The study aimed to evaluate the effect of tributyrin on the growth performance, survival, hypoxia tolerance, and nutrient digestibility of Pacific white shrimp fed 25% and 50% soybean meal (SBM) diets. Six experimental diets were formulated: (1) 25% SBM without tributyrin; (2) 25% SBM with 0.05% tributyrin; (3) 25% SBM with 0.1% tributyrin; (4) 50% SBM without tributyrin; (5) 50% SBM with 0.05% tributyrin; and (6) 50% SBM with 0.1% tributyrin. The shrimp were fed the experimental diets daily for 10 weeks. Tributyrin supplementation at 0.1% diet significantly improved the weight gain of shrimp that fed 25% SBM but not the other groups. Nevertheless, shrimp that fed tributyrin had significant improvement in survival rate at both SBM levels. Significant reductions in Vibrio spp. counts in the hepatopancreas and intestine were also evident in all tributyrin-fed groups. In addition, 0.1% tributyrin in both SBM levels significantly enhanced the shrimp tolerance to hypoxia. Lastly, the digestibilities were generally unaffected by the tributyrin except only for the lipid digestibility of the 0.1% tributyrin in 25% SBM group, which showed a significant increase. Overall, tributyrin was proven beneficial for the shrimp's health, especially for those fed diet with a moderate level of SBM (25%).

中文翻译：

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三丁酸甘油酯对不同豆粕水平南美白对虾生长性能、存活率、耐缺氧能力和养分消化率的影响

该研究旨在评估三丁酸甘油酯对饲喂 25% 和 50% 豆粕 (SBM) 饲料的太平洋白虾生长性能、存活率、耐缺氧性和营养物质消化率的影响。配制了六种实验饲料：（1）25％SBM，不含三丁酸甘油酯；(2)25%SBM加0.05%三丁酸甘油酯；(3)25%SBM加0.1%三丁酸甘油酯；(4) 50% SBM，不含三丁酸甘油酯；(5) 50% SBM加0.05%三丁酸甘油酯；(6) 50% SBM 与 0.1% 三丁酸甘油酯。这些虾每天都喂食实验饲料，持续 10 周。在日粮中添加 0.1% 的三丁酸甘油酯可显着改善饲喂 25% SBM 的虾的体重增加，但对其他组的虾没有影响。然而，喂食三丁酸甘油酯的虾在两个 SBM 水平上的存活率都有显着提高。弧菌属显着减少。在所有三丁酸甘油酯喂养组中，肝胰腺和肠道中的计数也很明显。此外，两种SBM水平中0.1%三丁酸甘油酯均显着增强了虾对缺氧的耐受性。最后，除了25％SBM组中0.1％三丁酸甘油酯的脂质消化率显着增加外，消化率总体上不受三丁酸甘油酯的影响。总体而言，三丁酸甘油酯被证明对虾的健康有益，特别是对于那些以中等水平的 SBM (25%) 喂养的虾。