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Lipid characterization and properties of protein hydrolysates obtained from discarded Mediterranean fish species


, : Lipid characterization and properties of protein hydrolysates obtained from discarded Mediterranean fish species. Journal of the Science of Food and Agriculture 93(15): 3777-3784

Discards are an important fraction of the by-products produced by the fishing industry. As consequence of their low commercial acceptance, it is required to provide an added value to these underutilized materials. In this study, it was carried out the characterization of the lipid fraction of three fish discarded species in the west Mediterranean Sea, sardine (Sardine pilchardus), mackerel (Scomber colias) and horse mackerel (Trachurus trachurus), as well as the evaluation of both angiotensin I-converting enzyme (ACE)-inhibitory and antioxidative activities of their protein hydrolysates. The processing of these biomaterials led to oils with a high content of Omega-3 polyunsaturated fatty acids (PUFAs), ranging from 220.5 g kg-1 for horse mackerel to 306.0 g kg-1 for sardine. Regarding the protein fraction, most of the hydrolysates presented ACE inhibition values higher than 60%, which corresponds to IC50 values varying from 345 g protein mL-1 for mackerel to 400 g protein mL-1 for sardine. Moreover, most of the hydrolysates exhibited an acceptable antioxidative activity, 35-45% of 1,1-diphenyl-2-picryl-hydrazyl (DPPH) inhibition. This study suggests that the three discarded species evaluated are valuable raw material for the production of bioactive ingredients such as Omega-3 PUFAs and protein hydrolysates exhibiting antihypertensive and antioxidant activities.

US$19.90

PMID: 23765636

DOI: 10.1002/jsfa.6266


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