Response of the starling circadian system to transitions between light and darkness |
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Authors: | R. Subbaraj |
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Affiliation: | (1) Department of Animal Behaviour, School of Biological Sciences, Madurai Kamaraj University, 625 021 Madurai, (India) |
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Abstract: | Summary The effects of exposure to sudden transitions from dark to light (D/L) and light to dark (L/D) were determined on the free running circadian feding rhythm of European stalings (Sturnus vulgaris). D/L transitions (step-up) produced phase advances throughout the circadian cycle. In contrast L/D transitions (step-down) produced both advances and delays. The L/D transition phase-response curve has a contour and shape similar to the phase-response curves previously obtained in birds with light pulses. |
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Keywords: | Ligh-dark transitions light pulse phase-response curves Sturnus vulgaris |
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