Selection of carbohydrate-active probiotics from the gut of carnivorous fish fed plant-based diets

• Tipo: Artigo em Revista Científica Internacional
• Data: 2019

Autores

Claudia Alexandra dos Reis Serra (Autor) FCUP; Almeida, EM (Autor) Outra; Guerreiro, I (Autor) Outra; Santos, R (Autor) Outra; Merrifield, DL (Autor) Outra; Fernando Tavares (Autor) FCUP; Oliva Teles, A (Autor) FCUP; Enes, P (Autor) FCUP

Revista

Título: Scientific Reports

Vol. 9 Nº 3413

Página Final: 6384

ISSN: 2045-2322

Editora: Springer Nature

Indexação

ISI Web of Knowledge - 44 Citações

Scopus - 52 Citações

Outras Informações

ID Authenticus: P-00Q-FX1

DOI: 10.1038/s41598-019-42716-7

Abstract (EN): The gastrointestinal microbiota plays a critical role on host health and metabolism. This is particularly important in teleost nutrition, because fish do not possess some of the necessary enzymes to cope with the dietary challenges of aquaculture production. A main difficulty within fish nutrition is its dependence on fish meal, an unsustainable commodity and a source of organic pollutants. The most obvious sustainable alternatives to fish meal are plant feedstuffs, but their nutritive value is limited by the presence of high levels of non-starch polysaccharides (NSP), which are not metabolized by fish. The composition offish-gut microbial communities have been demonstrated to adapt when the host is fed different ingredients. Thus, we hypothesized that a selective pressure of plant-based diets on fish gut microbiota, could be a beneficial strategy for an enrichment of bacteria with a secretome able to mobilize dietary NSP. By targeting bacterial sporulating isolates with diverse carbohydrase activities from the gut of European sea bass, we have obtained isolates with high probiotic potential. By inferring the adaptive fitness to the fish gut and the amenability to industrial processing, we identified the best two candidates to become industrially valuable probiotics. This potential was confirmed in vivo, since one of the select isolates lead to a better growth and feed utilization efficiency in fish fed probiotic-supplemented plant-based diets, thus contributing for sustainable and more cost-effective aquaculture practices.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 15