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タイトル: | Female Reproductive Seasonality and Male Influxes in Wild Mandrills (Mandrillus sphinx) |
著者: | Hongo, Shun ![]() ![]() ![]() Nakashima, Yoshihiro Akomo-Okoue, Etienne François Mindonga-Nguelet, Fred Loïque |
著者名の別形: | 本郷, 峻 |
キーワード: | Camera trap Moukalaba-Doudou Mating tactic Number of males Video analysis |
発行日: | Jun-2016 |
出版者: | Springer US |
誌名: | International Journal of Primatology |
巻: | 37 |
号: | 3 |
開始ページ: | 416 |
終了ページ: | 437 |
抄録: | 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. |
著作権等: | 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'. This is not the published version. Please cite only the published version. 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。 |
URI: | http://hdl.handle.net/2433/227216 |
DOI(出版社版): | 10.1007/s10764-016-9909-x |
出現コレクション: | 学術雑誌掲載論文等 |
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