对3个不同群体江鳕矢耳石的形态指标进行统计分析,结果表明江鳕左、右矢耳石的9个测量指标均无显著性差异;单因子方差分析表明3个群体间均有显著性差异的形态指标;逐步判别分析以3个形态指标建立的判别方程,其判别成功率达97.3%,典型判别函数散点图显示3个群体明显分离;主成分分析得出前3个主成分的贡献率分别49.552%、25.679%和12.734%,累积贡献率为87.965%;聚类分析将多布库尔河和布尔津河的江鳕聚为一支,与判别分析的结果一致。因此,耳石形态指标可以作为江鳕群体鉴别的有效工具。 The statistical analysis of morphological indexes of otoliths in three different groups showed that there were no significant differences among the nine measurements of otoliths in left and right otoliths. One-way ANOVA showed that there were significant differences between the three groups Sex discriminant morphological indicators; discriminant analysis of three morphological indicators to establish the discriminant equation, the discriminant success rate of 97.3%, the typical discriminant function scatter diagram showed three groups were significantly separated; principal component analysis obtained the first three principal components The contribution rates were 49.552%, 25.679% and 12.734%, respectively, with a cumulative contribution rate of 87.965%. Clustering analysis clustered together the Dracaena diversifolia and the Burqin river, which was consistent with the results of discriminant analysis. Therefore, otolith morphological indicators can be used as an effective tool for identification of cod population.