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首页> 外文期刊>Behavioral Ecology and Sociobiology >Inbreeding level does not induce female discrimination between sibs and unrelated males in guppies
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Inbreeding level does not induce female discrimination between sibs and unrelated males in guppies

机译：近亲繁殖水平不会在雌性孔雀鱼中引起女性同胞和无关男性之间的歧视

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摘要

Significant empirical evidence has demonstrated the importance of discriminative mate choice as a mechanism to avoid inbreeding. Incestuous mating can be avoided by recognition of kin. The guppy, Poecilia reticulata, is a livebearer with a polygamous mating system and active female choice. Despite potential inbreeding costs in the guppy, Viken et al. (Ethology 112:716–723, 2006) and Pitcher et al. (Genetica 134:137–146, 2008) have found that females do not discriminate between sibs and unrelated males. However, populations experiencing different inbreeding histories can have different levels of inbreeding avoidance, and it is possible that the lack of inbreeding avoidance observed in guppies is a consequence of using outbred fish only. Here we tested the preference of female guppies with different inbreeding coefficients, for olfactory cues of males that were either unrelated but had the same inbreeding coefficient, or were related (i.e. brother) with the same inbreeding coefficient. We found no evidence that female guppies preferred unrelated males with the same inbreeding coefficient. Moreover, inbreeding level did not influence female preference for unrelated males, suggesting that inbreeding history in a population has no influence on female discrimination of unrelated males in guppies.
机译：大量的经验证据表明，选择有选择的配偶作为避免近亲繁殖的机制非常重要。认识亲戚可以避免近亲交配。孔雀鱼（Poecilia reticulata）是一夫多妻，拥有一夫多妻制的交配系统和活跃的雌性选择。尽管孔雀鱼有潜在的近亲繁殖成本，Viken等人。 （Ethology 112：716-723，2006）和Pitcher等人。 （Genetica 134：137-146，2008）发现，女性并不能区分同胞和无关的男性。但是，经历不同近交史的种群可以有不同程度的近交回避，在孔雀鱼中观察到缺乏近交回避可能是仅使用近交鱼类的结果。在这里，我们测试了近交系数不同的雌性孔雀鱼对雄性的嗅觉线索的偏好，这些线索既不相关但近交系数相同，或者与近亲繁殖系数相关（即兄弟）。我们没有发现证据表明雌性孔雀鱼喜欢近亲繁殖系数相同的不相关的雄性。此外，近亲繁殖水平不会影响女性对无关男性的偏爱，这表明人口的近交史对孔雀鱼中无关男性的女性歧视没有影响。

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