Abstract
We aimed to investigate the content and the fatty acid composition of total lipids in the central part of dorsal muscles of pink salmon caught in the coast of the Sea of Okhotsk. The sex differences and their changes depending on the date of fishing were studied. The lipid was extracted from the central part of dorsal muscles by FOLCH method and the fatty acids were analyzed by GLC method. The lipid contents were within the range from 1.52 to 2.62%, however, no significant differences in contents were found between sexes and fishing date. The dorsal muscles of the heavy subjects showed a tendency of higher contents of lipid. In addition, the fatty acid compositions were compared among the subjects in respect of the fishing date and sex, there was no noticeable difference in fatty acid constituents of dorsal muscles in each fishing date. The major fatty acids of the samples were C14 : 0, C16 : 0, C18 : 0, C16 : 1, C18 : 1, C20 : 1, C18 : 2, C20 : 5 and C22 : 6. The sum of these acids was more than 85% of the total acids in each samples. The male pink salmon revealed higher contents of C18 : 0, C18 : 1, total saturated fatty acids and total polyenoic fatty acids, although there were more higher contents of C20 : 1, C24 : 1 and total monoenoic acids in the female. The content of total saturated fatty acids was 25.41±13.09%. On the other hand the contents of total monoenoic and polyenoic acids were 48.90±6.93 and 21.88± 5.325%, respectively.
