Skip to main content
. 2008 Oct 23;5(1):69–72. doi: 10.1098/rsbl.2008.0484

Figure 2.

Figure 2

DVM signal strength and depth range during the winter in (a) Rijpfjorden and (b) Kongsfjorden. LD, light dark (difference between day and night); DD, dark dark (no apparent difference between day and night, Sun below the horizon). Each box represents a specific depth and time interval. The darker the shading at any particular depth, the more synchronized the 24-hour DVM signal. White boxes indicate no detectable DVM signal. All shaded boxes have a detectable DVM rhythm that is significant above a 99 per cent confidence interval.