Cadmium, Copper, Lead and Zinc Tissue Levels in Bonga Shad (Ethmalosafimbriata) and Tilapia (Tilapia guineensis) Caught from Imo River, Nigeria
No Thumbnail Available
Files
Date
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Academic Journals Inc., USA
Abstract
Description
An investigation of the muscle-liver tissue concentrations of heavy metals
(Cd, Cu, Pb and Zn) in two commercially important fish species (EthmalosafimbriataBonga
shad and Til apia guineensis-Tilapia) caught from three stations within Irno River was
carried out in 2004. Heavy metal contents varied significantly (p>0.05) depending on the
fish species and on the type of tissues. The concentrations of the essential elements
(Zn, Cu) were relatively higher in the muscle and liver tissues than the non-essential metals
(Pb, Cd). The trends in tissue elemental concentrations in both species of fish was
Zn>Cu>Pb>Cd. Heavy metal levels in liver tissues of both fish species were comparatively
higher than levels obtained from muscle tissue. In general, T. guineensis showed higher levels
of metal concentrations thanE. fimbriata. The concentrations of Cu, Cd, Pb and Zn in both
fish species were within tolerance limits that are safe for human consumption.
Keywords
QD Chemistry