母への投資. 母への投資. 鳥の卵黄ホルモンのレベルにおける性差異
M Petrie1, H Schwabl, N Brande-Lavridsen
1Evolution and Behaviour Research Group, Department of Psychology, University of Newcastle upon Tyne, Newcastle upon Tyne NE1 7RU, UK. marion.petrie@ncl.ac.uk
Nature
|August 3, 2001
まとめ
雌の鳥は,魅力的な雄の卵により多くのリソースを投資しないかもしれません. 卵黄ホルモンのレベルは,雄の卵と雌の卵の間で大きく異なっており,性別決定に役割を果たしていることを示唆しています.
科学分野:
- 鳥類の繁殖は,鳥類の繁殖である.
- エンドクリノロジー エンドクリノロジー
- 性選択性選択性選択とは
背景:
- 以前の研究では,雌の鳥が雄の魅力に基づいて卵投資を調整することを示唆していた.
- これらの研究では,雄性卵と雌性卵の供給における潜在的な違いがしばしば見過ごされた.
- 卵の性別をコントロールすることは,母子の投資の正確な解釈に不可欠です.
研究 の 目的:
- 鳥の卵における黄色のホルモン濃度の性別差異を調査する.
- 男性の魅力に基づく母性投資の差異の主張を再評価する.
- 鳥の性別決定における黄色のステロイドの潜在的役割を調査する.
主な方法:
- ホルモン濃度は,鳥の卵の黄に測定されました.
- 卵は,産卵した子の性別に基づいて分類された.
- 性別間のホルモンレベルを比較するために,統計的分析が行われました.
主要な成果:
- 男性の卵と女性の卵の黄の間に,ホルモン濃度の有意な違いが見つかりました.
- この発見は,プロビジョニングが男性の魅力にのみ基づいているという仮定に異議を唱える.
- 黄色のホルモンのレベルは,性別に依存しているようです.
結論:
- 雌の鳥が,好ましい雄の卵により多くの投資をするという現在の結論は,早すぎるかもしれません.
- 男性の魅力だけでなく,卵の性別に基づく差異的な供給も考慮する必要がある.
- 鳥の卵黄の性ステロイドは,鳥の性決定メカニズムに役割を果たす可能性がある.
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