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首页> 外文期刊>Aquaculture International >Multienzymatic capacity of cultivable intestinal bacteria from captive Litopenaeus vannamei (Boone, 1931) shrimp reared in green water
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Multienzymatic capacity of cultivable intestinal bacteria from captive Litopenaeus vannamei (Boone, 1931) shrimp reared in green water

机译：来自植物肠道肠杆菌（Boone，1931）虾的栽培肠道细菌的多酶能力饲养在绿水中

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摘要

Equilibrium between the gastrointestinal bacterial population and the environment is a critical factor for the health of captive aquatic animals. The bacterial enzymes are fundamental for proper nutrition and pathogen resistance in shrimp. Therefore, enzymatic profiles reveal essential characteristics for the selection of probiotic strains that can improve animal development. In this work, we analysed shrimp from a green water system where infectious myonecrosis virus (IMNV) was present. We isolated transient and intestine resident bacterial populations, characterising eight functional groups through different culture media. To identify each isolated bacteria, we used sequences from regions V6-V8 of the 16S rRNA. To determine viral load of shrimp samples, we used real-time PCR. The number of colony forming units (CFU) was similar between IMNV-infected and IMNV-uninfected shrimps. The growth of transient bacteria was higher than the growth of resident. In general, lipolytic bacteria presented higher frequency and genus diversity than the other functional groups. All groups showed higher frequency among transitory bacteria, except the amylolytic functional group, which was more frequent among the resident. We found two major orders of cultivable bacteria, Vibrionales and Bacillales. The genus Vibrio was predominant among the Vibrionales, while Staphylococcus and Bacillus were the most frequent among the Bacillales. Recorded Vibrionales and Bacillales included pathogenic and beneficial species of high importance for aquaculture. The results presented here will serve as a basis for improving the nutritional and health conditions of Litopenaeus vannamei in green water farming systems.
机译：胃肠细菌种群与环境之间的平衡是俘虏水生动物健康的关键因素。细菌酶是虾仁营养和病原体抗性的基础。因此，酶促曲线揭示了选择能够改善动物发育的益生菌菌株的基本特征。在这项工作中，我们分析了来自一种绿色水系统的虾，其中存在传染性肌坏死病毒（IMNV）。我们孤立的瞬态和肠犬细菌种群，通过不同的培养基表征八个官能团。为了鉴定每种分离的细菌，我们使用16S rRNA的区域V6-V8的序列。为了确定虾样品的病毒载量，我们使用了实时PCR。菌落形成单位（CFU）的数量在IMNV感染和IMNV-无感染的虾之间相似。瞬态细菌的生长高于居民的生长。通常，脂肪溶解细菌呈现比其他官能团更高的频率和属性。除淀粉溶解官能团外，所有基团在暂性细菌中显示出较高的频率，在常规中更频繁。我们发现两种主要培养细菌，血管和杆状芽孢杆菌。在血管中，颤音属占主导地位，而葡萄球菌和芽孢杆菌在杆状物中最常见。记录的血管和杆状物包括对水产养殖高度重要的致病性和有益物种。此处提出的结果将作为改善绿色水资源系统中Litopenaeus Vannamei的营养和健康状况的基础。

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