養殖マダイ組織の2-チオバルビツール酸値と多不飽和脂肪酸濃度との関係

抄録

In order to evaluate the factors responsible for accelerating lipid peroxidation in cultured fish tissues, the relationship of the polyunsaturated fatty acids (PUFA) concentrations of the ordinary muscle and liver from 3-year-old cultured red sea breams Pagrus major was investigated from July, 1986 through January, 1987. A comparison of the cultured fish and wild red sea breams was included. The cultured fish ordinary muscle gave relatively high TBA values from July through September and low TBA values from October to January. Their PUFA concentrations (such as 22:6ω3, 20:5ω3, 20:4ω6) and peroxidizability indices didn't vary greatly from July through January, except in August. On the other hand, the PUFA concentrations and peroxidizability indices of the liver from the cultured fish had relatively high values from November through January. However, their liver TBA values were quite low from November through January. Moreover, although the ordinary muscle and liver of the wild fish gave a higher PUFA concentration and peroxidizability index as compared with those of the cultured fish, the wild fish TBA values remained lower. Consequently, the re-sults obtained in the present study suggest that the accelerating lipid peroxidation in the ordinary muscle and liver from cultured red sea breams does not always depend upon their PUFA concentrations.