化学性信号的差异可能促进伊比利亚壁虎种群之间的生殖隔离和隐种形成。

Marianne Gabirot, Pilar López, José Martín
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引用次数: 38

摘要

性信号的种群间变异可能导致过早交配、生殖隔离和物种形成。遗传和形态学研究表明,伊比利亚壁虎(Podarcis hispanica)与几个隐蔽物种构成了一个“物种复合体”的一部分。我们探讨了化学性信号在西班牙中部五个不同的伊比利亚壁蜥种群间识别中的作用。结果表明,这些种群在形态和雄性股腺分泌物中化合物的组成及比例上存在差异。舌弹实验表明,雄性和雌性蜥蜴对来自自己地区(即北方和南方种群)的蜥蜴的气味更感兴趣,但对所有种群都没有区别。此外,只有地理位置较远的种群中的雄性更喜欢自己种群中雌性的气味。这些数据表明,至少在某些种群之间,可能存在由化学信号和隐种形成介导的生殖隔离。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Differences in Chemical Sexual Signals May Promote Reproductive Isolation and Cryptic Speciation between Iberian Wall Lizard Populations.

Interpopulational variation in sexual signals may lead to premating reproductive isolation and speciation. Genetic and morphological studies suggest that the Iberian wall lizard, Podarcis hispanica, forms part of a "species complex" with several cryptic species. We explored the role of chemical sexual signals in interpopulational recognition between five distinct populations of Iberian wall lizards in Central Spain. Results showed that these populations differed in morphology and in composition and proportion of chemical compounds in femoral gland secretions of males. Tongue-flick experiments indicated that male and female lizards discriminated and were more interested in scents of lizards from their own area (i.e., Northern versus Southern populations), but did not discriminate between all populations. Moreover, only males from the populations that are geographically located more far away preferred scent of females from their own population. These data suggest that, at least between some populations, there may be reproductive isolation mediated by chemical signals and cryptic speciation.

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