Abstract Protein restriction is a less-studied nutritional strategy in aquaculture species. The present study was designed to investigate the effects of protein restriction for different durations on the growth performance, body composition, the profile of fatty acids and amino acids, and the immune response of rainbow trout for eight weeks. For this purpose, 225 juveniles (27.74 ± 0.43) were distributed in five experimental treatments include P45 (control: feeding a diet with 450 g/kg protein for eight weeks); P35 (feeding a diet with 350 g/kg protein for eight weeks); P35-P45 (every other day feeding a diet with 450 and 350 g/kg protein); WP35-P45 (every other week feeding a diet with 450 and 350 g/kg protein); and 3WP35 (feeding a diet with 350 g/kg protein for three weeks and then, a diet with 450 g/kg protein for five weeks). Rainbow trout fed dietary P35 had a lower value of weight gain (94.73 g) and specific growth rate (2.53) when compared to the other groups (P

中文翻译：

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限制性蛋白质饲喂策略降低了蛋白质消耗，而不会影响虹鳟鱼 (Oncorhynchus mykiss) 的生长性能、肉质和非特异性免疫参数

摘要 蛋白质限制是水产养殖物种中研究较少的营养策略。本研究旨在调查不同时间限制蛋白质对虹鳟鱼生长性能、身体成分、脂肪酸和氨基酸的分布以及八周的免疫反应的影响。为此，将 225 只幼鱼 (27.74 ± 0.43) 分配到五个实验处理中，包括 P45（对照：用 450 g/kg 蛋白质喂养 8 周）；P35（喂食含 350 g/kg 蛋白质的饮食八周）；P35-P45（每隔一天喂食 450 和 350 g/kg 蛋白质的饮食）；WP35-P45（每隔一周喂食 450 和 350 g/kg 蛋白质的饮食）；和 3WP35（喂食 350 g/kg 蛋白质的饮食三周，然后喂食 450 g/kg 蛋白质的饮食五周）。