Circadian entrainment by feeding cycles in house sparrows, Passer domesticus

  title={Circadian entrainment by feeding cycles in house sparrows, Passer domesticus},
  author={Michaela Hau and Eberhard Gwinner},
  journal={Journal of Comparative Physiology A},
SummaryWe studied the potential zeitgeber qualities of periodic food availability on the circadian rhythms of locomotor and feeding activity of house sparrows. The birds were initially held in a LD-cycle of 12:12 h, with food restricted to the light phase. After transfer to constant dim light, the birds remained entrained by the restricted feeding schedule. Following an exposure to food ad libitum conditions, the rhythms could be re-synchronized by the feeding cycle. Shortening of the zeitgeber… 

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