Uptake and Bio-Concentration of Manganese in the African Catfish, Clarias gariepinus

Adult African catfish, Claria gariepinus body weight >500g were exposed to two concentrations of manganese (T = 6.76mg/l and T = 8.45 mg/l) and 12 the uptake and bioconcentration of Mn at these concentrations were monitored under laboratory conditions. Tissues obtained from the specimens were analyzed for Mn at 24h interval for 144h with the use of Pye Unicam 960 atomic absorption spectrophotometer with deuterium correction. The pattern of Mn uptake in the tissues was in the order: gill>liver>flesh. Highest concentration of 52.52mg/g was obtained in gill T at 120h while the least