Morphological and liver histological effects of ZnO nanoparticles on Mozambique Tilapia

Abstract

Three different concentrations (30, 50 and 70ppm) of ZnO NPs were exposed to Oreochromis mossambicus. Treated fishes showed various skin discolouration and ulceration due to necrosis condition of muscle tissues, damages in Pectoral, Caudal and Dorsal fins than control. HSI values of treated groups showed decreasing HSI results for 30ppm, 50pp, and 70ppm groups as increasing concentrations. Liver Histological results showed congested portal vein (CPV), necrotic hepatocytes and vacuole formation, accumulation of blood cells degradation of liver tissues (DL) in treated fishes. As a novel attempt this study reveals the impact of ZnO NPs on morphology of O.mossambicus.