Female Resistance and Precopulatory Guarding in the Isopod Idotea Baltica (Pallas)
Female Resistance and Precopulatory Guarding in the Isopod Idotea Baltica (Pallas)
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等足动物 Idotea Baltica (Pallas) 的女性抵抗和交配前守护
DOI：
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
S. Merilaita
中科院分区：
文献类型：
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作者：
V. Jormalainen;S. Merilaita
在一个实验室实验中，在波罗的海，在进行前繁殖期守卫之前，两性之间有一段斗争时期，因为男性不断试图发起前繁殖期守卫，而女性则抵制他们的守卫企图。这种挣扎持续了几天，在此期间，雌性以平均每小时1.3次的速度逃离雄性。当雌性反抗时，雄性通常会反击。一旦前卵丘开始，平均43小时前完成的女性分娩蜕皮，女性的阻力停止。如果守卫的雄性被另一个雄性取代，雌性会毫无抵抗地接受新的雄性，或者只是微弱地抵抗。较大的男性能够执行较长的prepulas，此外，当男性饥饿强调他们执行较短的prepulas比对照组男性。女性的反抗和斗争的存在意味着两性之间关于是否开始前富裕阶段的冲突。这种冲突的发生可能是因为不同的最佳precopula时间的性别或因为女性不愿意与任何男性配对。通过抵抗，雌性可以至少在一定程度上控制守卫的持续时间，而抵抗可能导致在雄性候选人中进行选择。因此，雌性抗性，虽然到目前为止在很大程度上被忽视，可能有潜在的重要性，在交配选择和性选择的水生甲壳动物与precopulatory守卫。
In a laboratory experiment in I. baltica the precopulatory guarding was preceded by a period of struggles between the sexes as males continuously tried to initiate the precopulatory guarding and females resisted their guarding attempts. This struggling lasted for a few days, during which the females escaped from the males on the average 1.3 times per hour. While the females resisted, the males usually responded by kicking back. Once the precopula started, on the average 43 h before the completion of the female parturial ecdysis, the female resistance stopped. If the guarding male was replaced by another male, the female accepted the new male without resistance or resisted only weakly. Larger males were able to perform longer precopulas, and furthermore, when males were hunger stressed they performed shorter precopulas than control males. The female resistance and the existence of struggles imply a conflict between the sexes over whether or not to start the precopulatory phase. This conflict may occur either because of different optimum precopula duration of the sexes or because of the unwillingness of the females to pair with whatever male. By resisting, females may, at least to some extent, control the duration of the guarding, and the resistance may lead to selection among male candidates. Thus the female resistance, although for so far largely neglected, may have potential importance in the mate choice and sexual selection of aquatic crustaceans with precopulatory guarding.