脂肪酸組成からみた仔稚魚用生物餌料の栄養価

概要

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The relationship between the nutritional quality of various kinds of living feed used in the seed production of fish and their culture media was investigated from the viewpoint of essential fatty acids (EFA) for fish. Tigriopus were found to contain relatively high amounts of 20:5ω3 and 22:6ω (ω3HUFA), the EFA of fish, without regard to its culture media, such as baker's yeast and soy sauce cake, this results suggests a good food value for fish. On the other hand, the content of ω3 HUFA in the lipid of Moina was significantly affected by the culture media. Moina cultured with the yeast were high in the content of monoethylenic fatty acids and low in the content of ω3 HUFA, while those cultured with poultry manure were high in the concentration of 20:5ω3, indicating that the former is inferior to the latter as living feed forfish. Acartia collected in the sea were found to be a superior living feed for marine fish. They contained both 20:5ω3 and 22:6ω3 in a fairly high level, taking 30-60% as the total ω3 HUFA, although a seasonal variation was observed in the level of ω3 HUFA. Daphnia were also found to be a suitable feed for fish, judging from the EFA content.
日本水産學會の論文