FN Archimer Export Format PT J TI Effects of different dietary levels of fish protein hydrolysates on growth, digestive enzymes, gut microbiota, and resistance to Vibrio anguillarum in European sea bass (Dicentrarchus labrax) larvae BT AF KOTZAMANIS, Y. P. GISBERT, E. GATESOUPE, Joel ZAMBONINO-INFANTE, Jose-Luis CAHU, Chantal AS 1:1;2:2;3:3,4;4:3;5:3; FF 1:;2:;3:;4:PDG-DOP-DCB-PFOM-ARN;5:PDG-DOP-DCB-PFOM; C1 Hellen Ctr Marine Res, Inst Aquaculture, Athens 16610, Greece. IRTA, Ctr Aquacultura, Tarragona 43450, Spain. IFREMER, INRA, UMR Nutr Aquaculture & Genom, F-29280 Plouzane, France. C2 HELLEN CTR MARINE RES, GREECE IRTA, SPAIN IFREMER, FRANCE INRA, FRANCE SI BREST SE PDG-DOP-DCB-PFOM-ARN PDG-DOP-DCB-PFOM IN WOS Ifremer jusqu'en 2018 copubli-france copubli-p187 copubli-europe IF 1.863 TC 144 UR https://archimer.ifremer.fr/doc/2006/publication-2145.pdf LA English DT Article DE ;Pseudoalteromonas;Bacillus;Vibrio, Marinomonas;Bacterial challenge microbiota;Fish hydrolysate;Digestive enzymes;Development;Fish larvae AB Two Fish Protein Hydrolysates (FPH) were incorporated into four diets prepared for start-feeding sea bass larvae, at two different levels (10% and 19% of total ingredients): a commercial FPH, CPSP, in which the molecular weight of the main fraction of soluble peptides (51%) was between 500-2500 Da, and an experimental FPH obtained by acidic silage of sardine offal, SH, with a main portion of soluble peptides (54%) ranging from 200 to 500 Da. The diet with 10% of the commercial FPH gave the best results in terms of growth, survival and intestinal development, as evaluated by the early activity of digestive enzymes in the brush border membrane (alkaline phosphatase and aminopeptidase N). This was related to the low level of Vibrio spp. counted in the larvae of group C10. The high dose of FPH, especially in the experimental preparation rich in short peptides, seemed to favour the dominance of Vibrio sp. TYH3, which behaved opportunistically. The effect of the experimental FPH was ambiguous, since early larvae challenged with Vibrio anguillarum were more resistant to the pathogen, especially at high FPH dose (group S19). This might be due either to direct antagonism between V. anguillarum and Vibrio sp. TYH3, or to the stimulation of the immune response in the larvae. These results indicate that different molecular weight fractions and concentrations of feed-soluble peptides may affect the growth performance and immunological status of sea bass larvae. Consequently, a low dose of commercial FPH seems advisable, both for larval development and for the bacterial environment, although further research is required to determine and characterize peptide fractions that may have a beneficial effect on growth and immune response, and to determine their optimal inclusion levels in diets for sea bass larvae. PY 2007 PD JUN SO Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology SN 1095-6433 PU Elsevier VL 147 IS 1 UT 000245995700025 BP 205 EP 214 DI 10.1016/j.cbpa.2006.12.037 ID 2145 ER EF