The present study offers some important information into the interaction between the aqueous exposures to silver nanoparticles (NPs-Ag) with dietary active charcoal on the performance and physiological functions of Nile Tilapia, Oreochromis niloticus, challenged with heavy metals. A 50-day rearing attempt included 7 groups were performed as follows: CG: fish did not aqueous expose to NPs-Ag and fed a basal diet without active charcoal. G1 (NPs-Ag10), and G2 (NPs-Ag20): fish were aqueous exposed to 10 and 20 µl/l of NPs-Ag. G3 and G4: fish were exposed to the NPs-Ag10 by adding 30g and 15 g/kg of dietary charcoal to the basal diet respectively. G5 and G6 fish were exposed to the NPs-Ag 20 by adding 30g and 15 g/kg of dietary charcoal respectively. A 315 juvenile with an initial average weight of 3.55 g were randomly distributed into 21 plastic tanks with a capacity of 30 litters. A basal diet of 30% crude protein was used and fish fed at 4% of their biomass. The water exchange rate was 20% every 3 days with adjusting the doses of NPs-Ag in each tank. The results revealed that the growth performance and antioxidant indices of fish exposed to the lower NPs-Ag levels and 15 g/kg of dietary charcoal improved significantly compared to other treatments. Wherein, G4 the rate had the highest growth, the best level of antioxidant indicators, and the highest survival after the challenge with copper sulfate.
Key wards: silver nanoparticles, active charcoal, heavy metals, Oreochromis