摘要
为确认分布于闽江、珠江、红河水系和海南岛的东方墨头鱼居群间存在的形态差异是否达到亚种或种的水平,该文将采自上述4个水系共72尾标本根据水系分为四组,比较了10个外部形态特征,并运用多变量形态度量学方法,对13个框架结构特征和23个常规特征进行分析。主成分分析结果散点图显示,海南岛居群相对集中,但仍未能与其他3个水系居群完全区分,而其他3个水系居群则完全混杂在一起。该研究结果表明,形态特征比较和形态度量学分析难以区分东方墨头鱼的不同地理居群,其种或种下分化研究需借助于分子生物学方法。
Morphological differences were found among specimens of Garra orientalis from Minjiang River, Pearl River, Red River and Hainan Island. To confirm whether the morphological differences among these geographical populations had reached the level of subspecies or species, seventy-two specimens of Garra orientalis were divided into four groups according to the four drainage areas stated above. Ten external morphological characteristics were observed. Thirteen frame characteristics and twenty-three general characteristics were measured and analyzed for multivariate morphometrics. In scatter plots of principal components, the specimens from Hainan Island were relatively concentrated on the scatter plots, but were not completely separated from the other three drainages. The samples from the other three drainages were completely mixed together. These results indicated that the specimens from the different drainages could not be distinguished by morphological comparison and morphometric analysis. Species or subspecies level differentiation of Garra orientalis among geographical populations could instead be studied by molecular biological methods in the future.
基金
国家自然科学基金(NSFC31160419)
云南省重点学科野生动植物保护与利用项目(XKZ200904)
关键词
东方墨头鱼
主成分分析
形态度量学
Garra orientalb
Principal component analysis
Methods of multivariate morphometrics
