2014 Volume 63 Issue 6 Pages 555-566
The lipid and fatty acid compositions of the muscle and liver of adult and juvenile black rockfish, Sebastes schlegeli, and that of its stomach contents were examined to clarify its lipid characteristic and the difference between aquacultured and wild samples. Triacylglycerols were the dominant depot lipids of all samples, while phospholipids, such as phosphatidylethanolamine and phosphatidylcholine, were found to be the major components in the polar lipids. The cultured juvenile and young samples had high levels of 18:2n-6 (linoleic acid, 5.0% and 4.0–5.9% for TAG of juvenile and young samples) with low levels of 22:6n-3 (docosahexaenoic acid: DHA, 9.7% and 3.3–6.7% for TAG of juvenile and young samples), whereas the adults (both cultured and wild) had only trace levels of 18:2n-6 (0.6–1.3% and 1.0–1.3% for TAG of cultured and wild samples) with noticeable levels of DHA (3.3–19.7% and 5.2–11.9% for TAG of cultured and wild samples). Similar to the fatty acid profiles in TAG of both cultured and wild adult samples, those in the phospholipids of both the samples were very similar to each other. The lipid characteristics of the cultured adult S. schlegeli samples were similar to those of the wild ones, whose muscle phospholipids contained markedly high levels of DHA (38.3–40.2% for cultured and 40.1–43.5% for wild). Therefore, the nutritional values of cultured and wild adult S. schlegeli are expected to be similar.