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    Effects of conjugated linoleic acids on protein to fat proportions, fatty acids, and plasma lipids in broilers (2000)

    Art
    Zeitschriftenartikel / wissenschaftlicher Beitrag
    Autoren
    Simon, O.
    Männe, K
    Schäer, K
    Sagredos, A
    Eder, K
    Quelle
    European journal of lipid science and technology : EJLST; 102 — S. 402–410
    ISSN: 1438-7697
    Sprache
    Englisch
    Kontakt
    Institut für Tierernährung

    Königin-Luise-Str. 49
    Gebäude 8
    14195 Berlin
    +49 30 838 52256
    tierernaehrung@vetmed.fu-berlin.de

    Abstract / Zusammenfassung

    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 the same amount of conjugated linoleic acids (CLA) in the experimental treatment. Diets of CLA treatment contained 18 g 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 quantitatively negligible. Performance parameters (weight gain and feed conversion ratio over 42 days) 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 rations 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 is 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.