Figure 2
From: The nightscape of the Arctic winter shapes the diving behavior of a marine predator
Monthly density plots of the daily mean dive depths recorded by (a) the five high-resolution tags and (b) the eight low-resolution tags. The monthly mean values for day and night are indicated in each panel and are represented by the horizontal dotted lines. The significance of the associated Kolmogorov–Smirnov tests is indicated in each panel (ns not significant, ***p < 0.001, **p < 0.005, *p < 0.05). The number of days for which the mean depth was calculated was added on top of each panel in (a,b) for day (beige) and night (grey), respectively. Note that December was discarded from the analysis in (b) due to a very low number of dives recorded. (c) Stacked histograms of the dive frequency recorded by the five high-resolution tags calculated as the mean hourly dive rate per depth class across months and animals. Note the day/night coloration at the bottom of each panel in (c). Average monthly daylength (hours of daylight) was added on the top of each month.
