Scale morphology is a promising, additional tool for exploring the taxonomy and ecology of freshwater fishes,Fish and Fisheries

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Scale morphology is a promising, additional tool for exploring the taxonomy and ecology of freshwater fishes
Fish and Fisheries ( IF 5.6 ) Pub Date : 2024-03-28 , DOI: 10.1111/faf.12826
Bálint Bánó _{1,

2,

3} , Aleksey Bolotovskiy ₄ , Boris Levin _{4,

5} , George M. T. Mattox ₆ , Mauricio Cetra ₇ , István Czeglédi _{2,

3} , Péter Takács ₃

Affiliation

It has long been recognized that presence–absence, localisation, size, number and shape of fish scales can be important taxonomic features. Although there are some notes on the relationship between scale morphology and ecological needs, in the absence of a sufficiently large and detailed database, the morphological variability of fish scales and the factors responsible for this variability have not yet been explored in detail. For this reason, a database—which contains the shape and relative size data of 193 freshwater fish taxa of 14 orders, originated from five biogeographic realms—has been built. Database analyses showed that both the scale shape and relative size are proper taxonomic indicators. They can be used to separate higher taxonomic categories (e.g., orders), and by the simultaneous analysis of shape and size scale morphology, we showed increased sensitivity for species‐level detachments. Our results suggest that while both the shape and the size of the fish scales are genetically determined, they are also useful descriptors of the niche segregation (habitat use, flow preference) of close relative species. Scale morphology is a promising additional tool to specify the environmental preferences of lesser known or close relative recent and extinct fish species. And also can be of great help in such cases when only the scales are available for taxonomic identification, for example, in the research field of archaeology and palaeontology.

中文翻译：

鳞片形态学是探索淡水鱼类分类学和生态学的一种有前景的附加工具

人们很早就认识到，鱼鳞的存在与否、定位、大小、数量和形状可能是重要的分类学特征。尽管有一些关于鳞片形态与生态需求之间关系的注释，但由于缺乏足够大和详细的数据库，鱼鳞的形态变异性以及造成这种变异性的因素尚未得到详细探讨。为此，建立了一个数据库，其中包含来自五个生物地理领域的14目193个淡水鱼类类群的形状和相对大小数据。数据库分析表明，尺度形状和相对大小都是适当的分类指标。它们可用于分离更高的分类类别（例如目），并且通过同时分析形状和尺寸尺度形态，我们显示出对物种级别分离的敏感性增加。我们的结果表明，虽然鱼鳞的形状和大小都是由基因决定的，但它们也是近缘物种的生态位隔离（栖息地利用、流动偏好）的有用描述。鳞片形态是一种很有前途的附加工具，可以用来确定鲜为人知或关系密切的近期和灭绝鱼类的环境偏好。在只有尺度可用于分类学识别的情况下，例如在考古学和古生物学研究领域，也可以提供很大的帮助。

更新日期：2024-03-28

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