Protein hydrolysates from poultry by-product (CPH) and poultry by-product plus swine liver (PHPPL) were evaluated for digestibility and attractiveness for Litopenaeus vannamei, their effect on growth as a substitute for salmon by-product meal. Initially, the apparent digestibility coefficient (ADC) of the protein hydrolysates was determined and their attractiveness was also evaluated. Subsequently, five diets with 0, 25, 50, 75 and 100 % substitution of the salmon by-product meal protein by PHPPL, were evaluated. The experiment was conducted for 42 days in a clear water system. For the digestibility assay, the protein hydrolysates had high ADC for protein, dry matter, energy, and essential amino acids for L. vannamei. However, PHPPL had better digestibility results than CPH, so it was used in the growth assay. No difference in the attractiveness of the tested ingredients was observed (p ≥ 0.05). In the growth assay, survival was no different (p ≥ 0.05) among shrimp fed the different protein replacement levels. However, we observed an increase in shrimp growth with the treatment of 25 % protein replacement. Diet with 50 % protein replacement promoted growth similar to that of the control diet with a subsequent decline of up to 100 % of protein replacement. Therefore, it can be concluded that up to 25 % of dietary protein replacement with PHPPL can improve shrimp growth.

评价了家禽副产品（CPH）和家禽副产品加猪肝（PHPPL）的蛋白水解物对凡纳滨对虾的消化率和吸引力，它们对鲑鱼副食粉替代品对生长的影响。最初，确定蛋白质水解物的表观消化率（ADC），并评估其吸引力。随后，评估了用PHPPL对鲑鱼副产物粕蛋白进行0、25、50、75和100％替代的五种日粮。该实验在清水系统中进行了42天。对于消化率测定，蛋白质水解产物具有较高的ADC，可用于南美白对虾的蛋白质，干物质，能量和必需氨基酸。但是，PHPPL比CPH具有更好的消化率结果，因此可用于生长分析。没有观察到被测成分的吸引力有差异（p≥0.05）。在生长试验中，饲喂不同蛋白质替代水平的虾的存活率没有差异（p≥0.05）。然而，我们观察到使用25％的蛋白质替代品可以增加虾的生长。补充蛋白质含量为50％的日粮促进生长的速度与对照饮食相似，随后下降的蛋白质替代量最高为100％。因此，可以得出结论，用PHPPL替代多达25％的饮食蛋白质可以改善虾的生长。