Growth Performance and Adaptability of European Sea Bass (Dicentrarchus labrax) Gut Microbiota to Alternative Diets Free of Fish Products

Type Article
Date 2020-09
Language English
Author(s) Pérez-Pascual David1, Estellé Jordi2, Dutto GilbertORCID3, Rodde Charles4, Bernardet Jean-François5, Marchand Yann6, Duchaud Eric5, Przybyla CyrilleORCID4, Ghigo Jean-Marc1
Affiliation(s) 1 : Unité de Génétique des Biofilms, Institut Pasteur, UMR CNRS2001, 75015 Paris, France
2 : AgroParisTech, GABI, Université Paris-Saclay, INRAE, 78350 Jouy-en-Josas, France
3 : Laboratoire Service d’Expérimentations Aquacoles, Ifremer, 34250 Palavas les flots, France
4 : MARBEC, IRD, IFREMER, Univ Montpellier, CNRS, Laboratoire Adaptation, adaptabilité, des animaux et des systèmes Ifremer, 34250 Palavas les flots, France
5 : Virologie et Immunologie Moléculaires, INRAE, Université Paris-Saclay, 78350 Jouy-en-Josas, France
6 : Le Gouessant, F-22402 Lamballe, France
Source Microorganisms (2076-2607) (MDPI AG), 2020-09 , Vol. 8 , N. 9 , P. 1346 (18p.)
DOI 10.3390/microorganisms8091346
WOS© Times Cited 18
Note This article belongs to the Section Gut Microbiota
Keyword(s) European sea bass, fish gut microbiota, bacteria

Innovative fish diets made of terrestrial plants supplemented with sustainable protein sources free of fish-derived proteins could contribute to reducing the environmental impact of the farmed fish industry. However, such alternative diets may influence fish gut microbial community, health, and, ultimately, growth performance. Here, we developed five fish feed formulas composed of terrestrial plant-based nutrients, in which fish-derived proteins were substituted with sustainable protein sources, including insect larvae, cyanobacteria, yeast, or recycled processed poultry protein. We then analyzed the growth performance of European sea bass (Dicentrarchus labrax L.) and the evolution of gut microbiota of fish fed the five formulations. We showed that replacement of 15% protein of a vegetal formulation by insect or yeast proteins led to a significantly higher fish growth performance and feed intake when compared with the full vegetal formulation, with feed conversion ratio similar to a commercial diet. 16S rRNA gene sequencing monitoring of the sea bass gut microbial community showed a predominance of Proteobacteria, Firmicutes, Actinobacteria, and Bacteroidetes phyla. The partial replacement of protein source in fish diets was not associated with significant differences on gut microbial richness. Overall, our study highlights the adaptability of European sea bass gut microbiota composition to changes in fish diet and identifies promising alternative protein sources for sustainable aquafeeds with terrestrial vegetal complements.

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Pérez-Pascual David, Estellé Jordi, Dutto Gilbert, Rodde Charles, Bernardet Jean-François, Marchand Yann, Duchaud Eric, Przybyla Cyrille, Ghigo Jean-Marc (2020). Growth Performance and Adaptability of European Sea Bass (Dicentrarchus labrax) Gut Microbiota to Alternative Diets Free of Fish Products. Microorganisms, 8(9), 1346 (18p.). Publisher's official version : , Open Access version :