Nestling testosterone is associated with begging behaviour and fledging success in the pied flycatcher, Ficedula hypoleuca.

@article{Goodship2006NestlingTI,
  title={Nestling testosterone is associated with begging behaviour and fledging success in the pied flycatcher, Ficedula hypoleuca.},
  author={Nicola M Goodship and K L Buchanan},
  journal={Proceedings. Biological sciences},
  year={2006},
  volume={273 1582},
  pages={71-6}
}
Animal signals are hypothesized to be costly in order to honestly reflect individual quality. Offspring solicitation signals given by nestling birds are thought to have evolved to advertise either need or individual quality. We tested the potential role of testosterone (T) in controlling the intensity of these signals by measuring begging behaviour as: (i) duration of the begging display and (ii) maximum height of the begging stretch, and by sampling endogenous T levels in nestling blood. We… CONTINUE READING

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