Low-diversity bacterial microbiota in Southern Ocean representatives of lanternfish genera Electrona, Protomyctophum and Gymnoscopelus (family Myctophidae)

Autoři: Alison Gallet aff001;  Philippe Koubbi aff002;  Nelly Léger aff004;  Mathilde Scheifler aff005;  Magdalena Ruiz-Rodríguez aff005;  Marcelino T. Suzuki aff006;  Yves Desdevises aff005;  Sébastien Duperron aff001
Působiště autorů: Muséum National d’Histoire Naturelle, CNRS, Molécules de Communication et Adaptation des Micro-organismes, MCAM, Muséum national d’Histoire naturelle, Paris, France aff001;  IFREMER, Channel and North Sea Fisheries Research Unit, Boulogne-sur-Mer, France aff002;  UFR 918 « Terre, Environnement, Biodiversité », Sorbonne Université, place Jussieu, Paris, France aff003;  Sorbonne Université, Biologie des Organismes et Ecosystèmes Aquatiques BOREA, Paris, France aff004;  Sorbonne Université, CNRS, Biologie Intégrative des Organismes Marins, BIOM, Observatoire Océanologique, Banyuls/Mer, France aff005;  Sorbonne Université, CNRS, Laboratoire de Biodiversité et Biotechnologies Microbiennes, LBBM Observatoire Océanologique, Banyuls/Mer, France aff006;  Institut Universitaire de France, Paris, France aff007
Vyšlo v časopise: PLoS ONE 14(12)
Kategorie: Research Article
doi: https://doi.org/10.1371/journal.pone.0226159


Myctophids are among the most abundant mesopelagic teleost fishes worldwide. They are dominant in the Southern Ocean, an extreme environment where they are important both as consumers of zooplankton as well as food items for larger predators. Various studies have investigated myctophids diet, but no data is yet available regarding their associated microbiota, despite that the significance of bacterial communities to fish health and adaptation is increasingly acknowledged. In order to document microbiota in key fish groups from the Southern Ocean, the bacterial communities associated with the gut, fin, gills and light organs of members of six species within the three myctophid genera Electrona, Protomyctophum and Gymnoscopelus were characterized using a 16S rRNA-based metabarcoding approach. Gut communities display limited diversity of mostly fish-specific lineages likely involved in food processing. Fin and skin communities display diversity levels and compositions resembling more those found in surrounding seawater. Community compositions are similar between genera Electrona and Protomyctophum, that differ from those found in Gymnoscopelus and in water. Low abundances of potentially light-emitting bacteria in light organs support the hypothesis of host production of light. This first description of myctophid-associated microbiota, and among the first on fish from the Southern Ocean, emphasizes the need to extend microbiome research beyond economically-important species, and start addressing ecologically-relevant species.

Klíčová slova:

Bacteria – Fish – Gastrointestinal tract – Gills – Marine fish – Microbiome – Mollicutes – Antarctic Ocean


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