The ratios of stable isotopes 18 O/ 16 O and 13 C/ 12 C, in sagittal otolith carbonate from two tropical demersal teleosts, red emperor Lutjanus sebae and Rankin cod Epinephelis multinotatus , from several locations in northern Western Australia, differed between sites. On a broad scale, fish from the four locations, Shark Bay, Ningaloo, Pilbara, and Broome had stable isotope values that were sufficiently different to indicate...

The 18 O/ 16 O and 13 C/ 12 C ratios in the otolith carbonate of pink snapper Pagrus auratus and tailor (bluefish) Pomatomus saltatrix , from several locations along the Western Australian coast, indicated that pink snapper stocks are location specific but that tailor stocks are less so. The hypersaline Shark Bay, on the coast of Western Australia, generated strongly characteristic isotopic signatures which serve as natural ta...