Corticosterone, testosterone and life-history strategies of birds.

  title={Corticosterone, testosterone and life-history strategies of birds.},
  author={Michaela Hau and Robert E. Ricklefs and Martin Wikelski and Kelly A. Lee and Jeffrey D. Brawn},
  journal={Proceedings. Biological sciences},
  volume={277 1697},
Steroid hormones have similar functions across vertebrates, but circulating concentrations can vary dramatically among species. We examined the hypothesis that variation in titres of corticosterone (Cort) and testosterone (T) is related to life-history traits of avian species. We predicted that Cort would reach higher levels under stress in species with higher annual adult survival rates since Cort is thought to promote physiological and behavioural responses that reduce risk to the individual… CONTINUE READING
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