Abstract
This study investigated edible and commercially valuable fish species viz. Gudusia
chapra and Eutropiichthys vacha, for the muscular tissue bioaccumulation of selected heavy
metals (Pb, Cd, Cr, Zn, Cu, and Mn) and their human health risks. A total of 50 fish species (25
individuals each) were examined from the Padma River, Bangladesh, and subjected to heavy
metals presence and loads by detection after wet digestion of samples. The results displayed the
hierarchy of average levels of the targeted metals in G. chapra in declining order of Zn (14.37)
> Cu (12.63) >Mn (1.39) > Cr (0.64) >Pb (0.38) > Cd (0.03 mg/kg) whereas, Zn (11.89) > Cu
(11.18) >Mn (1.69) > Cr (0.52) >Pb (0.19) > Cd (0.01 mg/kg) in E. vacha. The t-test indicated
significant differences (P<0.05) between Pb and Zn, while, the inter-species relationships were
not significant for the other metals investigated. The estimated average daily dose (ADD) intake
remained below the reference dose as recognized by the international guidelines of WHO,
FAO, and USEPA. Furthermore, the hazard quotient (HQ) and hazard index (HI) outcomes
labelled a non-carcinogenic threat to the consumers. In conclusion, this study provides useful
insights into the identification of potential risks of these commercially valuable fishes to the
continuous consumption of fish flesh originating from a contaminated water body may lead
to heavy metals toxicity leading to mental retardation, kidney tissue damages, cancerous cell
growth, and even death in case of chronic exposure.
Dil Afroza Khanom, Amirun Nesa, Lubna Alam, Muhammad Abu Sayed Jewel, Usman Atique, Muhammad Ayenuddin Haque, Alok Kumar Paul, Sonia Iqbal. (2020) Muscular Tissue Bioaccumulation and Health Risk Assessment of Heavy Metals in Two Edible Fish Species (Gudusia chapra and Eutropiichthys vacha) in Padma River, Bangladesh, Punjab University Journal of Zoology, Volume 35, Issue 1.
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