Fishing for the Virome of Tropical Tuna

Type Article
Date 2021-07
Language English
Author(s) Gadoin Elsa4, Desnues Christelle2, Monteil-Bouchard Sonia2, Bouvier ThierryORCID3, Auguet Jean-Christophe3, Roque D'Orbcastel Emmanuelle1, Bettarel Yvan5
Affiliation(s) 1 : MARBEC, Université de Montpellier, CNRS, Ifremer, IRD, 34095 Montpellier, France
2 : Mediterranean Institute of Oceanography (MIO), 13009 Marseille, France
3 : MARBEC, Université de Montpellier, CNRS, Ifremer, IRD, 34095 Montpellier, France
4 : MARBEC, Université de Montpellier, CNRS, Ifremer, IRD, 34095 Montpellier, France
5 : MARBEC, Université de Montpellier, CNRS, Ifremer, IRD, 34095 Montpellier, France
Source Viruses-basel (1999-4915) (MDPI AG), 2021-07 , Vol. 13 , N. 7 , P. 1291 (8p.)
DOI 10.3390/v13071291
Note This article belongs to the Section Animal Viruses
Keyword(s) tuna, virome diversity, microbiome
Abstract

While planktonic viruses have received much attention in recent decades, knowledge of the virome of marine organisms, especially fish, still remains rudimentary. This is notably the case with tuna, which are among the most consumed fish worldwide and represent considerable economic, social and nutritional value. Yet the composition of the tuna virome and its biological and environmental determinants remain unknown. To begin to address this gap, we investigated the taxonomic diversity of viral communities inhabiting the skin mucus, gut and liver of two major tropical tuna species (skipjack and yellowfin) in individuals fished in the Atlantic and Indian Oceans. While we found significant differences in the virome composition between the organs, this was totally independent of the tuna species or sex. The tuna virome was mainly dominated by eukaryotic viruses in the digestive organs (gut and liver), while bacteriophages were predominant in the mucus. We observed the presence of specific viral families in each organ, some previously identified as fish or human pathogens (e.g., Iridoviridae, Parvoviridae, Alloherpesviridae, Papillomaviridae). Interestingly, we also detected a ‘core virome’ that was shared by all the organs and was mainly composed of Caudovirales, Microviridae and Circoviridae. These results show that tuna host a mosaic of viral niches, whose establishment, role and circulation remain to be elucidated

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