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© J.M. Ghigo (Institut Pasteur) and Brigite Arbeille (LBC-ME. Faculté de Médecine de Tours)
Colorized scanning electron microscopy of an E. coli biofilm developing on a glass surface
Publication : Animal microbiome

Sustainable plant-based diets promote rainbow trout gut microbiota richness and do not alter resistance to bacterial infection.

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Animal microbiome - 05 Jul 2021

Pérez-Pascual D, Pérez-Cobas AE, Rigaudeau D, Rochat T, Bernardet JF, Skiba-Cassy S, Marchand Y, Duchaud E, Ghigo JM,

Link to Pubmed [PMID] – 34225826

Link to DOI – 10.1186/s42523-021-00107-2

Anim Microbiome 2021 Jul; 3(1): 47

Farmed fish food with reduced fish-derived products are gaining growing interest due to the ecological impact of fish-derived protein utilization and the necessity to increase aquaculture sustainability. Although different terrestrial plant proteins could replace fishmeal proteins, their use is associated with adverse effects. Here, we investigated how diets composed of terrestrial vegetal sources supplemented with proteins originating from insect, yeast or terrestrial animal by-products affect rainbow trout (Onchorynchus mykiss) gut microbiota composition, growth performance and resistance to bacterial infection by the fish pathogen Flavobacterium psychrophilum responsible for frequent outbreaks in aquaculture settings.We showed that the tested regimes significantly increased gut bacterial richness compared to full vegetal or commercial-like diets, and that vegetal diet supplemented with insect and yeast proteins improves growth performance compared to full vegetal diet without altering rainbow trout susceptibility to F. psychrophilum infection.Our results demonstrate that the use of insect and yeast protein complements to vegetal fish feeds maintain microbiota functions, growth performance and fish health, therefore identifying promising alternative diets to improve aquaculture’s sustainability.

https://pubmed.ncbi.nlm.nih.gov/34225826