Fig. 2
From: A critical assessment of marine predator isoscapes within the southern Indian Ocean
Plasma δ13C (left) and δ15N (right) isoscapes of a) wandering, b) grey-headed and c) sooty albatrosses, and d) northern and e) southern giant petrels breeding at Marion Island, Prince Edward Archipelago (black triangle) interpolated using ordinary kriging from the isotopic values of the respective birds’ plasma which were simultaneously tracked with GPS data loggers. Black points represent an individual’s mean foraging location. Positions of the sub-tropical (STF), sub-Antarctic (SAF) and Antarctic polar (PF) fronts are indicated