将来のフィットネスと,社会的な列に並ぶのを助けること
Jeremy Field1, Adam Cronin, Catherine Bridge
1Department of Biology, University College London, Wolfson House, 4 Stephenson Way, London NW1 2HE, UK. jeremy.field@ucl.ac.uk
Nature
|May 12, 2006
まとめ
原始的な社会的な動物では,助手は将来の生殖の機会に基づいて彼らの努力を調整します. 将来のフィットネスの低下は,助ける努力の減少につながり,社会的な昆虫の行動における重要なトレードオフを示しています.
科学分野:
- 行動生態学 行動生態学
- 進化生物学の進化生物学について
- 社会的な昆虫は,社会的な昆虫です.
背景:
- 社会的昆虫の助手は,支配的な繁殖者を助けるために,しばしば個人的な繁殖を犠牲にする.
- 親族選択理論は,援助行動のいくつかの側面を説明しますが,個々の努力の変動ではありません.
- 間接的なフィットネス獲得と将来の直接的なフィットネスコストのトレードオフは,努力の違いを説明することができます.
研究 の 目的:
- ホーバーホースプ (Stenogastrinae) の努力を支援する将来のフィットネス展望の影響を調査する.
- 援助者が,自分の将来の生存と繁殖に伴うコストを考慮して,作業速度を調整するかどうかを判断する.
主な方法:
- 将来のヘルパーとしての適性を決定する2つの重要な要素の実験操作: 継承確率と将来の労働力の可用性.
- これらの操作に対する対応として,援助の努力を観察し,定量化します.
主要な成果:
- ホーバーホースプの助手は,将来のフィットネスの潜在的損失が高かったときに,彼らの援助の努力を減少させた.
- 逆に,将来のフィットネスの見通しが改善されたとき,ヘルパーたちは努力を増した.
- 個人の援助の努力は,働くことの見込みのコストによって大きく影響を受けます.
結論:
- 介助に伴うコストの変動は,単なる間接的なフィットネス・ベネフィットではなく,個人の介助の努力の主な原動力です.
- この研究は,協力的に繁殖する種における社会的行動の形成における将来のフィットネス・トレードオフの重要性を強調しています.
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