高白鲑繁殖力的主成分分析

Principal Component Analysis on Coregonus peled′s Fecundity

本文为了综合评价高白鲑鱼繁殖力,应用主成分分析法对高白鲑的繁殖力进行了分析。分析结果表明：淤高白鲑绝对怀卵量为59 397.9依33 649.8e,相对范围为25 703.1-93 092.7e;相对怀卵量为32.52依15.13 e/g,相对范围为17.39-47.65 e/g。于第一主成分贡献率为84.328%,主成分的取舍合适,反映了6项指标的绝大部分信息。在第一主成分上,这6项指标都达到了比较大或者说很大的水平,这就说明这6项指标在判断繁殖力大小时所起的作用都很显著,榆主成分分析的散点图和排序图显示,10个高白鲑个体的繁殖能力分为3类：编号2、8、9的繁殖力较强,编号1、3、4、6的繁殖力较弱,编号5、7、10的繁殖力介于两者之间,且2号的繁殖力最强,3号的繁殖力最弱。本研究证实卵巢重与绝对怀卵量对高白鲑繁殖力的评价作用最大,体长与体重其次,成熟系数与相对怀卵量的作用最低。

Principal component analysis was used in this papor ,in order to comprehen-sive evaluation of Coregonus peled＇s fecundity.The results showed that ：（1） The absolute fecundity of Coregonus peled was 59 397.9 ±33 694.8e ,the relative fecundity was 32.52±15.13 e/g.（2）The contribution rate of the first principal component was 84.328%, the most part of information of the six indexes was reflected. （3）On the first principal component,the six indexes had reached a relatively large level ,which meant the six indicators in judging fertility were very important. （4）The individual fecundity of 10 Coregonus peled was divided into three categories ： number 2,8,9 was the first category of the highest fertility,Number 1,3,4,6 was the fecundity of the lowest of the third kind,the fecundity of Number 5,7,10 was in the middle on the scatter plot of the principal component analysis.This studies confirmed that the ovary weight and absolute amount had the biggest role in comprehensive evaluation of Coregonus peled＇s fertility ,weight and relative had second, body length and maturity coefficient was lowest.