Functional amino acids supplementation for shrimp increases water stress resistance under low oxygen and low salinity acute challenges

Two consecutive trials were conducted to evaluate the effects of functional amino acid mix obtained from poultry keratin in white shrimp (Litopenaeus vannamei) diets. Three diets were formulated, a control and two diets containing the supplementation of ۰.۵۰% (KFAA۰.۵%), and ۱% (KFAA۱%) of functional amino acids mix. For the low oxygen acute challenge, shrimp were suddenly transferred from ۴.۲ mg/L of dissolved oxygen into a ۰.۵ mg/L of dissolved oxygen (no aeration) ۲۰ L tanks. For the low salinity acute challenge, shrimp were suddenly transferred from ۱۵ ppt salinity into ۰ ppt salinity ۲۰ L tanks. Shrimp fed KFAA۱% had significantly higher hemocyanin levels (+۲۹.۴%) and higher levels of plasmatic protein (+۲.۱%) through the ۱۶ days of feeding. Differences in hemocyanin and plasma protein levels were detected mainly at ۱۶ days of feeding. Shrimp under low oxygen acute challenge and fed KFAA۱% resisted significantly longer to lose balance (+۱۸.۳%) and hemocyanin and plasma protein levels significantly decreased (-۲۵.۳% and -۴.۸%, respectively). Similarly, shrimp under low salinity acute challenge and fed KFAA۱% resisted significantly longer to lose balance (+۷۹.۱%) and plasmatic protein significantly decreased during the stress (-۴.۲%). 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.

کلیدواژه ها:

Sustainability ، Functional amino acids ، Water stress resistance