Social entrainment of the circadian rhythm in the flight activity of the microchiropteran bat Hipposideros speoris

Acoustic ecology of Antarctic pinnipeds

“…Animals across various taxa inhabiting environments that lack time cues are known to socially and mutually synchronize circadian rhythms (e.g. Crowley & Bovet 1980, Marimuthu et al 1981, Aschoff et al 1983. Similarly, Weddell seals might use the vocalizations of conspecifics to synchronize their own vocal activity.…”

On the Chronobiology of Cohabitation

“…One study has demonstrated synchronous activity due to social cues in individuals separated by a barrier. Caged microchiropteran bats (Hipposideros speoris) housed in a cave without access to light synchronize their activity rhythms to local time, in-phase with their free-living conspecifics that leave the nest daily around sunset; a control bat caged in a cave devoid of other bats instead exhibited a free-running rhythm (Marimuthu et al 1981). Some studies have shown circadian effects in some individuals upon presentation of a putative social cue alone.…”

The role of the queen in circadian rhythms of honeybees (Apis mellifera L.)

“…Social zeitgebers are believed to be most significant for organisms that lack environmental zeitgebers in their nesting site (e.g. cave-nesting organisms such as beavers (Bovet and Oertli 1974) and bats (Marimuthu et al 1978(Marimuthu et al , 1981). Honeybees (Apis rnellifera) are also cave-nesters, and social zeitgebers may be equally if not more important for their colony biorhythms.…”