Correlated evolution of body and fin morphology in the cichlid fishes
Correlated evolution of body and fin morphology in the cichlid fishes
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DOI：
10.1111/evo.13021
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发表时间：
2016-10-01
期刊：
影响因子：
3.3
通讯作者：
Feilich, Kara L.
中科院分区：
文献类型：
--
作者：
Feilich, Kara L.
身体和鳍的形状是鱼类游泳表现的主要决定因素。不同配置的机身和鳍形状可以适应不同的运动机专业。任何布局的成功都取决于船体和鳍之间的水动力相互作用。尽管身体和鳍的相互作用对游泳很重要，但很少有数据表明身体和鳍的结构是否协同进化，或者这些结构是否独立变化。慈鱼科鱼类是一个多样性的科，其系统发育关系的研究使它们成为生态地貌学宏观进化研究的理想对象。本研究利用形态计量学和系统发育比较的方法，对131属鱼类的体型、尾鳍和中鳍的形态进行了测量，以确定这些特征是否表现出相关的进化。偏最小二乘典范分析表明，体鳍、尾鳍、背鳍和肛鳍形状均表现出与运动生态形态高度相关的进化规律。主要的模式包括具有长鳍的深部身体轮廓的演变，暗示着机动的专门化；以及狭窄、细长的尾柄和凹尾的演变，这是经济型巡洋舰的特征。这些结果表明，身体形状的进化并不是独立于其他特征发生的，而是在一系列其他形态变化中发生的，这些变化增强了运动的专门化。
Body and fin shapes are chief determinants of swimming performance in fishes. Different configurations of body and fin shapes can suit different locomotor specializations. The success of any configuration is dependent upon the hydrodynamic interactions between body and fins. Despite the importance of body-fin interactions for swimming, there are few data indicating whether body and fin configurations evolve in concert, or whether these structures vary independently. The cichlid fishes are a diverse family whose well-studied phylogenetic relationships make them ideal for the study of macroevolution of ecomorphology. This study measured body, and caudal and median fin morphology from radiographs of 131 cichlid genera, using morphometrics and phylogenetic comparative methods to determine whether these traits exhibit correlated evolution. Partial least squares canonical analysis revealed that body, caudal fin, dorsal fin, and anal fin shapes all exhibited strong correlated evolution consistent with locomotor ecomorphology. Major patterns included the evolution of deep body profiles with long fins, suggestive of maneuvering specialization; and the evolution of narrow, elongate caudal peduncles with concave tails, a combination that characterizes economical cruisers. These results demonstrate that body shape evolution does not occur independently of other traits, but among a suite of other morphological changes that augment locomotor specialization.