Fig. 3. Concentrations of phospholipids (PL) (A), triacylglycerol (TAG) (B), and non-esterified fatty acids (NEFA) (C) in the plasma lipoproteins of rainbow trout after 4 days of rest or swimming at 1.5 BL s^–1. To allow comparisons between lipid classes, all concentrations are given in µmol fatty acids ml^–1 plasma. Absolute PL and TAG concentrations can be obtained by dividing the values presented in A by 2 (2 fatty acids per PL) and in B by 3 (3 fatty acids per TAG). Values are mean ± s.e.m. (N=7). HDL, high density, LDL, low density and VLDL, very low density lipoproteins.