Identificador persistente para citar o vincular este elemento: http://hdl.handle.net/10553/126985
Título: Genetically superior European sea bass (Dicentrarchus labrax) and nutritional innovations: Effects of functional feeds on fish immune response, disease resistance, and gut microbiota
Autores/as: Rimoldi, Simona
Montero Vítores, Daniel 
Torrecillas Burriel,Silvia 
Serradell, Antonio
Acosta Arbelo, Félix Antonio 
Haffray, Pierrick
Hostins, Barbara
Fontanillas, Ramon
Allal, François
Bajek, Aline
Terova, Genciana
Clasificación UNESCO: 310502 Piscicultura
310406 Nutrición
Palabras clave: Bacilli
DNA barcoding
Firmicutes
Metagenomics
Proteobacteria
Fecha de publicación: 2023
Proyectos: Genomic and nutritional innovations for genetically superior farmed fish to improve efficiency in European aquaculture 
Publicación seriada: Aquaculture Reports 
Resumen: The objective of this study was to determine if selected fish genotypes could benefit from the use of functional additives in novel aqua feed formulations to improve growth performance, gut microbiota, immune response, and disease resistance in fish. Two batches of juvenile European sea bass selected for high growth (HG; selected sires x selected dams), and wild types (WT; wild sires x selected females) were fed a “future diet” coated with three different functional additives for 12 weeks as follows: (i) 2 weeks with a high dose, followed by (ii) 10 weeks with a low dose. The functional additives tested were a mixture of probiotics (PROB), organic acids (ORG), and phytogens (PHYTO). A pathogen challenge test (Vibrio anguillarum) and a stress condition (overcrowding) were performed after each dose. At the end of the feeding experiment, fish from the HG group performed better than fish from the WT group in terms of body weight, relative growth, SGR, and DGI. The results of the two challenge tests performed after two weeks of high dose and ten weeks of low dose showed a significant effect of diet on fish survival. GALT-associated gene expression analysis revealed an interaction between the genotype and diet for il-1β in the distal gut. Finally, regarding the gut microbiota, discriminant analysis showed no clear separation between fish fed the future diet and those fed the same diet with experimental additives. Nevertheless, the relative abundance of certain taxa varied between experimental groups. For example, fish fed the ORG diet had higher relative abundance of Streptococcus in both genotypes, whereas fish fed the PHYTO diet had higher abundance of Lactobacillales. In contrast, fish fed PROB had lower abundance of Pseudomonas and Acinetobacter.
URI: http://hdl.handle.net/10553/126985
ISSN: 2352-5134
DOI: 10.1016/j.aqrep.2023.101747
Fuente: Aquaculture Reports [ISSN 2352-5134], v.33 (Diciembre 2023)
Colección:Artículos
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