Sexual Selection and Life History: Earlier Recalled Puberty Predicts Men's Phenotypic Masculinization
Sexual Selection and Life History: Earlier Recalled Puberty Predicts Men's Phenotypic Masculinization
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DOI：
10.1007/s40750-015-0031-7
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发表时间：
2016-06-01
影响因子：
1.6
通讯作者：
Puts, David A.
中科院分区：
文献类型：
--
作者：
Doll, Leslie M.;Cardenas, Rodrigo A.;Puts, David A.
在一些实验室啮齿动物中，雄性的大脑和行为在青春期前后的时间窗内对雄激素的组织效应变得不那么敏感。人类男性的青春期较晚也与较少的男性典型心理和行为有关，例如心理旋转任务的表现较低，药物滥用和犯罪的风险较低。在这里，我们建议，生活史（LH）理论提供了一个有用的理论框架，了解青春期的时间和表型男性化之间的关系。由于更快的男性LH策略强调交配超过养育，青春期提前可能会导致更普遍的男性化特征，增加在青春期的性二型性和功能在交配竞争。换句话说，我们认为，降低对雄激素的敏感性是一种近似的机制，有利于快速LH策略男性交配相关适应的发展。我们在153名男性中测试了这一假设。与我们的假设相一致，较早回忆青春期的时间预测更大的成年男性体重指数，面部优势，二头肌周长，并在较小的程度上，系统化和心理旋转能力。在我们的数据中，一些与青春期时间无关的性二态特征可能与我们男性祖先的交配成功相关性较小，因此与快速LH策略相关性较小。
In some laboratory rodents, males' brains and behavior become less sensitive to the organizing effects of androgens across the time window surrounding puberty. Later puberty in human males has also been associated with less male-typical psychology and behavior, such as lower performance on mental rotation tasks and lower risk of substance abuse and delinquency. Here, we propose that life history (LH) theory provides a useful theoretical framework for understanding such relationships between pubertal timing and phenotypic masculinization. Because a faster male LH strategy emphasizes mating over parenting, earlier puberty may lead more generally to greater masculinization of traits that increase in sexual dimorphism at puberty and function in mating competition. In other words, we suggest that decreasing sensitivity to androgens represents a proximate mechanism that facilitates the development of mating-related adaptations in men with fast LH strategies. We tested this hypothesis in 153 men. Consistent with our hypothesis, earlier recalled pubertal timing predicted greater adult male body mass index, facial dominance, biceps circumference, and, to a lesser degree, systemizing and mental rotation ability. Some sexually dimorphic traits that were unrelated to pubertal timing in our data may have been less relevant to our male ancestors' mating success and hence to a fast LH strategy.