文献类型：期刊文献

英文题名：Effects of reducing dietary fishmeal with yeast supplementations on Litopenaeus vannamei growth, immune response and disease resistance against Vibrio harveyi

作者：Ayiku, Stephen[1,2,3];Shen, Jianfei[1,2,3];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, Peoples R China

年份：2020

卷号：239

外文期刊名：MICROBIOLOGICAL RESEARCH

收录：SCI-EXPANDED(收录号：WOS:000565563300008)、、EI(收录号：20202908950693)、Scopus(收录号：2-s2.0-85087936621)、WOS

基金：This work was supported by the National Key R&D Program of China (2019YFD0900200), National Science Foundation of China (No. 31772864) and Natural Science Foundation of Guangdong Province (2018A030313154 & 2020A1515011129).

语种：英文

外文关键词：Yeast culture; Shrimp; Growth; Intestinal health; Vibrio harveyi

外文摘要：The aim of this experiment was to investigate the effects of reducing dietary fishmeal (FM) with yeast culture (SYC) supplementation on growth, immune response, intestinal microbiota, intestinal morphology, and disease resistance of Litopenaeus vannamei. A total of 480 shrimps with an average initial body weight of 0.35 +/- 0.002 g were randomly distributed into twelve tanks. Three isonitrogenous (40.00 crude protein) and isolipidic (8.00 crude lipids) diets with yeast culture supplementing fishmeal were formulated. The groups were divided into two (2) namely control group and experimental groups. The formulations of the groups were control (0 %, without yeast culture) and the experiment groups (SYC) [(1 % of yeast culture), and (2 % of yeast culture)]. Each diet was delivered in four replicate per treatment group. The results indicate significant improvement on the growth indices (specific growth rate, weight gain rate, survival rate and lower feed conversion ratio) with yeast culture treatment group after 56 days feeding trials (P < 0.05). Total hemolymph protein, superoxide dismutase, catalase, alkaline phosphatase, acid phosphatase, lysozyme and phenoxidase were enhanced but low aspartate aminotransferase, alanine aminotransferase, and glucose were observed in shrimp fed yeast culture diets (P < 0.05). The SYC groups showed insignificant differences in hemolymph cholesterol and triglyceride. Proteobacteria, Bacteroidetes, and Actinobacteria were the dominant bacteria found in all the SYC groups. At the genus level, Vibrio was significantly decreased (P < 0.05) in 2 % yeast culture diets supplemented group whereas the beneficial bacteria Pseudoalteromonas was significantly enhanced. Moreover, intestinal villus length and width in shrimps fed yeast culture diets were improved (P < 0.05). Dietary yeast culture supplementation can improve growth, intestinal health, immune response, and resistance against Vibrio harveyi infections in L. vannamei.