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首页> 外文期刊>Ethology >Is male cohabitation costly for females of the spider Stegodyphus lineatus (Eresidae)?
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Is male cohabitation costly for females of the spider Stegodyphus lineatus (Eresidae)?

机译：蜘蛛隐身线虫（Eresidae）的雌性同居是昂贵的吗？

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摘要

Reproductive interests of females and males can vary over a number of issues, including the number of matings and the occurrence and duration of mate guarding and cohabitation. The mating system of the spider Stegodyphus lineatus (Eresidae) is characterized by an exceptional sexual conflict where males induce females to remate by committing infanticide. Females experience high costs because of this male strategy, while males benefit. During the mating season, males tend to stay with females for several days. We examined whether this male strategy of cohabitation is also disadvantageous for females of S. lineatus. A field experiment revealed that male presence in a female's nest negatively affected her body condition, whereas cohabiting males gained weight because they fed on prey caught in webs of females. As a response, females did not renew their webs when males were present. Thus, females with a cohabiting male experienced the combined cost of prey loss and loss of time available for foraging. These costs are expected to increase with every additional cohabiting male. Mated females behaved more aggressively toward males than did virgin females. This behavior may be interpreted as an adaptive response to reduce mating costs.
机译：男性和女性的生殖兴趣在许多问题上可能会有所不同，包括交配的次数以及伴侣保护和同居的发生以及持续时间。蜘蛛剑角蝗（Eresidae）的交配系统的特征是一种特殊的性冲突，雄性通过杀婴诱使雌性交配。由于这种男性策略，女性要付出高昂的代价，而男性则受益。在交配季节，雄性倾向于与雌性呆几天。我们研究了这种男性同居策略是否对线虫女性也不利。一项野外实验表明，雄性在雌性巢穴中的存在对她的身体状况造成了负面影响，而同居的雄性则体重增加，因为它们以雌性网中捕获的猎物为食。作为回应，当男性在场时，女性没有更新自己的网。因此，与男性同居的雌性经历了猎物损失和可觅食时间损失的综合成本。预计每增加一个同居男性，这些费用就会增加。交配的女性对处女的行为要比处女的女性更为积极。此行为可以解释为一种自适应响应，以减少交配成本。

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