Regulation of Yolk-Androgen Concentrations byPlasma Prolactin in the American Kestrel

American Kestrel (Falco sparverius) Science Article 12


The concentrations of maternally derived androgens in the yolks of avian eggs vary within and among clutches, but a mechanistic basis for this variation has not been elucidated. We investigated in the American kestrel, Falco sparverius, whether changes in plasma-prolactinconcentrations induced by changes in photoperiod and food supply affect yolk-androgen concentrations.

Keith W. Sockman, Hubert Schwabl, and Peter J. Sharp, Hormones and Behavior 40, 462-471 (2001)

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