青海湖裸鲤体重和体长性状的剖分与相关回归分析

Dissection and Correlation Regression Analysis between the Weight and the Body Length Characters of Qinghai-lake Naked Carps

[目的]确定青海湖裸鲤体重和体长性状的剖分组成和相关关系。[方法]剖分和测定511条青海湖裸鲤(211♂,300♀)的体重和体长性状,应用SAS软件进行相关回归分析。[结果]雌雄混合群体和雌鱼群体中,体重(Y1)与头重(X1)、鳍重(X2)、躯尾重(X3)、肠容物重(X4)的相关系数极显著;雄鱼群体中,体重(Y1)与头重(X1)、躯尾重(X3)的相关系数极显著,与肠容物重(X4)的相关系数显著,与鳍重(X2)的相关系数不显著;其最优回归方程:雌雄混合群体Y1(♂♀)=-2.243 90+0.998 98X3+1.306 04X4;雄鱼群体Y1(♂)=8.976 41+1.203 10X3;雌鱼群体Y1(♀)=1.930 02+0.883 62X3+1.245 84X4。体长(Y2)与头长(X5)、躯干长(X6)、尾长(X7)的相关系数极显著和显著,其最优回归雄鱼方程:Y2(♂)=0.971 45+0.953 31X6;雌鱼方程:Y2(♀)=3.629 09+2.257 76X5+1.103 67X7。[结论]回归方程适用于体重、体长在一定范围的青海湖裸鲤性成熟亲鱼,其他近缘裸鲤也可借鉴。

[Objective] The research aimed to confirm the dissection composition and eorrelativity between the weight and the body length characters of Qinghai-lake naked carp. [ Method] The weight and the body length of 511 （211 ♂, 300♀ ） qinghai-lake naked carps were dissected and measured, and the correlation and regression analysis was made by SAS software. [ Result] There was extremely significant correlation between the weight（ Y1 ） and the head weight（X1）,the fin weight （X2）,the trunk-tail weight（X3）,the internal organs weight（X4） in the female-male population and the female population. There was extremely significant or significant correlation between the weight（ Y1 ） and the head weight（ X 1）, the trunk-tail weight（ X3）, the internal organs weight（ X4） in the male population,but there was no significant correlation between the weight（ Y1 ） and the fm weight（ X2 ）. The optimal regression equation of female-male population, male population and female population was Y1（♂♀）=-2.243 90＋0.998 98X3＋1.306 04X4;Y1（♂）=8.976 41＋1.203 10X3;and Y1（♀）=1.930 02＋0.883 62X3＋1.245 84X4 respectively. There was extremely significant or significant correlation between the body length（Y2） and the head length（X5）, the trunk length （ X6） and the tail length （ X7 ）. The optimal regression equation of male population and female population was Y2（♂）=0.971 45＋0.953 31X6;and Y2（♀）=3.629 09＋2.257 76X5＋1.103 67X7 respectively. [ Conclusion ] The regression equations on weight and body length characters are suitable for nature mature fish of qinghai-lake naked carps in certain scope, which can provide the reference for other naked carps.