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マグネトレセプションと,そのトライジェミナルメディエーションは,伝道鳩の伝道鳩で起こります
Cordula V Mora1, Michael Davison, J Martin Wild
1School of Biological Sciences, University of Auckland, Private Bag 92019, Auckland, New Zealand. cvmora@email.unc.edu
Nature
|November 27, 2004
まとめ
ホーミング鳩は磁気異常を検出することができ,ナビゲーションのための磁気感覚を示唆します. この能力は,おそらく上部のくちばしにあるが,磁石や神経ブロックによって損なわれ,嗅覚の欠如によって損なわれていない.
科学分野:
- 鳥類学 鳥類学とは,鳥類学である.
- 動物ナビゲーション 動物ナビゲーション
- 感覚生物学 感覚生物学について
背景:
- 鳩のナビゲーションは,大気中の匂いや地球の磁場に依存しています.
- 以前の研究では,鳩の磁気感受性について矛盾する結果が得られ,磁気地図の使用能力が疑問視された.
- "地図とコンパス"の仮説は,鳩が帰り道に磁気地図を使用することを示唆しています.
研究 の 目的:
- 伝送鳩の磁気異常を識別する能力を調査するために.
- 鳩の磁気受容に関与する感覚機構と位置を特定する.
- 鳩のオリエンテーション実験で使用される伝統的な方法を再評価する.
主な方法:
- 磁気異常に対する鳩の反応をテストするための条件付き選択実験.
- 磁石の取り付け,上部ニキビの局所麻酔,神経部 (三本体と嗅覚部) を含む実験的操作.
- 異なる実験条件下での差別障害の評価.
主要な成果:
- ホーミング鳩は,磁気異常の存在と欠如を区別することを示しました.
- 識別能力は,磁石をシールに固定し,上部ニキビを麻痺させることで著しく低下しました.
- トライジェミナル神経の眼の枝を切断すると,差別が損なわれ,嗅覚神経を切断すると,差別が損なわれなかった.
結論:
- マグネトレセプションは,おそらく磁石を基にしたもので,帰り鳥のの上部部部に位置しています.
- アノスミア (嗅覚の喪失) を誘発する伝統的な方法は,無意識に磁気受容を損なう可能性があります.
- 将来の指向研究は,鳩の磁気および嗅覚感覚システムを独立して評価する必要があります.
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