Evaluation of a novel bacterial biomass as a substitution for soybean meal in plant‐based practical diets for Pacific white shrimp Litopenaeus vannamei

摘要: Three growth trials and a digestibility trial were designed to evaluate the efficacy of novel bacterial biomass (BB) in commercial-type feed formulation for Pacific white shrimp, Litopenaeus vannamei. In 1, basal diet was supplemented with 0, 60 120 g/kg BB replace soybean meal (SBM). Significant improvement observed survival when incorporated diets. However, shrimp fed diets containing exhibited significantly lower weight gain (WG) higher conversion ratio (FCR). To confirm results from 1 explore effects supplementation at low levels, 10, 20, 40, SBM 2. reductions WG, FCR, lipid content whole body, protein retention efficiency most amino acids detected BB. Trial 3 elucidate whether digestible is cause reduced growth. No improvements terms performance FCR treatments balanced protein. Apparent coefficients energy, acid (AA) determined using chromic oxide as an inert marker 70:30 replacement technique. The individual than those fish (FM) that given same time. Results this study indicated can be utilized up 40 g/kg without causing decrease supplementations (≥60 g/kg) result negative on response, well efficiency. At levels inclusion, improved basis; however, level there no improvement, indicating may other nutrients limiting. Based enhanced treatment further research regarding immune practical will necessary.