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A 56‐day feeding trail was conducted to evaluate the effects of taurine (Tau) supplementation on growth performance, amino acid profile and heat stress resistance capacity in juvenile Takifugu rubripes (initial body weight: 32.28 ± 0.20 g). Tiger puffer were distributed into five groups and each received one of the following diets: each diet was supplemented with 0 (T1), 5 (T2), 10 (T3), 20 (T4) or 50 (T5) g Tau/kg, respectively. Growth performances were significantly ameliorated with fed diet T3 (p < .05). The Tau content of muscle increased significantly as dietary Tau increased (p < .05). Compared to the control group, fish fed diets T4 and T5 showed significantly higher concentration of triglyceride and urea, respectively (p < .05), while taurine transporter (TauT) gene and IGF‐1 gene expression increased significantly in fish fed diets T3 and T4, respectively (p < .05). After acute heat stress, HSP70 gene expression levels were significantly greater in the livers and spleens of T. rubripes (p < .05) fed diet supplemented with Tau. Levels of complement C4 were highest in fish fed 10 g/kg Tau (p < .05). These data suggested that dietary supplemented with taurine indicated positive effects on growth performances, amino acid profile and resistance against heat stress for T. rubripes.

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Taurine (2-aminoethanesulfonic acid, Tau) exists naturally in animals, including mammals, birds, fish and aquatic invertebrates (Salze & Davis, 2015). Tau derives from methionine via cysteine, and man, monkeys and cats have low activity of the enzyme cysteine sulfinic acid decarboxylase that controls the transport rate of Tau (Kim et al., 2008). Therefore, Tau needs to be obtained from dietary sources (Schuller-Levis & Park, 2003). Physiological functions of animals are affected by Tau. Previous studies have shown that animal growth performance is positively affected by dietary Tau levels (Li et al., 2009), for example, in piglets (Liu et al., 2014), larval turbot Scophthalmus maximus (Qi et al., 2012), sea bass Dicentrarchus labrax