Muhammad Siraj, Musarrat Shaheen, AftabAlam Sthanadar, Ahsan Khan, Douglas P. Chivers, Ali Muhammad Yousafzai
Department of Zoology, Islamia College Peshawar (A public Sector University) Khyber Pakhtunkhwa, Pakistan
Department of Biology, University of Saskatchewan, Canada
Key words: Bioaccumulation, heavy metals, carnivorous fish, omnivorous fish.
We examined Zn, Ni, Cr, Cu and Pb in the muscle, intestine, liver, skin and gills of two fresh water species, Aorichthysseenghala (carnivorous) and Ompokbimaculatous (omnivorous) from a natural water body. Our results showed that heavy metals accumulation was in the order of Zn>Cr>Pb>Cu>Ni>Cd in both Aorichthysseenghala and Ompokbimaculatous. Heavy metals abundance in different organs of Aorichthysseenghala was in the order of skin>liver>intestine>muscle>gills. However, heavy metals abundance in different organs of Ompokbimaculatous was different which was gills>liver>skin>intestine>muscle. Different tissues, of Ompokbimaculatous accumulated was 29.85%, 19.59%, 44.94%, 15.34% and 13.83% more Ni, Cr, Cu, Cd and Pb as compared to Aorichthesseenghala.So our findings suggest that omnivorous fish bioaccumulate more heavy metals than the carnivorous fish in natural habitats. Although muscles accumulated least level of heavy metals than other tissues, but even then levels of Ni, Cr, Cd, and Pb in this tissue on comparison exceeded the US, RDA limits and poses a health concern for these fish consumers. Aim of the study was to determine the metal accumulation pattern of two fish species with different feeding habits, in the same natural habitat and its possible hidden threat for fish consumer.
Get the original articles in Source: Volume 4, Number 3, March 2014 – JBES
Published By: International Network for Natural Sciences