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動物模倣: 掃除魚の模倣者になるタイミングを決める

Isabelle M Côté¹, Karen L Cheney

¹Centre for Ecology, Evolution and Conservation, School of Biological Sciences, University of East Anglia, Norwich NR4 7TJ, UK. i.cote@uea.ac.uk

|January 22, 2005

まとめ

ブルーストライプ・ファングブレンニー・フィッシュは,肉食動物を避け,獲物を狩るために外見を変えて,選択的模倣を披露します. このダイナミックな模倣により,魚はクリーンなウラスを思い浮かべ,小さなサンゴ礁魚と混在することを切り替えることができます.

科学分野:

マリン・バイオロジーマリン・バイオロジー
行動生態学行動生態学
進化生物学の進化生物学について

背景:

脊椎動物の真似は,通常,固定され,生涯にわたる特徴です.
模倣者は通常,模倣の段階を通してモデルに似ているし,そのモデルと一緒にいる.

研究の目的:

ブルーストライプドファングブレンニ (Plagiotremus rhinorhynchos) のダイナミックミミクリを調査する.
この魚が,生き残り,餌を獲るために外見をどのように変えているかを理解するには,

主な方法:

ブルーストライプド・ファングブレンニーの行動と色付けに関する観察的研究.
fangblennyの環境と他の魚種との相互作用の分析.

主要な成果:

ブルーストライプド・ファングブレンニーは,典型的な模倣動物とは異なり,色を変えることができます.
この選択的模倣は,無害なブルーストリーククリーナーワース (Labroides dimidiatus) の真似を可能にします.
魚はまた,小さなサンゴ礁の魚群と融合するために異なる外観を採用します.

結論:

この好機的模倣は,ファングブレンニーの生態学的ニッチを拡大する.
外見を変える能力は,清掃所や魚の群れで目立たないようにする能力を高めます.

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