Impact of Putative Probiotics on Growth, Behavior, and the Gut Microbiome of Farmed Arctic Char (Salvelinus alpinus) - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Frontiers in Microbiology Année : 2022

Impact of Putative Probiotics on Growth, Behavior, and the Gut Microbiome of Farmed Arctic Char (Salvelinus alpinus)

Stephen Knobloch
  • Fonction : Auteur
Sigurlaug Skírnisdóttir
  • Fonction : Auteur
Marianne Dubois
  • Fonction : Auteur
Alexandra Leeper
  • Fonction : Auteur
Viggó Þ. Marteinsson
  • Fonction : Auteur

Résumé

Beneficial bacteria promise to promote the health and productivity of farmed fish species. However, the impact on host physiology is largely strain-dependent, and studies on Arctic char (Salvelinus alpinus), a commercially farmed salmonid species, are lacking. In this study, 10 candidate probiotic strains were subjected to in vitro assays, small-scale growth trials, and behavioral analysis with juvenile Arctic char to examine the impact of probiotic supplementation on fish growth, behavior and the gut microbiome. Most strains showed high tolerance to gastric juice and fish bile acid, as well as high auto-aggregation activity, which are important probiotic characteristics. However, they neither markedly altered the core gut microbiome, which was dominated by three bacterial species, nor detectably colonized the gut environment after the 4-week probiotic treatment. Despite a lack of long-term colonization, the presence of the bacterial strains showed either beneficial or detrimental effects on the host through growth rate enhancement or reduction, as well as changes in fish motility under confinement. This study offers insights into the effect of bacterial strains on a salmonid host and highlights three strains, Carnobacterium divergens V41, Pediococcus acidilactici ASG16, and Lactiplantibacillus plantarum ISCAR-07436, for future research into growth promotion of salmonid fish through probiotic supplementation.

Dates et versions

hal-04203834 , version 1 (11-09-2023)

Identifiants

Citer

Stephen Knobloch, Sigurlaug Skírnisdóttir, Marianne Dubois, Laetitia Kolypczuk, Francoise Leroi, et al.. Impact of Putative Probiotics on Growth, Behavior, and the Gut Microbiome of Farmed Arctic Char (Salvelinus alpinus). Frontiers in Microbiology, 2022, 13, 912473 (14p.). ⟨10.3389/fmicb.2022.912473⟩. ⟨hal-04203834⟩
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