メスバビオンの社会的絆は,乳児の生存率を高めます
Joan B Silk1, Susan C Alberts, Jeanne Altmann
1Department of Anthropology, University of California, Los Angeles (UCLA), CA 90095, USA. jsilk@anthro.ucla.edu
Science (New York, N.Y.)
|November 15, 2003
まとめ
強い社会的絆を持つ雌バビオンは,より高い乳児生存率を持っています. この社交性は,階級や環境に関係なく,フィットネスに直接影響し,霊長類の適応的価値を強調しています.
科学分野:
- 霊長類の行動生態学
- 進化生物学の進化生物学について
- 社会科学とは,社会科学である.
背景:
- 非人間霊長類の雌は,親族やグループメンバーと強い社会的絆を形成する.
- これらの関係は,メスのための適応的価値を持つと仮定されています.
- 女性霊長類における社交性と体調を結びつける直接的な証拠は欠けている.
研究 の 目的:
- 野生のバビオンの雌のフィットネスに対する社交性の直接的な影響を実証するために.
- 女性の社交性と乳児生存率の関連性を調査する.
- 幼児生存に対する社交性の影響が他の要因とは独立しているかどうかを判断する.
主な方法:
- 野生のバビオンの集団から16年以上にわたる縦断的な行動データ収集.
- 女性の社交性と乳児生存率の関係に関する分析.
- 支配的地位,グループメンバーシップ,環境条件などの変数の統計制御.
主要な成果:
- 雌のバビオンの社交性は,幼児の生存率と正に関連しています.
- 乳児の生存に対するこのポジティブな効果は,女性の生涯のフィットネスの重要な要素です.
- 幼児の生存に対する社交性の影響は,支配的地位,グループメンバーシップ,環境要因とは無関係です.
結論:
- 成人した雌バビオンの社会性は,乳児生存率を増やすことにより,直接的な適応的価値を持っています.
- 発見は,社会的支援が種間の健康と幸福に有益であるというより広範な仮説を支持しています.
- 社会的な絆は,人間と他の霊長類の両方の体調に不可欠です.
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