Composition and In Vitro Antioxidant Effects of Jellyfish Catostylus tagi from Sado Estuary (SW Portugal)
2009
The jellyfish Catostylus tagi was studied as a food source. C. tagi is an abundant and unexplored resource of the Southwest Portuguese coast. The umbrella and the oral arms were separately assayed. Inorganics, nitrogen, and lipid content were estimated, being identified the major mineral, amino acid and fatty acid (FA) components. The scavenging capacity of C. tagi aqueous extracts for hydroxyl (HO•), superoxide anion (O2 •-) and 1,1-diphenyl-2-picrylhydrazyl (DPPH) radicals were investigated, as well as their ferric ion reducing antioxidant power (FRAP). Both tissues presented acceptable levels of heavy metals for seafood with mercury and lead not being detected. The contents of boron, taurine, and polyunsaturated fatty acids (PUFA), together with the in vitro capacity to quench HO•, have shown that C. tagi is potentially interesting for human consumption as well as for the production of specialty ingredients for the manufacturing of aquaculture feeds.
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