Abstract
The lipid biosynthetic ability in the liver using [1-14C] sodium acetate and [1-14C] oleic acid as precursors and the in vitro hepatic lipase activity were examined to clarify the lipid metabolism of chum salmon. The decrease of triglyceride in the muscle and liver, and the increase of free fatty acid in the liver were found in spawning salmon. The lipase activity increased markedly during spawning migration. The high levels of sterol and triglyceride biosynthetic activities were found in the pre-spawning salmon, whereas phospholipid biosynthesis was almost the same level during spawning migration. The lipid metabolism in the liver was presumed to affect the lipid in the muscle of spawning salmon.
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