A 16-wk growth trial was conducted to examine the effects of dietary replacement of fish meal by defatted soybean meal (SBM) and fermented soybean meal (FSBM) with taurine supplementation on growth performance, nutrient apparent digestibility coefficient (ADC) and biological parameters of pompano fish. The FSBM was produced by fermenting SBM with Lactobacillus spp. Seven isonitrogenous and isoenergetic diets were formulated to replace 35% or 50% of fish meal by SBM or FSBM with taurine supplementation. The diets are denoted as follows: FM, SBM35, SBM35T, FSBM35T, SBM50, SBM50T, and FSBM50T. The FM (the basal diet) contained fish meal as a main source of dietary protein. Taurine was supplemented to SBM35T, FSBM35T, SBM50T, and FSBM50T at the level of 15 g/kg diet. Pompano juveniles with an initial body weight (BW) of 80 g reared in floating net cages were fed the experimental diets twice daily for 16 wk. Results showed that the final BW, weight gain, and feed conversion ratio of fish fed SBM35 and SBM50 were significantly lower than those of fish fed FM (P < 0.05), indicating that the replacement of fish meal by SBM at the rate of 35% in the diet is excessive for pompano. Supplementation of taurine to the SBM-included diets significantly increased growth performance and feed utilization (P < 0.05); however, these diets did not restore the performance back to a level equivalent to that of fish offered the basal diet. Meanwhile, fish fed FSBM35T had comparable growth and feed performances to those fed FM. Hematocrit values, total biliary bile acid levels, whole body lipid contents, and tissue taurine concentrations of fish fed SBM35 and SBM50 were the lowest among the treatments, but these parameters were improved by taurine supplementation and FSBM inclusion in the diet. Taurine supplementation increased lipid ADC, and SBM fermentation slightly enhanced both lipid and protein ADCs of the fish. These findings suggest that the combination of FSBM and taurine supplementation is an effective way to improve growth performance, nutrient digestibility, and biological parameters, and that FSBM with taurine supplementation can replace 35% of fish meal in pompano diets without any negative effects on growth and feed performances in a long-term feeding period.

中文翻译：

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脱脂发酵豆粕替代鱼粉补充牛磺酸对鲳鱼的长期饲养对生长性能、营养物质消化率和生物学参数的影响


进行了 16 周的生长试验，以检验用脱脂豆粕 (SBM) 和发酵豆粕 (FSBM) 替代鱼粉并补充牛磺酸对生长性能、营养物表观消化系数 (ADC) 和生物学参数的影响。鲳鱼。 FSBM 是通过用乳酸菌发酵 SBM 来生产的。配制了七种等氮和等能量日粮，用补充牛磺酸的 SBM 或 FSBM 替代 35% 或 50% 的鱼粉。饮食表示如下：FM、SBM35、SBM35T、FSBM35T、SBM50、SBM50T 和 FSBM50T。 FM（基础饮食）含有鱼粉作为膳食蛋白质的主要来源。在SBM35T、FSBM35T、SBM50T和FSBM50T中以15g/kg日粮水平补充牛磺酸。在漂浮网笼中饲养的初始体重（BW）为 80 克的鲳鲳幼鱼每天喂食实验饲料两次，持续 16 周。结果表明，饲喂SBM35和SBM50的鱼的最终体重、增重和饲料转化率均显着低于饲喂F​​M的鱼（ P < 0.05），表明SBM替代鱼粉的比例为35饮食中的%对于鲳鱼来说是过量的。在含 SBM 的日粮中添加牛磺酸可显着提高生长性能和饲料利用率 ( P < 0.05)；然而，这些饮食并没有将性能恢复到与提供基础饮食的鱼相当的水平。同时，饲喂 FSBM35T 的鱼与饲喂 FM 的鱼具有相似的生长和饲料性能。 饲喂 SBM35 和 SBM50 的鱼的血细胞比容值、总胆汁酸水平、全身脂质含量和组织牛磺酸浓度在处理中最低，但通过在日粮中添加牛磺酸和添加 FSBM 可以改善这些参数。牛磺酸的补充增加了鱼的脂质ADC，SBM发酵略微提高了鱼的脂质和蛋白质ADC。这些研究结果表明，FSBM和牛磺酸补充剂的结合是改善生长性能、营养物质消化率和生物学参数的有效方法，并且添加牛磺酸的FSBM可以替代鲳鱼日粮中35%的鱼粉，而不会对生长和生长产生任何负面影响。长期饲养期间的饲料性能。