EFFECTS OF DYEING AND PRINTING INDUSTRY EFFLUENT ON ACID AND ALKALINE-PHOSPHATASE IN FEW VITAL ORGANS OF A COASTAL TELEOST, PERIOPHTHALMUS DIPES

Experiments were carried out to assess the dose and duration dependent effects of dyeing and printing effluent on the lysosomal enzyme, acid phosphatase and a membrane bound enzyme, alkaline phosphatase in five vital tissues viz. gills, intestine, liver, brain and muscle, of a co astal euryhaline teleost Periophthalmus dipes. Fishes were exposed to different effluent dilution viz. 0.1%, 0.5% and 1% for three test peri ods (2, 4 and 6 days) and the activity of the enzymes was estimated. T he results show both significant inhibition at the lower concentration s and stimulation in the higher effluent concentration. Significant do se and duration dependent changes occurred in the gills whereas, predo minant duration dependent changes were noticed in other tissues examin ed.