Journal of Tianjin Agricultural University ›› 2025, Vol. 32 ›› Issue (5): 47-56.doi: 10.19640/j.cnki.jtau.2025.05.008

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Microbial diversity and correlation analysis of physical and chemical indexes in internal circulating flowing water aquaculture pond of channel catfish

Wei Hongshuo1, Ji Yanbin1,2, Wang Yang1,2,Corresponding Author, Xia Sudong1,2, Sun Xueliang1,2, Song Yilin1   

  1. 1. College of Fisheries, Tianjin Agricultural University, Tianjin 300392, China;
    2. Tianjin Key Laboratory of Aqua-ecology and Aquaculture, Tianjin 300392, China
  • Received:2023-11-10 Published:2025-11-12

Abstract: This study aimed to clarify the changes of microbial diversity in the circulating water pond of channel catfish from July to September, and the changes of physical and chemical factors and their correlation. In the study, a high-throughput sequencing method was used to analyze the environmental microecology of a channel catfish pond in Tianjin, and the water physical and chemical indexes of the aquaculture area and filtration area were determined to analyze the correlation between them. The results showed that the microbial diversity and richness of sediment and that of brush samples in the channel catfish aquaculture pond were higher than those in the water. Among them, the microorganisms in sediment and brush samples had high similarity but low similarity with those in water. Ilumatobacteraceae of Actinobacteria had a significant negative correlation with total phosphorus, which has the potential to be used as an indicator of total phosphorus content in water(P<0.05). There was a very significant positive correlation between the Caldilineaceae family and nitrite nitrogen, and it can regulate nitrite nitrogen in the water(P<0.01). Ammonia nitrogen had a significant effect on the bacterial community structure of sediment(P<0.05). The results provide a reference for the microecology and water quality control of the same type of channel catfish during aquaculture.

Key words: channel catfish, microbial diversity, internal-circulation aquaculture, water quality index

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