Thursday, 8 September 2016

A rabbit is active at dawn & dusk. It's normal activity is recorded in a lab for 6 days, then recorded in constant darkness for another 10 days. There s still a pattern to the rabbits behavior but it starts 20 mins later each day.
  • Zeitgeber
  • Entrained
  • Biological Clock
  • Endogenous
  • Exogenous
  • Circadian
  • Circatidal
  • Phase Shift 
  • period of..
  • Nocturnal
  • Diurnal
  • Crepuscular
  • Biorythm
A rabbit is crepuscular. It's normal exogenous rhythm was recorded for 6 days with the zeitgeber present, which was entrained the rhythm. When the rabbit's activity was recorded in darkness the zeitgeber was removed & the activity pattern became free running which means the biorhythm is endogenous and the rabbit's biological clock is helping to run it.

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