フェロモンの濃度が,2つの白鳥類の種間の生殖的隔離のためのメカニズムとして
Science (New York, N.Y.)
|February 2, 1973
まとめ
密接に関連したの種であるTrichoplusia niとAutographa californicaは,同じ性フェロモンを使用しますが,濃度は異なります. このシス-7-ドデセニルアセテート濃度の差異は,重要な生殖障壁として作用し,種特有の交配を保証します.
科学分野:
- 化学エコロジー 化学エコロジー
- 行動生態学 行動生態学
- 昆虫のコミュニケーション
背景:
- 密接に関連した種は,繁殖的隔離でしばしば課題に直面します.
- フェロモンは,昆虫の交配のための重要な化学信号です.
- 夜型 (Noctuidae家族) は,複雑な交尾行動を示しています.
研究 の 目的:
- トリコプルシアニ (Trichoplusia ni) とオトグラファ・カリフォルニアカ (Autographa californica) の生殖分離における性フェロモン濃度の役割を調査する.
- cis-7-ドデセニルアセテート濃度が種特有の交配シューとして作用するかどうかを判断する.
主な方法:
- 合成シス-7-ドデセニルアセテートの制御された放出を用いたフィールドトラッピング実験.
- 同じフェロモンの異なる濃度に対する雄のモットの魅力の比較.
- 捕獲されたオスのの種識別.
主要な成果:
- Trichoplusia niとAutographa californicaの雄は,主に同種の雄に惹かれていた.
- シス-7-ドデセニルアセテートの特定の濃度は,各種の雄に異なる魅力を示した.
- ある種に最適化されたトラップは,他の種のオスを最小限に捕まえた.
結論:
- セックスフェロモンの濃度,特にシス-7-ドデセニルアセテートは,これらの夜型の有意な生殖分離機構です.
- フェロモンレベルの差異的な利用は,種間の交配を防止し,種の完全性を維持します.
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