Fig. 5

The circadian clock is important for the timing of light environment sampling behaviour. In all subplots C57BL/6J animals are shown in blue and Cry1^−/−Cry2^−/− animals shown in orange. A Daily locomotor activity profile of C57BL/6J and Cry1^−/−Cry2^−/− animals housed with a nestbox under a 12:12 h LD cycle, calculated using the main cage PIR. B Daily light environment sampling profile of C57BL/6J and Cry1^−/−Cry2^−/− animals under a 12:12 h LD cycle. C Daily light environment sampling profile of C57BL/6J and Cry1^−/−Cry2^−/− animals under a 12:2:8:2 h LD cycle. A-C * p < 0.05, between genotype comparison. White, grey and black bar shows timing of light, light ramp and dark, respectively. D Number of light environment sampling events occurring during dawn (ZT22-0), the day (ZT0-12) and dusk (ZT12-14) by C57BL/6J and Cry1^−/−Cry2^−/− animals (note different scales). **** p < 0.001, ** p < 0.01, * p < 0.05, time of day comparisons. All results reported as mean across mice and days, ± SEM