大型ナクチュールコウモリ は 飛ぶ 中 で 鳥 を 捕食 し て い ます
L Stidsholt1,2, E Tena3, I Foskolos1,4
1Section of Zoophysiology, Department of Biology, Aarhus University, Aarhus, Denmark.
まとめ
大型夜鳥のコウモリが 高空で移動する鳥を エコーロケーションで狩ります このコウモリは 長い追いかけて 飛行中に鳥類を捕まえて 独特の食糧源にアクセスします
科学分野:
- 鳥類学
- バット エコロジー
- バイオアコースティック
背景:
- 数十億羽の鳥が 高空で夜間移動しています
- この豊富な獲物資源を 搾取するバット種はほとんどありません
- コウモリが高度に移動する鳥を捕食するメカニズムはよくわかっていない.
研究 の 目的:
- 移動する鳥類を特定し,捕獲し,食う方法について調べる.
- このコウモリが高度で狩りをする方法を 理解するためです
主な方法:
- 高解像度の生物標識が 大きな夜鳥のコウモリに配置された.
- コウモリの飛行経路と高度を分析した
- エコーロケーションの記録は 狩りの行動を推測するのに 潜在的に使われています
主要な成果:
- 狩りをするため 高海に登ります
- コウモリが捕獲物を追いかける
- パセリンは飛行中に空気中に消費されます.
結論:
- コウモリは超音波で 標高の高い獲物を検出します
- 移動する鳥を捕まえるには 長い空中追いかけるのが鍵です
- この特殊な捕食戦略は 独特で未使用の食糧資源へのアクセスを可能にします
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