青岛和舟山褐牙鲆群体形态差异分析

Analysis of morphological variations between two geographical populations of Paralichthys olivaceus from Qingdao and Zhoushan

通过传统形态学测定和框架测定相结合,用方差、判别和主成分等分析方法,分析了青岛和舟山褐牙鲆两地理群体的形态差异。5个可数性状的分析结果表明,青岛牙鲆背鳍和臀鳍鳍条数目分别比舟山牙鲆的多10.75根和8.4根,二者差异极显著(P<0.01)。69个可量和框架数据的分析结果表明,其中有43个差异极显著,比例为62.32%;通过主成分分析表明,主成分1总方差贡献率为34.397%,包括了37个性状,其中的23个性状集中在吻端至臀鳍末端之间,对两群体的综合判别准确率为100%。青岛和舟山褐牙鲆两地理群体外部形态上存在显著性的差异,且可以用可数、可量和框架数据相结合来判别归属。

Traditional morphological data and truss network data were combined to conduct a multivariation analysis to study the morphological variation of two geographical populations of Paralichthys olivaceus from Qingdao and Zhoushan. Analysis of five meristic characters indicated that the numbers of dorsal fin rays and anal fin rays of Paralichthys olivaceus from Qingdao more 10.75 and 8.4 were than those of Zhoushan respectively, and the difference was very significant （P 〈 0.01 ）. The results of cluster analysis of 69 metric characters plus truss network data showed the difference of 43 of them were very significant, and the component 1 was 34. 394% , which included 37 characters, 23 of them came from tip of snout to terminus of anal fin. The discriminant rate of synthesis of two populations were 100%. There was significant difference of morphological trains between two geographical populations of Paralichthys olivaceus from Qingdao and Zhoushan, and they could be discriminated by meristic characters, metric characters plus truss network data.