African Journal of Biotechnology Vol. 5 (10), pp. 974-982 ISSN 1684-5315.
The concentrations of heavy metals in two tropical fish species (Malapterurus electricus and Chrysichthys nigrodigitatus) from Ogba river in Benin City, Nigeria, were investigated between November 2002 and October 2003 in order to ascertain the pollution status of the river . The results showed varying levels of accumulation of Cu, Mn, Zn, Pb, Cr, Ni, and Cd in the fishes.