Abstract:
This thesis determined the level of mercury and cadmium in selected
biological species namely tilapia (Tilapia zillit), mudfish (Clarias slIbmargillatlls),
prawns (Pellaeus //Iolladall) , crabs (Carcilllls 11laellas) and Molluscs Periwinkle
(Gastropod) from the River Pra Estuary using.
The samples were taken every fortnight from four sampling sites from
Beposo to Shama Beach in the Western Region of Ghana for two months. That is
form 10105/06 to 29106/06. During the period a total of eighty (80) samples were
collected and analyzed and the levels of mercury determined in the muscles of the
various biological species were between 0 and 0.00808 ± 0.0009hlg/g while the
levels of cadmium were between 0.0010 I ± 0.00013 flg/g and 0.02024 ± 0.00263
flglg. But all the values are well below European Union acceptable limits of
0.05flg/g.
