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マルチモダルの警告信号は,複数の捕食者の世界を警告しています.

John M Ratcliffe1, Marie L Nydam

  • 1Center for Sound Communication, Institute of Biology, University of Southern Denmark, DK-5230 Odense M, Denmark. jmr@biology.sdu.dk

Nature
|September 5, 2008
PubMed
まとめ
この要約は機械生成です。

虎は,捕食者の活動に基づいて警告信号を発現します. 視覚信号と音響信号は,鳥やコウモリの捕食圧力によって変化し,異なる季節や時間帯に適応します.

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科学分野:

  • エコロジー エコロジー エコロジー
  • 進化生物学の進化生物学について
  • 動物の行動 動物の行動

背景:

  • アポセマチズムは,捕食者に対する防御であり,捕食者は獲物のシグナルを非利益と結びつける.
  • マルチモダル信号の有効性は,捕食者の感覚システムによって異なりますが,複数の捕食者クラスの信号進化への影響は十分に研究されていません.

研究 の 目的:

  • 複数の捕食者クラスが虎の警告信号の進化にどのように影響するか調査する.
  • 虎の警告信号が,異なる捕食者の感覚能力と活動パターンによって異なるかどうかを判断する.

主な方法:

  • コミュニティレベルでの分子フィロゲニスを利用して,系統遺伝学的に独立したコントラストを生成しました.
  • 鳥やコウモリの季節的および毎日の活動パターンに関連して,虎の警告信号の進化を分析しました.

主要な成果:

  • 染色や超音波のクリックを含むトラモスの警告信号は,鳥やコウモリの活動によって異なります.
  • 春の昼間活動している種は,視覚的に目立っていたが,夜間活動または夜間活動している種は,超音波のクリックを発したり,視覚的に神秘的であった.

結論:

  • 複数の捕食者クラスからの選択的圧力は,マルチモダル警告ディスプレイの形づくりに異なる役割を果たします.
  • タイガーモールの音響警告信号は,理論的な課題が少ないため,目立つ色彩よりも容易に進化する可能性があります.