Abstract
Currently valorization of fish discards by-products is becoming fundamental for the sustainable management of fisheries and seafood transforming industries. Thus, we have studied the changes in the production and chemical properties of fish protein hydrolysates (FPH) and oils from by-products (heads (He) and skins + bones (SB)) of gurnard (Trigla spp.) captured at different seasons. Hydrolyses were performed by Alcalase (2.5 mL/kg of by-product) at pH 8.60, 60.6 °C, 200 rpm, for 3 h. Seasonality effect was not significant in the majority of FPH properties, obtaining high digestion yields and excellent amino acid contents (more than 43% of essential amino acids per total amino acids in He). However, the maximum degree of hydrolysis for He were higher (24–26.5%) than observed for SB (19–23.6%). In the case of oil, concomitantly recovered to the production of hydrolysates, the yield of recovery was largest in SB landing on autumn (89 mL/kg SB) and winter (67 mL/kg SB), and the best content in ω-3 fatty acids was also found in autumn (257 g/kg oil). In general, FPH and oil from gurnard residues were excellent in productive, compositional and nutritional terms, indicating their valuable interest as potential food and nutraceutical ingredient.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
