Assessment of dietary inclusion of crude or hydrolysed Arthrospira platensis biomass in starter diets for gilthead seabream (Sparus aurata).
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Galafat, Alba; Vizcaíno, Antonio Jesús; Sáez, María Isabel; Martínez, Tomás Francisco; Arizcun, Marta; [et al.]Date
2022-09-20Abstract
This work evaluates the effects of the dietary inclusion of crude or hydrolysed Arthrospira
platensis (Cyanobacteria) biomass on growth, muscle composition, digestive
functionality and immune activities in gilthead seabream (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. ...