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Histopathology Changes In Indian Catfish Clarias batrachus Exposed To Zinc Chloride

Authors:A.Palanivel, N.Arunpandiyan
Int J Biol Med Res. 2019; 10(2): 6730-6734  |  PDF File

Abstract

Heavy metal pollution poses a great threat to fishes. When fishes are exposed to elevated levels of metal in the polluted aquatic ecosystem, they tend to take these metals up from their direct environment. The fish constitutes a valuable commodity from the standpoint of human consumption. Heavy metal toxicants are accumulated in the fish through the general body surface which affects their life support system at molecular and biochemical levels. Once this toxic substance enters the body of fish, they damage and weaken the mechanism concerned leading to physiological, pathological and biochemical disorders. Most trace metals are important for the customary functioning of the physiological processes in fish. The abnormally high concentration of metals can, however, cause cellular and histological changes. An investigation of the effect of heavy metals like zinc chloride on Freshwater fish Clarias batrachus carried out in the lab. Fishes deliberation 10 ± 0.5 g and 10 ± 1 cm length were exposed to sublethal concentrations (derived, supported acute toxicity tests) of zinc chloride 0.19, 0.09, 0.05 and 0.03 ppm for 30 days. throughout this catfishes were fed with unnaturally ready food. On the 10th, 20th, 30th-day fishes were taken out, sacrificed and also the tissues of gill and liver were excised out. the full autopsy was completed in but 4 minutes. The result showed that the degree of distortion of the gill, the liver was proportional to the exposure amount and concentration of the metals was found to be dose and time-dependent.