Selected bioaccumulative contaminants were investigated in wild kai (food) of cultural, recreational and economic importance to the indigenous Māori of South Canterbury, New Zealand. Contaminants of concern included dieldrin, ΣPCBs, p,p′-DDE, mercury and arsenic, levels of which were analysed in important kai species including eel (Anguilla sp.), brown trout (Salmo trutta), black flounder (Rhombosolea retiaria) and watercress (Nasturtium officinale) from important harvesting sites in the region of South Canterbury. Calculations revealed a lifetime excess cancer risk was associated with consumption of eels, trout and flounder. In another analysis, a non-cancer chronic health risk was associated with consumption of eels and trout. A cumulative lifetime cancer risk assessment demonstrated a potential health risk in consuming some species, even at low consumption rates. The study authors recommend that dietary consumption limits be established for harvest sites within the study region.
