Female fitness consequences of male harassment and copulation in seed beetles, Callosobruchus maculatus
Female fitness consequences of male harassment and copulation in seed beetles, Callosobruchus maculatus
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DOI：
10.1016/j.anbehav.2009.06.036
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发表时间：
2009-11-01
期刊：
影响因子：
2.5
通讯作者：
Gwynne, Darryl T.
中科院分区：
文献类型：
--
作者：
den Hollander, Michelle;Gwynne, Darryl T.
尽管有广泛的证据表明一夫多妻制的好处，但对于雌性来说，每次交配都有相关的成本，对于许多物种来说，额外交配的成本是否大于好处还是个未知数。在斑纹瓢虫(鞘翅目：叶甲科：布氏甲亚科)中，成本可能来自雄性在交配过程中的骚扰或雌性在交配过程中遭受的伤害。交配的好处可能来自射精液中转移的营养物质或水。如果交配总体上是昂贵的，雄性的存在(性骚扰)和多次交配预计会降低雌性的适合度。雌性与不同数量的雄性(1-4只)和不同的交配机会。当雌性都受到不止一只雄性的骚扰并可以与之重新交配时，它们的终生繁殖率较低，寿命比单性雌性短。这些结果表明，当雌性持续接触多只雄性时，多次交配的直接好处并不能补偿成本。(C)2009年，动物行为研究协会。爱思唯尔有限公司出版。保留所有权利。
Despite widespread evidence for the benefits of polyandry, there are costs associated with each mating for females, and for many species, it is unknown whether the costs of extra matings outweigh the benefits. In the seed beetle Callosobruchus maculatus (Coleoptera: Chrysomelidae: Bruchinae), costs might come from male harassment during mating attempts or from injuries that females sustain during copulation. Benefits of mating might come from nutrients or water transferred in the ejaculate. If mating is costly overall, male presence ( sexual harassment) and multiple mating in C. maculatus is expected to reduce female fitness. Females were housed with differing numbers of males (1-4) and differing opportunities for copulation. When females were both harassed by and could remate with more than one male, they had lower lifetime reproductive rates and reduced life span relative to monandrous females. These results indicate that when females are continually exposed to multiple males, the direct benefits of multiple mating do not compensate for the costs. (C) 2009 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All rights reserved.