Endocrinology of year-round reproduction in a highly seasonal habitat: environmental variability in testosterone and glucocorticoids in baboon males.
Endocrinology of year-round reproduction in a highly seasonal habitat: environmental variability in testosterone and glucocorticoids in baboon males.
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DOI：
10.1002/ajpa.21374
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发表时间：
2011-02
影响因子：
2.8
通讯作者：
Altmann, Jeanne
中科院分区：
文献类型：
--
作者：
Gesquiere, Laurence R.;Onyango, Patrick O.;Alberts, Susan C.;Altmann, Jeanne
在能量受限的情况下，例如在粮食供应不足的时期，可能需要在繁殖和自我维持之间进行一些权衡；即使是全年饲养者也可能被迫表现出一定的繁殖季节性。先前的研究主要集中在女性生殖和生理学方面，很少有研究评估环境因素对男性的影响。在这里，我们评估了季节和环境温度对肯尼亚安博塞利雄性狒狒粪便糖皮质激素（fGC）和睾酮（fT）水平的影响。安博塞利盆地是一个极具挑战性的半干旱热带栖息地，其特点是降雨季节性强，环境温度高。我们之前报道过雌性狒狒受到这些具有挑战性的环境条件的影响。我们在这里询问雄性狒狒在与雌性相同的环境和群体中是否表现出相似的生理效应。我们发现，考虑到雄性年龄和个体差异后，雄性在旱季表现出比雨季更高的 fGC 水平和更低的 fT 水平。此外，在日均最高气温较高的月份中，fT 水平较低，但 fGC 水平较低，这表明高温对睾丸有直接影响。我们的研究结果表明，雄性狒狒和雌性狒狒一样，都会经历生态压力，从而改变其生殖生理机能。环境对男性生殖的影响本身就值得更多关注，因为男性生理机能的改变可能导致在挑战性环境中观察到的女性生育力下降。
In conditions characterized by energetic constraints, such as in periods of low food availability, some trade-offs between reproduction and self-maintenance may be necessary; even year-round breeders may then be forced to exhibit some reproductive seasonality. Prior research has largely focused on female reproduction and physiology, and few studies have evaluated the impact of environmental factors on males. Here we assessed the effects of season and ambient temperatures on fecal glucocorticoid (fGC) and testosterone (fT) levels in male baboons in Amboseli, Kenya. The Amboseli basin is a highly challenging, semi-arid tropical habitat that is characterized by strongly seasonal patterns of rainfall and by high ambient temperatures. We previously reported that female baboons were impacted by these challenging environmental conditions. We ask here whether male baboons in the same environment and groups as females exhibit similar physiological effects. We found that after accounting for male age and individual variability, males exhibited higher fGC levels and lower fT levels during the dry season than during the wet season. Furthermore, fT but not fGC levels were lower in months of high average daily maximum temperatures, suggesting a direct impact of heat on testes. Our results demonstrate that male baboons, like females, experience ecological stress that alters their reproductive physiology. The impact of the environment on male reproduction deserves more attention both in its own right and because alteration in male physiology may contribute to the reduction in female fertility observed in challenging environments.
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影响因子：
2.4
作者：
Beehner, Jacinta C.;Onderdonk, Daphne A.;Altmann, Jeanne
通讯作者：
Altmann, Jeanne
影响因子：
3.5
作者：
Beehner JC;Gesquiere L;Seyfarth RM;Cheney DL;Alberts SC;Altmann J
通讯作者：
Altmann J
影响因子：
2.9
作者：
ALBERTS, SC;ALTMANN, J
通讯作者：
ALTMANN, J
DOI：
10.1017/cbo9780511542343.007
发表时间：
2005-01-01
期刊：
SEASONALITY IN PRIMATES: STUDIES OF LIVING AND EXTINCT HUMAN AND NON-HUMAN PRIMATES
影响因子：
--
作者：
Alberts, Susan C.;Hollister-Smith, Julie A.;Altmann, Jeanne
通讯作者：
Altmann, Jeanne
影响因子：
3.5
作者：
Bales, KL;French, JA;Dietz, JM
通讯作者：
Dietz, JM