Abstract This study was carried out to evaluate the impacts and interactions of guanidinoacetic acid (GAA) and betaine (BT) supplementation of soybean-meal-based diets on the growth, meat quality, and methionine utilization in the bullfrog Lithobates catesbeianus. A basal diet was supplemented with 0 or 4 g/kg of BT and/or 0, 0.4, or 4 g/kg GAA to formulate six experimental diets, designated Control (BT/GAA: 0/0), B0G0.4 (0/0.4), B0G4 (0/4), B4G0 (4/0), B4G0.4 (4/0.4) and B4G4 (4/4). Each diet was fed to three individual bullfrogs (initially weighing 51.70 ± 0.33 g) for 8 weeks. As a result, bullfrogs fed diets with GAA showed greater weight gain than the control group (P 0.05). The findings of this study suggest that dietary GAA supplementation improves bullfrog growth performance and muscle energy metabolism after slaughter, but GAA combined BT supplementation does not improve methionine utilization for bullfrog.

中文翻译：

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在豆粕型日粮中添加胍基乙酸和甜菜碱对牛蛙 Lithobates catesbeianus 生长性能、肌肉能量代谢和蛋氨酸利用的影响

摘要 本研究旨在评估以豆粕为基础的日粮中添加胍基乙酸 (GAA) 和甜菜碱 (BT) 对牛蛙 Lithobates catesbeianus 的生长、肉质和蛋氨酸利用的影响和相互作用。基础日粮添加 0 或 4 g/kg BT 和/或 0、0.4 或 4 g/kg GAA 以配制六种实验日粮，指定为对照 (BT/GAA: 0/0)、B0G0.4 (0 /0.4)、B0G4 (0/4)、B4G0 (4/0)、B4G0.4 (4/0.4) 和 B4G4 (4/4)。将每种饮食喂给三只单独的牛蛙（最初重 51.70 ± 0.33 克）8 周。结果，饲喂 GAA 饮食的牛蛙比对照组体重增加更多（P = 0.05）。本研究的结果表明，日粮中添加 GAA 可改善牛蛙屠宰后的生长性能和肌肉能量代谢，