Different Diets Based on Yellow Mealworm (Tenebrio molitor)—Part B: Modification of the Intestinal Inflammatory Response and the Microbiota Composition of Rainbow Trout (Oncorhynchus mykiss)
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MDPI
Materia
Aquaculture Rainbow trout Fishmeal replacement Yellow mealworm Insect meal Nutrition Protein digestibility Immunology Histomorphology Microbiota
Fecha
2023-05-25Referencia bibliográfica
Melenchón, F.; Larrán, A.M.; Hernández, M.; Abad, D.; Morales, A.E.; Pula, H.J.; Fabrikov, D.; Sánchez-Muros, M.J.; Galafat, A.; Alarcón, F.J.; et al. Different Diets Based on Yellow Mealworm (Tenebrio molitor)—Part B: Modification of the Intestinal Inflammatory Response and the Microbiota Composition of Rainbow Trout (Oncorhynchus mykiss). Fishes 2023, 8, 284. [https:// doi.org/10.3390/fishes8060284]
Patrocinador
INIA (Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria); Co-funded by FEDER funds (Ref. RTA 2015-00021-C03).; AEI (Agencia Estatal de Investigación) awarded through the financial help of reference BES2017-080567; FSE funds; AquaTech4Feed (grant # PCI2020-112204); MCIN/AEI/10.13039/501100011033; EU “NextGenerationEU”/PRTR within the ERA-NET BioBlue COFUNDResumen
With the purpose of improving aquaculture sustainability, the search for protein alternatives
to fishmeal makes it necessary to test different variables and the possible repercussions of new
ingredients. The use of insect meal as a protein source for aquaculture is well described, but the
complex composition of insect meals (fat and other components) can affect the physiology of fish. For
this reason, as a part of a bigger study, the aim of the current manuscript was to test diets based on
three different presentations of insect meal coming from yellow mealworm (Tenebrio molitor): full fat,
partially defatted, and supplemented with a long chain omega–3-enriched oil, and to evaluate their
effects on protein digestibility, biometric indices, immunological system and gut health (intestinal
histomorphology and microbiota) of rainbow trout (Oncorhynchus mykiss). Digestibility of the protein
and body indices showed a minor but consistent trend. The non-specific immunological system
did not show changes, but the histology of the intestine showed signs that insect meals could be
softening a mild inflammatory response. The gut microbiota suffered several changes, which could
be associated with the different amino acid and fatty acid compositions of the diets