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首页> 外文期刊>Behavioral Ecology and Sociobiology >Adult female hamsters avoid interspecific mating after exposure to heterospecific males
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Adult female hamsters avoid interspecific mating after exposure to heterospecific males

机译：成年雌性仓鼠在接触异种雄性后避免种间交配

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When females mate with a heterospecific male, they do not usually produce viable offspring. Thus, there is a selective pressure for females to avoid interspecific mating. In many species, females innately avoid heterospecific males; females can also imprint on their parents to avoid later sexual interactions with heterospecific males. However, it was previously unknown whether adult females can learn to discriminate against heterospecific males. We tested the hypothesis that adult females previously unable to avoid interspecific mating learn to avoid such mating after being exposed to heterospecific males. Syrian hamster (Mesocricetus auratus) females not previously exposed to Turkish hamster (Mesocricetus brandti) males can discriminate between odors of conspecific and heterospecific males, but they mate with either type of male. However, when we exposed adult females to both a conspecific male and a heterospecific male through wire-mesh barriers for 8 days, and then paired them sequentially with the two males, females were more receptive to conspecific males and more aggressive to heterospecific males. When females were paired with the heterospecific male first and the conspecific male second, no female was receptive and all were aggressive to heterospecific males. When females were paired with the conspecific male first, only 43% of females were then aggressive toward the heterospecific male. That is, interactions with conspecific males may decrease a female’s ability to properly avoid heterospecific males. Our study clearly shows for the first time that females can learn during adulthood to avoid interspecific mating just by being exposed to stimuli from heterospecific males.
机译：当雌性与异种雄性交配时，它们通常不会产生存活的后代。因此，雌性有选择压力以避免种间交配。在许多物种中，雌性天生就避免异种雄性。女性也可以在父母身上留下印记，以避免以后与异种男性发生性行为。但是，以前不知道成年雌性是否可以学会区别异种雄性。我们检验了以下假设：成年雌性以前无法避免种间交配，在接触异种雄性后学会避免这种交配。叙利亚仓鼠（Mesocricetus auratus）雌性先前未接触过土耳其仓鼠（Mesocricetus brandti）雄性，可以区分同种和异种雄性的气味，但它们与这两种雄性交配。但是，当我们通过网状屏障将成年雌性同时暴露于同种雄性和异种雄性中8天，然后将它们与两个雄性进行配对时，雌性更容易接受同种雄性，而对异种雄性则更具攻击性。当雌性先与异种雄性配对，然后与同种雄性配对时，则没有雌性可以接受，所有人都对异种雄性具有攻击性。当雌性首先与同种雄性配对时，只有43％的雌性随后向异种雄性进发。也就是说，与同种雄性的互动可能会降低雌性适当避免异种雄性的能力。我们的研究清楚地表明，女性仅在成年期就可以通过暴露于异种雄性的刺激而避免种间交配。

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