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Title: Female Reproductive Seasonality and Male Influxes in Wild Mandrills (Mandrillus sphinx)
Authors: Hongo, Shun  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0001-8167-1348 (unconfirmed)
Nakashima, Yoshihiro
Akomo-Okoue, Etienne François
Mindonga-Nguelet, Fred Loïque
Author's alias: 本郷, 峻
Keywords: Camera trap
Moukalaba-Doudou
Mating tactic
Number of males
Video analysis
Issue Date: Jun-2016
Publisher: Springer US
Journal title: International Journal of Primatology
Volume: 37
Issue: 3
Start page: 416
End page: 437
Abstract: The correlates of variation in the number of males in primate groups form a long-standing question in primatology. We investigated female reproductive seasonality and the numbers of males in groups of wild mandrills (Mandrillus sphinx) in a 25-month camera-trap survey with 160 camera locations in Moukalaba-Doudou National Park, Gabon. We used 1760 videos to analyze group composition, including the presence of females with newborn infants and with sexual swellings, the number of males present in groups, and male spatial positioning in groups. Female reproduction was seasonal, with a peak in the number of newborns in the mid-rainy season and a peak in the number of females with sexual swellings in the early dry season. The number of males in the group increased in the dry season, with a much greater increase in the number of mature males (sevenfold) than in submature males (twofold). The peak number of mature males, but not submature males, in the group lagged significantly behind the peak in the number of females with sexual swellings, suggesting that submature males enter groups before mature males and/or that mature males stay in the group longer after the peak of females with sexual swellings. Mature, but not submature, males appeared frequently near females with sexual swellings. In conclusion, we found a clear relationship between the presence of receptive females and the number of males in the group, and evidence that male competitive ability influences male strategies.
Rights: The final publication is available at Springer via https://doi.org/10.1007/s10764-016-9909-x.
The full-text file will be made open to the public on 01 June 2017 in accordance with publisher's 'Terms and Conditions for Self-Archiving'.
この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
This is not the published version. Please cite only the published version.
URI: http://hdl.handle.net/2433/227216
DOI(Published Version): 10.1007/s10764-016-9909-x
Appears in Collections:Journal Articles

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