Maternal androgens in eggs of communally breeding guira cuckoos (Guira guira).

  title={Maternal androgens in eggs of communally breeding guira cuckoos (Guira guira).},
  author={Mariana O. Cariello and R. H. Macedo and Hubert G. Schwabl},
  journal={Hormones and behavior},
  volume={49 5},
Variation of maternal androgens in avian eggs may be a mechanism of maternal influence on offspring development, growth, and/or behavior. We studied yolk androgen concentrations in eggs of guira cuckoos (Guira guira) to understand how females might enhance the success of offspring in a complex communal breeding system. We measured concentrations of androstenedione, 5alpha-dihydrotestosterone, and testosterone in yolks and identified eggs and clutches of individuals in joint nests by yolk… CONTINUE READING

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