Food anticipatory activity (FAA) in PAC1+/+ and PAC1-/- receptor deficient mice under a full photoperiod (FPP) and skeleton photoperiod (SPP) at light intensities of either 300 lux or 10 lux.

<p>The light/dark period is indicated below the X-axis in yellow/black. The same 8 animals of each genotype were used in all experiments and data are average of 5 d of activity (see also <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0146981#sec002" target="_blank">material and methods</a>). A. Group mean (± SEM) waveform of wheel running activity of PAC1+/+ (blue line) and PAC1-/- mice (red line) during FPP at 300 lux. B. Group mean (± SEM) waveform of wheel running activity of the same animals as in A showing FAA before mealtime (indicated by light green). C. Group mean (± SEM) waveform of wheel running activity of PAC1+/+ (blue line) and PAC1 -/- mice (red line) during SPP at 300 lux. D. Group mean (± SEM) waveform of wheel running activity of the same animals as in C showing FAA before mealtime (indicated by light green). E and F correspond to A and B but at light intensity of 10 lux. G and H correspond to C and D but at light intensity of 10 lux.