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公開情報と野生の鳥の集団における繁殖生息地選択
Blandine Doligez1, Etienne Danchin, Jean Clobert
1Laboratoire d'Ecologie CNRS-UMR 7625, Université Pierre et Marie Curie, 7 quai Saint Bernard, Bâtiment A 7ème étage, Case 237, F-75252 Paris Cedex 05, France. blandine.doligez@esh.unibe.ch
まとめ
動物は,生息地の質を評価するために,子孫に関する公的な情報を使用します. コラーフライキャッチャー (Ficedula albicollis) の新規および既存の居住者は,子孫の量と質を使用して,どこで繁殖するかを決定します.
科学分野:
- 行動生態学 行動生態学
- 動物の行動 動物の行動
- 進化生物学の進化生物学について
背景:
- "公的情報"仮説は,動物が生息地の質を測定するために同種の生殖成功を使用することを示唆しています.
- この情報は,最適な繁殖地を選ぶのに役立ちます.
研究 の 目的:
- コラーレードフライキャッチャー (Ficedula albicollis) で公衆情報仮説を実験的に検証する.
- "量" (子孫の数) と"質" (子孫の状態) が繁殖場決定にどのように影響するか調査する.
主な方法:
- 実験集団における地元の子孫の"量"と"質"の操作.
- 住環境評価の指標としての移民と移民率の監視.
主要な成果:
- 移民率は,地元の子孫の"量"が高くなると減少したが",質"の影響を受けなかった.
- 移住率は,地元の子孫の"数量"または"質"が減少したとき,著しく増加しました.
結論:
- コラーレード・フライキャッチャーは,繁殖決定のための公的な情報として,子孫の"量"と"品質"の両方を利用します.
- 移民は子孫の"数量"に頼っているように見えるが,住民は"数量"と"質"の両方を用いる.
- この研究は,生息地選択における公衆情報の役割に関する実験的証拠を提供します.
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