Genecology Research Centre, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, Qld, Australia.
Ridley Aqua-Feed Pty, Narangba, Qld, Australia.
J Appl Microbiol. 2018 Oct;125(4):952-963. doi: 10.1111/jam.13930. Epub 2018 Jul 24.
Factors such as seasonal temperature and diet components, for example, fishmeal (FM) inclusion, can influence the composition of the gut microbiota of fish. In this study, we examined changes in the gut bacterial populations, in particular lactic acid bacteria (LAB), of farmed Tasmanian Atlantic salmon in response to different diets, during periods of higher water temperature.
Between December 2011 and March 2012 hindgut faecal samples were collected from Atlantic salmon from a commercial fish farm in south of Hobart, Tasmania, fed with one of four trial diets containing either high or low FM inclusion levels with or without prebiotics. Overall there was little difference in the cultivatable bacterial populations in response to varying levels of FM and prebiotic supplementation, with LAB counts decreasing in response to increased water temperatures. However, it was observed that the high FM diet supported the presence of LAB in January, when these were not detected in the low FM diets.
Our study indicates that the inclusion of higher amounts of FM rather than the addition of prebiotics has a greater effect on LAB colonization of the gut in Atlantic salmon.
This study highlights the importance of the new fish feeds for promoting salmon health in aquaculture industry.
季节性温度和饮食成分等因素，例如鱼粉（FM）的添加，会影响鱼类肠道微生物群的组成。本研究旨在探讨在较高水温下，养殖塔斯马尼亚大西洋鲑肠道细菌种群（尤其是乳酸菌（LAB））对不同饮食的变化。
2011 年 12 月至 2012 年 3 月，从塔斯马尼亚州霍巴特南部的一个商业养殖场采集大西洋鲑的后肠粪便样本，这些鱼分别用四种试验饲料之一喂养，这些饲料含有高或低水平的 FM 和/或添加了益生元。总的来说，FM 和益生元添加水平的变化对可培养细菌种群的影响不大，LAB 计数随着水温的升高而减少。然而，我们观察到高 FM 饮食支持 LAB 的存在，而在低 FM 饮食中则未检测到 LAB。
本研究表明，较高水平的 FM 摄入而非益生元的添加对大西洋鲑肠道中 LAB 的定植有更大的影响。
本研究强调了新型鱼类饲料在水产养殖行业中促进鲑鱼健康的重要性。
