![]() ![]() ![]() ![]() Åkerstedt T, Gillberg M (1986) Sleep duration and the power spectral density of the EEG. 3, 9, 10, 12).Īndersen FO (1968) Sleep in moths and its dependence on the frequency of stimulation in Anagasta kuehniella. Unlike mammals, bees experience their deepest sleep towards the end of the sleep phase (Figs. Sleep in mammals is an active, controlled process the same seems to be true of sleep in honeybees (Figs. The total sleep time (duration of antennal immobility plus duration of small antennal movements) in 24 h for two bees was 7.6 h and 4.9 h (Table 1).īees which rest in a hive at night also display phenomena which have been encountered during the laboratory investigations. High reaction thresholds are associated with particular antennal positions. The antennae of sleeping bees manifest characteristic postural constellations (Fig. This assumption is further supported by the results of previous investigations of visual interneurones in the bee. It is thus very likely that the profound rest which forager bees experience at night is sleep. These phenomena strongly resemble four characteristic features of sleep in humans, mammals and birds. 7, 8) and raised reaction threshold (Fig. 2, 3, Table 1), lowered body temperature (Figs. Prolonged rest in these diurnal insects is accompanied by: reduced muscle tone (Figs. The behaviour of isolated individual forager honeybees during the night has been investigated with a variety of experimental methods. ![]()
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