Valuable Nutrients from Ulva rigida: Modulation by Seasonal and Cultivation Factors

Ulva macroalgae species are recognized to be an underexploited source of key nutrients, including proteins, fibers and minerals. The present work evaluated the nutritional value protein, ash, mineral composition, fat, fatty acid profile dietary fiber green rigida produced in open land-based integrated multi-trophic aquaculture (IMTA) system, over four seasons. Overall, protein fat content farmed algae ranged between 7.6 25.8% DW 0.2 1.3% DW, respectively, reaching highest levels during autumn/winter In turn, total ashes showed a contrary seasonal tendency, maximum spring (40.9–58.3% 25.5–38.8% respectively). Notably, latter were particularly characterized by their richness potassium, magnesium iron, sodium/potassium ratio bellow 1.7. Variable cultivation conditions stocking density (Sd) flow rate (Fr) also tested, allowing confirm that manipulation IMTA system may help improve this macroalga boost its market through use as functional food ingredient.