TY - JOUR AU - Phan, Tu Thi Cam AU - Vu, Ut Ngoc AU - Pham, Ngan Thi Tuyet AU - Vu, Hai Hung AU - Huynh, Giang Truong PY - 2022/06/25 Y2 - 2024/03/29 TI - Evaluation of Pseudomonas stutzeri AM1 and Pseudomonas oleovorans ST1.1 isolated from shrimp pond sediments as probiotics for whiteleg shrimp, Litopenaeus vannamei culture JF - International Journal of Aquatic Biology JA - Intl. J. Aquat. Biol. VL - 10 IS - 3 SE - Articles DO - 10.22034/ijab.v10i3.1580 UR - https://ij-aquaticbiology.com/index.php/ijab/article/view/1580 SP - 201-208 AB - <p>This study aimed to isolate the probiotic potential of <em>nitrifying bacterial strains </em>and to evaluate their effects on water quality and growth performance of the whiteleg shrimp, <em>Litopenaeus vannamei</em>. Based on an initial screening of 100 isolates identified from sediment samples, 12 strains could remove nitrogen compounds and two strains (<em>Pseudomonas stutzeri</em> AM1 and <em>P. oleovorans</em> ST1.1) showed highly efficient nitrogen removal ability. Within 96 h, total ammonia nitrogen (TAN) removal efficiency in the two strains was 28.0-31.6% and 21.5-24.9%, respectively. The water addition of 10<sup>3 </sup>CFUmL<sup>-1</sup> of <em>P. stutzeri</em> AM1 (T1) and <em>P. oleovorans</em> ST1.1 (T2) effectively reduced TAN, nitrite, nitrate, and total sulfide and increased the survival rate and biomass of shrimp. However, no significant differences were found between the control (T0) and treatment groups (T1 and T2) in the final weight, weight gain and specific growth rate of shrimp. Overall, <em>P. stutzeri</em> AM1 (T1) and <em>P. oleovorans</em> ST1.1 used as water supplements improved water quality and the survival rate of whiteleg shrimp.</p> ER -