Biochemical and histological changes in the brain tissue of spotted murrel, <Emphasis Type="Italic">Channa punctatus</Emphasis> (Bloch), exposed to endosulfan |
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| Authors: | Kamal Sarma A K Pal N P Sahu S C Mukherjee Kartik Baruah |
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| Institution: | (1) Division of Fisheries Science, Central Agricultural Research Institute, ICAR, Port Blair, 744101, India;(2) Division of Fish Nutrition and Biochemistry, Central Institute of Fisheries Education, Mumbai, 400061, India;(3) Division of Fish Pathology and Microbiology, Central Institute of Fisheries Education, Mumbai, 400061, India;(4) Laboratory of Aquaculture and Artemia Reference Centre, Department of Animal Production, Ghent University, 9000 Ghent, Belgium; |
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| Abstract: | The present experiment was conducted to establish the relationship between selected physiological parameters and histological
responses of Channa punctatus brain tissue to endosulfan exposure. The fish (35.6 ± 0.7 g) was exposed to sublethal endosulfan concentration (8.1 μg l−1) for a period of 12, 24, 36, 48, 72, and 96 h. Results showed that brain glucose level increased significantly after exposure,
indicating a hyperglycemic state of the fish. Brain vitamin C level decreased with an increase in the exposure time. Acetylcholine
esterase and adenosine triphosphatase enzyme activities also showed a significant reduction upon endosulfan exposure. Brain
histopathology after 96 h endosulfan exposure showed that the apical lobe of the cerebrum (the only portion examined) had
mild necrosis. Focal area of gliosis could be seen in the cerebrum, which were absent in the control fish. The results indicate
that exposure of sublethal concentration of endosulfan to C. punctatus may have a direct effect on the histology of the fish's brain tissue, thereby affecting its metabolism. |
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