North Atlantic Blue and Fin Whales Suspend Their Spring Migration to Forage in Middle Latitudes: Building up Energy Reserves for the Journey?
Figure 6
GAM estimate of ARS speed of fin whales during 24-hours in each geographic area.
A. Azores area. B. area north of 56°N. Solid line represents the estimate and dashed lines the estimate ±2 SE. Grey areas correspond to sunrise and sunset intervals (mean ± SD).