The ontogeny of sexual dimorphism in free-ranging rhesus macaques.
The ontogeny of sexual dimorphism in free-ranging rhesus macaques.
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DOI：
10.1002/ajpa.24442
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发表时间：
2022-03
期刊：
影响因子：
--
通讯作者：
Higham, James P.
中科院分区：
文献类型：
--
作者：
Turcotte, Cassandra M.;Mann, Eva H. J.;Stock, Michala K.;Villamil, Catalina, I;Montague, Michael J.;Dickinson, Edwin;Surratt, Samuel Bauman;Martinez, Melween;Williams, Scott A.;Anton, Susan C.;Higham, James P.
只有通过了解形态、性选择压力和现存物种的社会行为之间的相互作用，才有可能重建灭绝灵长类动物的社会生活。体细胞性二型性是灵长类进化中的一个重要变量，部分原因是性选择的强度和机制与二型性的程度之间存在明显的关系。在这里，我们研究了雄性和雌性猕猴个体发育中的体型二型性，以评估它主要是通过一夫多妻制交配系统预测的双性生殖实现的，还是更快的雄性生长表明一夫多妻制，或者两者兼而有之。我们测量了来自波多黎各Cayo Santiago的364只自由放养恒河猴的横断面样本的体质量，以研究体型二型性：1)跨越寿命；2)作为性别特定增长策略的结果，包括：a)成熟年龄；b)生长速度；以及c)总生长持续时间，使用符合性别特定发育曲线的回归模型。在繁殖期观察到显著的体型二型性，雄性体型是雌性的1.51倍。雄性体型较大是由于成熟年龄较晚(雄性6.8-7.8岁，雌性5.5-6.5岁；Logistic模型)和在黄金前期(黄土模型)生长速度较快所致。虽然雄性的体型总体上变得更大，但雌性在衰老前保持成年体型的时间更长(二次模型)。猕猴体型二态的个体发育是通过双性生殖和较快的雄性生长速度实现的。我们的结果为理解灵长类二型性的发展和复杂性提供了新的数据。
Reconstructing the social lives of extinct primates is possible only through an understanding of the interplay between morphology, sexual selection pressures, and social behavior in extant species. Somatic sexual dimorphism is an important variable in primate evolution, in part because of the clear relationship between the strength and mechanisms of sexual selection and the degree of dimorphism. Here, we examine body size dimorphism across ontogeny in male and female rhesus macaques to assess whether it is primarily achieved via bimaturism as predicted by a polygynandrous mating system, faster male growth indicating polygyny, or both. We measured body mass in a cross-sectional sample of 364 free-ranging rhesus macaques from Cayo Santiago, Puerto Rico to investigate size dimorphism: 1) across the lifespan; and 2) as an outcome of sex-specific growth strategies, including: a) age of maturation; b) growth rate; and c) total growth duration, using regression models fit to sex-specific developmental curves. Significant body size dimorphism was observed by prime reproductive age with males 1.51 times the size of females. Larger male size resulted from a later age of maturation (males: 6.8–7.8 years versus females: 5.5–6.5 years; logistic model) and elevated growth velocity through the pre-prime period (LOESS model). Though males grew to larger sizes overall, females maintained adult size for longer before senescence (quadratic model). The ontogeny of size dimorphism in rhesus macaques is achieved by bimaturism and a faster male growth rate. Our results provide new data for understanding the development and complexities of primate dimorphism.
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影响因子：
--
作者：
Bercovitch, FB;Widdig, A;Krawczak, M
通讯作者：
Krawczak, M
影响因子：
2.8
作者：
Galbany, Jordi;Abavandimwe, Didier;McFarlin, Shannon C.
通讯作者：
McFarlin, Shannon C.
影响因子：
3.7
作者：
CLEVELAND, WS;DEVLIN, SJ
通讯作者：
DEVLIN, SJ
DOI：
10.1073/pnas.79.2.209
发表时间：
1982-01-01
期刊：
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA-BIOLOGICAL SCIENCES
影响因子：
--
作者：
KAY, RF
通讯作者：
KAY, RF
影响因子：
2.5
作者：
Gordon, AD
通讯作者：
Gordon, AD