The hidden ageing costs of sperm competition.,Ecology Letters

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The hidden ageing costs of sperm competition.
Ecology Letters ( IF 7.6 ) Pub Date : 2020-09-09 , DOI: 10.1111/ele.13593
Jean-François Lemaître ₁ , Jean-Michel Gaillard ₁ , Steven A Ramm ₂

Affiliation

Ageing and sexual selection are intimately linked. There is by now compelling evidence from studies performed across diverse organisms that males allocating resources to mating competition incur substantial physiological costs, ultimately increasing ageing. However, although insightful, we argue here that to date these studies cover only part of the relationship linking sexual selection and ageing. Crucially, allocation to traits important in post‐copulatory sexual selection, that is sperm competition, has been largely ignored. As we demonstrate, such allocation could potentially explain much diversity in male and female ageing patterns observed both within and among species. We first review how allocation to sperm competition traits such as sperm and seminal fluid production depends on the quality of resources available to males and can be associated with a wide range of deleterious effects affecting both somatic tissues and the germline, and thus modulate ageing in both survival and reproductive terms. We further hypothesise that common biological features such as plasticity, prudent sperm allocation and seasonality of ejaculate traits might have evolved as counter‐adaptations to limit the ageing costs of sperm competition. Finally, we discuss the implications of these emerging ageing costs of sperm competition for current research on the evolutionary ecology of ageing.

中文翻译：

精子竞争的隐性衰老成本。

衰老和性选择密切相关。到现在为止，来自对各种生物进行的研究的令人信服的证据表明，雄性将资源分配到交配竞争中会招致大量的生理损失，最终导致衰老。然而，尽管有见识，但我们在这里辩称，迄今为止，这些研究仅涵盖了将性选择和年龄联系起来的部分关系。至关重要的是，很大程度上忽略了交配后性选择中重要的性状（即精子竞争）的分配。正如我们证明的那样，这种分配可能解释了物种内和物种间观察到的男性和女性衰老模式的多样性。我们首先回顾分配给精子竞争性状（例如精子和精液生产）的方式如何取决于男性可用资源的质量，并且可以与影响体细胞组织和种系的多种有害影响相关联，从而调节二者的衰老生存和生殖条件。我们进一步假设，常见的生物学特征，例如可塑性，审慎的精子分配和射精性状的季节性可能已经演变为对付限制精子竞争老化成本的反适应手段。最后，我们讨论了精子竞争的这些新出现的老化成本对当前关于老化进化生态学的研究的意义。从而在生存和生殖方面调节衰老。我们进一步假设，常见的生物学特征，例如可塑性，审慎的精子分配和射精性状的季节性可能已经演变为对付限制精子竞争老化成本的反适应手段。最后，我们讨论了精子竞争的这些新出现的老化成本对老化进化生态学当前研究的意义。从而在生存和生殖方面调节衰老。我们进一步假设，常见的生物学特征，例如可塑性，审慎的精子分配和射精性状的季节性可能已经演变为对付限制精子竞争老化成本的反适应手段。最后，我们讨论了精子竞争的这些新出现的老化成本对老化进化生态学当前研究的意义。

更新日期：2020-10-19

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