Figure 5.

Effect of HS-vri induction on locomotor activity. Flies (w¹¹¹⁸ and HS-vri) were placed into the DAM apparatus to measure locomotor activity. The average number of beam crossings per minute binned in hourly units was calculated and plotted as a function of elapsed time. The black horizontal lines under the Figure indicate dark periods (hours 12–24 and 36–48) and constant darkness (hours 60–120). The red bar indicates constant darkness plus heat-shock (a 20°C to 28°C chronic shift beginning at the 120th h). The N sizes for each group are shown.