Accumulation of Metals in Gill Tissues of Notopeterus notopeterus Under Fluoride Stress

摘要

Sub lethal physiological effects of fluoride on macro and micro metals residue accumulation in gills tissues were measured in Notopeterus notopeterus from fresh water reservoir. Fishes were bare to two concentrations (1.5 and 3 g/70 L) of fluoride for 24, 48 and 72 h and 45 days beside the control group in separate aquarium. High concentration of essential and non essential metals showed that fluoride induced permeability in gills tissues results in mineral nutrients unbalancing due to free movement of non essential metals (Pb, Hg, As and Cd) in gills of fish under studied. This may be related with permeability of gills epithelium which significantly affects the scale loss due to fluoride mobility with increase in metal accumulation in gill tissues of fish. It was observed that in gill tissues the bioaccumulation factors of Mn, Zn, Fe and Co were affected as compared to control fish, which ultimately associated with the physiological processes of fish with dissolved gills tissues structure.