Photoperiodic Influences on Ultradian Rhythms of Male Siberian Hamsters

@inproceedings{Prendergast2012PhotoperiodicIO,
  title={Photoperiodic Influences on Ultradian Rhythms of Male Siberian Hamsters},
  author={Brian J. Prendergast and Irving Zucker},
  booktitle={PloS one},
  year={2012}
}
Seasonal changes in mammalian physiology and behavior are proximately controlled by the annual variation in day length. Long summer and short winter day lengths markedly alter the amplitude of endogenous circadian rhythms and may affect ultradian oscillations, but the threshold photoperiods for inducing these changes are not known. We assessed the effects of short and intermediate day lengths and changes in reproductive physiology on circadian and ultradian rhythms of locomotor activity in… CONTINUE READING
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