Composition of fatty acids of spare fat of ducks fattened with feed with the addition of rapeseed meal subjected to various technological treatment

The composition of fatty acids of duck spare fats has been determined by gas-liquid chromatography. The ducks have been fed for 8 weeks with feed containing rapeseed meal after various steam-thermic treatment. The control group feed did not contain any rapeseed meal and that of group II, III and IV was after optimal, hard and mild steam-thermic treatment, respectively. The composition of fatty acids of periintestinal, subcutaneous and suet fat tissue has been evaluated. The results of the experiment became the evidence that addition of rapeseed meal in ducks feed influenced the composition of fatty acids of spare fats, especially in the group of unsaturated fatty acids. No significant differences appeared in the fatty acid composition between the various kinds of spare fats. The univocal influence of various steam-thermic treatment of rapeseed meal on changes of fatty acids composition of duck spare fats has not been revealed.