Fromhage Lutz, Schneider Jutta M
Institute of Evolutionary Biology and Ecology, University of Bonn, 53121 Bonn, Germany.
Naturwissenschaften. 2005 Sep;92(9):423-6. doi: 10.1007/s00114-005-0011-z. Epub 2005 Oct 28.
In several animal species, females discriminate against previous mates in subsequent mating decisions, increasing the potential for multiple paternity. In spiders, female choice may take the form of selective sexual cannibalism, which has been shown to bias paternity in favor of particular males. If cannibalistic attacks function to restrict a male's paternity, females may have little interest to remate with males having survived such an attack. We therefore studied the possibility of female discrimination against previous mates in sexually cannibalistic Argiope bruennichi, where females almost always attack their mate at the onset of copulation. We compared mating latency and copulation duration of males having experienced a previous copulation either with the same or with a different female, but found no evidence for discrimination against previous mates. However, males copulated significantly shorter when inserting into a used, compared to a previously unused, genital pore of the female.
在几种动物物种中,雌性在后续的交配决策中会歧视前配偶,从而增加了多重父权的可能性。在蜘蛛中,雌性选择可能表现为选择性性食同类行为,这种行为已被证明会使父权偏向特定雄性。如果食同类攻击的作用是限制雄性的父权,那么雌性可能对与在这种攻击中幸存下来的雄性再次交配兴趣不大。因此,我们研究了在性食同类的布鲁氏园蛛中雌性歧视前配偶的可能性,在这种蜘蛛中,雌性几乎总是在交配开始时攻击其配偶。我们比较了与同一雌性或不同雌性有过先前交配经历的雄性的交配潜伏期和交配持续时间,但没有发现歧视前配偶的证据。然而,与插入雌性先前未使用过的生殖孔相比,雄性插入已使用过的生殖孔时交配时间明显更短。