Circadian phase and period responses to light stimuli in two nocturnal rodents |
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Authors: | Sharma Vijay Kumar Daan Serge |
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Affiliation: | a Chronobiology Laboratory, Evolutionary and Organismal Biology Unit, Jawaharlal Nehru Center for Advanced Scientific Research, Bangalore, Karnataka, Indiab Zoological Laboratory, Biological Center, University of Groningen, Haren, The Netherlands |
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Abstract: | We report period response curves (τRC) for two nocturnal Murid species from India, Mus booduga and Mus platythrix. We further discuss the method of phase shift estimation in the presence of τ-changes, because such changes pose a serious methodological problem in the estimation of phase shifts. Although the τRC indicates that most of the phase shifts are associated with small changes in τ, the period changes across all the phases showed a significant positive correlation with the phase shifts. We conclude that τRCs are a reality even in nocturnal mammals, although their amplitude is less than what is usually found in diurnal mammals, and requires a larger data set to be distinguished from noise. |
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Keywords: | Circadian Diurnal Nocturnal Phase response curve Period response curve |
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