Increased sibling competition does not increase testosterone or corticosterone levels in nestlings of the spotless starling (Sturnus unicolor).

@article{Gil2008IncreasedSC,
  title={Increased sibling competition does not increase testosterone or corticosterone levels in nestlings of the spotless starling (Sturnus unicolor).},
  author={D. Ruano Gil and Elena Bulmer and Patricia Celis and Marisa Puerta},
  journal={Hormones and behavior},
  year={2008},
  volume={54 2},
  pages={238-43}
}
Nestling begging in passerine birds is a complex behaviour that is shaped by a multitude of ecological factors and could be physiologically mediated by varying levels of steroid hormones. Previous research has shown links between sibling competition and testosterone and corticosterone in several bird species. The spotless starling (Sturnus unicolor) is a medium sized passerine in which nestlings compete intensively for resources, often resulting in marked size hierarchies that can have profound… CONTINUE READING

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