| 澜沧江多鳞荷马条鳅种群间形态差异的比较 |
| Morphological Comparison of Homatula pycnolepis (Teleostei: Nemacheilidae) Among Different Geographic Populations of Lancang River, China |
| 投稿时间：2019-07-31 修订日期：2019-11-15 |
| DOI：10.15928/j.1674-3075.201907310192 |
| 中文关键词:多鳞荷马条鳅 种群 形态差异 主成分分析 澜沧江 |
| 英文关键词:Homatula pycnolepis population morphological difference principal component analysis Lancang River |
| 基金项目:国家自然科学基金 (31860603), 云南省教育厅科学研究基金项目 (2018Y116) 资助, 云南省重点学科野生动植物保护与利用 (XKZ200904) 及云南省林学一流学科建设项目(51600625) 支持 |
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| 中文摘要: |
| 荷马条鳅属Homatula隶属于鲤形目Cypriniformes条鳅科Nemacheilidae，是中国的一个特有类群。澜沧江水系目前已记录5种荷马条鳅，其中多鳞荷马条鳅Homatul pycnolepis是目前分布最广的物种，其主要通过背鳍前体覆有细密的鳞片、体侧存在更多的垂直条纹等特征与同属其他鱼类区分，澜沧江水系多个采集点的多鳞荷马条鳅均符合此特征。为探讨澜沧江水系不同采集地的多鳞荷马条鳅形态差异，将168尾多鳞荷马条鳅标本按采集地分为5组；将9尾拟鳗荷马条鳅Homatula anguillioides和19尾无量荷马条鳅Homatula wuliangensis作为对照组，共计196尾荷马条鳅标本做多变量形态度量学研究。测量了13个框架特征和23个常规特征，经3次主成分分析，澜沧江多鳞荷马条鳅不同地理种群间的形态差异超出了多鳞荷马条鳅分别与拟鳗荷马条鳅和无量荷马条鳅之间的形态差异；除多鳞荷马条鳅地模标本以外，仍有3个与同属鱼类形态特征不同的种群。经进一步对比，该3个种群应是荷马条鳅属未被描记的新种。 |
| 英文摘要: |
| Homatula belongs to Nemacheilidae of Cypriniformes, a genus of fish peculiar to China. Five species of Homatula have been recorded in the Lancang River basin, among which Homatula pycnolepis is the most widely distributed species and is distinguished from other species of the same genus by an anterior dorsal-fin covered with scales and more bars on the flank. In this study, we explored the morphological variations of five H. pycnolepis topotypes (i.e., collected from five different areas) of Lancang River using the method of multivariate morphometry and the principal component analysis. The objective was to discover new identification traits by comparing the morphologies of the different H. pycnolepis populations. A total of 168 specimens of H. pycnolepis were collected from the Lancang River and placed in 5 groups based on collection location. Nine specimens of H. anguillioides and 19 specimens of H. wuliangensis were used as control groups. Thirteen frame characteristics and 23 morphometric parameters were measured using an electronic digital vernier caliper. The morphological variations among the different H. pycnolepis topotypes collected in Lancang River exceeded the variations observed between H. pycnolepis and the two species in the control groups. Except for topotype of H. pycnolepis group, the morphological characteristics of the other H. pycnolepis specimens collected in Lancang River fell into three groups. By further comparison, the three groups appear likely to be three heretofore undescribed species of Homatula. |
| 车星锦,郭艺,刀微,周伟,李旭.2021.澜沧江多鳞荷马条鳅种群间形态差异的比较[J].水生态学杂志,42(2):64-71. |
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