Zhao Ruixiang, Symonds Jane E, Walker Seumas P, Steiner Konstanze, Carter Chris G, Bowman John P, Nowak Barbara F
Institute for Marine and Antarctic Studies, University of Tasmania, Newnham, TAS, Australia.
Cawthron Institute, Nelson, New Zealand.
Front Microbiol. 2023 Feb 7;14:1065823. doi: 10.3389/fmicb.2023.1065823. eCollection 2023.
Gut microbiota play important roles in fish health and growth performance and the microbiome in fish has been shown to be a biomarker for stress. In this study, we surveyed the change of Chinook salmon () gut and water microbiota in freshwater recirculating aquaculture systems (RAS) for 7 months and evaluated how gut microbial communities were influenced by fish health and growth performance. The gut microbial diversity significantly increased in parallel with the growth of the fish. The dominant gut microbiota shifted from a predominance of to while constantly dominated the water microbiota. sp. was persistently the major gut microbial community member during the whole experiment and was identified as the core gut microbiota for freshwater farmed Chinook salmon. No significant variation in gut microbial diversity and composition was observed among fish with different growth performance. At the end of the trial, 36 out of 78 fish had fluid in their swim bladders. These fish had gut microbiomes containing elevated proportions of , and . Our study supports the growing body of knowledge about the beneficial microbiota associated with modern salmon aquaculture systems and provides additional information on possible links between dysbiosis and gut microbiota for Chinook salmon.
肠道微生物群在鱼类健康和生长性能中发挥着重要作用，鱼类的微生物组已被证明是应激的生物标志物。在本研究中，我们对淡水循环水养殖系统（RAS）中的奇努克鲑（）肠道和水体微生物群变化进行了7个月的调查，并评估了鱼类健康和生长性能对肠道微生物群落的影响。肠道微生物多样性随着鱼类生长而显著增加。肠道优势微生物群从以 为主转变为以 为主，而 一直主导着水体微生物群。在整个实验过程中， 属一直是主要的肠道微生物群落成员，并被确定为淡水养殖奇努克鲑的核心肠道微生物群。不同生长性能的鱼类之间未观察到肠道微生物多样性和组成的显著差异。试验结束时，78条鱼中有36条鱼鳔中有积液。这些鱼的肠道微生物组中 、 和 的比例升高。我们的研究支持了关于现代鲑鱼养殖系统相关有益微生物群的越来越多的知识，并提供了关于奇努克鲑生态失调与肠道微生物群之间可能联系的更多信息。
