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Background <p>Effective microorganisms are increasingly explored in aquaculture to improve fish health and growth without leaving harmful residues. However, their efficacy in real-world pond environments remains poorly understood. Here, we conducted a 103-day field experiment to assess the effects of supplementation with two effective commercial microorganism products on the microbial communities and growth performance of common carp (<i>Cyprinus carpio</i>).</p> Background <p>Effective microorganisms were added to the feed and directly to the pond water. Microbial diversity was analysed via 16&#xa0;S rRNA and whole-genome shotgun sequencing across three environments: water (three time points), sediment (two time points), and fish intestine (one time point) from 25 experimental ponds. Bioinformatics processing was performed using the QIIME2 and MG-TK pipelines with taxonomic classification based on the SILVA database. The results showed that although supplemented bacterial families did not establish significantly in pond environments, fish exposed to specific effective microorganism treatments showed improved growth metrics.</p> Conclusions <p>These findings suggest that effective microorganisms can increase carp growth in aquaculture without significantly altering the resident microbial communities, suggesting a promising residue-free alternative to traditional additives in aquaculture.</p>

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Supplementation with effective microorganisms in earthen ponds affects common carp growth and abundance of specific bacterial families

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年6月23日

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  • Michalina Jakimowicz,
  • Katarzyna Sidorczuk,
  • David Huyben,
  • Falk Hildebrand,
  • Łukasz Napora-Rutkowski,
  • Piotr Hajduk,
  • Marek Sztuka,
  • Magda Mielczarek,
  • Dawid Słomian,
  • Laura Jarosz,
  • Joanna Szyda

摘要

Background

Effective microorganisms are increasingly explored in aquaculture to improve fish health and growth without leaving harmful residues. However, their efficacy in real-world pond environments remains poorly understood. Here, we conducted a 103-day field experiment to assess the effects of supplementation with two effective commercial microorganism products on the microbial communities and growth performance of common carp (Cyprinus carpio).

Background

Effective microorganisms were added to the feed and directly to the pond water. Microbial diversity was analysed via 16 S rRNA and whole-genome shotgun sequencing across three environments: water (three time points), sediment (two time points), and fish intestine (one time point) from 25 experimental ponds. Bioinformatics processing was performed using the QIIME2 and MG-TK pipelines with taxonomic classification based on the SILVA database. The results showed that although supplemented bacterial families did not establish significantly in pond environments, fish exposed to specific effective microorganism treatments showed improved growth metrics.

Conclusions

These findings suggest that effective microorganisms can increase carp growth in aquaculture without significantly altering the resident microbial communities, suggesting a promising residue-free alternative to traditional additives in aquaculture.