Key Laboratory of Microecological Resources and Utilization in Breeding Industry, Ministry of Agriculture and Rural Affairs, Guangzhou, Guangdong, China.
Institute of hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei, China.
PeerJ. 2023 Oct 12;11:e15892. doi: 10.7717/peerj.15892. eCollection 2023.
To maintain the health of aquaculture fish, it is critical to understand the composition of microorganisms in aquaculture water and sediment and the factors affecting them. This study examined the water and sediment microbiota compositions of four different types of ponds in South China that were used to culture grass carp () of different sizes through high-throughput sequencing of the 16S rRNA gene, and analyzed their correlations with environmental factors. The results showed that ponds with cultured grass carp of different sizes exhibited significant differences in terms of water physicochemical properties and composition of water and sediment microbiota. Furthermore, the exchange of microorganisms between water and sediment microbiota was lowest in ponds with the smallest grass carp and highest in ponds with the largest grass carp. All detected environmental factors except water temperature were significantly correlated with the water microbiota, and all detected environmental factors in the sediment were correlated with sediment microbiota. Moreover, and were significantly increased in the water microbiota, especially in ponds with small juvenile grass carp, implying an increased risk of and infections in these environments. Our results provide useful information for the management of grass carp aquaculture ponds.
为了维持水产养殖鱼类的健康，了解水产养殖水和沉积物中微生物的组成以及影响它们的因素至关重要。本研究通过高通量测序 16S rRNA 基因，对中国南方四种不同类型的池塘的水和沉积物微生物群落组成进行了研究，这些池塘用于养殖不同大小的草鱼（），并分析了它们与环境因素的相关性。结果表明，养殖不同大小草鱼的池塘在水理化性质和水及沉积物微生物群落组成方面存在显著差异。此外，在草鱼最小的池塘中，水和沉积物微生物群落之间的微生物交换最低，而在草鱼最大的池塘中则最高。除水温外，所有检测到的环境因素均与水微生物群落显著相关，而沉积物中所有检测到的环境因素均与沉积物微生物群落相关。此外，在水微生物群落中，和显著增加，特别是在幼鱼草鱼的池塘中，这意味着这些环境中感染和的风险增加。我们的研究结果为草鱼养殖池塘的管理提供了有用的信息。
