Effect of yeast species and processing on intestinal microbiota of Atlantic salmon (Salmo salar) fed soybean meal-based diets in seawater

• DOI: 10.1186/s42523-023-00242-y
• Publication Date: 2023-04-04T12:03:49Z
• Authors: Jeleel O. Agboola; Sérgio D. C. Rocha; Dominic D. Mensah; Jon Ø. Hansen; Ove Øyås; David Lapeña; Liv T. Mydland; Magnus Ø. Arntzen; Svein J. Horn; Margareth Øverland
• Keywords: 2. Zero hunger; Microbial diversity; 0303 health sciences; Veterinary medicine; Research; Gut microbiota; Predicted metabolic capacity; Microbiology; 6. Clean water; QR1-502; SBMIE; 03 medical and health sciences; Wickerhamomyces anomalus; SF600-1100; 14. Life underwater; Cyberlindnera jadinii

Abstract Background Yeasts are gaining attention as alternative ingredients in aquafeeds. However, the impact of yeast inclusion on modulation intestinal microbiota fish fed plant-based is limited. Thus, present study investigates effects and processing composition, diversity predicted metabolic capacity gut Atlantic salmon smolt soybean meal (SBM)-based diet. Two yeasts, Cyberlindnera jadinii (CJ) Wickerhamomyces anomalus (WA), were produced in-house processed by direct heat-inactivation with spray-drying (ICJ IWA) or autolyzed at 50 °C for 16 h, followed (ACJ AWA). In a 42-day feeding experiment, one six diets: fishmeal (FM)-based diet, challenging diet 30% SBM four other diets containing 10% each products (i.e., ICJ, ACJ, IWA Microbial profiling digesta samples was conducted using 16S rRNA gene sequencing, capacities determined genome-scale models. Results The microbial composition differed between FM those dominated members lactic acid bacteria, which similar to inactivated yeasts diets). Inclusion AWA diets) reduced richness fish. ACJ genus Pediococcus showed increase mucin O-glycan degradation compared diets. highly family Bacillaceae . Conclusions that dietary differentially modulate did not alter caused SBM-based Fish increased relative abundance Pediococcus, pathway