Extended Data Fig. 4: Qualitatively similar evening peak plasticity and morning peak activity in two Canton-S strains.
From: Circadian plasticity evolves through regulatory changes in a neuropeptide gene
a, Mean normalised activity of two Canton-S (CS and CSW) strains under 12:12 h (left) and 16:8 h LD (right). Plots depict average activity of the last 4 days of a 7-day extended photoperiod, following 7 days of 12:12 h LD. Vertical dashed lines indicate the average timing of the evening peak for each strain. Dashed boxes highlight the pre-dawn period, 3 h before lights-on. Sample sizes: 12:12 h LD CS (29), CSW (42); 16:8 h LD CS (18), CSW (16). b, Evening peak time for the flies in a is shown for each strain under 12:12 h (left) and 16:8 h LD (right). No significant differences were observed between strains (Wilcoxon test). c, Mean normalised pre-dawn activity for flies under 12:12 h LD (from a, within the indicated pre-dawn period). Asterisks indicate significant differences: ** = P < 0.01 (Wilcoxon test).
