Assessment of dietary inclusion of crude or hydrolysed Arthrospira platensis biomass in starter diets for gilthead seabream (Sparus aurata)
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AuthorsGalafat, A. (Alba); Vizcaíno, A.J. (Antonio Jesús); Sáez, M.I. (María Isabel); Martínez, T.F. (Tomás Francisco); Arizcun-Arizcun, M. (Marta); Chaves-Pozo, E. (Elena); Alarcón, F.J. (Francisco Javier)
This work evaluates the effects of the dietary inclusion of crude or hydrolysed Arthrospira platensis (Cyanobac- teria) biomass on growth, muscle composition, digestive functionality and immune activities in gilthead seab- ream (Sparus aurata) fry (20.32 mg mean body weight). A 40-day feeding trial was conducted, aimed at assessing four experimental diets that included 5 or 10% (w/w) A. platensis, either crude or hydrolysed, plus a microalgae- free diet as control batch. Overall, none of the dietary treatments caused negative impacts on fish growth, body composition, muscle fatty acid profile, or innate immune response. Thus, the dietary inclusion of both crude and hydrolysed A. platensis reduced significantly the oxidation of muscle lipids, especially when using hydrolysed biomass, regardless of the dietary inclusion level. In relation to digestive enzymes, significantly higher levels of trypsin, chymotrypsin and leucine aminopeptidase activities were measured in fish fed on A. platen ...
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