Shape variation and functional adaptation in a structure involved in the feeding system of gobiid fishes,Journal of Zoology

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Shape variation and functional adaptation in a structure involved in the feeding system of gobiid fishes
Journal of Zoology ( IF 1.9 ) Pub Date : 2020-06-23 , DOI: 10.1111/jzo.12796
M. Iranmanesh ₁ , M. Askari Hesni ₁ , M. Lashkari ₂ , A. Teimori ₁

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Fish are observed in different aquatic environments, including freshwater, marine and also intertidal zones. It is suggested that the urohyal bone is involved in the feeding function of fish. Information about the urohyal bone in different fish groups, including gobiids is rare. In the present study, changes in the shape of the urohyal bone were studied in seven gobiid fish from the intertidal environments of the Persian Gulf and the Gulf of Oman by applying shape analysis and geometric morphometric analyses. The results revealed that the shape of the urohyal bone in each species was distinct, which is almost consistent with their phylogenetic relationships. Periophthalmus waltoni inhabits often terrestrial habitats and requires a system to obtain food. The specific shape of the urohyal bone in this species probably results from a functional adaptation to obtain food from the terrestrial environment. Moreover, our results indicated that the shape variation in the urohyal bone of the studied species is linked to their feeding because the calculation of E index categorized those species with similar feeding regimes into one group. In conclusion, we assumed that the urohyal shape variation in the studied gobiid species is the result of compatibility to the various feeding regimes, and it is likely controlled by genetic factors. Furthermore, the results support the usefulness of the urohyal bone morphology in differentiating the studied gobiid species and highlighting the taxonomic value of the urohyal bone.

中文翻译：

戈壁鱼饲养系统所涉及结构的形状变化和功能适应

在不同的水生环境中观察到鱼类，包括淡水，海洋以及潮间带。建议尿道透明质骨参与鱼的摄食功能。有关包括戈壁鱼在内的不同鱼类中的尿透明质骨的信息很少。在本研究中，通过应用形状分析和几何形态分析，研究了来自波斯湾和阿曼湾潮间环境的七种戈壁鱼的尿透明质骨形状的变化。结果表明，每个物种的尿透明骨的形状是不同的，这几乎与它们的系统发育关系一致。沃尔顿猫经常栖息在陆地上，需要一个系统来获取食物。该物种中的尿道透明骨的特定形状可能是由于从陆地环境中获取食物的功能适应所致。此外，我们的结果表明，所研究物种的尿透明骨的形状变化与它们的摄食有关，因为E指数的计算将具有相似摄食方式的那些物种归为一类。总之，我们假设研究的戈壁类动物的尿透明形状变化是与各种饲养方式相容的结果，并且很可能受遗传因素控制。此外，结果支持尿液透明骨形态学在区分所研究的戈壁菌种和突出尿液透明性骨分类学价值方面的有用性。

更新日期：2020-06-23

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