2007年6月
Seasonal variation in fecal testosterone levels in free-ranging male Japanese Macaques
AMERICAN JOURNAL OF PRIMATOLOGY
- ,
- ,
- 巻
- 69
- 号
- 6
- 開始ページ
- 603
- 終了ページ
- 610
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1002/ajp.20366
- 出版者・発行元
- WILEY-LISS
Seasonal variation in fecal testosterone levels in free-ranging male Japanese macaques (Macaca fuscata) was examined with reference to their dominance rank and age class. Six adult (>= 7 years old, three higher-ranking and three lower-ranking) and four adolescent (5-6 years old, two higher-ranking and two lower-ranking) males were selected as target animals. Fecal samples of these males were collected during the first 3-5 days of each month and analyzed by the method developed by Barrett et al. [Primates 43:29-39, 2002b]. Testosterone levels varied significantly across the 12 months, and were highest in the early and middle parts of the mating season (i.e., October and November). Higher-ranking adult males displayed a peak testosterone level in October, whereas lower-ranking adults had no clear peak in the mating season. Such a difference in testosterone peaks in males could provide higher-ranking males more opportunities to fertilize females at first ovulation in the mating season than lower-ranking males.
- リンク情報
- ID情報
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- DOI : 10.1002/ajp.20366
- ISSN : 0275-2565
- eISSN : 1098-2345
- PubMed ID : 17245756
- Web of Science ID : WOS:000247075400001