Supplementation Effect of Dietary Carvacrol and Thymol Polyphenols from Oregano Origanum vulgare on Growth Performance and Health Condition of Pacific White Shrimp Litopenaeus vannamei

Two growth trials were conducted for 60-days using aquaria tanks (growth trial 1) and 50-days commercial culture tank 2) to assess the potential effect on phytogenic feed additives (Regavit AquaTM, Ecopharm Hellas, Greece) containing thymol carvacrol extracted from Oregano plant Origanum Vulgare (OP) by incorporating OP powder into diet formulation 1 top-dressing process of liquid 2. The antimicrobial properties polyphenols also determined minimum inhibitory concentration (MIC) analysis against Vibrio harveyi parahaemolyticus. From (trial 1), performance, including final average body weight (ABW), percentage gain (PWG) thermal coefficient (TGC) group shrimp fed with compared control treatment. Using 2), top coating enhance performances treated From, 1, there was clear evidence elevated hemocyte activity increased lysozyme in diets supplemented treatments. MIC performed present study revealed ability inhibit bacteria at 2 × 101 µg mL-1. results indicate that inclusion up 0.6% both direct within or significantly increases non-specific immune white shrimps L. vannamei.