Fig. 2
From: Exposure to constant artificial light alters honey bee sleep rhythms and disrupts sleep
Bee sleep follows a roughly circadian pattern over the entire experiment, but changes after about 79 h in bees under constant illumination. The Light: Dark treatment refers to 12 h of light followed by 12 h of dark, a standard cycling. (A) Over the entire experiment, bee sleep changed significantly over time (P = 0.0003). (B) From 79 h until the end of the experiment, there was a significant interaction of treatment x time (P = 0.0017) because those exposed to constant light slept less than bees kept in the dark, the normal state inside the nest. During this interval, there was no significant effect of treatment on sleep (P = 0.76) and no significant effect of time (P = 0.73). All data points are shown, along with best-fit spline curves and 95% confidence intervals.
