Abstract Taurine serves an important role in many species, including fish. The purpose of this study was to investigate the effects of varying dietary taurine levels on the growth, antioxidant capacity, and tissue deposition of taurine in golden pompano. In addition, the mechanism of taurine synthesis was studied via enzyme activity and gene expression of the following enzymes: cystathionine β-synthase (CBS), cystathionine γ-lyase (CSE), cysteine dioxygenase (CDO), cysteine sulfinic acid decarboxylase (CSAD), and 2-aminoethanethiol dioxygenase (ADO). Taurine concentrations of 1.3, 4.4, 7.4, 10.5 and 12.7 g kg−1 were added to the basic feed, hereafter labelled the T0, T1, T2, T3 and T4 diets, respectively. A control diet was supplemented with 1.3 g kg−1 taurine. Following 8 weeks of treatment, the results showed that the specific growth rate increased with the increase in dietary taurine content; the growth rate peaked at the 10.5 g kg−1 dietary taurine level (P 0.05). The gene expression of CBS, CSE, CDO, CSAD and ADO exhibited a downward trend with an increase of taurine (P

中文翻译：

---

膳食牛磺酸摄入量影响金鲳的生长和牛磺酸合成调节，Trachinotus ovatus (Linnaeus 1758)

摘要 牛磺酸在包括鱼类在内的许多物种中发挥着重要作用。本研究的目的是研究不同膳食牛磺酸水平对金鲳鱼中牛磺酸的生长、抗氧化能力和组织沉积的影响。此外，通过酶活性和以下酶的基因表达研究了牛磺酸合成的机制：胱硫醚β-合酶（CBS）、胱硫醚γ-裂解酶（CSE）、半胱氨酸双加氧酶（CDO）、半胱氨酸亚磺酸脱羧酶（CSAD）和 2-氨基乙硫醇双加氧酶 (ADO)。将浓度为 1.3、4.4、7.4、10.5 和 12.7 g kg-1 的牛磺酸添加到基础饲料中，以下分别标记为 T0、T1、T2、T3 和 T4 日粮。对照饮食补充有 1.3 g kg-1 牛磺酸。经过8周的治疗，结果表明，比生长率随日粮牛磺酸含量的增加而增加；生长速率在 10.5 g kg−1 膳食牛磺酸水平达到峰值（P 0.05）。CBS、CSE、CDO、CSAD和ADO基因表达量随着牛磺酸的增加呈下降趋势（P