Effect of nanosilver particles on hatchability of rainbow trout (Oncorhynchus mykiss) egg and survival of the produced larvae

 Effect of nanosilver particles was studied on the hatchability of rainbow trout (Oncorhynchus mykiss) egg and survival of the produced larvae at about ۱۲ºC. In the first experiment the water-based nanosilver particles was used at concentrations of ۰.۵, ۱, ۲ and ۴ mgL-۱ for ۳۰ minutes per day starting ۲۴ hour post egg incubation until the hatching time. The mean percentage of hatchability reached in ۲۷.۶±۰.۲, ۳۸.۲±۰.۱, ۴۱.۶±۰.۴ and ۴۸.۶±۱.۵ in troughs treated with ۰.۵, ۱, ۲ and ۴ mgL-۱ nanocid, respectively compared with ۶۴.۷±۰.۲ % for trough treated with malachite green at ۲ mgL-۱ as positive control (P<۰.۰۵) and ۵.۱± ۰.۲ % for trough without treatment (untreated group) (P<۰.۰.۵). In the second experiment the effect of the nanosilver particles was evaluated in the form of nanosilver dressing i.e. coating nanocid on the surface of the incubator troughs. The mean percentage of hatchability was ۶۹.۴±۰.۱% compared with ۵۲.۵%±۰.۱ recorded for normal control (trough without nanosilver dressing) (P۰.۰۵). These data suggest a possible application of nanosilver particles in aquaculture sector particularly using incubator troughs of trout containing nanosilver materials.