The use of novel aquaculture species depends on the determination of their nutritional requirements. This study aims at determining dietary protein, energy, and protein–energy ratio requirements of juvenile striped surubim, Pseudoplatystoma reticulatum, an economically important carnivorous South American catfish for capture fisheries and highly regarded for fish farming purposes. Juvenile striped surubim (53.6 ± 1.30 g, n = 525) were randomly stocked (n = 7) in 75 test cages (210 L) and hand fed for 60 days, two daily meals, with 25 diets formulated to contain five levels of digestible protein (DP) (320, 360, 400, 440, and 480 g/kg) and five levels of digestible energy (DE) (15.1, 15.6, 16.1, 16.6, and 17.2 MJ/kg) in a completely randomized design, 5 × 5 factorial scheme (n = 3). Dietary energy and protein level affected performance, feed efficiency, and metabolism while the whole‐body composition was not affected by diets. Estimated dietary requirements for the best performance and best nutrient retention were 15.1 MJ/kg DE and 390 g/kg DP, therefore a 25.9 g/MJ of DP:DE ratio.

中文翻译：

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网纹假单胞菌的消化能，蛋白质和能量-蛋白质比例要求

新型水产养殖品种的使用取决于其营养需求的确定。这项研究的目的是确定幼年条带状surubim，Pseudoplatystoma reticulatum（一种经济上重要的食肉南美South鱼，用于捕捞渔业，并被高度视为鱼类养殖目的）的饮食蛋白质，能量和蛋白质-能量比需求。少年条纹苏鲁宾（53.6±1.30克，Ñ = 525）随机放养（Ñ= 7）在75个试验笼（210 L）中，手工喂养60天，每天两餐，其中25种日粮含有五种可消化蛋白质（DP）（320、360、400、440和480 g / kg） ）和5级可消化能量（DE）（15.1、15.6、16.1、16.6和17.2 MJ / kg）在完全随机设计，5×5阶乘方案中（n = 3）。饮食能量和蛋白质水平会影响生产性能，饲料效率和新陈代谢，而整体组成不会受到饮食的影响。最佳性能和最佳养分保留的估计饮食需求为15.1 MJ / kg DE和390 g / kg DP，因此DP：DE比为25.9 g / MJ。