The hematological improvement of rainbow trout (Oncorhynchus mykiss) during dietary supplementation with vitamin C after exposure to zinc nano-particles
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Date
2017
Metadatos
Mostrar el registro completo del ítemAbstract
The aim of this study was to examine the adverse effects of zinc nanoparticles on hematological indices of trout and investigate the improvement of these indices after vitamin C treatments. This study assesses the protective role of vitamin C in fish exposed to ZnO NPs. Two concentrations of ZnO-NPs (40 and 80 mg L-1) and two doses of vitamin C (400 and 800 mg per kg of feed) were used to treat 162 specimens of Oncorhynchus mykiss. No mortality was observed during the test. After 5 and 10 days of exposure, hematological data were analyzed according to routine clinical methods. Statistical analysis showed significant changes in WBCs and RBC on day 10 (p<0.05). Values for HT and MCH were significantly higher in treatment 2 (normal diet+40 mg L-1 ZnO-NPs) and 9 (800 mg/kg Vit + 80 mg L-1 ZnO-NPs), and lower in treatment 3 (normal diet+80 mg L-1 ZnO-NPs) in comparison with the control group (normal diet+0 mg L-1 ZnO-NPs) (P<0.05). No significant differences of MCV and MCHC were observed (p>0.05), while significant increase in neutrophils and monocytes, and decrease in lymphocyte cells were recorded (p<0.05). ZnO-NPs stimulated the immune system of O. mykiss, but this effect did not have any lethality on this species at 40 and 80 mg L-1. Vitamin C in different concentrations could help to prevent rainbow trout from the toxic effects of this nano metal.Journal
Iranian Journal of Fisheries ScienceVolume
16Issue/Article Nr
1Page Range
pp.162-169Colecciones