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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >Variation in allometric shell growth and relationship with sexual size dimorphism in repatriated Indian star tortoises (Geochelone elegans) (Reptilia: Testudinidae)
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Variation in allometric shell growth and relationship with sexual size dimorphism in repatriated Indian star tortoises (Geochelone elegans) (Reptilia: Testudinidae)

机译：归还的印度星龟（线虫（Geochelone elegans））的异速成壳生长变化及其与性大小二态性的关系（Reptilia：Testudinidae）

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摘要

This study assesses the rate and pattern of variation of allometric shell growth in Indian star tortoise Geochelone elegans. Morphometric measurements of 83 Indian star tortoises were taken over 6 months. The anal notch measurements correctly classified the sex of the individuals based on the results of multiple regression analysis and chi-square test. Discriminant analysis clustered the growth rates into three age groups. The shell growth across sexes varied with age and morphometric measurements of the shell characters (length in males; width in females). The increase in straight carapace width and plastron length (PL) was significantly different across sexes (females > males and males > females respectively) in 5-7 years age class only. A pronounced increase in PL in males and overall width in females only in the age class of 7-9 years may indicate the influence of sexual selection. The difference in allometric shell growth (in males and females) may thus lead to sexually dimorphic adults.
机译：这项研究评估了印度星龟象鼻线虫线虫壳异速生长的速率和变化模式。在六个月内对83头印度星龟进行了形态测量。肛门切口测量基于多元回归分析和卡方检验的结果正确分类了个体的性别。判别分析将增长率分为三个年龄组。壳的性别增长随年龄和壳特征的形态测量（雄性长;雌性宽）而变化。仅在5-7岁年龄段，不同性别（分别为女性>男性和男性>女性）的直甲宽度和腹甲长度（PL）的增加差异显着。仅在7-9岁年龄段中，男性的PL显着增加，女性的总体宽度显着增加可能表明性别选择的影响。因此，异速成壳生长的差异（雄性和雌性）可能导致成年性两态。

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