Impact of lead nitrate on the gills of tiger shrimp, penaeus monodon exposed to sublethal concentrations leading to histological changes

In the present study the tiger shrimp, Penaeus monodon were exposed to three sublethal concentrations of Lead nitrate (1.66, 3.33 and 6.60 mg/L) for a period of 24 hrs,48 hrs,72 hrs,96 hrs respectively. The Gills of the shrimps were then dissected out and processed for light microscopy studies. Exposed shrimps were found to result in several alterations in the histoarchitecture of Gill. The alterations included: necrosis of the epithelial cells of the Gill, hemocytic infiltration in the interlamellar spaces, were observed in the Gills. The results obtained suggest that the Gills of shrimps exposed to sublethal concentrations of Lead nitrate were structurally altered. Such alterations-could affect vital physiological functions, such as absorption, storage and secretion of the Gills, which in turn could ultimately affect the survival and growth of Penaeus monodon.