Marine aggregates in North Atlantic coast: Microbial characteristics and potential interactions with farmed Atlantic salmon (Salmo salar)

Isabelle Poirier; David Benhaïm; Emmanuel Poizot; Régis Kévin Gallon; Elodie Cauvin; Alexis Lemarchand; Martine Bertrand; Céline Lelièvre; Anne Murat; Fabienne Benoit; Yann Méar

doi:10.1016/j.marenvres.2019.104864

Journal articles

Marine aggregates in North Atlantic coast: Microbial characteristics and potential interactions with farmed Atlantic salmon (Salmo salar)

Isabelle Poirier ^{1, 2} David Benhaïm ^{1, 3, 2} Emmanuel Poizot ^{1, 2} Régis Kévin Gallon ^{1, 2} Elodie Cauvin ⁴ Alexis Lemarchand ⁵ Martine Bertrand ^{1, 2} Céline Lelièvre ² Anne Murat ^{1, 2} Fabienne Benoit ⁴ Yann Méar ^{1, 2}

1 EPN8

INSTM - Institut National des Sciences et Technologies de la Mer [Salammbô]

2 LUSAC - Laboratoire Universitaire des Sciences Appliquées de Cherbourg

3 Department of Aquaculture and Fish Biology

4 LABÉO - LABÉO, Pôle d’analyses et de recherche de Normandie

5 GMG

Abstract : Microbial contamination of aggregates collected near an Atlantic salmon farm, in the Cherbourg roadstead, was followed monthly over one year to study the dynamics of Vibrio spp. and explore their impact on farmed fish. Salmon state of health was followed through blood and histopathological analyses. Vibrio were systematically found in aggregates with particularly high concentration in August. The Splendidus clade was strongly dominant in aggregates as well as in gills, and an increase in Vibrio diversity was observed in summer and autumn. Results did not demonstrate that aggregates directly impact the bacterial community of gills, but they suggested an aggregates-gills interaction. Gill contamination was correlated with water temperature and probably impacted by amoebae. Vibrio renipiscarius and Vibrio toranzoniae were isolated in North Atlantic for the first time. A better understanding of the interaction between marine aggregates, Vibrio spp. and fish is essential to improve salmon cage farming.

Keywords : Aquaculture Cherbourg roadstead Coastal waters Dynamics of Vibrio spp. Haematological analysis Marine aggregates Microbial contamination Salmon

Document type :

Journal articles

Domain :

Life Sciences [q-bio] / Animal biology / Veterinary medicine and animal Health

Complete list of metadatas

https://hal-normandie-univ.archives-ouvertes.fr/hal-02937802
Contributor : Erika Hue <>
Submitted on : Monday, September 14, 2020 - 2:14:52 PM
Last modification on : Friday, October 23, 2020 - 5:20:03 PM

Marine aggregates in North Atlantic coast: Microbial characteristics and potential interactions with farmed Atlantic salmon (Salmo salar)

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Marine aggregates in North Atlantic coast: Microbial characteristics and potential interactions with farmed Atlantic salmon (Salmo salar)

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