セックスバイアスによる化順序とアダプティブ・ポピュレーションの差異は,小鳥の小鳥に共通しています

Alexander V Badyaev¹, Geoffrey E Hill, Michelle L Beck

¹Division of Biological Sciences, University of Montana, Missoula, MT 59812, USA. abadyaev@selway.umt.edu

Science (New York, N.Y.)

|January 12, 2002

まとめ

雌の家鳥は,卵を産む順序に基づいて子孫の性別と成長を戦略的に調整し,子孫の死亡率を大幅に低下させます. これらの適応的な母子の効果は,人口の急速な分岐を促す可能性があります.

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.
鳥類の繁殖は,鳥類の繁殖である.

背景:

鳥の産卵順序は,子孫の発達と生存に影響する.
子孫に対する性特異的な影響は,鳥類の種で一般的です.
母親の影響は,子孫のフェノタイプに決定的な役割を果たします.

研究の目的:

家鳥が産卵順序に基づいて子孫の性別と成長を調整するかどうかを調査する.
これらの調整が子孫の死亡率に与える影響を判断する.
適応的な集団の分散における母子の影響の役割を調査する.

主な方法:

モンタナ州とアラバマ州で導入された2つの家鳥の群れを研究した.
実験的に操作された卵を産む順序に関連した母親の効果.
子孫の成長,形質,生存率を評価した.

主要な成果:

繁殖するメスは,産卵順に順番に子孫の性別と成長を調整した.
この戦略は,両方の集団で10~20%の子どもの死亡率を減少させました.
子孫の成長と形態学に対する母親の影響は持続的で性特異的であった.

結論:

産卵順序と関連した性別特有の母性効果は,家鳥の子孫の生存率を高めます.
これらの親の戦略は,家鳥の集団の間の迅速な適応的分岐を促進する可能性があります.
母性の影響を理解することは,種における急速な進化的変化を説明する鍵です.

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