Personality Traits in Rhesus Macaques (Macaca mulatta) Are Heritable but Do Not Predict Reproductive Output
Personality Traits in Rhesus Macaques (Macaca mulatta) Are Heritable but Do Not Predict Reproductive Output
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DOI：
10.1007/s10764-013-9724-6
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发表时间：
2014-02-01
影响因子：
2.5
通讯作者：
Platt, Michael L.
中科院分区：
文献类型：
--
作者：
Brent, Lauren J. N.;Semple, Stuart;Platt, Michael L.
越来越多的证据表明，动物的行为倾向或“个性”是其生物学的一个重要方面，但人们对其进化基础知之甚少。具体来说，人格的个体差异是如何产生的，并随后通过选择得以维持，目前尚不清楚。为了解决这一差距，人格研究需要明确地结合遗传信息。在这里，我们通过确定人格成分的遗传性和检查这些成分的适应性结果来探索恒河猴人格的遗传基础。我们通过集中动物抽样收集了108只生活在自由放养种群中三个社会群体的成年雌性的观察数据。我们将主成分分析应用于九种自发发生的行为，并确定了六种假定的人格成分，我们将其命名为温顺、大胆、进取、被动、孤独和紧张。所有成分均具有可重复性和可遗传性，遗传率估计范围为0.14 ~ 0.35。我们没有发现任何证据表明个性成分与生殖产出有关，无论是通过婴儿存活率还是通过生育间隔来衡量。这一发现表明，在这一人群中，要么性格对健康没有影响，要么自然选择减少了与健康相关的性格变化。
There is growing evidence that behavioral tendencies, or "personalities," in animals are an important aspect of their biology, yet their evolutionary basis is poorly understood. Specifically, how individual variation in personality arises and is subsequently maintained by selection remains unclear. To address this gap, studies of personality require explicit incorporation of genetic information. Here, we explored the genetic basis of personality in rhesus macaques by determining the heritability of personality components and by examining the fitness consequences of those components. We collected observational data for 108 adult females living in three social groups in a free-ranging population via focal animal sampling. We applied principal component analysis to nine spontaneously occurring behaviors and identified six putative personality components, which we named Meek, Bold, Aggressive, Passive, Loner, and Nervous. All components were repeatable and heritable, with heritability estimates ranging from 0.14 to 0.35. We found no evidence of an association with reproductive output, measured either by infant survival or by interbirth interval, for any of the personality components. This finding suggests either that personality does not have fitness-related consequences in this population or that selection has acted to reduce fitness-associated variation in personality.