Publications des scientifiques de l'IRD

Gadoin E., Desnues C., D'Orbcastel E. R., Bouvier T., Auguet J. C., Dagorn Laurent, Moroh J. L., Adingra A., Bettarel Yvan. (2022). Fishing for the microbiome of tropical Tuna. Microbial Ecology, [Early access], [14 p.]. ISSN 0095-3628.

Titre du document
Fishing for the microbiome of tropical Tuna
Année de publication
2022
Type de document
Article référencé dans le Web of Science WOS:000840276000001
Auteurs
Gadoin E., Desnues C., D'Orbcastel E. R., Bouvier T., Auguet J. C., Dagorn Laurent, Moroh J. L., Adingra A., Bettarel Yvan
Source
Microbial Ecology, 2022, [Early access], [14 p.] ISSN 0095-3628
Although tunas represent a significant part of the global fish economy and a major nutritional resource worldwide, their microbiome still remains poorly documented. Here, we conducted an analysis of the taxonomic composition of the bacterial communities inhabiting the gut, skin, and liver of two most consumed tropical tuna species (skipjack and yellowfin), from individuals caught in the Atlantic and Indian oceans. We hypothesized that each organ harbors a specific microbial assemblage whose composition might vary according to different biotic (sex, species) and/or abiotic (environmental) factors. Our results revealed that the composition of the tuna microbiome was totally independent of fish sex, regardless of the species and ocean considered. Instead, the main determinants of observed diversity were (i) tuna species for the gut and (ii) sampling site for the skin mucus layer and (iii) a combination of both parameters for the liver. Interestingly, 4.5% of all amplicon sequence variants (ASV) were shared by the three organs, highlighting the presence of a core-microbiota whose most abundant representatives belonged to the genera Mycoplasma, Cutibacterium, and Photobacterium. Our study also revealed the presence of a unique and diversified bacterial assemblage within the tuna liver, comprising a substantial proportion of potential histamine-producing bacteria, well known for their pathogenicity and their contribution to fish poisoning cases. These results indicate that this organ is an unexplored microbial niche whose role in the health of both the host and consumers remains to be elucidated.
Plan de classement
Limnologie biologique / Océanographie biologique [034] ; Ressources halieutiques [040] ; Biotechnologies [084]
Description Géographique
ATLANTIQUE ; OCEAN INDIEN ; COTE D'IVOIRE ; REUNION ; ZONE TROPICALE
Localisation
Fonds IRD [F B010085984]
Identifiant IRD
fdi:010085984
Contact