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s10329-020-00856-9.pdf | 1.02 MB | Adobe PDF | 見る/開く |
タイトル: | Chimpanzee Kanako |
著者: | Hirata, Satoshi https://orcid.org/0000-0002-1026-6270 (unconfirmed) |
著者名の別形: | 平田, 聡 |
発行日: | Sep-2020 |
出版者: | Springer Nature |
誌名: | Primates |
巻: | 61 |
号: | 5 |
開始ページ: | 635 |
終了ページ: | 638 |
抄録: | Chimpanzee societies generally show male philopatry and female dispersal. However, demographic data on wild chimpanzee societies from long-term study sites have revealed that some females give birth in their natal group (i.e., “remaining females”). Here, we report two remaining females in the M group in Mahale, Tanzania, and compare their cases with previous reports to explore the social and ecological factors that lead to females remaining in their natal group. The results revealed that neither the social traits of the remaining females nor the ecological factors they experienced showed a coherent trend. However, we found multiple, non-mutually exclusive potential factors that may infuence the decision by females to remain in their natal group: a decrease in indirect feeding competition, support from mothers or allomothers in the care of ofspring and in aggressive interactions with other individuals, close relationships with the other remaining females, and a short adolescent infertility period. Additionally, we observed a natal female copulating with her older brother, which was the frst observation of brother–sister incest in Mahale. Although DNA analysis revealed that her infant was not a product of inbreeding, the pair copulated frequently in the latter half of her estrus period, suggesting that they did not avoid incest behaviorally to avoid inbreeding. Furthermore, there was no hard evidence that the remaining female avoided mating with her maternal brother, suggesting that incest avoidance may not be a proximate factor responsible for female dispersal. |
著作権等: | This is a post-peer-review, pre-copyedit version of an article published in Primates. The final authenticated version is available online at: https://doi.org/10.1007/s10329-020-00856-9. The full-text file will be made open to the public on 25 August 2021 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/2433/265280 |
DOI(出版社版): | 10.1007/s10329-020-00856-9 |
PubMed ID: | 32844335 |
出現コレクション: | 学術雑誌掲載論文等 |
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