Fermented rice bran (FRB) was evaluated as an alternative protein source to soybean meal (SM) in practical diets for juvenile black tiger shrimp, Penaeus monodon. This feed ingredient was tested in a feeding trial to replace soybean meal in P. monodon diets at 0% (T0), 12.5% (T12.5), 25% (T25), 37.5% (T37.5), and 50% (T50). Five iso-nitrogenous and iso-caloric experimental diets containing 44% crude protein were fed to groups of juvenile shrimp (0.47 ± 0.002 g) randomly assigned to twenty 60-l rectangular tanks equipped with a recirculating seawater system. Each dietary treatment was run in 4 replicates, and the feeding trial lasted 50 days. Results show significant improvement in weight gain, specific growth rate, and protein efficiency ratio in treatment T12.5 and T25. Treatments with higher levels of SM replacement with FRB exhibited similar growth indices to those of the control group. Polynomial regression analysis indicates that the optimum replacement of soybean meal with FRB for optimum growth is 21.08%. The apparent dry matter and protein digestibility coefficients of FRB are 83.05 ± 0.02% and 87.20 ± 0.30%, respectively. There were no significant differences in the whole-body composition (dry matter, protein, lipid, ash) among treatments of shrimp fed with FRB replacement. The data suggest that FRB replacement of dietary soybean meal is feasible at 50% without affecting the growth performance but may promote growth at 21.08% replacement of P. monodon.

中文翻译：

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固态发酵将米糠转化为斑节对虾的高蛋白饲料成分


在黑虎虾幼年斑节对虾的实际饲料中，发酵米糠（FRB）被评估为豆粕（SM）的替代蛋白质来源。该饲料成分在饲喂试验中进行了测试，以替代斑节对虾日粮中的豆粕，浓度为 0% (T0)、12.5% (T12.5)、25% (T25)、37.5% (T37.5) 和 50% （T50）。将含有 44% 粗蛋白的五种等氮和等热量实验饲料喂给幼虾组（0.47 ± 0.002 g），这些幼虾被随机分配到 20 个配备有循环海水系统的 60 升矩形水箱中。每个饮食处理进行 4 次重复，喂养试验持续 50 天。结果显示处理 T12.5 和 T25 的增重、特定生长率和蛋白质效率显着改善。用 FRB 替代 SM 的水平较高的处理表现出与对照组相似的生长指数。多项式回归分析表明，FRB替代豆粕的最佳生长率为21.08%。 FRB的表观干物质和蛋白质消化率系数分别为83.05±0.02%和87.20±0.30%。饲喂 FRB 替代品的虾的全身成分（干物质、蛋白质、脂质、灰分）没有显着差异。数据表明，FRB 替代日粮豆粕 50% 是可行的，不会影响生长性能，但替代斑节对虾 21.08% 可能会促进生长。