緑の木のカエル (Hyla cinerea) の性寄生主義
Science (New York, N.Y.)
|June 9, 1978
まとめ
衛星の雄のツリーフローグは,エネルギーを節約するためにユニークな交配戦略を使用します. ノンコールする雄は雌を傍受し,アンプレクススを達成し,交尾し,他の脊椎動物に見られる戦略に似ています.
科学分野:
- ヘルペトロジー ヘルペトロジー
- 動物の行動 動物の行動
- 進化生物学の進化生物学について
背景:
- オスの木はしばしば音信号 (呼び声) を使って,交尾のためにメスを引き付けます.
- ボカライゼーションにはかなりのエネルギー支出が必要で,潜在的に生殖の機会を制限する可能性があります.
研究 の 目的:
- 鳴き声のない雄の樹の交配戦略を調査する.
- 衛星の雄の交尾戦術の頻度と成功率を決定する.
主な方法:
- ジョージア州の池で樹の個体数に関する観察研究.
- 男性を呼び出すためにシミュレートされた女性のアプローチを含むフィールド実験.
- 呼び出しをしなかった雄が雌を傍受した事例を記録する.
主要な成果:
- 呼び出ししない衛星オスは,呼び出しするオスの16%近くで観察されました.
- 30件の実験のうち13件の実験で,サテライトオスは妊娠しているメスを成功裏に捕まえた.
- この戦略により,鳴き声のない雄は雌とのアンプレクススを達成することができました.
結論:
- 呼び出さない衛星雄の行動は,樹の生殖戦略である.
- この戦術は,発声と比較してエネルギーを節約し,交配の代替ルートを提供します.
- 観察された戦略は,他の脊椎動物種に見られる同様の戦術に類似しています.
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