Dietary supplementation of β-glucan improves growth performance, the innate immune response and stress resistance of red sea bream, Pagrus major

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• 作者：M.A.O. Dawood ; S. Koshio ; M. Ishikawa ; S. Yokoyama ; M.F. El Basuini ; M.S. Hossain ; T.H. Nhu ; A.S. Moss ; S. Dossou and H. Wei
• 刊名：Aquaculture Nutrition
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：23
• 期：1
• 页码：148-159
• 全文大小：1131K
• ISSN：1365-2095

文摘

A 56-day feeding trial was conducted to evaluate the effects of supplemented diets with β-glucan (BG) at four levels [0 (D1), 250 (D2), 500 (D3) and 1000 (D4) mg BG kg⁻¹] on red sea bream, Pagrus major. The obtained results revealed a significant increase (P < 0.05) in final body weight, weight gain, specific growth rate, feed intake, body protein content, lysozyme activity and tolerance against low-salinity stress test in all BG-supplemented groups when compared with BG-free group. Furthermore, D4 group resulted in a significant increase in feed efficiency ratio, protein gain, protein and lipid digestibilities, serum bactericidal activity and peroxidase content when compared with D1 group (P < 0.05). Haematocrit and plasma protein content in D3 group were significantly higher than those in D1 group (P < 0.05). Interestingly, BG supplementation decreased glutamic oxaloacetic transaminase (GOT) in D2 group and reactive oxygen metabolites in D2, D3 and D4 groups when compared with D1 group. Following low-salinity stress test, significantly higher amounts of secreted mucus were observed in fish fed D2 and D4 diets than those from fish fed D1 diet (P < 0.05). In conclusion, the supplementation of BG improves growth, stress resistance and immune response of P. major.