ハマチにおける各種脂質の栄養価〔ハマチの栄養要求に関する研究-2-〕

概要

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The nutritive values of various oils for yellowtail Seriola quinqueradiata were tested in a feeding trial. Five oils; pollack liver, herring, squid liver, sardine, and skip-jack oils, were used in the present study. Prior to the feeding trials, fatty acids of the oils tested were analyzed. The concentration of ω3 highly unsaturated fatty acids (HUFA) with numbers of carbons higher than 20 was more than 20% in squid liver, sardine, and skjp-jack oils, and approximately 12% in pollack liver and herring oils. Five test diets, each containing one oil at a 9% level, were prepared using the provisional basal diet reported previously. The effects of test diets containing squid liver, sardine, or skip-jqck oils, i. e. those rich in HUFA, on the growth of yellowtail were superior to those of the diets containing pollack liver or herring oils. The feed efficiency of the HUFA-rich diets was also higer. These results show that the dietary HUFA level suitable for the growth of yellowtail is com-paratively high. This also suggests that the suitable lipid level for a diet may differ according to the concentration of HUFA in the lipid supplements.
日本水産學會の論文