Bacterial Communities From Two Freshwater AquacultureSystems in Northern Germany

Autor: Clols-Fuentes, J; Nguinkal, JA; Unger, P; Kreikemeyer, B; Palm HW
In:

Environmental Microbiology Reports

Bandangabe: 16
Auflage: 6
Gesamttitelundnr1: Bacterial Communities From Two Freshwater AquacultureSystems in Northern Germany
Ergaenzung: e70062
ISBN: 1758-2229 & 1758-2229
DOI: https://doi.org/10.1111/1758-2229.70062
Seite: 1 - 17
Jahr: 2024

Einordung:
Institut: Professur Aquakultur und Sea-Ranching

Abstract:
The microbial communities in aquaculture systems are primarily affected by changes in water quality, fish metabolism, feedingstrategies and fish disease prevention treatments. Monitoring changes in aquatic microbiomes related to aquaculture activitiesis necessary to improve management strategies and reduce the environmental impact of aquaculture water discharge. Thisstudy assessed the effects of activities within two fish farms on water microbiome composition by analysing the water enteringand leaving both systems. Additionally, pathogenic bacterial species associated with common fish diseases were identified.The abundance, diversity and identity of microorganisms were evaluated using 16S rRNA hypervariable gene region ampliconsequencing. Proteobacteria (38.2%) and Bacteroidetes (31.3%) were the most abundant phyla in all water samples. Changes inmicrobiome composition after passage through the fish tanks were observed in several taxa, such as Nitrospirae, Chloroflexi,Deferribacteres and Cyanobacteria. Flavobacterium sp. and Pseudomonas sp. were the predominant potential pathogens andheterotrophic bacteria detected in both farms. Several chemolithotrophic bacteria and archaea were found in the natural reser-voir used for aquaculture activities, while water microbiomes in the aquaculture systems were generally dominated by hetero-trophic organisms.

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