移住する歌う鳥の繁殖力,の緯度,羽毛の色
D Ryan Norris1, Peter P Marra, Robert Montgomerie
1Department of Biology, Queen's University, Kingston, Ontario K7L 3N6, Canada. ryann@biology.queensu.ca
Science (New York, N.Y.)
|December 25, 2004
まとめ
移住する歌う鳥は,繁殖,離,移住の間のトレードオフに直面します. 男性のアメリカン・レッドスターツのシーズン後半の繁殖は,移住中にを起こすことになり,羽毛の色や社会的信号に影響を及ぼしました.
科学分野:
- 鳥の生態学 鳥の生態学とは
- 動物の行動 動物の行動
- 生理学的な生態学は,生理学的な生態学である.
背景:
- 移住する歌う鳥は,繁殖,,移住をバランスとしなければならない.
- シーズン後半の繁殖は,その後の人生の出来事との衝突を引き起こす可能性があります.
研究 の 目的:
- 繁殖期の終わりにアメリカン・レッドスターツの雄が直面するトレードオフを調査する.
- 遅い生殖が,のタイミングと羽毛の色にどのように影響するかを理解するために.
主な方法:
- 羽根の起源を追跡するための安定した水素同位体分析.
- 羽毛の色 (反射) を測定するためのスペクトロフォトメトリー.
- アメリカン・レッドスターツのオスにおける繁殖とのタイミングの観察.
主要な成果:
- 男性のアメリカン・レッドスターツは,繁殖を遅い混合移転と移住で開始します.
- 移動中に毛が剥がれた羽は,カロテノイド濃度が低下した (オレンジ色と赤色が少なくなった).
- 後期生殖は,の位置と,その後の社会的シグナル表現に影響を与えた.
結論:
- 繁殖のタイミングは,移住鳥の生命史戦略に大きな影響を与えます.
- 移住中のモルトは,社会的相互作用で使用される視覚信号を変更することができます.
- 繁殖と遷移の間のトレードオフは,年間サイクルにカスケード効果があります.
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