Figure 6

Mean current velocities and directions in the study region illustrating persistent current features. Every 25th vector is plotted. Current velocities and directions were averaged across the 4 simulated seasons during the chick-rearing period (December–March) and over the top 150 m of the water column. Arrows illustrate major current systems that play roles in facilitating or preventing krill population connectivity. Arrows size is not indicative of flow strength or relative importance. Black shapes illustrate the Voluntary Restricted Zones (VRZs) established by the Association of Responsible Krill Harvesting Companies. Differences in VRZs along the coastline reflect differences between modeled coastlines and observed coastlines. Numbered regions correspond to numbered rose plots around in the plot margins. Rose plots illustrate the distribution of current bearings from every grid point within the corresponding region in 30 degree bins. Bar heights indicate the relative frequency of that bearing and color corresponds to the current systems labeled on the main figure. Bearings illustrate the direction water was moving during the chick-rearing period at 6 depths (10, 25, 50, 75, 100, 150 m) across 4 simulated seasons.