Effect of Different Water Flow Speeds on Serum Biochemical Indicators and Muscle Quality of Juvenile Hybrid Sturgeon
DU Qiang1, ZHAO Fei1, WANG Yanyan1, ZHAO Zhenxin1, LUO Tianxun1, LI Xiaoyi1, ZENG Shiyu1, CHEN Weirong2, ZHAO Zeying2, FENG Wei2
1. Guizhou Aquatic Research Institute/Guizhou Special Aquatic Engineering and Technology Centre, Guiyang 550025, China; 2. Guizhou Agricultural Science and Technology Information Institute, Guiyang 550025, China
Abstract：In order to investigate the effects of flow speed on the nutritional composition and blood biochemical parameters of juvenile hybrid sturgeon, the hybrid sturgeon juveniles (Siberian sturgeon Acipenser baerii♀×Amur sturgeon A. schrenckii[QX(Y10]♂[QX)]) with initial body weight of (10.82±0.56) g were randomly divided into four groups and reared in 1-m-diameter fiberglass tanks at water flow speeds of 1 BL (body length)/s (control), 2 BL/s, 3 BL/s, and 4 BL/s controlled by adjusting the number and direction of water spray outlets on the pipes at water temperatures of 22—24 ℃. After 40 days of rearing, the muscle nutritional composition and blood biochemical parameters were determined. The results showed that there was a tendency to increase first and then decrease in weight gain rate with increasing flow speed, with the maximal weight gain rate in the 3 BL/s group (P＜0.05), and the optimal flow speed of 2.61 BL/s by quadratic regression analysis. The peak contents of crude fat (CF), total amino acids (TAA), essential amino acids (EAA), flavor amino acids (FAA) and total fatty acids (TFA) in the muscle were observed in the 2 BL/s or 3 BL/s groups, with significant increase in contents of unsaturated fatty acids including docosahexaenoic acid (DHA) and arachidonic acid (ARA) compared with the control (P＜0.05). There were significant changes in the activity of gamma-glutamyl transferase (GGT) and creatine kinase (CK) and in blood urea nitrogen (BUN) concentration, with peak values of GGT and CK in the 3 BL/s group. The flow speeds of 2 BL/s and 3 BL/s can lead to significantly promote the growth of juvenile hybrid sturgeon and result in improving muscle nutritional quality and fish health.
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2026, Vol. 45 
