With their low molecular weight and high level of assimilation, mixes of free amino acids (MFAA) obtained from the extensive hydrolysis of poultry keratin are potential interesting candidates for aquaculture feeds. Two trials, I and II, were conducted to evaluate the effects of MFAA on whiteleg shrimp Litopenaeus vannamei post larvae (PL). Both trials included a growth phase and experimental challenges. In these two trials, PL were fed four diets (control; control+1% MFAA; control+5% MFAA; control+10% MFAA) respectively for 28 days (trial I) and 21 days (trial II) for growth phases. Following this growth phases, animals were either experimentally infected with white spot syndrome virus (WSSV group) or Vibrio parahaemolyticus, with a toxin gene-bearing plasmid responsible for acute hepatopancreatic necrosis disease (AHPND group), or mock infected (non-infected control) considering four diets treatments (control; control+1% MFAA; control+5% MFAA; control+10% MFAA) during 28 days for trials I and II. In these two trials, survival and biomass reached higher rates in WSSV infection groups, for PL fed with MFAA. For AHPND infection group in trial II, survival and biomass were also higher for PL fed with MFAA. Those results show the potential of MFAA to enhance shrimp PL performance and their application as shrimp feeding ingredients with functional benefits on animal survival in case of immune challenge.

由于其低分子量和高同化水平，从家禽角蛋白的广泛水解中获得的游离氨基酸（MFAA）的混合物是水产养殖饲料的潜在有趣候选物。进行了两项试验I和II，以评估MFAA对白腿虾南美白对虾幼虫（PL）的影响。两项试验均包括生长阶段和实验挑战。在这两个试验中，PL分别在生长阶段分别喂食了28天（试验I）和21天（试验II）四种饮食（对照组；对照组+ 1％MFAA；对照组+ 5％MFAA；对照组+ 10％MFAA）。在此生长阶段之后，对动物进行实验性感染白斑综合症病毒（WSSV组）或副溶血性弧菌，带有负责急性肝胰腺坏死疾病（AHPND组）或模拟感染（未感染的对照组）的携带毒素基因的质粒，考虑四种饮食疗法（对照组；对照组+ 1％MFAA；对照组+ 5％MFAA；对照组+10 I和II的28天之内（％MFAA）。在这两个试验中，对于以MFAA喂养的PL，WSSV感染组的存活率和生物量达到更高的比率。对于试验II中的AHPND感染组，饲喂MFAA的PL的存活率和生物量也更高。这些结果表明，MFAA可以增强虾的PL性能，并将其用作虾饲料成分，在免疫挑战的情况下具有对动物存活的功能性益处。