Accumulation of Heavy Metals in Tissues of Long Tail Tuna from Karachi Fish Harbour, Pakistan

The present study was conducted to investigate the contamination of Fe, Mn, Cu, Zn, Ni, Pb, Cd, and Cr in the tissues of commercially important fish Thunnus tonggol and to evaluate risks to human health associated with seafood consumption. The results from this study showed that the concentrations of all metals measured except Cr were relatively high in the liver compared to the muscle, gills and gonads. High concentrations of Cr were present in the kidneys. Fe had the highest concentration compared with other metals tested in all tissues of followed by Cu and Zn. The highest mean concentration (µg/g) of Fe 36.43±11.41, M