マグネティック・ディレクション・ファインディング: 移動性インディゴ・バンティングでの使用の証拠

S T Emlen, W Wiltschko, N J Demong

Science (New York, N.Y.)

|August 6, 1976

まとめ

移住するインディゴ・バンティングは,地球の磁場を利用して航海します. 彼らの移動方向は,磁場の変化によって変化し,磁場検出と方向化の利用が確認されました.

科学分野:

鳥類学鳥類学とは,鳥類学である.
動物の行動動物の行動
地質物理学地質物理学とは地質物理学です.

背景:

移動する鳥は,天文情報や磁気情報を含む,様々なシグナルに頼って航海します.
鳥が地磁場を感知して利用する正確なメカニズムは,依然として研究の対象となっている.

研究の目的:

制御された磁場条件下におけるインディゴ色のバントリングの方向性を調査する.
インディゴ・バンティングが地磁場の変化を検知し,それに反応できるかどうかを判断する.

主な方法:

檻に閉じ込められたインディゴ・バンティングは,通常の磁場条件と変化した磁場条件に曝された.
磁場の影響を隔離するために,視覚的なヒントは最小限に抑えられました.
オリエンテーションの方向は,自動追跡システムを使用して記録されました.

主要な成果:

正常な地磁場の存在下では,彼らの典型的な移動方向である北に向いている.
横の磁場コンポーネントを120度傾けると,バントリングの方向が東南東に相応にシフトした.
これらの行動の変化は,磁場操作に対する直接的な反応を示しています.

結論:

インディゴ色は,地磁場を感知する能力を持っている.
この磁気感覚は,インディゴ・バンティングによって,彼らの移動方向を決定し,最終化するために積極的に使用されます.
この発見は,航空航行戦略と磁気受容の理解に寄与する.

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