Abstract

HISTOPATHOLOGICAL STUDIES ON HYPOPHYSIS AND OVARY OF FRESH WATER FISH GLOSSOGOBIUS GIURIS (HAMILTON)

*S.Y. Narayanaswamy, M. Ramachandra Mohan

ABSTRACT

Histopathology of the Hypophysis and Ovary of fish G. giuris was observed during preparatory phase, on the treatment with sublethal concentrations of Malathion ( 0.05 , 0.25 and 0.5 ppm) for 24, 48, 72 and 96 hrs intervals, histology represents a useful tool to assess the degree of pollution, particularly for sub-lethal and chronic effects. In this paper, propose a standardized tool for the assessment of histological findings which can be applied to different organs. The results of the present study showed morphological changes in the cell structure. Investigation on Hypophysis and Ovary cells showed degranulation and hypertrophy of cells and nuclei, after the fishes were exposed to Malathion treatment, these changes further intensified with 0.25 ppm treatment through the appearance of extensive intercellular spaces. In higher concentration of Malathion treatment with 0.5 ppm for 24 hrs, the cells showed various stages of degranulation which were distributed sparsely. A reduction in the number and diameter of the Hypophysis and Ovary cells, which indicates possible reduction in the synthesis of hormones.

Keywords: Malathion , G.giuris, Ovary and Hypophysis