Ideal profile of dietary essential amino acids for pacu (Piaractus mesopotamicus) juveniles by deletion method

Diets with balanced essential amino acid (EAA) proportions improve the feed utilization and reduce the high nitrogen excretion by the animal, minimizing the environmental impacts on the production and increase the profitability of the aquaculture production systems. The deletion method allows the establishment of an ideal relationship among the EAA in a single experiment by using the same diet, environment and fish lot, resulting in a greater uniformity and data consistency. In addition to determining the ideal profile of essential amino acids for pacu, this study may help to consolidate and further improve the deletion method using different aquatic species.必需氨基酸（EAA）配比均衡的饲料可提升动物的饲料利用率，降低其高氮排泄量，从而最小化水产养殖生产过程中的环境影响，并提升水产养殖系统的盈利能力。氨基酸缺失法可通过使用相同的饲料、养殖环境与同一批次试验鱼，在单次实验中确定EAA间的理想配比关系，进而获得更强的试验均一性与数据一致性。本研究除明确短盖巨脂鲤（pacu）的必需氨基酸理想配比模式外，还有助于巩固并进一步优化针对不同水产物种的氨基酸缺失法。