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首页> 外文期刊>Animal behaviour >Male mate preferences in a gynogenetic species complex of Amazon mollies
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Male mate preferences in a gynogenetic species complex of Amazon mollies

机译：亚马逊软体动物雌雄同体种复合体中的雄性配偶偏好

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摘要

Female Amazon mollies, Poecilia formosa, are gynogenetic and mate with males of a sexual species, P. latipinna or P. mexicana, for successful reproduction. It was found that both species of males are able to distinguish between conspecific females and Amazon mollies, and preferentially mate with the former. Male mate preference per se is not an evolved response to avoid mating with Amazon mollies; male P. latipinna that are from populations currently allopatric with Amazon mollies also prefer conspecifics. The strength of this preference, however, is stronger in P. latipinna from populations sympatric with Amazon mollies than in P. latipinna from populations that are allopatric with the gynogen, suggesting that reproductive character displacement in mating preferences has occurred. Male size did not influence mating decisions; thus, the hypothesis was rejected that the gynogens are usually mated by smaller, younger males, which have yet to learn to discriminate between females. Unlike some previous studies, it was shown that P. mexicana can discriminate between conspecific females and Amazon mollies, although the strength of preference might be weaker in P. mexicana than in P. latipinna. Male P. latipinna and P. mexicana differed in their choices between females of the two heterospecific species in the complex. Male P. latipinna were reluctant to mate at all when given a choice between the two heterospecific females, P. mexicana and P. formosa. Poecilia mexicana males, alternatively, showed high mate attraction to P. formosa when these females were paired with P. latipinna females. This result is intriguing, given that it is thought that female P. mexicana and male P. latipinna were involved in the original hybridization event that gave rise to P. formosa. Therefore, the strong attractiveness of P. formosa to P. mexicana may be related to a maternally derived genetic component.
机译：雌性亚马逊Amazon（Poecilia formosa）具有雌性生殖能力，并与有性物种（P. latipinna或P. mexicana）的雄性交配，以成功繁殖。发现这两种雄性都能够区分同种雌性和亚马逊软体动物，并优先与前者交配。男性伴侣的偏好本身并不是为了避免与亚马逊软体动物交配而进化的反应。来自目前与亚马逊软体动物同种异体的种群的雄性P. latipinna也更喜欢同种。然而，这种偏爱的强度，在与亚马逊mol虫同胞的人群中的拉提普森菌中比与雌激素同种异体的人群的拉提森那更强，这表明在交配偏好中已经发生了生殖性状的移位。雄性大小不影响交配决定；因此，这一假设被否定，认为雌激素通常是由较小的，较年轻的雄性交配的，而这些雄性还没有学会区分雌性。与以前的一些研究不同，研究表明，墨西哥疟原虫可以区分同种雌性和亚马逊软体动物，尽管墨西哥疟原虫的偏好强度可能比拉提芬那霉弱。在复合体中两种异种物种的雌性之间，雄性P. latipinna和P. mexicana的选择有所不同。当在两个异种雌性墨西哥墨西哥疟疾和福尔摩亚疟原虫之间进行选择时，雄性拉提芬那犬根本不愿交配。另外，当这些雌性与拉氏疟原虫配对时，墨西哥Poecilia mexicana雄性表现出对福尔摩沙对虾的高伴侣吸引力。鉴于认为雌性墨西哥假单胞菌和男性拉蒂宾纳假单胞菌参与了最初的杂交事件，形成了福尔摩斯假单胞菌，因此该结果令人感兴趣。因此，福尔摩斯对墨西哥墨西哥假单胞菌的强吸引力可能与母本衍生的遗传成分有关。

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