Abstract

HISTOPATHOLOGICAL STUDIES IN CHANA PUNCTATUS AND MACROBRACHIUM ROSENBERGII EXPOSED TO SONATA

S. Swetha* and Dr. E. Narayana

Abstract

The present study is aimed to assess the histological damage caused to the fish Chana punctatus and prawn Macrobrachium rosenbergii were exposed to lethal concentration (15.39ppm &12.09ppm) to Sonata(Fungicide). Light microscopic studies exhibited severe histopathological changes in the Gill, Liver and Brain. The histopathological changes in the gill of fish include: epithilial lifting, degenerated secondary lamella, curling of secondary filaments and degenration of epithelial cells and gill of prawn include Detached cuticle, Degeneration of epithelium in secondary gill lamelle, Necrosis., Infiltrations of haemocytes, Edema reupture of epithelial cells., Hypertrophy, Hyperpalsia., Disarrangement of secondary gill lamellae, Disruption of pillar cells and Enlargement of scondary gill lamellae. The histopathological changes in the Liver of fish include: blood cells among haptocytes, appearance of blood streaks among hepatocytes, formation of vacuoles and degeenrated hepato pancreatic tissue and Liver of prawn include haemorrage, vacuoles, necrosis and blood vesseles. The changes in the Brain of fish include: Degenerated dorsal olfactory area, degenerated Ventral olfactory area, blood streeks and degenerated septal area and brain of prawn include Pyknotic nuclei, Pyknotic nuclei with dense eosinophilic cytoplasamm, Vacuolated spaces, Prolifiration of gilala cells and Gliosis and nodule formation.

Keywords: Sonata, Hypertrophy, Hyperpalsia, epithilial lifting, Pyknotic nuclei, Gliosis.