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Figure 2a-d: Feeding and locomotor activity recorded from P-X pigeons first entrained to LD and then subjected to DD and melatonin infusion (top box). Infusion of vehicle was continued (bottom boxes - band c only) with the same phase after the melatonin infusion was terminated. The activity records are double plotted to facilitate visual inspection of the data. (Up arrow lights on; down arrow - lights off). a) infusion period = 24.41, melatonin dose = 3.6 uglhr; b) infusion period = 23.67, dose = 0.93 uglhr; c) infusion period = 24.77, dose = 0.93 uglhr; d) infusion period = 24.41, dose = 0.46 uglhr.


Figure 2a-d: Feeding and locomotor activity recorded from P-X pigeons first entrained to LD and then subjected to DD and melatonin infusion (top box). Infusion of vehicle was continued (bottom boxes - band c only) with the same phase after the melatonin infusion was terminated. The activity records are double plotted to facilitate visual inspection of the data. (Up arrow lights on; down arrow - lights off). a) infusion period = 24.41, melatonin dose = 3.6 uglhr; b) infusion period = 23.67, dose = 0.93 uglhr; c) infusion period = 24.77, dose = 0.93 uglhr; d) infusion period = 24.41, dose = 0.46 uglhr.
Fig 2a	Fig 2b	Fig 2c	Fig 2d