Resumen

CONCEPCION-BRINDIS, A et al. Evaluation of an antioxidant diet for tilapia Oreochromis niloticus with mango and roselle by-products inclusion. Biotecnia [online]. 2022, vol.24, n.2, pp.69-76.  Epub 19-Mayo-2023. ISSN 1665-1456.  https://doi.org/10.18633/biotecnia.v24i2.1583.

The aquaculture industry experiences a growing interest in implementing antioxidants from natural origin in diets because the synthetic ones are associated to carcinogenic and teratogenic effects. Additionally, synthetic antioxidants have been included in such diets to prevent lipid oxidation during storage and distribution, without a perspective of the organisms health, since they require micronutrients, such as bioactive compounds, mainly antioxidants. Thus, mango and roselle by-products (rich in bioactive compounds) were included in an aquaculture diet, assessed on its antioxidant properties by distincts technics: antiradical activity 2, 2-diphenyl-1-pricrylhydrazyl (DPPH●), ferric reducing antioxidant power (FRAP) and phenolic compounds concentration. In addition, with this feed, tilapia Oreochromis niloticus fingerlings-juveniles were fed and compared with a reference and commercial diets respect their performance in a laboratory scale, according to the main parameters evaluated in aquaculture. With respect to the results obtained by the 3 techniques used, antioxidant properties of the diet are increased with the inclusion of the novel inputs. No differences were found between supplied feeds for biological parameters assessed in the tilapia, so no negative effect was considered during feeding with the novel functional diet. Therefore, the potential use of the evaluated by-products in commercial diets is inferred and an assessment of the functional feed during the next rearing stages of the species under commercial rearing conditions is suggested.

Palabras llave : mango; roselle; by-product; tilapia diet.

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