Impaired sperm quality, delayed mating but no costs for offspring fitness in crickets winning a fight
Impaired sperm quality, delayed mating but no costs for offspring fitness in crickets winning a fight
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精子质量受损，交配延迟，但蟋蟀在战斗中获胜却不会影响后代的健康
DOI：
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发表时间：
2016
影响因子：
2.1
通讯作者：
C. Gasparini
中科院分区：
文献类型：
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作者：
C. Tuni;J. P. Ferreira;Y. Fritz;A. M. Meneses;C. Gasparini
公-公竞争的结果是已知的，影响男性交配成功，并被认为是赋予健身的好处，女性通过偏好占主导地位的男性。然而，通过与比赛获胜者交配，雌性可能会产生重大的成本，从降低繁殖力到对后代的负面影响。因此，确定男性主导女性健身的成本和收益对于揭示两性之间潜在的利益冲突至关重要。在这里，我们调查了男性的交配前和交配后的生殖投资及其对女性健身后，一个单一的比赛一个使用领域蟋蟀双斑蟋蟀。我们允许雄性进行战斗，并立即测量它们的交配行为，精子质量和后代的生存能力。我们发现，男性经历了战斗，独立的结果，延迟交配，但他们的求爱努力没有受到影响。然而，与失败者和没有经历过战斗的男性相比，胜利者产生的精子质量较低（活力）。结果表明，在交配前和交配后的性选择事件之间的资源分配的权衡。尽管较低的射精质量，我们发现没有健身成本（繁殖力和后代的生存能力）的女性交配的赢家。总的来说，我们的研究结果强调了在评估男性生殖成功时考虑战斗能力的重要性，因为获胜者在交配后的竞争力可能会受损。
The outcome of male–male contest competition is known to affect male mating success and is believed to confer fitness benefits to females through preference for dominant males. However, by mating with contest winners, females can incur significant costs spanning from decreased fecundity to negative effects on offspring. Hence, identifying costs and benefits of male dominance on female fitness is crucial to unravel the potential for a conflict of interests between the sexes. Here, we investigated males' pre‐ and post‐copulatory reproductive investment and its effect on female fitness after a single contest a using the field cricket Gryllus bimaculatus. We allowed males to fight and immediately measured their mating behaviour, sperm quality and offspring viability. We found that males experiencing a fight, independently of the outcome, delayed matings, but their courtship effort was not affected. However, winners produced sperm of lower quality (viability) compared to losers and to males that did not experience fighting. Results suggest a trade‐off in resource allocation between pre‐ and post‐mating episodes of sexual selection. Despite lower ejaculate quality, we found no fitness costs (fecundity and viability of offspring) for females mated to winners. Overall, our findings highlight the importance of considering fighting ability when assessing male reproductive success, as winners may be impaired in their competitiveness at a post‐mating level.
影响因子：
1.9
作者：
Trainor, Brian C.;Workman, Joanna L.;Nelson, Randy J.
通讯作者：
Nelson, Randy J.