| 摘要: |
| 测量了代表刀鲚种群和湖鲚种群形态特征的传统可量性状和框架参数,采用主成分分析法和逐步判别法,对它们进行形态综合分析.结果表明:两种群的形态差异主要是受额部有鳞部最前缘到背鳍起点的距离所影响的;所有25个形态参数数据判别分析,表明两种群形态差异极显著(P<0.01),判别准确率100%;利用挑选后的9项参数判别分析,表明两种群的形态差异极显著(P<0.01),判别准确率P1是95%-100%,P2是95.2%-100%,综合判别率为97.5%.对各形态参数进行单因子方差分析,计算各参数的差异系数,根据Mayr提出的75%规则,认为它们的形态差异仍然是种内不同地理种群的差异,还没有上升到亚种水平. |
| 关键词: 刀鲚(coilia ectenes) 湖鲚(coilia ectenes) 判别分析 主成分分析 框架分析 多元分析 |
| DOI：10.18307/2004.0411 |
| 分类号: |
| 基金项目: |
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| Morphological Variations and Discriminant Analysis of Two Populations of Coilia ectenes |
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CHENG Qiqun1,2, HAN Jindi1
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1.Key Laboratory of Marine and Eslanne Fisheries, Ministry of Agriculture. East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, P. R. China;2.Institute of Genetics, Fudan University, Shanghai 200433, P. R. China
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| Abstract: |
| Traditional morphological data and truss network data were combined to conduct principal component analysis and stepwise discriminant analysis to study the morphological variations between two populations of Coilia ectenes.The results are showed as follows: morphological variations between these two populations were mainly caused by the distance from most anterior of scales on skull to origin of dorsal fin;discriminant analysis with 25 morphological parameters indicated that there were extremely significant differences between the two populations of Coilia ectenes (P <0.01), the accura-cy is 100%;disrriminant analysis with selected 9 morphological parameters showed that there were extremely significant differences between the two populations of Coilia ectenes (P<0.01), the identification accuracy are 95%-100% (Pl)and 95.2%-100% (P2) respectively, and the synthetic identification accuracy is 97.5%;ANOVA analysis was conducted on the morphological parameters of Coilia ectenes and the coeffieientH of difference of these parameters were also calculated.According to Mayr1 s 75% Rule, this paper reveals that the difference between the two populations of Coilia ectenes belongs to population level, and has not risen to the subspecies level. |
| Key words: Coilia ectenes lake anchovy (coilia ectenes) Discriminant analysis Prinripal Capital Analysis Truss analysis Multivariation analysis |
