Female preference for multiple partners:: sperm competition in the hide beetle, Dermestes maculatus (DeGeer)
Female preference for multiple partners:: sperm competition in the hide beetle, Dermestes maculatus (DeGeer)
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DOI：
10.1006/anbe.1999.1172
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发表时间：
1999-09-01
期刊：
影响因子：
2.5
通讯作者：
Elgar, MA
中科院分区：
文献类型：
--
作者：
Archer, MS;Elgar, MA
对一妻多夫制演变的解释要么强调直接利益，要么强调间接遗传利益。前一类解释预测雌性可能会寻求多次交配，但不一定有多个伴侣，而后一类解释则预测雌性会寻求与不同伴侣的多次交配。我们在皮甲虫中通过实验研究了这些预测，其中雌性在生殖周期中交配不止一次。雌性皮甲虫更容易与新的雄性交配，而不是与以前的伴侣交配，这表明它们交配繁殖是为了获得间接的遗传利益。在不育雄性的双重交配实验中，第二只雄性受精卵的比例变化很大。这不能用雄性体型、交配持续时间或交配顺序的变化来解释。雄性皮甲虫通过骑在雌性背上形成授精后联盟。这种行为在有竞争对手的雄性存在时更为普遍，而在有更多雌性存在时则不太常见，这表明这种行为可能是通过获得额外的交配来增加父子关系。 (C) 1999 动物行为研究协会。
Explanations for the evolution of polyandry emphasize either direct benefits or indirect genetic benefits. The former class of explanation predicts that females may seek multiple copulations but not necessarily multiple partners, while the latter predicts that females will seek multiple copulations with different partners. We investigated these predictions experimentally in the hide beetle, in which females mate more than once during their reproductive cycle. Female hide beetles remated more readily with novel males than with their previous partners, suggesting they mate multiply in order to obtain indirect, genetic benefits. In double-mating experiments with sterile males, the proportion of eggs fertilized by the second male was highly variable; this could not be explained by variation in male body size, duration of copulation or mating order. Male hide beetles form postinsemination associations by riding on the backs of females. This behaviour was more prevalent in the presence of rival males and less prevalent in the presence of additional females, suggesting that the behaviour serves to increase paternity, perhaps by obtaining additional copulations. (C) 1999 The Association for the Study of Animal Behaviour.