(A) Locomotor activity over 9 d of wDah control and dilp2-3,5 mutant flies under 12∶12 h LD and constant darkness 12∶12 h DD (n = 12, age 20 d). Mean free running period (τ) in DD ± s.e.m. (B) Average activity count data (30 min bins) under 12∶12 h LD conditions (25 d wDah n = 48, dilp2-3,5 n = 31). (C) dilp2-3,5 mutants were more active during the day and less active during the night compared to controls. (D) There was no significant difference in wakefulness (average activity per waking minute). (E) dilp2-3,5 mutants slept more at night and less during the day than controls. (F) Minutes of sleep per 30 min (25 d wDah n = 48, dilp2-3,5 n = 31). (G) Day and night sleep of dilp2-3,5 mutants were interrupted by fewer waking periods compared to controls. (H) dilp2-3,5 flies had longer sleep bouts during the night. (I) Longer sleep bouts were more prevalent in dilp2-3,5 mutants (age 25 d). (J) wDah control flies, but not dilp2-3,5 mutants, show a significant age-related increase in night sleep bouts (age 10 d, 25 d, 45 d, 55 d, and 65 d). (B–F) wDah , n = 31, 43, 46, 26, and 31 for ages 10 d, 25 d, 45 d, 55 d, and 65 d, respectively; dilp2-3,5, n = 31, 31, 32, 29, and 43 for ages 10 d, 25 d, 45 d, 55 d, and 65 d, respectively. Kruskal Wallis test with Dunn's multiple comparison (selected pairs). ***p<0.001, **p<0.01, and *p<0.05. Error bars represent s.e.m.