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首页> 外文期刊>Ethology >Precopulatory Sexual Cannibalism Causes Increase Egg Case Production, Hatching Success, and Female Attractiveness to Males
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Precopulatory Sexual Cannibalism Causes Increase Egg Case Production, Hatching Success, and Female Attractiveness to Males

机译：早熟的性食人症导致蛋箱生产增加，孵化成功以及女性对男性的吸引力

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Precopulatory sexual cannibalism is an extreme form of sexual conflict that can entail significant costs to the cannibalized individual and a variety of costs and benefits to the cannibal itself. Characterizing these costs and benefits is fundamental to our understanding of how this behavior evolves. Using the spider Agelenopsis pennsylvanica, we tested the reproductive consequences of precopulatory sexual cannibalism by staging cannibalization events and comparing the performance of experimental cannibals against natural cannibals (i.e., those that cannibalized on their own) and non-cannibals. We found two performance benefits associated with precopulatory sexual cannibalism: first, experimental cannibals were more likely to produce egg cases than non-cannibals, and second, egg cases from experimental cannibals and natural cannibals were significantly more likely to hatch than those produced by non-cannibals. We then tested whether males were more likely to approach the webs of experimental cannibals vs. non-cannibalistic control females. Our data demonstrate that sexual cannibalism increases female attractiveness to males. Although this result seems counterintuitive, in fact, rates of precopulatory sexual cannibalism were much lower in females that had already cannibalized their first male: 38% of sexually naive females engaged in precopulatory sexual cannibalism, whereas only 5% of females engaged in cannibalism a second time. Thus, males that approach cannibals receive two benefits: they are less likely to be cannibalized precopula, and they have the possibility of mating with females that have a higher probability of producing viable egg cases. Taken together, our data suggest that precopulatory sexual cannibalism affords females numerous benefits and may have a hand in shaping male mate choice decisions.
机译：交配前的食人性行为是性冲突的一种极端形式，可能给被食人者带来巨大的成本，并给食人者带来各种成本和收益。表征这些成本和收益是我们了解这种行为如何演变的基础。我们使用蜘蛛Agelenopsis pennsylvanica，通过分阶段进行食人族化事件并比较实验性食人族与天然食人族（即自己食人族的食人族）和非食人族的性能，测试了交配前性食人族的生殖后果。我们发现与交配前性食人族有两个性能上的好处：第一，实验性食人族比非食人族更容易产卵，第二，实验食人族和天然食人族比非食人族更容易孵化。食人族。然后，我们测试了男性是否更可能接近实验性食人者与非食人性对照女性的网络。我们的数据表明，自相残杀会增加女性对男性的吸引力。尽管此结果似乎违反直觉，但实际上，已经对第一名男性进行了蚕食的女性的早熟性食人性的比率要低得多：38％的未婚女性中从事过食肉性食人性的女性，而只有5％的女性第二次从事食人性时间。因此，接近食人族的雄性有两个好处：它们不易被食人性的前粘毛虫吞噬;它们有可能与具有较高产卵盒可能性的雌性交配。综上所述，我们的数据表明，交配前的自相残杀为女性带来了许多好处，并且可能有助于塑造男性的择偶决定。

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