1997 Volume 63 Issue 4 Pages 639-643
The chemical components such as moisture, crude protein, lipid, mineral contents, fatty acid composition, free amino acid contents, and histologic observation of diploid and triploid amago Oncorhynchus masou ishikawae were investigated throughout the year. In October, the lipid content of triploid amago was 2-3 times as high as that of diploid. On the other hand, the moisture content in triploid was fairly low. The mean value of cross-sectional area of muscle fibers in triploid clearly increased between March and June as compared with diploid and decreased in September the same as that of diploid. No remarkable difference was seen in the protein contents, mineral contents and fatty acid composition between diploid and triploid amago.
