Fig. 8From: A critical assessment of marine predator isoscapes within the southern Indian OceanPlasma δ13C (left) and δ15N (right) isoscapes of three penguin species breeding at Marion Island, Prince Edward Archipelago calculated as the mean of 1000 bootstrapped surfaces interpolated using ordinary kriging which randomly sampled 9 individuals from each penguin species to account for different number of individuals per species. Isobaths (grey) are shown at 200 m intervals with 200 m isobath in blackBack to article page