Effect of Prey Fish Lipids on the Docosahexaenoic Acid Content of Total Fatty Acids in the Lipid of Thunnus albacares Yellowfin Tuna
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概要
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The fatty acid composition of the lipid of yellowfin tuna (Thunnus albacares) caught in two different localities, Philippine Sea (a tropical zone) and the Pacific coast area of Japan (a temperate zone) is described. The total lipids of various organs (dorsal ordinary muscle, ventral ordinary muscle, dark muscle, liver, heart, pyloric cecum, and orbital region) and of the stomach contents were extracted, and the fatty acid comosition was analyzed by gas-liquid chromatography (GLC). Docosahexaenoic acid (DHA; 22:6n-3) was the major unsaturated fatty acid in the lipid of all organs in the specimens examined from both localities, the mean DHA content accounting for more than 25% (mean±S.D. of 26.9±5.7%) of the total fatty acids. This value is markedly different from the fatty acid profile of other fish species, because, in general, the fatty acid composition of other species is variable and the DHA content is less than 20% of total fatty acids. Although the mean DHA content of the total fatty acids in the lipid of yellowfin tuna caught in the tropical and temperate zones was markedly higher than that in other fish species, there was a small difference between that in the northern samples (temperate waters, 30.5±6.1%) and the southern samples (tropical waters, 25.9±5.2% ). It is suggested that this difference may be due to environmental effects, e.g., the fatty acid composition of the lipids of prey organisms, because there is also a small difference between the mean DHA content of northern prey fish (22.7±6.1%) and that of southern prey fish (19.2±4.0%).
- 社団法人日本農芸化学会の論文
- 1996-06-23
著者
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ISHIHARA Kenji
Laboratory of Nutritional Physiochemistry, Department of Applied Biological Science, Tokyo Noko Univ
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SAITO HIROAKI
Tohoku National Fisheries Research Institute
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Saito H
Marine Biochemistry Division National Research Institute Of Fisheries Science
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Saito Hiroaki
Laboratory of Lipid Chemistry, National Research Institute of Fisheries Science, Ministry of Agricul
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SAITO Hiroaki
Tokai Regional Fisheries Research Laboratory, Fisheries Agency
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Murase Teruaki
Hagoromo Foods Corporation
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Ishihara K
Department Of Food And Nutrition School Of Life Studies Sugiyama Jogakuen University
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Saito H
National Research Institute Of Fisheries Science Fisheries Research Agency
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Saito Hiroaki
Laboratory Of Lipid Chemistry
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Saito Hiroaki
Laboratory Of Lipid Chemistry National Research Institute Of Fisheries Science Ministry Of Agricultu
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Saito Hiroaki
Laboratory Of Lipid Chemistry National Research Institute Of Fisheries Science Ministry Of Agricultu
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Ishihara Kenji
Laboratory Of Lipid Chemistry National Research Institute Of Fisheries Science Ministry Of Agricultu
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Saito Hiroaki
Fisheries Oceanography Tohoku National Fisheries Research Institute
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Saito Hiroaki
Laboratory Of Lipid Chemistry National Research Institute Of Fisheries Science Ministry Of Agricultu
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