IRRADIANCE DEPENDENCY OF UV-A INDUCED PHASE SHIFTS IN THE LOCOMOTOR ACTIVITY RHYTHM OF THE FIELD MOUSE MUS BOODUGA

Vijay Kumar Sharma Chronobiology Laboratory, Evolutionary and Organismal Biology Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore, Karnataka, India; Chronobiology Laboratory, Evolutionary and Organismal Biology Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, P.O. Box 6436, Jakkur, Bangalore, Karnataka, 560 064, India

R. Chidambaram Department of Animal Behaviour and Physiology, School of Biological Sciences, Madurai Kamaraj University, Madurai, Tamil Nadu, India

Tennyson Jeba Singh Department of Animal Behaviour and Physiology, School of Biological Sciences, Madurai Kamaraj University, Madurai, Tamil Nadu, India

K. Lingakumar Department of Plant Sciences, School of Biological Sciences, Madurai Kamaraj University, Madurai, Tamil Nadu, India

Ramanujam Subbaraj Department of Animal Behaviour and Physiology, School of Biological Sciences, Madurai Kamaraj University, Madurai, Tamil Nadu, India

Maroli K. Chandrashekaran Chronobiology Laboratory, Evolutionary and Organismal Biology Unit, Jawaharlal NehruCentre for Advanced Scientific Research, Jakkur, Bangalore, Karnataka, India

Abstract

In the nocturnal field mouse Mus booduga, the responsiveness of the circadian system to UV-A light of 2.5 W/m² and 30 minutes duration is known to be phase dependent. The results of our experiments indicate that the phase shifts evoked by UV-A at the two phases, CT14 (circadian time 14) and CT20 increases nonlinearly with irradiance. (Chronobiology International, 17(6), 777–782, 2000)

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IRRADIANCE DEPENDENCY OF UV-A INDUCED PHASE SHIFTS IN THE LOCOMOTOR ACTIVITY RHYTHM OF THE FIELD MOUSE MUS BOODUGA

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IRRADIANCE DEPENDENCY OF UV-A INDUCED PHASE SHIFTS IN THE LOCOMOTOR ACTIVITY RHYTHM OF THE FIELD MOUSE MUS BOODUGA

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