HISTOPATHOLOGICAL CHANGES AS ALTERATIONS, A BIOMARKER STUDY IN THE FISH CATLA CATLA EXPOSED TO SUBLETHAL CONCENTRATIONS OF CYFLUTHRIN, A SYNTHETIC PYRETHROID

Abstract

The fish Catla catla exposed to a synthetic pyrethroid Cyfulthrin, type II category with a cyano group in sublethal concentration (1/10th of LC50 values of 96 hrs) 0.14 mg/L for 10 days. The toxicant had effected on the entry point gill, rendering the fish not to have any normal intake of oxygen and finally the fish succumb to death. The important metabolic organ, liver got effected wherein the metabolism is impaired and the growth of the fish is also not normal. At the exit point, the aminotellic fish kidney, both haemopoietic and excretory organ got also effected and that resulted impairment of excretion function apart from haemogenesis. All will be discussed with the available literature.