Sexual Dimorphism in Body Size and Shape of Beal's Eyed Turtle (Sacalia bealei)

IF 0.9 4区生物学 Q3 ZOOLOGY

Chelonian Conservation and Biology Pub Date : 2017-08-31 DOI:10.2744/CCB-1225.1

Liu Lin, Daniel Gaillard, Qingru Hu, Jiangbo Yang, Zhongdong Chen, Feiyu Zhou, F. Xiao, H. Shi

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引用次数: 3

Abstract

Abstract We studied the sexual dimorphism in body size and shape of Beal's eyed turtle, Sacalia bealei, by measuring 15 morphological characteristics of 68 adult individuals (40 females, 28 males) collected from Fujian Province, China. Females were slightly larger than males in carapace length with a sexual dimorphism index of 0.09. This translated into greater absolute values of females for all the traits we measured except for tail length, preanal tail length, and analia to supracaudal junction length. Comparisons between the sexes of size-corrected morphological traits indicated that females exhibited a longer plastron and higher carapace relative to carapace length, thereby providing a larger internal volume. Females also exhibited relatively wider heads. In males, the plastron was smaller and more indented than in females and the openings between the plastron and the carapace were also more developed. Overall, females were larger in size and displayed a more voluminous shell than did males while males had longer tails and larger spaces available to move the legs, head, and tail.

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Beal’s Eyed Turtle（Sacalia bealei）体型的两性异形

摘要通过对福建省采集的68只成年个体（40只雌性，28只雄性）的15个形态特征的测量，研究了Beal’s eyed龟Sacalia bealei在体型和体型上的两性异形。雌性的甲壳长度略大于雄性，两性异形指数为0.09。这转化为我们测量的所有性状的雌性的绝对值更大，除了尾巴长度、肛门前尾巴长度和肛门到甲叉上连接部的长度。大小校正形态特征的性别之间的比较表明，相对于外壳长度，雌性表现出更长的质体和更高的外壳，从而提供更大的内部体积。雌性也表现出相对较宽的头部。雄性的质体比雌性更小、更凹陷，质体和外壳之间的开口也更发达。总体而言，雌性比雄性体型更大，外壳更大，而雄性则有更长的尾巴和更大的空间来移动腿、头和尾巴。

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来源期刊

Chelonian Conservation and Biology 生物-动物学

CiteScore

1.70

自引率

14.30%

发文量

审稿时长

>12 weeks

期刊介绍： Chelonian Conservation and Biology is a biannual peer-reviewed journal of cosmopolitan and broad-based coverage of all aspects of conservation and biology of all chelonians, including freshwater turtles, marine turtles, and tortoises. Manuscripts may cover any aspects of turtle and tortoise research, with a preference for conservation or biology. Manuscripts dealing with conservation biology, systematic relationships, chelonian diversity, geographic distribution, natural history, ecology, reproduction, morphology and natural variation, population status, husbandry, community conservation initiatives, and human exploitation or conservation management issues are of special interest.