Zinc isotopes from archaeological bones provide reliable tropic level information for marine mammals

McCormack et al. present the first comparison of archaeological δ66Zn from bone material compared with traditional δ15 N and δ13 C values derived from collagen samples over a large geographic area. This study shows that the inclusion of δ66Zn analysis can provide otherwise inaccessible supplementary dietary information and more robust trophic level estimations.