多雄の霊長類社会における真の父親のケア
Jason C Buchan1, Susan C Alberts, Joan B Silk
1Department of Biology, Duke University, Box 90338, Durham, North Carolina 27708, USA.
Nature
|September 12, 2003
まとめ
オスのバビオンは,紛争中の自分の子孫を選択的に支援することによって,親のケアを提供します. ランク獲得と保護の支援を含むこの行動は,サバンナ・パビオン (Papio cynocephalus) に本当の父親の投資を確認しています.
科学分野:
- 霊長類の行動
- 進化生物学の進化生物学について
- 哺乳類の繁殖 哺乳類の繁殖
背景:
- 男性の親の介護は哺乳類では珍しいが,サーコピテシン類の霊長類では観察されている.
- オスの霊長類は,育毛,運搬,保護を通じてケアを提供しますが,自分の子孫への選択的な投資は議論されています.
- 以前の研究では,雄が子供を殺す可能性のある子孫を保護することを示したが,社会的紛争における選択的ケアは示さなかった.
研究 の 目的:
- 男性のサバンナ・パビオン (Papio cynocephalus) が,選択的に自分の子孫に注意を向けているかどうかを判断する.
- 苦痛を伴う紛争における男性による支援が,フィットネス・ベネフィット付きの真の親の世話であるかどうかを調査する.
主な方法:
- 75匹のサバンナ・バビオンの未成年者の父権が確認されました.
- 未成年者が関与する激烈な紛争における成人の男性の介入に関するデータを収集しました.
- 男性の介護は,成人男性と若者の関係に基づいて分析されました.
主要な成果:
- 成人した雄のサバンナ・パビオンは,自分の子孫と無縁の幼生を区別した.
- 男性は,自分の子孫を支えるために,痛烈な争いに選択的に介入した.
- 紛争におけるこの選択的な支援は,真の親のケアの一形態として提案されています.
結論:
- 男性のサバンナ・パビオンは,社会的紛争で選択的に子孫を支援することによって,真の親のケアを示します.
- この選択的ケアにより,子孫の生存率,ランク獲得,全体的な健康状態が改善される可能性が高い.
- この発見は,父子の投資が多雄多雌の霊長類群に限られているという以前の仮定に異議を唱えている.
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