Figure 2
From: Natural selection on sleep duration in Drosophila melanogaster
Sleep changes over time in unselected control populations. Sleep duration in the unselected controls is contrasted at Generation 75, Generation 13, and Generation 0. The mean proportion of night and day sleep duration are plotted in 30-min bins across time for all flies in the experiment; mean night and day sleep are quantified in bar charts. Error bars are standard errors of the mean. (A) control replicate 1 (n = 164, 161, and 184 flies in generations 0, 13, and 75, respectively). (B) control replicate 2 (n = 197, 185, and 189 flies in generations 0, 13, and 75, respectively. Means with different letters are significantly different by post-hoc Tukey test (P < 0.05).
