Figure 3

Planarian activity following food inputs. Occurrence in active mode (as % of total number of individuals; average ± standard error) just before (13:00 or 1:00), at 5-min intervals for the first 30 min, and 1 h after daytime (left panels, in yellow) and nighttime food addition (right panels, in blue), for the three species examined. Lower-case letters identify significantly different average values according to SNK tests (p ≤ 0.05) performed after significant one-way, type I ANOVAs (D. polychroa: F _day = 4.509, p < 0.001; F _night = 2.368, p = 0.02; D. tigrina: F _day = 3.734, p < 0.01; F _night = 4.316, p < 0.001; P. tenuis: F _day = 0.616, p = 0.74; F _night = 0.304, p = 0.95; df = 7,88 for all).