PMID: 20120492Feb 3, 2010Paper

Manifestation of carbaryl toxicity on soluble protein and histopathology in the hepatopancreas and gills of the prawn, Macrobrachium malcolmsonii

Journal of Environmental Biology
P Saravana Bhavan, P Geraldine

Abstract

The present study examined alterations in the protein pattern and histopathology of the hepatopancreas and gills of Macrobrachium malcolmsonii following exposure to Sevin, the commercial grade of carbaryl (1-Naphthylmethyl carbamate) pesticide. Juvenile prawns were exposed to sub-lethal concentrations 5.15 microg l(-1), 7.73 microg l(-1) and 15.47 microg l(-1) of carbaryl for 21 days. Samples were obtained from the hepatopancreas and gills of prawns. The concentration of buffer soluble protein in tissues of test prawns was significantly (p<2.5%) lower than the control. This suggests that proteins were utilized to generate energy in order to withstand carbaryl induced toxic stress. Polypeptide bands of different molecular mass (150-10 kDa) in tissues of test prawns stained less intensely than those in control. This indicates that carbaryl toxicity caused protein degradation in tissues of test prawns. The histology of the hepatopancreas and gills showed few marked pathological changes in prawns exposed to carbaryl. These include rupture of the basal laminae, abnormal infiltration/aggregation of hemocytes in the interstitial sinus of the hepatopancreas and in the hemocoelic space of gill lamellae, fused gill lamellae and necrosis ...Continue Reading

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