Stability of Extracted from the Ordinary Muscle arid Skin of Fishes

Abstract

The stability of lipids extracted from the ordinary muscle and skin of fishes was studied in connection with a preferential lipid oxidation in the skins during cold storage of the fishes.
Lipids extracted from the tissues were classed into two groups by weight gain method at 40°C: a small weight gain group of ordinary muscle lipids including skin lipid of plaice, and a large weight gain of skin lipids. In the small weight gain group, all of the lipids were composed of considerable amount of phospholippid and the stability of the lipids estimated by their induction periods was correlated with their total phospholipid contents and individual ones except for sphingomyelin. On the other hand, in the large weight gain group, the stability of lipids except for the skin lipid of striped pigfish, which was composed of small, amount of phospholipid, was correlated positively and negatively with 0-1 ene content and 4-6 ene content respectively.
The overall result, the preferential lipid oxidation in the skins was also accounted for by the stability of the lipids in itself which occured in the skin.