Journal article
Authors list: Simon, O; Männer, K; Schäfer, K; Sagredos, A; Eder, K
Publication year: 2000
Pages: 402-410
Journal: European Journal of Lipid Science and Technology
Volume number: 102
Issue number: 6
ISSN: 1438-7697
Publisher: Wiley
Abstract:
In a performance trial, broiler chickens received 29 g per kg feed of a preparation containing 70% linoleic acid (LA) in the control treatment and another preparation containing approximately the same amount of conjugated linoleic acids (CLA) in the experimental treatment. Diets of CLA treatment contained 189 CLA per kg feed. The CLA preparation contained the isomers cis-9,trans-11 and trans-10,cis-12 at a proportion 1:1, other CLA isomers were quantitively negligible. Performance parameters (weight gain and feed conversion ratio over a 42 day period) were not significantly influenced by CLA intake. However, fat content of liver, breast, and leg muscles was reduced and protein contents in liver and leg muscles were elevated significantly. Fat to protein ratios in the main edible parts were shifted in favour of protein in CLA treated animals. In all analysed tissue lipids the content of saturated fatty acids was increased and that of monounsaturated fatty acids was decreased significantly. At the same time CLA was incorporated in tissue lipids effectively reaching more than 10 g per 100 g of total fatty acids. With regard to isomers the cis-9, trans-11 isomer was found in higher concentrations in tissue lipid fractions compared to the trans-10,cis-12 isomer. It was concluded that nutrient repartitioning due to CLA intake described for other species is also valid for broilers. Using appropriate feeding strategies it is possible to produce CLA enriched food from broilers.
