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Keywords:

  • Honeybee;
  • Apis mellifera;
  • metabolism;
  • social group;
  • circadian rhythm;
  • Zeitgeber;
  • entrainment

ABSTRACT. Groups of honeybee workers (Apis mellifera Linn.; Hymenoptera: Apidae) show endogenous circadian rhythms in metabolic activity. Workers entrained to two different photoperiods, when put together in a group, coordinate their individual metabolic activity cycles into a synchronized group oscillation. Either physical interaction among workers, or a low volatility contact pheromone, is implicated in the control of this oscillating system.