Lipid Measurements in Chickens Fed Different Combinations of Chicken Fat and Menhaden Oil

Source: Hope W. Phetteplace and Bruce A. Watkins

Presently, the specific level of dietary fish oil necessary to decrease plasma triacylglycerols in humans or poultry is not known. The experiment described herein was conducted to evaluate the effects of varying levels of menhaden oil on plasma triacylglycerols in broiler chickens. Six lipid treatments consisting of chicken fat/menhaden oil combinations were fed at 50 g/kg of diet. There were no significant differences in body, liver, heart, and abdominal fat pad weights or in total liver lipids and liver triacylglycerols due to the dietary treatments. As the levels of dietary n – 3 fatty acids and the polyunsaturate: saturate ratios increased, the amounts of triacylglycerols decreased in the plasma and in the very low density plus low density lipoprotein (VLDL + LDL) fractions. On the other hand, plasma triacylglycerol levels increased as the dietary n – 6 fatty acids increased. The dietary intake of n – 3 polyunsaturates in menhaden oil led to elevated levels of these fatty acids in the chicken tissues evaluated.