Building a Body Shape Morphospace of Teleostean Fishes
Building a Body Shape Morphospace of Teleostean Fishes
复制标题
DOI：
10.1093/icb/icz115
复制
发表时间：
2019-09-01
影响因子：
2.6
通讯作者：
Wainwright, P. C.
中科院分区：
文献类型：
--
作者：
Price, S. A.;Friedman, S. T.;Wainwright, P. C.
我们提供了一个数据集，该数据集可以量化硬骨鱼类系统发育过程中三维的身体形状。由史密森国家自然历史博物馆的一组研究人员对标本上易于识别的、功能相关的特征进行了测量，它包含了394个科6144个物种的16,609个标本的数据。利用系统发育比较的方法对数据集进行分析，描述了硬骨动物的体型形态空间，并识别出形态进化速度非常快的家族。利用原木形状比，我们首选的体型校正方法，揭示了鱼宽是硬骨鱼形态进化的主轴，描述了从窄体横向压缩比目鱼到宽体背腹扁平鱼的连续体。伸长是形态变异的第二轴，发生在较窄的体型中。这一结果突显了在硬骨鱼身上工作时收集三维形状的重要性。我们的分析还发现，由无齿类和蝎形动物组成的分支的形状进化速度最快，它们主要在寒冷的水域中茁壮成长和/或具有底栖习性，以及淡水象鱼，正如它们的名字所暗示的那样，它们有新的头部和身体形状。这一史无前例的硬骨鱼体型数据集将使研究控制体型多样化的因素成为可能。生物力学原理将身体形态与表现和生态联系起来，是未来研究的一条很有前途的途径。
We present a dataset that quantifies body shape in three dimensions across the teleost phylogeny. Built by a team of researchers measuring easy-to-identify, functionally relevant traits on specimens at the Smithsonian National Museum of Natural History it contains data on 16,609 specimens from 6144 species across 394 families. Using phylogenetic comparative methods to analyze the dataset we describe the teleostean body shape morphospace and identify families with extraordinary rates of morphological evolution. Using log shape ratios, our preferred method of body-size correction, revealed that fish width is the primary axis of morphological evolution across teleosts, describing a continuum from narrow-bodied laterally compressed flatfishes to wide-bodied dorsoventrally flattened anglerfishes. Elongation is the secondary axis of morphological variation and occurs within the more narrow-bodied forms. This result highlights the importance of collecting shape on three dimensions when working across teleosts. Our analyses also uncovered the fastest rates of shape evolution within a clade formed by notothenioids and scorpaeniforms, which primarily thrive in cold waters and/or have benthic habits, along with freshwater elephantfishes, which as their name suggests, have a novel head and body shape. This unprecedented dataset of teleostean body shapes will enable the investigation of the factors that regulate shape diversification. Biomechanical principles, which relate body shape to performance and ecology, are one promising avenue for future research.