Affiliation:
1. Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang 222005, China
2. Nanchang Key Laboratory of Special Aquatic and Rural Affairs Breeding and Healthy Aquaculture, Jiangxi Fisheries Research Institute, Nanchang 330039, China
3. Jiujiang Xingxiang Aquaculture Co., Ltd., Jiujiang 332200, China
4. College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang 330045, China
Abstract
Selenium, an essential trace element, exerts beneficial effects on aquatic animals when present in suitable concentrations. This study investigates the effect of dietary nanometer selenium (Nano-Se) on the muscle selenium accumulation, nutrient composition, and antioxidant ability of Paramisgurnus dabryanus spp. Nano-Se was supplemented in the basal diets at levels of 0, 0.1, 0.2, 0.4, and 0.6 mg/kg. Three hundred fish, averaging 5.21 ± 0.06 g, were randomly divided into five groups and fed the experimental diet for 6 weeks. Fish with a dietary Nano-Se supplement of 0.2 mg/kg exhibited activities of SOD, GSH-Px, AKP, and CAT in the liver, which were significantly higher (p < 0.05) compared to the control diet, while MDA content was significantly lower (p < 0.05) in the 0.2 mg/kg group. The muscle selenium content significantly increased (p < 0.05) at ≥0.2 mg/kg Nano-Se levels. The highest levels of essential amino acids, EAA/TAA, and EAA/NEAA ratios were observed in fish fed 0.2 mg of Nano-Se. Thus, this study recommends incorporating 0.2 mg of Nano-Se per kg in the diet to enhance antioxidant defense, selenium content, and nutrient composition.
Funder
Leading Talent Project of the Training Plan for Academic and Technical Leaders of Major Disciplines in Jiangxi Province
Integrated Breeding of Loach and its Industrial Promotion and Application
Special Fund Project for the Transformation of Scientific and Technological Achievements of Lianyungang Municipality
Introduction of the talent research start-up fund of Jiangsu Ocean University