Kn. Barton et al., EFFECTS OF EXERCISE ON PLASMA NONESTERIFIED FATTY-ACIDS AND FREE AMINO-ACIDS IN ARCTIC CHAR (SALVELINUS-ALPINUS), The Journal of experimental zoology, 271(3), 1995, pp. 183-189
The plasma nonesterified fatty acids (NEFA) and free amino acids (AA)
of exercised and rested Arctic char (Salvelinus alpinus) were measured
. Total nonesterified fatty acids, total saturated fatty acids and tot
al monoenes were significantly elevated in the plasma of the exercised
group. Plasma levels of palmitate (16:0) were also significantly elev
ated in the exercised fish. No significant changes with exercise were
observed in the total polyenes. The total plasma free amino acid and t
otal nonessential amino acid levels were significantly elevated in the
exercised group. The concentrations of glutamate, alanine, taurine, a
nd tryptophan increased with exercise. The percent contribution of tot
al essential amino acids to total free amino acids in the exercised fi
sh was lower than that of the rested group. It is suggested that mobil
ization of specific nonesterified fatty acids and amino acids largely
reflect increased oxidation of metabolic substrates by exercising red
muscle. (C) 1995 Wiley-Liss, Inc.