Female Callosobruchus maculatus can maximize long-term fitness through polyandry
Female Callosobruchus maculatus can maximize long-term fitness through polyandry
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雌性斑纹蝼蛄可以通过一妻多夫最大化长期健康
DOI：
10.1093/beheco/aru218
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发表时间：
2015
影响因子：
2.4
通讯作者：
J. L. Tomkins
中科院分区：
文献类型：
--
作者：
Carly J. Wilson;J. L. Tomkins
雌性经常与多个雄性交配，即使一次交配就足以使它们的卵子受精。再婚可以给女性带来直接和间接的好处，但这些好处与一妻多夫制的潜在成本相权衡。越来越多的人认识到，并非所有的男性在将精子运送到受精部位的能力上都是平等的。这种差异可能来自环境（例如，交配史）和内在（遗传）变异来源。大多数研究，调查女性健身控制男性交配历史，以克服这种影响，但这种控制可能会偏见的解释一妻多夫制的好处。在这里，我们试图避免高估一妻多夫制的好处，这可能是由于与处女男性反复交配而产生的。要做到这一点，我们量化了6个组成部分的健身女性豆象甲虫，Callosobruchus maculatus，交配1和4次之间的男性与未知的交配历史，无论是在隔离或与竞争对手的男性存在。随着交配次数的增加，繁殖力、后代产量和卵至成虫存活率下降。与这些短期成本相比，女性完全不育的概率在1次交配时最高，几何平均健身在3次交配后达到峰值。男性的骚扰并不影响女性的生产力。这种骚扰和交配次数对寿命的影响存在显著的交互作用，骚扰2 ~ 3次的雌性和单独交配2次的雌性死亡最快。我们的研究结果表明，女性可能会选择交配繁殖，尽管短期成本健身。
Females often mate with multiple males even when a single mating is sufficient to fertilize their eggs. Remating can lead to direct and indirect benefits for females, but these benefits trade-off against the potential costs associated with polyandry. There is a growing understanding that not all males are equal in their ability to deliver sperm to the site of fertilization. Such differences can arise both from environmental (e.g., mating history) and intrinsic (genetic) sources of variation. Most studies that investigate female fitness control male mating history to overcome such effects, but this control may bias interpretations of the benefits of polyandry. Here, we tried to avoid overestimating the benefits of polyandry that might accrue from mating repeatedly with virgin males. To do this, we quantified 6 components of fitness in female bruchid beetles, Callosobruchus maculatus, that were mated between 1 and 4 times to males with unknown mating histories, either in isolation or with rival males present. As copulation number increased, fecundity, offspring production, and egg-to-adult survival declined. In contrast to these short-term costs, the probability that a female remained completely infertile was highest at 1 copulation, and geometric mean fitness peaked after 3 copulations. Pericopulatory harassment by males did not affect female productivity. There was a significant interaction between this harassment and copulation number on longevity such that harassed females mating 2 or 3 times, and females mating twice in isolation, died soonest. Our results suggest that females may be selected to mate multiply despite short-term costs to fitness.
影响因子：
1.5
作者：
Gay, LaurEne;Eady, Paul E.;Tregenza, Tom
通讯作者：
Tregenza, Tom