養魚飼料における脂質の役割に関する研究-III : ニジマスヘの高度不飽和脂肪酸メチル,リノール酸メチルおよびパルミチン酸メチル投与時の可食部脂肪酸組成への影響

概要

論文の詳細を見る
There were many studies that the lipids of fish were influenced by the fed dietary lipids3)4). This paper reports a study of changes in the fatty acid composition of flesh of rainbow trout (Salmo irideus). In this experiment, the fishes were devided into three groups. The groups were given the diets (Table 1) containing methyl esters of highly unsaturated fatty acids (its main components are eicosapentaenoic acid and docosahexaenoic acid, 78.7% pure), methyl linoleate (83.8% pure) and methyl palmitate (93.7% pure) at 10%, respectively, for ten weeks (earlier period), then ester of each groups diet was changed to other ester, as shown in Table 2, breeding experiment was continued for ten more weeks (later period). On both periods, approximate 400 grams of fish in each group were caught at zero, four, eight and ten weeks. Lipids of flesh, liver and viscera were extracted by ethyl ether and oil contents were determined (Table 3). The results obtained on this experiment could be summerized as follows; 1) Each group grew on health, oil content in flesh was approximately the same (Fig. 1). 2) When the fish were given methyl esters of highly unsaturated fatty acids or methyl linoleate, the corresponding fatty acids in flesh lipids increased rapidly. However, on group fed methyl palmitate, the acid in flesh lipids increased slowly (Fig. 2). 3) When the fish, which were fed methyl esters of highly unsaturated fatty acids and distributed richly such fatty acids in flesh lipids, were given methyl palmitate, the highly unsaturated fatty acids in flesh lipids decreaeed rapidly. 4) As fish which stored a large amount of linoleate in flesh lipids, were given methyl esters of highly unsaturated fatty acids, both decrease of linoleate and increase of the highly unsaturated fatty acids in flesh lipids progressed slowly (Fig. 2). 5) The content of palmitic acid in flesh lipids of the fish which were not given methyl palmitate at both periods was more than 15%. The lowest level of linoleic acid content in flesh lipids of the fish which were not given methyl linoleate on all period was 9%. The level of the highly unsaturated fatty acids in flesh lipids of the fish that were not given methyl esters of the highly unsaturated fatty acids at both periods, was maintained 5% (Fig. 4).

養魚飼料における脂質の役割に関する研究-III : ニジマスヘの高度不飽和脂肪酸メチル,リノール酸メチルおよびパルミチン酸メチル投与時の可食部脂肪酸組成への影響

スポンサーリンク

概要

著者

関連論文

スポンサーリンク