عنوان مقاله [English]
Aim of this study was to investigate the protective effect of pre-treatment of bacteria pediococcus acidilactici and oligosaccharide raffinose on carcass composition of Goldfish (carassius auratus) in exposure to nano silver. Accordingly, 250 fishe with a average weighing of 26.3±0.18 fed for 6 weeks in four treatments and each treatment with three replications including diet without food supplement (control 1), probiotic diet of bacteria with a concentration of 107 colonies per gram (treatment 2), food containing probiotic raffinose (1 g/kg) and synbiotic (treatment 4). After the end of the feeding period, 50% of the nano-silver concentration (0.5 mg / L) was added to the treatments for 14 days. At the end of the 14-day exposure, blood and carcass sampling was performed. Analysis of the data showed that there was no significant difference between moisture content, ash, protein and carcass fat (P <0.05). According to the results obtained from the tested indices, Rafinose supplementation had the greatest effect on carcass fat. Among the supplements, the synbiotic food with effect on carcass protein, carcass ash and carcass moisture, among food supplements has more effect.