Seasonal variation in docosahexaenoic acid content in horse mackerel caught in the East China Sea |
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| Authors: | Kazufumi OSAKO Akira YAMAGUCHI Takao KUROKAWA Koichi KUWAHARA Hiroaki SAITO AND Yukinori NOZAKI |
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| Institution: | Nagasaki Prefectural Institute of Fisheries, Taira, Nagasaki 851-2213, ;National Research Institute of Fisheries Science, Yokohama, Kanagawa 236-8648 and ;Faculty of Fisheries, Nagasaki University, Nagasaki, Nagasaki 852-8521, Japan |
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| Abstract: | ABSTRACT: The fatty acid composition in horse mackerel caught off Nagasaki, off Tsushima Island, and in the middle of the East China Sea was investigated. The ratios of monoenoic and polyenoic acids to the total fatty acids in the Nagasaki and bull trawl catch specimens had a negative correlation. The docosahexaenoic acid (DHA; 22:6n-3) ratios of total fatty acids in summer-caught specimens were lower than those in winter-caught specimens, and this tendency was significantly clearer in smaller-sized fish, while DHA levels in tissues varied little throughout the year. Consistently high levels of DHA were found in various fishing areas, which suggests that horse mackerel offers a stable source of DHA. |
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| Keywords: | DHA East China Sea fatty acid composition horse mackerel monoenoic fatty acids polyenoic fatty acids saturated fatty acids |
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