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首页> 外文期刊>Belgian Journal of Zoology >Allometry of external morphology and sexual dimorphism in the red porgy (Pagrus pagrus)
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Allometry of external morphology and sexual dimorphism in the red porgy (Pagrus pagrus)

机译：红豚鼠（Pagrus pagrus）的外部形态和性二态性的异构关系

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摘要

Body weight (W), nine morphometric variables and total length (TL) were estimated for each sex in the protogynous red porgy, (Pagrus pagrus) reared in captivity. The power function Y=aX(b) was used to evaluate growth-related changes in morphology. The first derivative, dY/dTL=abTL(b-1), where Y is each morphometric character, was used to study the growth pattern of each character relative to growth in length (TL). The length-weight relationship showed isometric growth and no inter-sex variability. The analysis of the morphometric variables demonstrated the existence of a substantial degree of differences between the sexes. Males showed an isometric growth pattern (I) for head height and an accelerated (+A) or retarded (-A) growth pattern for the pre-orbital and post-orbital distance, respectively. However, females showed a retarded (-A) growth rate of the head height and an isometric growth pattern (I) for pre-orbital and post-orbital distances. Thus, the male red porgy appears to have a taller head compared to females. Additionally, the head in males is wider and the orbits are positioned more posteriorly in the head. The adaptive significance of these differences remains currently unclear but should be studied in relation to protogynous hermaphroditism and the specific features of male biology in the red porgy.
机译：圈养圈养的原生雌性红豚鼠（Pagrus pagrus）中，每种性别的体重（W），九个形态计量变量和总长度（TL）均被估算。幂函数Y = aX（b）用于评估与生长相关的形态变化。一阶导数dY / dTL = abTL（b-1），其中Y是每个形态特征，用于研究每个字符相对于长度（TL）的生长方式。长度与体重的关系显示出等长的增长，并且没有性别间的差异。对形态计量变量的分析表明，性别之间存在相当大程度的差异。雄性分别显示出头部高度的等距生长模式（I）和眼眶前和眼后距离的加速（+ A）或延迟（-A）生长模式。然而，雌性显示出头高的发育迟缓（-A）增长和眼眶前和眼眶后距离的等距增长模式（I）。因此，与雌性相比，雄性红斑豚似乎具有更高的头部。另外，雄性的头部更宽，轨道位于头部的后部。这些差异的适应性意义目前尚不清楚，但应与雌雄同性雌雄同体和红豚鼠中男性生物学的特定特征进行研究。

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