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Toxic effects of Cadmium and Popper on Gillsurface Ultra structure of Anabas testudineus Bloch: A scanning Electron Microscopic Study

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Author Affiliations

  • 1Department of Ecology and Environmental Science, Assam University, Silchar, Assam, INDIA

Int. Res. J. Biological Sci., Volume 3, Issue (11), Pages 18-22, November,10 (2014)

Abstract

The effects of a 96 hexposure to 40.898 mg L-1 Cd and 0.980 mg L -1Cu, which represented the 96 h LC50 of these two metals, on gill surface ultra structure of Anabas testudineus was studied using scanning electron microscopy. Fish gills comprise primary and secondary lamellae, which have three different cell types: epithelial pavement cells, chloride cells and mucous cells. The changes in gill surface ultra structure were characterized by fusion of adjacent secondary lamellae, oedema, disruption of gill epithelium, and excretion of large amount of mucous on lamellar surface. These alterations demonstrate the morphological as well as physiological responses of the fish when exposed to Cd and Cu. The study shows scanning electron microscopy to be useful tool for identifying morphological biomarkers on the gills of Anabas testudineus.

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