Effects of the Short-term Temporary Rearing of Micropterus salmoides on Gallic Acid on its Oxidative Stress Level, Muscle Quality, and Storage Quality

To explore an efficient and low-cost temporary rearing method from the perspective of the quality assurance of raw materials, we investigated the effects of the temporary rearing of Micropterus salmoides on gallic acid on its oxidative stress level, muscle quality, and storage quality at 4 ℃. The results showed that after the temporary rearing of this fish species with 5 mg/L gallic acid for 7 days, the serum superoxide dismutase (SOD), muscle SOD, and catalase activities were reduced and the protein content of the muscle was increased along with its color, hardness, and water-holding capacity. When stored at 4 ℃, deterioration of the muscle texture slowed down. The water-holding capacity increased. The pH, whiteness, and malondialdehyde content decreased, and the activity of cathepsin B+L was inhibited. Therefore, short-term temporary rearing on 5 mg/L gallic acid for 7 days reduced oxidative stress in Micropterus salmoides and prolonged its freshness at 4 ℃ by inhibiting protein degradation and lipid oxidation.