Document Type : Research Paper
Authors
1
Department of Biotechnology, Faculty of Biological Sciences, Alzahra university, Tehran, iran
2
Department of Aquatic Health and Diseases, Faculty of Veterinary Medicine, University of Tehran, Iran.
3
Department of Fisheries, Faculty of Nano and Bio Science and Technology, Persian Gulf University, Bushehr, iran
4
5- Research and Development Unit of Faradaneh Aquatic Feed Producer, Shahrekord, Iran
10.22124/japb.2024.26680.1529
Abstract
The increase in populating, the demand for aquaculture and the limitation of water resources have caused compressed breeding in the aquaculture industry, which is directly related to the spread of the disease and the use of antibiotics for treatment. Considering the side effects of antibiotics, the use of immune stimulants that increases resistance to environmental stresses and infectious diseases is very important in this industry. the present study was conducted with the aim of investigating the effect of beta-glucan on some growth and immunity parameters such as lysozyme activity, complement effect, total serum antibody and immunoglobulin M on Asian seabass. For this purpose, 25-gram fish were examined in three treatment of 15 (each with two repetitions) and during a period of 2 months. The first treatment was fed only with food pellets prepared by Faradane company (control) The second treatment was fed with food pellets and 250 microliters of injectable glucan, (Injection twice during the the breeding period) (treatment 1). And the third group was fed with food pellets with oral prebiotic containing 15% beta glucan (The final glucan concentration was calculated as 1 mg/g) (treatment 2) The use of prebiotic supplement containing beta-glucan (treatment 2) had a positive and significant effect on growth performance and immune factors of fish (P<0.05). So that inducing non-specific immune defense. Among the studied groups, treatment 2 showed the best results in terms of final weight, specific growth rate, weight gain percentage, lysosome activity, complement activity, total immunoglobulin and immunoglobulin M (P<0.05) respectively (82/43, 1/96, 224/55, 39/5, 123/8, 16/55, 4/96). As a result, the use of oral prebiotic supplement containing beta-glucan in seabass diet is recommended due to its positive effects on physiological parameters and improvement of seabass immunity.
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