Life history and environment predict variation in testosterone across vertebrates

Life history and environment predict variation in testosterone across vertebrates
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生活史和环境预测脊椎动物睾酮的变化

DOI:
10.1111/evo.14216
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发表时间:
2021
期刊:
影响因子:
3.3
通讯作者:
Knapp, Rosemary
Knapp, Rosemary
中科院分区:
环境科学与生态学2区
文献类型:
--
作者:
Husak, Jerry F.;Fuxjager, Matthew J.;Johnson, Michele A.;Vitousek, Maren N.;Donald, Jeremy W.;Francis, Clinton D.;Goymann, Wolfgang;Hau, Michaela;Kircher, Bonnie K.;Knapp, Rosemary

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内分泌系统是生物体与其环境之间的关键中介。这种相互作用导致激素水平的高度变异,但我们对影响主要脊椎动物群体内部和之间这种变异的生态因素知之甚少。我们通过评估各种社会和环境动态如何影响整个脊椎动物生命树的睾酮水平来研究这个主题。我们的分析表明,繁殖季节的长度和交配系统是最强的预测平均睾酮浓度,而繁殖季节的长度,环境温度和降水的变化是最强的预测种群内睾酮的变化。因此,小规模比较研究的原则强调交配机会和竞争对睾丸激素水平物种差异进化的重要性,可能适用于整个脊椎动物谱系。与此同时,气候因素与降雨和环境温度似乎影响血浆睾酮的变化,在一个给定的物种。因此,这些结果揭示了独特的生态因素如何差异地解释哺乳动物、鸟类、爬行动物、两栖动物和鱼类之间循环睾酮的变化尺度。
Endocrine systems act as key intermediaries between organisms and their environments. This interaction leads to high variability in hormone levels, but we know little about the ecological factors that influence this variation within and across major vertebrate groups. We study this topic by assessing how various social and environmental dynamics influence testosterone levels across the entire vertebrate tree of life. Our analyses show that breeding season length and mating system are the strongest predictors of average testosterone concentrations, whereas breeding season length, environmental temperature, and variability in precipitation are the strongest predictors of within-population variation in testosterone. Principles from small-scale comparative studies that stress the importance of mating opportunity and competition on the evolution of species differences in testosterone levels, therefore, likely apply to the entire vertebrate lineage. Meanwhile, climatic factors associated with rainfall and ambient temperature appear to influence variability in plasma testosterone, within a given species. These results, therefore, reveal how unique suites of ecological factors differentially explain scales of variation in circulating testosterone across mammals, birds, reptiles, amphibians, and fishes.
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