Abstract
Pond aquaculture has become the most important and broadest breeding model in China, and an extremely important source of aquatic products, but the potential hazard factors of potential pathogenic bacteria (PPB), antibiotic resistance bacteria (ARB), and antibiotic resistance genes (ARGs) in aquaculture environment are largely invisible. In the present study, the bacterial communities in the larvae, juvenile, rearing, and harvesting culture stages of great grass carp (Ctenopharyngodon idellus) ponds were investigated and the structure of microbial flora analysis showed that the larvae culture stage has the highest abundance and the most dominant phyla were Proteobacteria (27.8%). A total of 123 significant Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway annotations and the relative abundance of nine bacterial phenotypes implied that the larvae culture stage had the most abundance of pathogenic potential and mobile elements. The correlation analyses of environmental factors showed that temperature, stocking density, pH, and transparency showed the significant impacts on both the distribution of microbiome and the PPB. More importantly, a total of 40 ARB were identified, and 16 ARGs have the detection rates of 100%, which revealed that they are widely distributed and highly enriched in the aquaculture production. Notably, this is the first robust report to analyze and understand the PPB, ARB, and ARGs characteristics and dynamic changes in the pond aquaculture.






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Funding
This work was supported by Key Realm R&D Program of GuangDong Provice (No. 2020B0202080005), China Agriculture Research System of MOF and MARA (CARS-45-50), Science and Technology Program of Guangzhou (No. 20212100006), Key Project of Education Department of Hunan Province (20A032), China Scholarship Council (No. 201908440582); Talent introduction special funds of South China Agricultural University (No. K16226).
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The authors thank Guangzhou Chengyi Aquatic Products Technology Co., Ltd. and Dr. D.D. Zhao for assistance in samples collection. AZ, JZ, GX, and SX: writing—conceptualization, original draft, and formal analysis; GX, JZ, WZ, and AZ, funding acquisition; XL and YZ: methodology, writing—review and editing; AZ, JZ, LZ, ZZ, and HT: resources, formal analysis, data curation, visualization; ZZ: software.
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Zhou, A., Xie, S., Tang, H. et al. The dynamic of the potential pathogenic bacteria, antibiotic-resistant bacteria, and antibiotic resistance genes in the water at different growth stages of grass carp pond. Environ Sci Pollut Res 29, 23806–23822 (2022). https://doi.org/10.1007/s11356-021-17578-0
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DOI: https://doi.org/10.1007/s11356-021-17578-0

