Progesterone decreases sexual behavior in male Tibetan macaques (Macaca thibetana) at Huangshan, China

XIA Dongpo; LI Jinhua; Megan D. Matheson; SUN Lixing; SUN Binghua; ZHU Yong

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Progesterone decreases sexual behavior in male Tibetan macaques (Macaca thibetana) at Huangshan, China

XIA Dongpo 1,LI Jinhua 2 * #,Megan D. Matheson 3,SUN Lixing 4,SUN Binghua 5,ZHU Yong 6

1.School of Resources and Environmental Engineering, Anhui University & Anhui Key Laboratory for Eco-engineering and Bio-techniques, HeFei 230601

2.School of Resources and Environmental Engineering, Anhui University & Anhui Key Laboratory for Eco-engineering and Bio-techniques, Hefei, 230601

3. School of Life Science, Anhui Normal University, Wuhu, 241000

4.Department of Psychology, Central Washington University, Ellensburg, WA, USA 98926

5.Department of Biology, Central Washington University, Ellensburg, WA, USA 98926

6.Key Laboratory for Eco-engineering and Bio-techniques, Hefei, 230601

*Correspondence author

#Submitted by

Subject:

Funding: The United States National Institutes of Health （No.Grant RR-00166）, Talent Development Fund of Anhui Province, Program of University Innovation Team of Anhui Province （No.TD200703）, The International Science &Technology Cooperation Plan of Anhui Province （No.10080703034）, The National Natural Science Foundation of China （No.No. 3097041）, Specialized Research Fund for the Doctoral Program of Higher Education （No.200803570005）

Opened online:14 February 2012

Accepted by: none

Citation: XIA Dongpo,LI Jinhua,Megan D. Matheson.Progesterone decreases sexual behavior in male Tibetan macaques (Macaca thibetana) at Huangshan, China[OL]. [14 February 2012] http://en.paper.edu.cn/en_releasepaper/content/4463269

Previous studies have proposed that modulation by progesterone is fundamental to the regulation of sexual behavior in male mammals. Free-ranging Tibetan macaques (Macaca thibetana) provide a case to test this hypothesis in non-human primates living in a natural environment. This study spanned from October 2005 to September 2006, including the seven months of the mating season (153 days) and five months of the non-mating season (150 days). A total of 426 fecal samples and approximately 453h of behavioral data were collected from the five target males, to study the physiological effect of progesterone on both group and individual levels. On the group level, progesterone levels varied seasonally during the study period. They were negatively correlated with testosterone, copulatory behavior, and sexually motivated behaviors as well. On the individual level, however, progesterone levels varied seasonally only in high-ranking monkeys, but not in low-ranking individuals. Negative correlations were also found between progesterone and testosterone levels, and sexually motivated behaviors in high-ranking monkeys, but not in low-rankings. Copulatory behaviors were not negatively correlated with progesterone levels in the five target monkeys consistently. Our results suggest that progesterone levels only regulate testosterone levels and sexually motivated behaviors in high-ranking monkeys. This study sheds light on the physiological function of progesterone on sexual behaviors in free-ranging male non-human primates, and also provides insight into reducing the sexual urges or sexual crime by progesterone treatment in male humans.

Keywords:Zoology; Tibetan macaques (Macaca thibetana); Male; Progesterone; Testosterone; Sexual behavior

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