Health risk assessment of heavy metal accumulation in the food fish, Channa striata from Krishna river, Andhra Pradesh

Abstract

The new threats to human health from heavy metals are associated with exposure to some selected metals. The study identifies and assessment of the accumulation and levels of five heavy metals (Cd, Cr, Ni, Pb and Zn) in food fish Channa striata of Krishna river, collected from three stations during four seasons of the year i.e June,2019- May2020. The range of metal concentrations recorded were: Cd 1.12-3.35, Cr 1.41-2.89, Ni 1.51 -3.72,Pb 3.29- 7.69 and Zn 13.8 – 29.1 in case of muscle and in case of liver goes to Cd 2.21 – 4.43, Cr 1.74- 3.68, Ni 1.96-3.71, Pb 3.52- 8.09 and Zn 14.5 – 32.6. The spatial variation in concentrations and comparison among seasons indicated that there are significant differences in the concentrations of metals in the muscle and liver for all seasons. The mean metal concentrations varied temporally; metal masses were relatively constant with fluctuations in metal concentrations related to fluctuations in metal body burdens. The metal contamination had significantly higher in both the tissues of Zn and Pb concentrations. According to the guideline values, the concentrations of metals studied do not pose any threat to the health of fish consumers.