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Ecomorphological diversification of some barbs and carps (Cyprininae, Cyprinidae) in the Lower Mekong Basin of Thailand
Zoology ( IF 2 ) Pub Date : 2020-12-01 , DOI: 10.1016/j.zool.2020.125830
Anan Kenthao 1 , Pornpimol Jearranaiprepame 2
Affiliation  

Morphological variation is fundamentally related to various aspects of fish ecology, including foraging, locomotion, and habitat utilisation. Twenty-six species of closely related cyprinid fish (n = 502) were analysed for patterns of morphological variations by using geometric morphometric methods. Ecological data of feeding and habitat preferences were determined by the observations in fields and laboratory together with the gathering of bibliographic information. The findings of major variation displayed in all parts of the fish body and correlated with ecological parameters. Variations of head shape especially form and position of mouthpart involved with feeding behaviours, whereas the variations of body depth and length which affected swimming patterns reflected responsiveness of water currents and habitat uses. Adaptation of head shape and body elongation was remarkably related to the feeding regime, swimming manoeuvrability and habitat utilisation of the species. Some convergent variation was observed between the tribes Smiliogastrini and Poropuntiini. Therefore, we propose that the morphological diversity of cyprinine fish is mainly affected by ecological gradients, while phylogenetic effects on morphology are minor.

中文翻译:

泰国湄公河下游流域某些倒钩和鲤科鱼类(鲤科、鲤科)的生态形态多样化

形态变异从根本上与鱼类生态的各个方面有关,包括觅食、运动和栖息地利用。使用几何形态测量方法分析了 26 种密切相关的鲤科鱼类 (n = 502) 的形态变化模式。取食和栖息地偏好的生态数据是通过田间和实验室的观察以及文献信息的收集来确定的。主要变异的发现显示在鱼体的所有部位,并与生态参数相关。头部形状的变化,尤其是口器的形状和位置与摄食行为有关,而影响游泳模式的身体深度和长度的变化反映了水流和栖息地使用的反应性。头部形状和身体伸长的适应与该物种的摄食方式、游泳机动性和栖息地利用显着相关。在 Smiliogastrini 和 Poropuntiini 部落之间观察到了一些趋同的变化。因此,我们认为鲤鱼的形态多样性主要受生态梯度的影响,而系统发育对形态的影响较小。
更新日期:2020-12-01
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