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Characteristics of the lipid and fatty acid compositions of the Humboldt squid, Dosidicus gigas : The trophic relationship between the squid and its prey
Author(s) -
Saito Hiroaki,
Sakai Mitsuo,
Wakabayashi Toshie
Publication year - 2014
Publication title -
european journal of lipid science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.614
H-Index - 94
eISSN - 1438-9312
pISSN - 1438-7697
DOI - 10.1002/ejlt.201300230
Subject(s) - squid , polyunsaturated fatty acid , biology , docosahexaenoic acid , phosphatidylcholine , food science , arachidonic acid , phosphatidylethanolamine , fatty acid , cuttlefish , biochemistry , fishery , zoology , phospholipid , membrane , enzyme
The lipids and fatty acids of the Humboldt squid ( Dosidicus gigas ) were examined to assess its lipid physiology and the relationship between the squid and its prey. Similar to highly migratory fishes, D. gigas has high levels of 22:6 n‐ 3 (DHA) in its TAGs (21.9–29.0% for mantles and 21.8–23.9% for arms), different from stomach content lipids (1.9–16.5%), which fluctuated or were at very low levels in some samples. The major PUFA in the tissue (mantle, arm, integument, and gonad) phospholipids were 20:5 n ‐3 (icosapentaenoic acid, EPA), and DHA. Markedly high levels of both EPA and DHA with noticeable levels of 20:4 n ‐6 (arachidonic acid; ARA) were observed in phosphatidylethanolamine (17.2–28.8% for EPA, 8.8–22.6% for DHA, and 2.4–11.8% for ARA), while DHA was found as a major component in phosphatidylcholine (30.6–47.8% for DHA). These findings imply a concentration of these PUFA from the storage lipids in the tissues of D. gigas , and that the squid actively concentrates EPA and in particular DHA as a top predator, similar to highly migratory fishes. D. gigas is a healthful marine food containing high levels of EPA and DHA with noticeable levels of ARA.