FN Archimer Export Format PT J TI Genetically superior European sea bass (Dicentrarchus labrax) and nutritional innovations: Effects of functional feeds on fish immune response, disease resistance, and gut microbiota BT AF Rimoldi, Simona Montero, Daniel Torrecillas, Silvia Serradell, Antonio Acosta, Felix Haffray, Pierrick Hostins, Barbara Fontanillas, Ramon Allal, Francois Bajek, Aline Terova, Genciana AS 1:1;2:2;3:3;4:2;5:2;6:4;7:5;8:6;9:7;10:8;11:1; FF 1:;2:;3:;4:;5:;6:;7:;8:;9:PDG-RBE-MARBEC-LAAAS;10:;11:; C1 Department of Biotechnology and Life Sciences, University of Insubria, Via J. H. Dunant, 3, 21100 Varese, Italy Grupo de Investigación en Acuicultura (GIA), IU-ECOAQUA, Universidad de Las Palmas de Gran Canaria, Telde, Las Palmas, Canary Islands, Spain Institut de Recerca i Tecnologia Agroalimentàries–IRTA, Barcelona, Spain SYSAAF (French Poultry and Aquaculture Breeders Technical Centre), 35042 Rennes, France INVE Aquaculture, Dendermonde, Belgium Skretting Aquaculture Research Centre, Stavanger, Norway MARBEC, University of Montpellier, CNRS, Ifremer, IRD, 34250 Palavas-les-Flots, France Ecoserie Marine de Graveline Ichtus, Route des Enrochements, 59820 Gravelines, France C2 UNIV INSUBRIA, ITALY UNIV LAS PALMAS GRAN CANARIA, SPAIN IRTA, SPAIN SYSAAF, FRANCE INVE AQUACULTURE, BELGIUM SKRETTING ARC, NORWAY IFREMER, FRANCE ECLOSERIE MARINE GRAVELINES ICHTUS, FRANCE SI PALAVAS SE PDG-RBE-MARBEC-LAAAS UM MARBEC IN WOS Ifremer UMR DOAJ copubli-france copubli-europe IF 3.7 TC 1 UR https://archimer.ifremer.fr/doc/00854/96589/105019.pdf https://archimer.ifremer.fr/doc/00854/96589/105020.docx LA English DT Article DE ;Bacilli;DNA barcoding;Firmicutes;Metagenomics;Proteobacteria AB 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. PY 2023 PD DEC SO Aquaculture Reports SN 2352-5134 PU Elsevier BV VL 33 UT 001082062900001 DI 10.1016/j.aqrep.2023.101747 ID 96589 ER EF