Effects of different levels of diet nano selenium (Nano-Se) on growth and gonad quality indices and seminal plasma antioxidants in male goldfish (Carassius auratus gibelio)

Document Type : Research Paper


1 M.Sc. in Fisheries, Department of Aquaculture, Marine Sciences Faculty, Tarbiat Modares University, Noor, Iran

2 Professor in Department of Aquaculture, Marine Sciences Faculty, Tarbiat Modares University, Noor, Iran


Successful reproduction is one of the most important issues in aquaculture. In this regard, gamete quality is a limiting factor. Selenium, improves the reproduction and immunity in all animals. In the present study, the effects of diets containing different level of Nano-Se on growth indices, gonad histology and activity of two seminal plasma antioxidants, malondialdehyde (MDA) and glutathione peroxidase (GPx), were assessed. Male goldfish (67/28±0/74g, n=200) were fed with 0 (control), 0.1, 0.5 and 1 mg of Nano-Se per Kg of a commercial food for 8 weeks. The developmental stages of the gonadal were evaluated using a common histological method. HCG hormone injection was done to artificially obtain the sperm. The higher Nano-Se concentrations increased and decreased the growth and FCR, respectively. The activity of GPx and MDA in seminal plasma increased in the fishes fed the diets containing Nano-Se, and also the histological observations of the gonads illustrated an increase in spermatozoa count. Hence, 0.5 and 1 mg/Kg Nano-Se improve the growth and gonad indices, and increase the activity of the antioxidant seminal plasma enzymes in goldfish.


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