Asymmetric learning to avoid heterospecific males in Mesocricetus hamsters.
Asymmetric learning to avoid heterospecific males in Mesocricetus hamsters.
复制标题
中仓鼠的不对称学习以避免异种雄性。
DOI：
10.1016/j.zool.2012.01.002
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Johnston,RobertE
中科院分区：
文献类型：
--
作者：
delBarco-Trillo,Javier;Johnston,RobertE
如果一个雌性与一个近亲物种的雄性交配，她的健康状况可能会下降。因此，女性可能会发展行为机制，以避免与异性交配的男性。在某些物种中，一种这样的机制是成年雌性在接触这些雄性后学会区分异性雄性。我们以前已经表明，成年，雌性叙利亚仓鼠（Mesocricetus auratus）学习歧视男性土耳其仓鼠（Mesocricetus brandti）后，暴露于一个单一的异性男性在8天内通过铁丝网屏障。在这里，我们重复了该实验，但这次我们将雌性土耳其仓鼠与雄性叙利亚仓鼠接触8天，然后测量了对异性雄性和同种雄性的性行为和攻击行为。相反，女性叙利亚仓鼠，女性土耳其仓鼠没有不同的潜伏期进入脊柱前凸或在任何措施的侵略对任何类型的男性。雌性土耳其仓鼠花了较少的时间在脊柱前凸与异性的男性，但试验中，女性交配同种和异性的男性的百分比没有差异。当比较来自两个物种的女性已经暴露于一个异性的男性为8天，女性叙利亚仓鼠交配较少，更积极的异性男性相比，女性土耳其仓鼠的行为。我们讨论如何这两个物种的女性之间的不对称反应可能是由于更大的地理范围的土耳其仓鼠相比，叙利亚仓鼠。
If a female mates with a male of a closely related species, her fitness is likely to decline. Consequently, females may develop behavioral mechanisms to avoid mating with heterospecific males. In some species, one such mechanism is for adult females to learn to discriminate against heterospecific males after exposure to such males. We have previously shown that adult, female Syrian hamsters (Mesocricetus auratus) learn to discriminate against male Turkish hamsters (Mesocricetus brandti) after exposure to a single heterospecific male during 8days across a wire-mesh barrier. Here we repeated that experiment but this time we exposed female Turkish hamsters to a male Syrian hamster for 8days and then measured sexual and aggressive behaviors towards that heterospecific male and towards a conspecific male. In contrast to female Syrian hamsters, female Turkish hamsters did not differ in their latency to go into lordosis or in any measure of aggression towards either type of male. Female Turkish hamsters spent less time in lordosis with the heterospecific male, but the percentage of trials in which females copulated with conspecific and heterospecific males did not differ. When comparing females from both species that had been exposed to a heterospecific male for 8days, female Syrian hamsters copulated less and were more aggressive towards the heterospecific male compared to the behavior of female Turkish hamsters. We discuss how this asymmetric response between females of the two species may be due to the much larger geographical range of Turkish hamsters compared to Syrian hamsters.