Open AccessThe effects of dietary marine protein hydrolysates on the development of sea bass larvae, D icentrarchus labrax , and associated microbiota
Author(s) -
Delcroix J.,
Gatesoupe F.J.,
Desbruyères E.,
Huelvan C.,
Le Delliou H.,
Le Gall M.M.,
Quazuguel P.,
Mazurais D.,
ZamboninoInfante J.L.
Publication year - 2015
Publication title -
aquaculture nutrition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.941
H-Index - 79
eISSN - 1365-2095
pISSN - 1353-5773
DOI - 10.1111/anu.12139
Subject(s) - dicentrarchus , biology , sea bass , hydrolysate , food science , larva , fish meal , biochemistry , fishery , ecology , fish <actinopterygii> , hydrolysis
Protein hydrolysate is an essential component of dry starter diets for fish larvae, as promoting healthy development. Peptides are also suitable substrates for many intestinal microbes. Five experimental diets were compared to a control diet ( CONT ) supplemented with a commercial fish protein hydrolysate. Each diet contained one marine protein hydrolysate, which differed by the proportion of di‐ and tri‐peptides, and by raw materials. Two diets ( HYD 4 and HYD 5) stimulated larval growth compared with CONT . Two other diets ( HYD 1 and HYD 2) yielded inferior growth. HYD 1 was detrimental for survival, which was associated with an up‐regulation of genes involved in inflammation and antioxidative responses, while the gene coding for osteocalcin was down‐regulated in this group. The relative activity of enzymes in the brush border membrane of enterocytes was significantly stimulated with diets HYD 3 and HYD 4. Gut microbiota were influenced by the diet, but the bacterial community profiles observed with HYD 3 and HYD 4 were the only ones that were not significantly dissimilar. Groups HYD 1 and HYD 2 showed the most dissimilar microbiota. It was concluded that the nature of the marine protein hydrolysate is important for larval development and health, but a high proportion of small peptides is not a sufficient criterion to assess dietary value.