This review addresses the dietary supplements, synbioticsand probiotics in combination with plant products oryeast/b-glucans in aquaculture. The potential applicationsof synbiotics have a relatively short history in aquacul-ture, but have generated interest because of numerousbeneﬁts reported in endothermic animals. Since the ﬁrststudy was published by (Aquaculture Science in 2009) theconcept has been used in aquaculture to reveal effects ongrowth performance, gut microbiota, gut histology,immune parameters, haematological and biochemicalparameters as well as increased disease resistance. How-ever, a limited number of probiotic bacteria (mainlyBacillus and Enterococcus) and prebiotics (mannanoligosaccharides, fructooligosaccharides, short-chain fruc-tooligosaccharides, galactooligosaccharides, arabinoxylan–oligosaccharides, isomaltooligosaccharide, chitosan oligosac-charide and inulin) have been used. Additionally, somestudies have used plant products or yeast/b-glucans in com-bination with probiotics, and these studies suggested thatthese dietary supplements promote growth performance andboost some immune parameters. The present review identi-ﬁes evaluations of gut microbiota and gut morphology, andmucosal immune response as signiﬁcant gaps in existingknowledge and suggests issues that merit further investiga-tions to conclude the potential of dietary supplements inaquaculture.
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