Australian fish—An excellent source of both arachidonic acid and ω-3 polyunsaturated fatty acids |
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Authors: | R A Gibson |
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Affiliation: | (1) Paediatric Department, Flinders Medical Centre, 5042 Bedford Park, S.A., Australia |
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Abstract: | The fatty acid methyl esters obtained by the esterification of total lipids extracted from 24 species of fin fish and 4 species
of invertebrates caught in the rivers and coastal waters of southern Australia were analyzed by gas chromatography. The lipids
of most species contained significant levels of arachidonic acid (0.7–15.8%) as well as the more common marine polyunsaturate,
eicosapentaenoic acid (0.7–15.9%). The major ω6 fatty acid present in most species was 20∶4; however, other fatty acids of
this series, including 18∶2, 22∶4 and 22∶5, were present. The level of total ω6 fatty acids ranged from 3.9 to 22.3% of the
total lipid. In general, the level of total ω3 polyunsaturates was higher than the total ω6 fatty acids with levels of ω3
fatty acids ranging from 9.6 to 48.2%. Only 2 fish (barramundi and gurnard perch) had ω6/ω3 ratios greater than 1.0. Most
of the Australian species examined contained low levels of fat (0.5–7.8% of fresh weight). Two species examined, callop (freshwater)
and blue groper (marine) contained sufficient quantities of both fat (7.7 and 7.8%) and arachidonic acid (4.8 and 9.3%) to
warrant consideration for commercial exploitation. |
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