Testosterone related to age and life-history stages in male baboons and geladas.
Testosterone related to age and life-history stages in male baboons and geladas.
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DOI：
10.1016/j.yhbeh.2009.08.005
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发表时间：
2009-10
影响因子：
3.5
通讯作者：
Altmann J
中科院分区：
文献类型：
--
作者：
Beehner JC;Gesquiere L;Seyfarth RM;Cheney DL;Alberts SC;Altmann J
尽管我们对睾酮如何介导生活史权衡的认识取得了重大进展，但这项研究主要集中在季节性物种上。我们对非季节性繁殖物种的睾酮和生活史阶段之间的关系知之甚少。在这里，我们检查了三种非季节性繁殖灵长类动物的雄性在整个生命周期中的睾酮水平：黄狒狒（Papio cynocephalus 或 P. hamadryas cynocephalus）、美洲狒狒（Papio ursinus 或 P. h. ursinus）和狒狒（Theropithecus gelada）。首先，我们预测睾酮谱将跟踪每个分类单元在各自繁殖年份的生殖谱。其次，我们评估与年龄相关的睾酮变化，以确定一些生活史转变是否与这些变化相关。受试者包括来自每个分类群野生种群的雄性（> 2.5 岁），我们从中获取粪便样本以进行激素测定。尽管不同物种的睾酮水平大致相似，但在两个主要变化的时间上发现了相当大的差异：（1）达到成人睾酮水平，以及（2）在最大生产期后睾酮水平下降。与黄色狒狒和狒狒相比，美洲羚羊达到成年睾酮水平的时间延迟了一年。至于睾酮的下降，狒狒和查克玛在达到最高产量三年后表现出显着下降，而黄色则逐渐下降，以至于没有检测到显着的年度下降。对于黄种人和查克玛人来说，睾丸激素产生的增加先于社会统治地位的提升。我们在这些类群表现出的生态和行为差异的背景下讨论这些差异。
Despite significant advances in our knowledge of how testosterone mediates life-history trade-offs, this research has primarily focused on seasonal species. We know comparatively little about the relationship between testosterone and life-history stages for non-seasonally breeding species. Here we examine testosterone profiles across the lifespan of males from three non-seasonally breeding primates: yellow baboons (Papio cynocephalus or P. hamadryas cynocephalus), chacma baboons (Papio ursinus or P. h. ursinus), and geladas (Theropithecus gelada). First, we predict that testosterone profiles will track the reproductive profiles of each taxon across their respective breeding years. Second, we evaluate age-related changes in testosterone to determine whether several life-history transitions are associated with these changes. Subjects include males (>2.5 years) from wild populations of each taxon from whom we had fecal samples for hormone determination. Although testosterone profiles across species were broadly similar, considerable variability was found in the timing of two major changes: (1) the attainment of adult levels of testosterone, and (2) the decline in testosterone after the period of maximum production. Attainment of adult testosterone levels was delayed by one year in chacmas compared with yellows and geladas. With respect to the decline in testosterone, geladas and chacmas exhibited a significant drop after three years of maximum production, while yellows declined so gradually that no significant annual drop was ever detected. For both yellows and chacmas, increases in testosterone production preceded elevations in social dominance rank. We discuss these differences in the context of ecological and behavioral differences exhibited by these taxa.
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影响因子：
2.5
作者：
Alberts, SC;Watts, HE;Altmann, J
通讯作者：
Altmann, J
影响因子：
2.5
作者：
Alberts, SC;Altmann, J;Wilson, ML
通讯作者：
Wilson, ML
影响因子：
64.8
作者：
Buchan, JC;Alberts, SC;Altmann, J
通讯作者：
Altmann, J
影响因子：
56.9
作者：
BUSSE, C;HAMILTON, WJ
通讯作者：
HAMILTON, WJ
影响因子：
2.4
作者：
CASTRACANE, VD;COPELAND, KC;KUEHL, TJ
通讯作者：
KUEHL, TJ