Bioaccumulation of lead in various tissues of the freshwater fish catla catla (hamilton, 1822)
A study was conducted to evaluate the level of heavy metal lead (Pb) in various tissues of adult Catla catla when exposed to a sub-lethal concentration of 6.52 mgL-1 (1/25th of 96 hrs LC50 value) for a period of 120 days of exposure. The bioaccumulation of lead in the tissues studied was increased with duration of exposure periods. The pattern of lead accumulation was in the decreasing order of kidney > liver > gill > ovary > testis > brain at the end of 120 days of exposure. Preferential accumulation of lead was also observed in the tissues under experimentation.