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タイトル: | Trigger of twin‐fights in captive common marmosets |
著者: | Miwa, Miki Hamazaki, Yusuke Koda, Hiroki Nakamura, Katsuki |
著者名の別形: | 三輪, 美樹 濱嵜, 裕介 香田, 啓貴 中村, 克樹 |
キーワード: | birth control common marmoset interbirth-interval twin-fight |
発行日: | Sep-2023 |
出版者: | Wiley |
誌名: | American Journal of Primatology |
巻: | 85 |
号: | 9 |
論文番号: | e23528 |
抄録: | Common marmosets usually give birth to twins and form a social group consisting of a breeding couple and pairs of same-aged siblings. The twins may engage in the first agonistic fights between them, twin-fights (TFs), during adolescence. This study investigated the TFs based on records accumulated in our captive colony over 12 years to elucidate the proximate causations that trigger the TFs. We aimed to determine whether the TF onset mainly depended on internal events (such as the onset of puberty) as previously suggested or external events (such as the birth of the younger siblings and the behavioral change of the group members). Although both events usually occur simultaneously, the birth control method (i.e., manipulation of ovulation and interbirth-intervals by prostaglandin administration to females) could temporally separate these events. A comparison of the onset day and occurrence rate with or without the birth control procedure revealed that TFs were triggered by a combination of internal and external events, that is, external events were the predominant triggers of TF, under the influence of internal events. The timing of TF onset was significantly delayed when the birth of the younger siblings was delayed and the twins grew older under the birth-controlled condition, suggesting that the birth of younger siblings and related behavioral changes of group members, as well as twins' developmental maturation, could trigger TF. Higher TF rates between same-sex twins were consistent with previous studies, reflecting the characteristics of same-sex directed aggression in callitrichines. |
著作権等: | © 2023 The Authors. American Journal of Primatology published by Wiley Periodicals LLC. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made. |
URI: | http://hdl.handle.net/2433/286190 |
DOI(出版社版): | 10.1002/ajp.23528 |
PubMed ID: | 37301733 |
出現コレクション: | 学術雑誌掲載論文等 |
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