3个淇河鲫群体的形态差异与判别分析

研究淇河林县段、淇县段和新乡市3个养殖群体淇河鲫的形态差异.对各群体淇河鲫的16项变量进行测量,运用单因素方差分析和多元判别分析方法对各变量进行研究.数据统计分析采用SPSS 23.0.结果显示:体长/全长、体高/全长、头长/全长、眼径/全长、尾柄长/全长和背鳍基长/全长在群体间的差异有统计学意义(P0.05).逐步判别分析提取体高/全长、尾柄长/全长和背鳍基长/全长共3项变量建立2个判别函数,对判别函数的检验使用回代检验和交互检验,判别率分别为100%和97.5%.表明淇河鲫3个养殖群体在形态上存在一定程度的差异.不同群体淇河鲫的归属可以通过某些形态性状进行判定.

Morphological Variation and Discriminant Analysis among Three Geographical Populations of Qihe River Carassius auratus

The morphological variation about three populations of Qihe river C.auratus collected from Qixian,Linxian and Xinxiang were studied in the present research.For morphological characters of each population,sixteen variables were measured and analyzed by one-way analysis of varianceand discriminant analysis.All the data were computed with SPSS for version 20.0.The result revealed that there were significant difference in six proportional characters(body length/total length,body height/total length,head length/total length,interorbital distance/total length,caudal peduncle length/total length,base length of dorsal fin/total length)among the three populations of Qihe river C.auratus.Three notable variates like body height/total length,caudal peduncle length/total length and base length of dorsal fin/total length were constructed by the analysis of discriminant functions to establish two discriminant functions.The original sample test and cross-validation test were used to examine these functions,with the total classification accuracy of 100% and 97.5%,respectively.The results showed that therewere several differences about morphological of the three populations of Qihe river C.auratustosome extent.The orgin of different Qihe river C.auratuscan be confirmed by some characters of morphological.