Female genital mutilation and monandry in an orb-web spider
Female genital mutilation and monandry in an orb-web spider
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DOI：
10.1098/rsbl.2015.0912
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发表时间：
2016-02-01
期刊：
影响因子：
3.3
通讯作者：
Nakata, Kensuke
中科院分区：
文献类型：
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作者：
Nakata, Kensuke
当雌性自发地避免再次交配，或者当雄性伴侣干扰雌性再次交配的尝试时，雌性在生殖期间只有一个交配伴侣。然而，在后一种情况下，女性往往对男性采取反制措施，这可能解释了为什么一妻多夫制普遍存在。在这里，我证明了生殖器附属物，或scape，女性圆网蜘蛛（Cyclosa argenteoalba）受伤后，她的第一次交配，可能是她的第一个男性伴侣。这种切割女性生殖器官的做法永久地阻止了交配，而且雌性似乎没有任何对策。女性生殖器切割被认为在性冲突中赋予雄性在雌性交配数量上的强大优势，它可能广泛发生在蜘蛛身上。
Monandry, in which a female has only one mating partner during the reproductive period, is established when a female spontaneously refrains from re-mating, or when a partner male interferes with the attempts of a female to mate again. In the latter case, however, females often have countermeasures against males, which may explain why polyandry is ubiquitous. Here, I demonstrate that the genital appendage, or scape, of the female orb-web spider (Cyclosa argenteoalba) is injured after her first mating, possibly by her first male partner. This female genital mutilation (FGM) permanently precludes copulation, and females appear to have no countermeasures. FGM is considered to confer a strong advantage to males in sexual conflicts over the number of female matings, and it may widely occur in spiders.