Scaling Up Endocrine Disruption Effects from Individuals to Populations: Outcomes Depend on How Many Males a Population Needs
Scaling Up Endocrine Disruption Effects from Individuals to Populations: Outcomes Depend on How Many Males a Population Needs
复制标题
将内分泌干扰效应从个体扩大到人群：结果取决于人群需要多少男性
DOI：
10.1021/acs.est.6b05276
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发表时间：
2017
影响因子：
11.4
通讯作者：
Brander, Susanne M.
中科院分区：
文献类型：
--
作者：
White, J. Wilson;Cole, Bryan J.;Cherr, Gary N.;Connon, Richard E.;Brander, Susanne M.
评估内分泌干扰化合物（EDCs）如何影响种群动态需要分别跟踪男性和女性（以及性别逆转的个体）。任何性别特异性模型的一个关键组成部分是“交配功能”（性别比例和繁殖成功之间的关系），但这种关系在任何鱼类物种中都是未知的。使用一个模型，我们发现，EDC对鱼类种群的影响强烈依赖于形状的交配功能。此外，男性化通常比女性化对人口更有害。然后，我们量化的交配功能的内陆银汉鱼（Menidia beryllina），并使用这些结果和模型来评估野生银汉鱼种群的地位。相反的预期，一些男性可以产卵与许多女性，银鱼表现出几乎线性的交配功能。这意味着性别比例的微小变化会降低生殖成功率。五分之四的野生银汉鱼种群的性别比远远低于50：50，因此预计将经历人口下降。我们的研究结果表明，管理者应该更加重视减轻男性化，而不是女性化的EDC的影响。然而，对于具有接近线性交配功能的物种，如Menidia，雌性化和雄性化同样有害。
Assessing how endocrine disrupting compounds (EDCs) affect population dynamics requires tracking males and females (and sex-reversed individuals) separately. A key component in any sex-specific model is the “mating function” (the relationship between sex ratio and reproductive success) but this relationship is not known for any fish species. Using a model, we found that EDC effects on fish populations strongly depend upon the shape of the mating function. Additionally, masculinization is generally more detrimental to populations than feminization. We then quantified the mating function for the inland silverside (Menidia beryllina), and used those results and the model to assess the status of wild silverside populations. Contrary to the expectation that a few males can spawn with many females, silversides exhibited a nearly linear mating function. This implies that small changes in the sex ratio will reduce reproductive success. Four out of five wild silverside populations exhibited sex ratios far from 50:50 and thus are predicted to be experiencing population declines. Our results suggest that managers should place more emphasis on mitigating masculinizing rather than feminizing EDC effects. However, for species with a nearly linear mating function, such asMenidia, feminization and masculinization are equally detrimental.