Circannual phase response curves to short and long photoperiod in the European hamster.

@article{Monecke2009CircannualPR,
  title={Circannual phase response curves to short and long photoperiod in the European hamster.},
  author={Stefanie Monecke and Michel Saboureau and Andr{\'e} Malan and Daniel Bonn and Mireille Masson-P{\'e}vet and Paul P{\'e}vet},
  journal={Journal of biological rhythms},
  year={2009},
  volume={24 5},
  pages={413-26}
}
This study investigated in male European hamsters (Cricetus cricetus ) whether entrainment of circannual rhythms follows the principles of the nonparametric entrainment model. In 2 experiments the times of the year when long (LP) or short photoperiod (SP) are able to synchronize the reproductive cycle were determined, by recording phase response curves (PRCs). A total of 28 groups of 10 hamsters were synchronized by SP, before being subjected to 2 converse experiments: a) 14 groups were… CONTINUE READING

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