文献类型：期刊文献

英文题名：Effects of dietary yeast culture on shrimp growth, immune response, intestinal health and disease resistance against Vibrio harveyi

作者：Ayiku, Stephen[1,3];Shen, Jian-Fei[1,3];Tan, Bei-Ping[1,2,3];Dong, Xiao-Hui[1,2,3];Liu, Hong-Yu[1,2,3]

机构：[1]Guangdong Ocean Univ, Coll Fisheries, Lab Aquat Anim Nutr & Feed, Zhanjiang 524088, Guangdong, Peoples R China;[2]Minist Agr, Key Lab Aquat Livestock & Poultry Feed Sci & Tech, Zhanjiang 524000, Guangdong, Peoples R China;[3]Aquat Anim Precis Nutr & High Efficiency Feed Eng, Zhanjiang, Guangdong, Peoples R China

年份：2020

卷号：102

起止页码：286

外文期刊名：FISH & SHELLFISH IMMUNOLOGY

收录：SCI-EXPANDED(收录号：WOS:000537822700033)、、WOS

基金：This work was supported by the National Key R&D Program of China (2019YFD0900200) and National Science Foundation of China (No. 31772864), Natural Science Foundation of Guangdong Province (2018A030313154 & 2020A1515011129). We are grateful to the Beijing Enhalor International Tech Co., Ltd., for providing Yeast culture products.

语种：英文

外文关键词：Yeast culture; Litopenaeus vannamei; Growth; Immune response; Vibrio harveyi

外文摘要：The current study was conducted to evaluate the effects of different levels of yeast culture (YC) supplementation at 0% (YC 0%), 1% (YC 1%), and 2% (YC 2%) on growth, feed conversion ratio, body composition, intestinal morphology, microflora, immune response, and resistance to Vibrio harveyi infection in Litopenaeus vannamei. After 8-weeks feeding trial, the results showed significant improvement (p < .05) in the final weight, weight gain rate, specific growth rate, survival rate and low feed conversion ratio in YC groups than the control. Serum total protein, superoxide dismutase, catalase, alkaline phosphatase, acid phosphatase, lysozyme, and phenol oxidase in shrimps fed diet YC (2%) were significantly higher (p < .05), whereas significantly decreased trend in serum cholesterol, triglyceride, aspartate aminotransferase, and alanine aminotransferase (p < .05) were observed in YC (2%) diet. Proteobacteria, Bacteroidetes, Actinobacteria, and Firmicutes were the core phylum bacteria found in the shrimp intestines. At the genus level, opportunistic pathogenic bacteria, Vibrio was significantly decreased (p < .05) while beneficial bacteria Pseudoalteromonas was increased in YC (2%) group. Intestinal villus height and width in shrimps fed YC diets were significantly improved than the control diet (p < .05). YC groups challenged test significantly showed (p < .05) improved shrimps immune response against V. harveyi infections with YC (2%) recording the highest percentage survival rate (70%). The present study demonstrated that supplementing YC (2%) can improve growth, intestinal microbiota, intestinal morphology, and immune response against V. harveyi infections in L. vannamei.