyprinus carpiovar.color in different body color, reproductive performance of Oujiang color common carp in 2nd, 3rd instar of five body color types (All Red, Big Flower, Twist, Fengyu and Fenhua) Were studied. The results showed that the average fecundity of the 3rd females was 345,500, which was 71.98% higher than that of the 2-year-old females. The relative fecundity of the 3rd females was 216.76 grains / g, (P <0.01). The gonadotrophic index, absolute fecundity and relative fecundity of five color body Oujiang Caulis were significantly higher than those of the second instar female (P <0.01) (P> 0.05). There was a linear relationship between absolute fecundity and body weight of Oujiang color common carp: Y = 0.0225X-2.5591 (R = 0.835 5, P <0.01) : Y = 0.0068X2.8002 (R = 0.728 5, P <0.01). The gonad weight of the third instar male was significantly higher than that of the second instar male (P <0.01), but there was no significant difference in the gonad index between the second instar and third instar male (P> 0.05) The average gonadal index also showed no significant difference (P> 0.05). Comprehensive analysis shows that: Oujiang Cai best reproductive age, female to 3 to 4 age is appropriate, male to 2 to 3 age is appropriate.