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Título : Apparent digestibility coefficients of brewer's by-products used in feeds for rainbow trout (Oncorhynchus mykiss) and gilthead seabream (Sparus aurata)
Autor : Nazzaro, J.; San Martin, David; Perez-Vendrell, A. M.; Padrell, L.; Iñarra, Bruno; Orive, M. Estevez, A.
Resumen : A trial was conducted to test the effect of partial replacement of fishmeal by two brewery industry byproducts, yeast and spent grain, included in isoproteic (41\% CP) and isolipidic (22\% CL) diets for gilthead sea bream (Sparus aurata) and rainbow trout (Oncorhyncus mykiss), having in mind the availability of these byproducts. A first step before an ingredient is included in a commercial feed is to evaluate the nutritional quality of these raw materials by measuring their digestibility. Thus, the apparent digestibility coefficients of the diets and ingredients were determined after a 30 days feeding trial and faecal collection. Apparent digestibility coefficients of these by products in the case of rainbow trout varied between 75 and 88\% whereas for gilthead seabream was between 71 and 88\%. According to the results obtained, the inclusion of 20-30\% of brewers' spent yeast and spent grain in the feed for carnivorous fish either from fresh (rainbow trout) or marine (gilthead seabream) gave similar results to a feed with fish meal as the main protein source and show a good protein, lipid and amino acid digestibility. Taking into account that these by-products are produced in large quantities in Europe, they can be a potential source of protein to reduce the use of plant proteins or fish/animal byproducts (trimmings) and increase the sustainability of both sectors, brewery industry and aquaculture.
Palabras clave : SPENT GRAIN; PRACTICAL DIETS; PLANT-PRODUCTS; SOYBEAN-MEAL; FISH-MEAL; YEAST; REPLACEMENT; AQUACULTURE; BARLEY; GROWTH
Fecha de publicación : 2021
Editorial : ELSEVIER
Tipo de documento: Article
Idioma: 
DOI: 10.1016/j.aquaculture.2020.735796
URI : http://dspace.azti.es/handle/24689/1290
ISSN : 0044-8486
E-ISSN: 1873-5622
Patrocinador: LIFE European Environment Programme, the EU's financial instrument supporting environmental, nature conservation and climate action projects throughout the EU [LIFE16ENV/ES/000160]
Aparece en las tipos de publicación: Artículos científicos



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