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Figure 2 | Frontiers in Zoology

Figure 2

From: Linking melanism to brain development: expression of a melanism-related gene in barn owl feather follicles covaries with sleep ontogeny

Figure 2

Time spent in sleep-wakefulness states and mean bout durations are age-dependent. Time spent in (a) wakefulness, (b) non-REM sleep, and (c) REM sleep, mean bout durations for (d) wakefulness, (e) non-REM sleep, and (f) REM sleep, and (g) mean REM sleep latency (n = 66). The following correlations with age were statistically significant: duration of bouts of wakefulness (Pearson’s correlation: r = 0.41, p = 0.0006) and non-REM sleep (r = 0.46, p = 0.0001), time spent in REM sleep (r = -0.40, p = 0.0008), and mean REM sleep latency (r = 0.47, p < 0.0001). None of the other variables correlated significantly with age (p-values > 0.18). Similar results were obtained when we calculated mean values for each nest.

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