Stable carbon (δ13C) and nitrogen (δ15N) isotope data from whiskers of seven adult male Australian sea lions sampled along the South Australian coastline.

Mean, variance and ranges (‰) shown for each animal. δ15N generally showed a distinction between animals east and west of Spencer Gulf/137°longitude. Individuals at Seal Slide and Seal Bay displayed variance in δ13C (in bold) approaching an order of magnitude greater than any other individual.