Effects of adaptation to different salinities on the lipids of various tissues in sea dace (Dicentrarchus labrax pisces).

1. Effects of adaptation to four salinities (4, 18, 36 and 40 per 1000) have been studied in the main lipidic constituents (triglycerides, phospholipids, free fatty acids, cholesterol, triglyceride fatty acids) of the liver, muscle and intestinal tissue of Dicentrarchus labrax--a euryhaline fish. 2. The study has been undertaken in spring, at a constant temperature of 13 degrees C after an adaptation of one month in the experimental reserve, with unchanged industrial food. 3. Salinities 40, 36 and 18 per 1000 higher than the iso-osmotic salinity of blood plasma do not induce important changes in the above lipids, whereas a salinity of 4 per 1000 produces interpretable changes such as a decrease in lipogenesis.