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使用主成分分析、聚类分析、单因子方差分析和判别分析对采自黄渤海的100尾大头鳕的11个分节特征和24个量度特征进行形态学比较研究。判别分析结果显示三个群体判别正确率为79.2%~100%,其中青岛群体判别正确率为100%,综合判别正确率为88%;主成分分析结果显示前8个主成分解释了81.72%的形态差异,主成分分析散点图显示三个群体间存在较大差异;单因子方差分析结果显示三个群体间存在较多显著差异的形态指标,差异系数显示俚岛和大连群体与青岛群体间存在差异,表明俚岛和大连群体形态较为相近,与青岛群体存在一定差异。
Principal component analysis, cluster analysis, one-way analysis of variance and discriminant analysis were used to compare the morphological characteristics of 11 sectional and 24 measurement characters of 100-haired Hoi-hai. The result of discriminant analysis showed that the discriminant correct rates of the three groups were 79.2% ~ 100%, among which the discrimination accuracy of Qingdao population was 100% and the accuracy of comprehensive discrimination was 88%. The principal component analysis showed that the first eight principal components explained 81.72% The scatter diagram of principal component analysis shows that there is a big difference among the three groups. The result of one-way ANOVA shows that there are more significant morphological indexes among the three groups, and the coefficient of variation shows that there is a significant difference between the two groups There are differences, indicating that the island of Hong Kong and Dalian groups are relatively similar in form, there are some differences with the Qingdao group.