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  • Title: Taxonomic and functional metagenomic profiling of gastrointestinal tract microbiome of the farmed adult turbot (Scophthalmus maximus).
    Author: Xing M, Hou Z, Yuan J, Liu Y, Qu Y, Liu B.
    Journal: FEMS Microbiol Ecol; 2013 Dec; 86(3):432-43. PubMed ID: 23802730.
    Abstract:
    Metagenomics combined with 16S rRNA gene sequence analyses was applied to unveil the taxonomic composition and functional diversity of the farmed adult turbot gastrointestinal (GI) microbiome. Proteobacteria and Firmicutes which existed in both GI content and mucus were dominated in the turbot GI microbiome. 16S rRNA gene sequence analyses also indicated that the turbot GI tract may harbor some bacteria which originated from associated seawater. Functional analyses indicated that the clustering-based subsystem and many metabolic subsystems were dominant in the turbot GI metagenome. Compared with other gut metagenomes, quorum sensing and biofilm formation was overabundant in the turbot GI metagenome. Genes associated with quorum sensing and biofilm formation were found in species within Vibrio, including Vibrio vulnificus, Vibrio cholerae and Vibrio parahaemolyticus. In farmed fish gut metagenomes, the stress response and protein folding subsystems were over-represented and several genes concerning antibiotic and heavy metal resistance were also detected. These data suggested that the turbot GI microbiome may be affected by human factors in aquaculture. Additionally, iron acquisition and the metabolism subsystem were more abundant in the turbot GI metagenome when compared with freshwater fish gut metagenome, suggesting that unique metabolic potential may be observed in marine animal GI microbiomes.
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