Effects of dietary selenium on the growth, selenium status, antioxidant activities, muscle composition and meat quality of blunt snout bream, Megalobrama amblycephala

• Published in: Aquaculture nutrition Vol. 23; no. 4; pp. 777 - 787
• Main Authors: Liu, G.‐X., Jiang, G.‐Z., Lu, K.‐L., Li, X.‐F., Zhou, M., Zhang, D.‐D., Liu, W.‐B.
• Format: Journal Article
• Language: English
• Published: Oxford Hindawi Limited 01.08.2017
• Subjects: antioxidant activities; Antioxidants; Diet; growth; Liver; Meat; Meat quality; Megalobrama amblycephala; Selenium; selenium status; Sodium
• ISSN: 1353-5773; 1365-2095
• DOI: 10.1111/anu.12444

An 8‐week feeding trial was performed to investigate effects of dietary selenium (sodium selenite, Na2SeO3; selenium nanoparticle, Nano‐Se; selenium yeast, Se‐yeast) on the growth, selenium status, antioxidant activities, muscle composition and meat quality of blunt snout bream. Na2SeO3 and Nano‐Se were supplemented at 0.2 mg Se kg−1, and Se‐yeast was supplemented at 0.1, 0.2, 0.4 and 0.8 mg Se kg−1 in basal diet; no Se was added as a control. The results indicated that groups of 0.2 and 0.4 mg kg−1 Se‐yeast had significantly higher weight gain and Nano‐Se, 0.2, 0.4 mg kg−1 Se‐yeast had significantly lower feed conversation ratio compared with the control group. The Se concentrations of whole body, muscle and liver linearly increased with increasing dietary Se‐yeast levels. Group of 0.4 mg kg−1 Se‐yeast significantly increased activities of catalase and glutathione peroxidase. Muscle colour of Nano‐Se, 0.2, 0.4 mg kg−1 Se‐yeast groups, the water‐holding capacity of 0.4, 0.8 mg kg−1 Se‐yeast groups showed significant differences compared with the control group. The results suggest that Se‐yeast and Nano‐Se had a better growth performance than Na2SeO3 at 0.2 mg Se kg−1, and supplementing appropriate Se‐yeast in diet can increase antioxidant activities and enhance meat quality of blunt snout bream.