This study was conducted to test the effect of taurine on growth performance, muscle composition, digestive enzyme activities, amino acid profiles and blood biochemistry of beluga (209.1 ± 23 g) in both fresh water (FW) and brackish water (BW: 15 ppt). Twelve experimental treatments with six taurine levels, for FW (Tau2.1, Tau4.3, Tau7.1, Tau12.3, Tau16.7 and Tau21.8) and BW (BwTau2.1, BwTau4.3, BwTau7.1, BwTau12.3, BwTau16.7 and BwTau21.8) were designed to feed and farm fish for 8 weeks. Generally, fish farmed in BW had better performance regarding growth. Regarding amino acid profile, fish-fed moderate dosages of taurine (7.1 and 12.3 g/kg) had higher and lower taurine and serine in muscle, respectively. Beluga-fed diets with 12.3- and 16.7-g/kg taurine in FW and BW had the highest growth rate in line with the highest amylase and protease activities, alanine transaminase and aspartate transaminase; and lowest lactate dehydrogenase, triglyceride and cholesterol. The lipid-lowering effect of taurine was observed. In conclusion, supplementation of beluga diets with 12.3- to 16.7-g/kg taurine for farming in both FW and BW is required.

中文翻译：

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我们应该在淡水还是微咸水中养殖白鲸（Huso huso）？——牛磺酸需求案例研究

本研究旨在测试牛磺酸对淡水 (FW) 和微咸水 (BW: 15 ppt) 中白鲸 (209.1 ± 23 g) 的生长性能、肌肉成分、消化酶活性、氨基酸谱和血液生化的影响）。FW（Tau2.1、Tau4.3、Tau7.1、Tau12.3、Tau16.7 和 Tau21.8）和 BW（BwTau2.1、BwTau4.3、BwTau7.1、 BwTau12.3、BwTau16.7 和 BwTau21.8) 设计用于喂养和养殖鱼类 8 周。一般来说，BW养殖的鱼在生长方面表现更好。关于氨基酸谱，喂食中等剂量牛磺酸（7.1 和 12.3 g/kg）的鱼在肌肉中的牛磺酸和丝氨酸分别较高和较低。白鲸饲喂 12.3 和 16 的饮食。FW和BW中7-g/kg牛磺酸的生长速率最高，与最高的淀粉酶和蛋白酶活性、丙氨酸转氨酶和天冬氨酸转氨酶一致；和最低的乳酸脱氢酶、甘油三酯和胆固醇。观察到牛磺酸的降脂作用。总之，需要在白鲸日粮中添加 12.3 至 16.7-g/kg 牛磺酸，以用于半白和半白的养殖。