Spawning and season affect lipid content and fatty acid composition of ovary and liver in Japanese catfish (Silurus asotus)

Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology
Nobuya ShiraiS Wada

Abstract

The influences of spawning and season on lipid content, lipid classes, and fatty acid composition were assessed in ovary and liver of wild and cultured Japanese catfish (Silurus asotus). The lipid content (7.3+/-1.6 g/100 g wet wt.) of ovary from wild catfish at spawning was higher than that at post-spawn. However, no influence of spawning on the lipid content of liver was observed. Docosahexaenoic acid [DHA, C22:6(n-3)] in ovary lipids was 12.3+/-0.5% of total fatty acids. The percentage of n-7 monounsaturated fatty acids in triacylglycerol from the ovary and liver in the spawning season was high. Percentages of C22:6(n-3) in phosphatidylcholine and phosphatidylethanolamine from ovary were higher during spawning than after spawning. No significant differences were observed in the lipid content of ovary and liver from cultured catfish between seasons (summer vs. winter). Content of arachidonic acid (C20:4n-6) in ovary and liver from cultured catfish was higher in summer than in winter. There were differences in lipid classes of ovary and liver by spawning and season. These results suggest that the lipid metabolism in Japanese catfish is greatly influenced by spawning and season.

Citations

Feb 6, 2003·Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology·Chamila JayasingheShun Wada
Jul 19, 2008·Journal of Nutritional Science and Vitaminology·Tomoyuki HiguchiHiramitsu Suzuki
May 17, 2006·Journal of Agricultural and Food Chemistry·Tomoyuki HiguchiHiramitsu Suzuki

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