The Effects of Selenium Nanoparticles Enriched food on Sperm Quality and Fertilization of Rainbow Trout (Oncorhynchus mykiss) Male Breeders

In this study, the effects of selenium nanoparticles on the reproductive performance of rainbow trout breeders (Oncorhynchus mykiss) were investigated. A total of 84 male reproductive strains were selected from among the breeders of the Genetic and Genetic Research Center of Shahid Motahari Yasouj. After adaptation, the fish were divided into 4 experimental groups with 3 replications. Male broilers fed with commercial foods (without selenium nanoparticles) (control group) and male brooders fed diets containing 0.5, 1 and 2 milligrams of selenium nanoparticles per kilogram of diet. After evaluating the quantity and quality of sperm, replication and fertilization were performed for different groups using female oocytes. The results showed that the highest volume of sperm and the highest sperm density were observed in rainbow trout fed with 2 mg selenium nanoparticles per kilogram of diet. The lowest sperm volume was observed in the control and 0.5 mg selenium nanoparticles and the lowest sperm density was observed in the control group. The duration of sperm motility in fish fed diets containing selenium nanoparticles (0.5, 1 and 2 mg) was significantly higher than that of the control group fed with selenium nanoparticle diet. No significant difference was found between the percentage of sperm motility and spermatocrit between experimental groups. The highest percentage of fertilization, laceration and hatching of eggs were from rainbow trout breeders fed with 2 mg nano-selenium per kilogram of diet. In this study, the supplementation of the male breeder diet with selenium nanoparticles did not have a significant effect on progeny survival at the onset of active feeding. Selenium nanoparticles seem to have a positive effect on hatching eggs ob n embryos and larvae, but in the onset of active nutrition, there is no significant effect on the survival of larvae. selenium nanoparticles of diet improve the reproductive performance in male rainbow trout.