Nutritional indexes, fatty acids profile, and regiodistribution of oil extracted from four discarded species of the Alboran Sea: Seasonal effects

Rocío Morales-Medina, Pedro Jesús García Moreno, Raúl Pérez-Gálvez, María M. Muñío, Antonio Guadix, Emilia M. Guadix

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Abstract

The new EU fisheries regulations state that all catches from pelagic fisheries must be landed from the January 1, 2015 on. Consequently, the development of new techniques for the up-grading of these discards is required. The aim of this work was to study the variations of the lipid profile and nutritional value of the oil extracted from four discarded species: axillary seabream (Pagellus acarne), sardine (Sardina pilchardus), horse mackerel (Trachurus mediterraneus), and blue whiting (Micromesistius poutassou). To that end, the proximate composition, the lipid profile, the regiospecific distribution of fatty acids within the glycerol backbone, the nutritional parameters (thrombogenic and atherogenicity indexes and hypocholesterolemic/hypercholesterolemic ratio), and the peroxidability index were determined in each season. All species presented polyunsaturated fatty acids (PUFA) as the major fraction in both the global and the sn-2 profile. DHA presented highly regiospecifity to position sn-2 whereas the tendency of EPA was to occupy sn-1(3) positions. The relative concentration of PUFA occupying sn-2 position varied from 30 to 60% (molar basis).
Original languageEnglish
JournalEuropean Journal of Lipid Science and Technology
Volume118
Number of pages7
ISSN1438-7697
DOIs
Publication statusPublished - 2016
Externally publishedYes

Keywords

  • Food Science
  • Chemistry (all)
  • Biotechnology
  • Industrial and Manufacturing Engineering
  • Extracted oil
  • Fatty acid profile
  • Lipid
  • Pelagic fish
  • PUFA

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