SEXUAL SIZE DIMORPHISM AND SEXUAL SELECTION IN TURTLES (ORDER TESTUDINES)
SEXUAL SIZE DIMORPHISM AND SEXUAL SELECTION IN TURTLES (ORDER TESTUDINES)
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DOI：
10.1007/bf00572678
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发表时间：
1980-01-01
期刊：
影响因子：
2.7
通讯作者：
SHINE, R
中科院分区：
文献类型：
--
作者：
BERRY, JF;SHINE, R
本文讨论了海龟性别大小二态性、繁殖行为和生境类型的已发表和原始资料。观察到的两性大小二态性模式与生境类型和雄性交配策略有关。在大多数陆生物种中，雄性会相互争斗。雄性通常比雌性长得大。在半水栖和水下游动的水生物种中，雄性的战斗不太常见，但雄性经常强迫雌性授精。与陆生物种一样，雄性通常比雌性大。在真正的水生物种中，雄性战斗和强制授精是罕见的。雄性利用精致的性交前展示，雌性的选择非常重要。雄性通常比雌性小。性行为和体型二型性之间的相关性可以用性选择理论来解释：当雄性体型大的进化为一种适应，以提高雄性战斗的成功率，或使雌性能够强制授精时，雄性比雌性大。雄性通常比雌性小，因为雄性的小体型进化是为了增加机动性（和寻找雌性的能力），或者因为增加繁殖力的选择可能导致雌性体型增加。在雄性对抗或强制授精的龟种中，雄性体型优势的程度随着物种平均体型的增加而增加。
Published and original data on sexual size dimorphism, reproductive behavior and habitat types in turtles are discussed. Observed patterns of sexual size dimorphism correlate with habitat type and male mating strategy. In most terrestrial species, males engage in combat with each other. Males typically grow larger than females. In semiaquatic and bottom-walking aquatic species, male combat is less common, but males often forcibly inseminate females. As in terrestrial species, males are usually larger than females. In truly aquatic species, male combat and forcible insemination are rare. Males utilize elaborate precoital displays, and female choice is highly important. Males are usually smaller than females. These correlations between sexual behavior and size dimorphism are explained in terms of sexual selection theory: males are larger than females when large male size evolves as an adaptation to increase success in male combat, or to enable forcible insemination of females. Males are usually smaller than females where small size in males evolves to increase mobility (and ability to locate females), or because selection for increased fecundity may result in increased female size. In turtle species with male combat or forcible insemination, the degree of male size superiority increases with mean species body size.