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Skin Culturable Microbiota in Farmed European Seabass (Dicentrarchus labrax) in Two Aquacultures with and without Anibiotic Use

Ramljak, Ana; Vardić Smrzlić, Irena; Kapetanović, Damir; Barac, Fran; Kolda, Anamarija; Perić, Lorena; Balenović, Ivana; Gavrilović, Ana (2022) Skin Culturable Microbiota in Farmed European Seabass (Dicentrarchus labrax) in Two Aquacultures with and without Anibiotic Use. Journal of marine science and engineering, 10 (3). ISSN 2077-1312

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This study examined culturable skin microbiota that was associated with farmed European seabass (Dicentrarchus labrax). Healthy European seabass were sampled during summer commercial harvest from one conventional fish farm where antibiotics are used, and from another practicing a certified antibiotic-free fish aquaculture. Physicochemical and microbiological analysis of seawater and sediment were performed, as well as determination of culturable bacteria, including Vibrio, from skin swabs of European seabass and seawater and sediment at both farms. Samples were processed for isolation of bacteria and their characterization by molecular and antibiotic susceptibility tests. In both fish farms, most of the bacteria that were identified in the skin belonged to the genera Pseudomonas and Vibrio. Some of the microbiota that were identified are known to be pathogenic to fish: V. alginolyticus, V. anguillarum, and V. harveyi. Vibrio strains showed higher resistance to certain antibiotics compared to previous studies. This study provides, for the first time, information on the culturable skin bacteria that is associated with healthy European seabass under culture conditions with and without the use of antibiotics. This information will be useful in assessing how changes in culturable microbiota may affect the health of farmed European seabass, indicating a potential problem for fish health management during disease outbreaks.

Item Type: Article
Uncontrolled Keywords: bacteria ; European seabass aquaculture ; Adriatic Sea ; antibiotic resistance ; Pseudomonas ; Vibrio
Subjects: NATURAL SCIENCES > Biology
NATURAL SCIENCES > Interdisciplinary Natural Sciences
Divisions: Division for Marine and Enviromental Research
Project titleProject leaderProject codeProject type
Prilagodba uzgoja bijele ribe klimatskim promjenamaKlanjšček, TinIP-2018-01-3150HRZZ
Depositing User: Sofija Konjević
Date Deposited: 10 Mar 2022 14:27
DOI: 10.3390/jmse10030303

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