Document Type : Research Paper
M.Sc. in Fisheries, Fisheries Department, Faculty of Natural Resource, University of Guilan, Sowmeh Sara, Iran
Assistant Professor in Fisheries Department, Faculty of Natural Resource, University of Guilan, Sowmeh Sara, Iran
Professor in Fisheries Department, Faculty of Natural Resource, University of Guilan, Sowmeh Sara, Iran
Associate Professor in Department of Biology, Faculty of Science, University of Guilan, Rasht, Iran
Associate Professor in Department of Fisheries, Faculty of Natural Resources, University of Kurdistan, Sanandaj, Iran
The aim of this study was to evaluate the toxicity of iron oxide nanoparticles on the gill antioxidant defense system of juvenile common carp (Cyprinus carpio). The juveniles (17±0.6g) were exposed to different concentrations (10, 30 and 50.0 mg.L-1) of waterborne iron oxide nanoparticles for 0, 1, 7 and 14 days and then the levels of antioxidant enzymes activities including superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx) and malondialdehyde (MDA) were evaluated in gills. The results showed that exposure to nanoparticles led to a significant increase in MDA levels and time-related changes in antioxidant enzyme activities (p < 0.05). Therefore, the biomarkers such as antioxidant enzymes and MDA level can be used as a suitable index for monitoring oxidative stress in carp.