New alternative ingredients and genetic selection are the next game changers in rainbow trout nutrition: a metabolomics appraisal.
Sci Rep
; 13(1): 19634, 2023 11 10.
Article
in En
| MEDLINE
| ID: mdl-37949954
ABSTRACT
The formulation of sustainable fish feeds based on plant ingredients supplemented by alternative ingredients to plant (insect, micro-algae, yeast) and genetic selection of fish for plant-based diets were tested on rainbow trout in two separate experiments. Plant-based diets and corresponding diets supplemented with an ingredient mix insect, micro-algae and yeast in Experiment A, and insect and yeast in Experiment B were compared to commercial-like diets. In experiment A, the mix-supplemented diet was successful in compensating the altered growth performance of fish fed their respective plant-based diet compared to those fed the commercial diet, by restoring feed conversion. In experiment B, the selected line demonstrated improved growth performances of fish fed mix-supplemented and plant-based diets compared to the non-selected line. Metabolomics demonstrated a plasma compositional stability in fish fed mix-supplemented and basal plant-based diets comprising an amino acid accumulation and a glucose depletion, compared to those fed commercial diets. The selected line fed mix-supplemented and commercial diets showed changes in inositol, ethanol and methanol compared to the non-selected line, suggesting an involvement of microbiota. Changes in plasma glycine-betaine content in fish fed the mix-supplemented diet suggest the ability of the selected line to adapt to alternative ingredients.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Oncorhynchus mykiss
Limits:
Animals
Language:
En
Journal:
Sci Rep
Year:
2023
Type:
Article
Affiliation country:
France