協同繁殖するカクヨウの代替繁殖策としての社会寄生
Christina Riehl1, Meghan J Strong2
1Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ, USA. criehl@princeton.edu.
Nature
|March 1, 2019
まとめ
大型のアニスでは 協働型と寄生型の巣作りの戦略は 同じような健康上の利点をもたらします 生殖のトレードオフと宿主の防御は これらの多様な巣づくり行動の 安定した共存を説明します
科学分野:
- 行動エコロジー
- 進化生物学
- 鳥類学
背景:
- 協力的な巣を作る鳥は 宿主巣に卵を産む個体から 寄生虫に感染します
- 研究は主に社会寄生虫に対する宿主の防御に重点を置いていますが,なぜ雌が寄生虫対協力的戦略を採用するのかはあまり理解されていません.
研究 の 目的:
- 大 (Crotophaga major) での協力的および寄生性の生殖戦略の健康効果を調査する.
- 一つの集団内の両方の巣作りの戦術の出現と安定に影響を与える要因を理解する.
主な方法:
- 11年間のデータセットと 総合的な遺伝子データを使って
- 異なる巣作りの戦略を用いた 個々のメスの生殖史と生殖成功を比較した.
主要な成果:
- 協力的および寄生的な生殖戦略は,より大きなアニのメスのためのほぼ同じフィットネス報酬をもたらします.
- 最初の巣が破壊されたメスは 寄生虫の行動をとる可能性が高くなります
- 個人の専門性は 寄生する傾向によって示された.
- 純粋に協力的なメスは 混合戦略のメスと比べて 自身の巣から 繁殖の成功率が高かった.
結論:
- 寄生虫と協力的な戦術の安定した共存は 繁殖のトレードオフと宿主の防御によって促進されます
- 個人の専門化と条件付き戦略は,集団における両方の行動の維持に寄与する.
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