Effect of Lithium Chloride on the Circadian Rhythm in the Flight Activity of the Microchiropteran Bat, Taphozous melanopogon

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Abstract
Experiments were performed on the influence of Li+ offered through drinking water on the period length (.tau.) of the rhythm in the flight activity of bats under LL [continuous light] and on phase angles during entrainment under LD [light-dark] cycles. Bats subject to entrainment exhibited no qualitative and quantitative change in .psi. values after Li+ treatment. In contrast, the ingestion of Li ions by bats under free-running conditions shortens the .tau. of the bat rhythm by an amount that is a function of period length prior to ingestion. .tau. is thus homeostatically conserved in the face of Li administration in bats.

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