Effects of Dietary Sodium Acetate on Growth Performance, Fillet Quality, Plasma Biochemistry, and Immune Function of Juvenile Golden Pompano (Trachinotus ovatus)

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Abstract
Six isonitrongenous and isolipidic diets were formulated to feed 360 fish (mean initial body weight: g) with graded levels of sodium acetate (SA1 (0), SA2 (250 mg/kg), SA3 (500 mg/kg), SA4 (1000 mg/kg), SA5 (2000 mg/kg), and SA6 (4000 mg/kg)) for 8 weeks. The results revealed that weight gain rate, specific growth rate, and feed intake of golden pompano were significantly increased in SA3 and SA4 treatments ( ). Dietary SA level significantly improved lipid contents and gumminess of muscle ( ). Supplement levels of dietary SA significantly influenced plasma biochemical parameters containing triglyceride, glucose, high-density lipoprotein cholesterol, complements, and immunoglobulin M ( ). Appropriate supplement levels of dietary SA significantly increased enzyme activities of hepatic superoxide dismutase and total antioxidant capacity and decreased malondialdehyde contents ( ). Furthermore, appropriate SA levels downregulated the expression levels of Keap1, IL-8, TNF-α, and NF-κB genes and upregulated the expression levels of Nrf2 and TGF-β genes of the spleen ( ). Excess SA caused negative effects for Trachinotus ovatus. The optimum supplement level of SA for juvenile golden pompano was evaluated to be 1423.67 mg/kg based on WGR.
Funding Information
  • Special Funds for Science Technology Innovation and Industrial Development of Shenzhen Dapeng New District (PT202101-26, 2019KJ143, JCYJ20180306180203889, 2021XK02, 2020TD55)
  • Guangdong Provincial Special Fund for Modern Agriculture Industry Technology Innovation Teams (PT202101-26, 2019KJ143, JCYJ20180306180203889, 2021XK02, 2020TD55)
  • Shenzhen Grant Plan for Science and Technology (PT202101-26, 2019KJ143, JCYJ20180306180203889, 2021XK02, 2020TD55)
  • CAFS (PT202101-26, 2019KJ143, JCYJ20180306180203889, 2021XK02, 2020TD55)

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