en تخصصي Special پژوهشي Research <span style="font-size:11pt"><span style="line-height:120%"><span style="font-family:Calibri,sans-serif"><span lang="EN-GB" style="font-size:12.0pt"><span style="line-height:120%"><span new="" roman="" style="font-family:" times="">Two consecutive trials were conducted to evaluate the effects of functional amino acid mix obtained from poultry keratin in white shrimp (<i>Litopenaeus vannamei</i>) diets. Three diets were formulated, a<span style="color:black"> control and two diets containing the supplementation of 0.50% (KFAA0.5%), and 1% (KFAA1%) of functional amino acids mix. For the low oxygen acute challenge, shrimp were suddenly transferred from 4.2 mg/L of dissolved oxygen into a 0.5 mg/L of dissolved oxygen (no aeration) 20 L tanks. For the low salinity acute challenge, shrimp were suddenly transferred from 15 ppt salinity into 0 ppt salinity 20 L tanks. Shrimp fed KFAA1% had significantly higher hemocyanin levels (+29.4%) and higher levels of plasmatic protein (+2.1%) through the 16 days of feeding. Differences in hemocyanin and plasma protein levels were detected mainly at 16 days of feeding. Shrimp under low oxygen acute challenge and fed KFAA1% resisted significantly longer to lose balance (+18.3%) and hemocyanin and plasma protein levels significantly decreased (-25.3% and -4.8%, respectively). Similarly, shrimp under low salinity acute challenge and fed KFAA1% resisted significantly longer to lose balance (+79.1%) and plasmatic protein significantly decreased during the stress (-4.2%). These results suggest the shrimp supplemented the functional amino acids mix had a more prepared physiological state which later, during the acute challenge, shrimp could benefit from to achieve higher water stress resistance. For challenge-oriented nutrition strategies, this study encourages discussion on understanding amino acids and their role in physiology above and beyond the traditional approaches as essential and dispensable.</span></span></span></span></span></span></span> Sustainability, Functional amino acids, Water stress resistance 121 136 http://injbir.com/browse.php?a_code=A-10-37-1&slc_lang=en&sid=1 B. Pratoomchat boonyara@buu.ac.th 1003194753284600483 1003194753284600483 No Department of Aquatic Science, Faculty of Science, Burapha University, Bangsaen, Chonburi, Thailand. B. Kersanté pkersante@bcf-lifesciences.com 1003194753284600484 1003194753284600484 Yes BCF Life Sciences, Boisel, 56140 Pleucadeuc, France R.T. Pereira rpereira@outlook.com 1003194753284600485 1003194753284600485 No Raquel Pereira Consultoria LTDA, 13087605 Campinas, Brazil G. Le Reste g.lereste@halieutica.net 1003194753284600486 1003194753284600486 No Halieutica, 49000 Angers, France