DOMINANCE RANK, CORTISOL CONCENTRATIONS, AND REPRODUCTIVE MATURATION IN MALE RHESUS MACAQUES
DOMINANCE RANK, CORTISOL CONCENTRATIONS, AND REPRODUCTIVE MATURATION IN MALE RHESUS MACAQUES
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DOI：
10.1016/0031-9384(95)00055-n
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发表时间：
1995-08-01
影响因子：
2.9
通讯作者：
CLARKE, AS
中科院分区：
文献类型：
--
作者：
BERCOVITCH, FB;CLARKE, AS
在青春期雄性恒河猴中，队列中排名最高的个体猕猴，比排名较低的同种猕猴在更年轻的年龄、交配季节更早、持续时间更长的时候，睾酮浓度更高。我们试图确定这种等级相关的生殖成熟模式是否可能是糖皮质激素水平差异的函数。一项为期两年的纵向研究对一群生活在一英亩户外围栏中的异性恋青少年男性进行了研究，结果显示，高地位和低地位男性之间的皮质醇浓度没有差异。无论是青春期还是成年男性，皮质醇与睾酮都没有负相关。年轻的青春期男性的皮质醇水平与成熟一致，而年长的青春期男性的皮质醇水平与成年男性的皮质醇水平相当。级别较低的男性往往会有更多随时间变化的皮质醇浓度。我们得出结论，皮质醇浓度不是优势地位的函数，雄性猕猴生殖成熟的时间与皮质醇浓度无关。
Among adolescent male rhesus macaques, Macaca mulatta, the highest ranking individual within a cohort has higher testosterone concentrations at a younger age, earlier in the mating season, and for a longer duration than his lower ranking conspecifics. We sought to determine whether such a rank-related pattern of reproductive maturation could be a function of differences in glucocorticoid levels. A 2-yr longitudinal study of a cohort of adolescent males living in a heterosexual group in a one acre outdoor enclosure revealed no differences in cortisol concentrations between high and low status males. Cortisol was not inversely correlated with testosterone in either adolescent or adult males. Young pubescent males had increases in cortisol levels coincident with maturation, while older adolescent males had cortisol concentrations comparable to those of adult males. Low ranking males tended to have more variable cortisol concentrations across time. We conclude that cortisol concentrations are not a function of dominance status and that the timing of reproductive maturation in male rhesus macaques is independent of cortisol concentrations.