Trace metal accumulation in Clarias gariepinus (Teugels) exposed to sublethal levels of tannery effluent.
The concentration and distribution of Cr, Cu, Pb and Zn among the tissues of a freshwater fish, Clarias gariepinus exposed to combined (composite) tannery effluent was investigated at two sublethal concentrations (2 and 6%) in static bioassay for 8 weeks. The distribution of the four metals in fish was of the order of Pb > Cr > Cu > Zn and the accumulation was found to be dose- and time-dependent. The metal levels in the liver were significantly higher (P > 0.05) than other tissues. This was followed by the gill and the gut. Relatively low accumulation of these metals was found in muscle tissue.
Gbem
T T
TT
Department of Biological Sciences, Ahmadu Bello University, Zaria, Nigeria. gbemtt@abu.edu.ng
Balogun
J K
JK
Lawal
F A
FA
Annune
P A
PA
D000818:Animals; D004064:Digestive System / Q000737:chemistry; D004305:Dose-Response Relationship, Drug; D005399:Fishes / Q000502:physiology*; D005880:Gills / Q000737:chemistry; D008099:Liver / Q000737:chemistry; D019216:Metals, Heavy / Q000009:adverse effects / Q000493:pharmacokinetics*; D014018:Tissue Distribution; D014874:Water Pollutants, Chemical / Q000009:adverse effects / Q000493:pharmacokinetics*
D019216:Metals, Heavy; D014874:Water Pollutants, Chemical