Abstract

Nowadays, the use of nanotechnology in various industries is increasing. The application of nanoparticles in aquaculture can be investigated both to treat diseases and to control the bacterial load of water. In this research, nanoparticles were prepared by the sol-gel method. The particle size was determined by scanning electron microscope(SEM) and X-ray diffraction(XRD). To determine the possibility of using these materials directly in aquaculture, nanoparticles with concentrations of 1, 5, and 10 ppm were added to aquarium water containing redfish. 60 pieces of fish were divided into 3 treatments and 1 control group, then for 1 month, the fish were exposed to the mentioned doses was extensive in the secondary lamellae and no change was observed in the liver cells, local necrosis was observed at doses of 5 and 10, while this was not observed for doses of 1 ppm Due to the mild side effects of zinc oxide nanoparticles, it can be used as a disinfectant without side effects in fish breeding centers. The results of this research can be used in aquarium conditions.

Keywords: ZnO, Chronic dose, Histopathology, Goldfish