Valorisation of sea urchin (Paracentrotus lividus) gonads through canning

Fresh sea urchin (Paracentrotus lividus) gonads are a delicacy with short seasonal availability, very often heterogeneous in size and intrinsic characteristics. This study aimed to valorise this resource through the preparation of canned products (with/without Porphyra spp.) and evaluate their physicochemical and sensory quality (3–12 months). Canning contributed to a decrease in protein, K* and most carotenoids contents; and a concentration of lipids, ash, Na* and Se* levels. A simulated 12-month ageing led to decrease the protein and β-carotene contents; and the Na and lutein levels concentration. The macroalgae addition resulted in an orange, darker and less soft product, with higher carbohydrates, Na, Se and carotenoids contents. A 25 g-dose contributes to significant daily intakes of protein (8–9%), EPA+DHA* (47–53%), I* (35–62%) and Se (30–47%). The products were commercially stable/sterile and had good sensory acceptance. Overall, canning constitutes a strategy to provide a nutritionally balanced product available all year-round.