開放系循環水槽において養殖されたトラフグ肝臓の無毒確認とその脂質中の機能性成分

概要

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It has recently been confirmed that the food chain has been consistently implicated as the principal means of tetrodotoxin (TTX) intoxication in many TTX bearing organisms inclusive of pufferfish. Accordingly, in net cage or land culture with non-toxic diet by preventing the invasion of TTX bearing organisms are non-toxic pufferfish produced on large scale. In this study, taking utilization of non-toxic liver of the pufferfish of the above as a delicious and safe material into account, non-toxicity was at first confirmed by culturing them with the non-toxic pellet feed consisting mainly of clupeidae fish meal in open system of circular aquarium. Subsequently, the lipid content and the composition of its fatty acid of the liver thus obtained were analyzed to characterize the nutrient and functional properties. Consequently, each liver consists similarly of about 70% lipid whose fatty acids are characteristic of rich functional components such as DHA and IPA, in 11.0-13.0% and 2.9-5.4% of the content respectively. These scores are higher than those of the liver of an anglerfish probably dependent on specifically high contents of functional fatty acids in the diet given. The seasonal variations of nutrient composition and contents each were not almost recognized.
2009-12-18