アリの寄生虫の女王は,単独で交尾に戻ります.
Seirian Sumner1, William O H Hughes, Jes S Pedersen
1Biological Institute, Department of Population Biology, University of Copenhagen, 2100 Copenhagen, Denmark.
Nature
|March 6, 2004
まとめ
ポリアンドリー,または複数の交尾は,昆虫に共通しています. しかし,社会的寄生虫アリは,単一交配への驚くべき逆転を示し,ポリアンドリーコストは,自由に生きる種に特有のものであることを示唆しました.
科学分野:
- 進化生物学の進化生物学について
- 行動生態学は,行動生態学である.
- 昆虫の社交性 昆虫の社交性
背景:
- 複数の交配 (多性交) は昆虫に多く見られるが,その進化の原動力や維持因子を定量化することは依然として困難である.
- 異なる生活様式を持つ密接に関連した種を比較することで,ポリアンドリーの費用と利益を明らかにすることができます.
研究 の 目的:
- 葉切りアリ (Acromyrmex echinatior) とその社会寄生虫 (Acromyrmex insinuator) の交尾戦略を調査する.
- 自由に生きる種と,その社会的寄生虫の親戚を比較することによって,アリのポリアンドリーに影響を与える進化的圧力を理解する.
主な方法:
- Acromyrmex echinatior と Acromyrmex insinuator の間の交尾行動の比較分析について.
- 主体アリと寄生アリの両種の交配頻度の観察と文書化.
主要な成果:
- Acromyrmex echinatiorのクイーンには多頭性があり,十数匹のオスと交尾する.
- 社会的寄生虫であるアクロミルメックス・インシヌエーター・クイーンズは,単独の交配のみを行います.
- 社会的寄生虫において,ポリアンドリーから単一交配への急速な移行が観察されました.
結論:
- ポリアンドリーに伴うコストは,自由生活する生態学的戦略に特有のものと思われる.
- 社会寄生主義は,ポリアンドリーの放棄など,交配行動の急速な進化的変化につながる可能性があります.
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