2014 Fiscal Year Final Research Report
Estrous synchrony and evolution of mating system in primates
| Project/Area Number |
23405016
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 海外学術 |
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| Research Field |
Physical anthropology
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| Research Institution | University of the Ryukyus |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
KAWAMURA Shouji 東京大学, 新領域創成科学研究科, 教授 (40282727)
IHARA Yasuo 東京大学, 大学院理学系研究科, 講師 (90376533)
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| Project Period (FY) |
2011-04-01 – 2015-03-31
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| Keywords | 配偶者選択 / アヌビスヒヒ / 発情同期／さけあい |
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| Outline of Final Research Achievements |
Synchronous and asynchronous mating periods are widely observed in both the plant and animal kingdoms, and females may use this phenomenon as a reproductive strategy. It is prospected that females asynchronize estrus and choose mates strictly because paternal investment is of minor contribution for survival of offspring in anubis baboons.
The purpose of this study was to clarify whether females of anubis baboons show estrous asynchrony, and to figure out what is behind estrous asynchrony. We developed a novel index and utilized a randomization procedure to analyze estrous synchrony in plural groups of baboons living in the Gombe Stream National Park, Tanzania. Contrary to our prediction, female estrous days overlapped randomly. Therefore it is thought that mate competition among males was less severe. The higher ranking males (alpha and beta males) had sired almost a half of infants.
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| Free Research Field |
Biological anthoropology
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