Discarded species in the west Mediterranean sea as sources of omega-3 PUFA

Pedro Jesús García Moreno, Raul Perez-Galvez, Rocio Morales-Medina, Antonio Guadix, Emilia M. Guadix

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Five discarded fish species in the Alboran Sea, namely axillary seabream (Pagellus acarne), small-spotted catshark (Scyliorhinus canicula), sardine (Sardina pilchardus), horse mackerel (Trachurus mediterraneus), and bogue (Boops boops) were evaluated as novel sources for the production of omega-3 polyunsaturated fatty acids (PUFAs). The lipid content of the five species varied significantly within the different seasons, being maximum in spring for axillary seabream, small-spotted catshark, and bogue (5.1, 2.7, 2.5%, respectively) and in summer for sardine and horse mackerel (13.6 and 6.2%, respectively). Sardine and horse mackerel presented also the maximum amount of eicosapentaenoic acid (EPA)+docosohexaenoic acid (DHA), 3000 and 1300mg/100g fish, respectively. Their oils exhibited a composition of EPA+DHA higher than 23% and they were mainly composed by triacylglycerols. Axillary seabream, small-spotted catshark, and bogue presented a lower amount of EPA+DHA, 960, 650, and 157mg/100g fish, respectively, but their oils also exhibited a composition of EPA+DHA higher than 20%. Particularly important was the composition of DHA, 23%, of the oil extracted from small-spotted catshark. Therefore, the five discarded species studied were found to be valuable raw material for the production of fish oil presenting a high content in EPA and DHA. Practical applications: This work is in line with ongoing EU regulations avoiding fish discards. This has boosted research on the potential of these raw materials for the production of high added-value products such as omega-3 PUFAs, which are experiencing a growing commercial demand. This study provides a complete characterization of five discarded species in the Alboran Sea, with special focus on the availability of their omega-3 content throughout the year. Despite their different lipid content, all the species were good sources for the production of omega-3. The oils extracted from these species presented a maximum composition of EPA+DHA higher than 20%. Interestingly, small-spotted catshark's oil was relatively rich in DHA (up to 23%), which makes this oil an excellent functional ingredient for brain and children's health applications. The results obtained provide valuable information for food scientists interested in the production of omega-3 PUFAs from traditional and alternative fish species.
Original languageEnglish
JournalEuropean Journal of Lipid Science and Technology
Volume115
Issue number9
Pages (from-to)982-989
Number of pages8
ISSN1438-7697
DOIs
Publication statusPublished - 2013
Externally publishedYes

Keywords

  • Food Science
  • Chemistry (all)
  • Biotechnology
  • Industrial and Manufacturing Engineering
  • Fish discards
  • Fish oil
  • Mediterranean sea
  • Omega-3
  • Proximate composition
  • FOOD
  • NUTRITION
  • POLYUNSATURATED FATTY-ACIDS
  • MACKEREL TRACHURUS-TRACHURUS
  • SEASONAL-CHANGES
  • TRAWL FISHERY
  • OMEGA-3-FATTY-ACIDS
  • CHOLESTEROL
  • EXTRACTION
  • PROXIMATE
  • FOODS
  • OIL
  • Alboran Sea Mediterranean Sea, North Atlantic Atlantic Ocean
  • axillary seabream seafood
  • bogue seafood
  • horse mackerel seafood
  • sardine seafood
  • seasonal influence
  • small-spotted catshark seafood
  • Pisces Vertebrata Chordata Animalia (Animals, Chordates, Fish, Nonhuman Vertebrates, Vertebrates) - Chondrichthyes [85202] Scyliorhinus canicula species small-spotted catshark common
  • Pisces Vertebrata Chordata Animalia (Animals, Chordates, Fish, Nonhuman Vertebrates, Vertebrates) - Osteichthyes [85206] Sardina pilchardus species sardine common Pagellus acarne species axillary seabream common Trachurus mediterraneus species horse mackerel common Boops boops species bogue common
  • docosahexaenoic acid 32839-18-2
  • eicosapentaenoic acid 32839-30-8
  • fish oil
  • lipids
  • omega-3 polyunsaturated fatty acid omega-3 PUFA dietary supplement
  • triacylglycerol
  • 10066, Biochemistry studies - Lipids
  • 13502, Food technology - General and methods
  • 13522, Food technology - Fish and other marine and freshwater products
  • Foods
  • Omega‐3

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