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Use of palm-oil by-products in chicken and rabbit feeds: effect on the fatty acid and tocol composition of meat, liver and plasma

Published online by Cambridge University Press:  23 November 2011

A. Tres ,
C. D. Nuchi ,
N. Magrinyà ,
F. Guardiola ,
R. Bou  and
R. Codony
A. Tres
Affiliation:
Nutrition and Food Science Department – XaRTA – INSA, Faculty of Pharmacy, University of Barcelona, Avinguda Joan XXIII s/n, E-08028 Barcelona, Spain
C. D. Nuchi
Affiliation:
Nutrition and Food Science Department – XaRTA – INSA, Faculty of Pharmacy, University of Barcelona, Avinguda Joan XXIII s/n, E-08028 Barcelona, Spain
N. Magrinyà
Affiliation:
Nutrition and Food Science Department – XaRTA – INSA, Faculty of Pharmacy, University of Barcelona, Avinguda Joan XXIII s/n, E-08028 Barcelona, Spain
F. Guardiola
Affiliation:
Nutrition and Food Science Department – XaRTA – INSA, Faculty of Pharmacy, University of Barcelona, Avinguda Joan XXIII s/n, E-08028 Barcelona, Spain
R. Bou
Affiliation:
Nutrition and Food Science Department – XaRTA – INSA, Faculty of Pharmacy, University of Barcelona, Avinguda Joan XXIII s/n, E-08028 Barcelona, Spain
R. Codony*
Affiliation:
Nutrition and Food Science Department – XaRTA – INSA, Faculty of Pharmacy, University of Barcelona, Avinguda Joan XXIII s/n, E-08028 Barcelona, Spain
*
†E-mail: [email protected]
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Abstract

This study was undertaken in the framework of a larger European project dealing with the characterization of fat co- and by-products from the food chain, available for feed uses. In this study, we compare the effects, on the fatty acid (FA) and tocol composition of chicken and rabbit tissues, of the addition to feeds of a palm fatty acid distillate, very low in trans fatty acids (TFA), and two levels of the corresponding hydrogenated by-product, containing intermediate and high levels of TFA. Thus, the experimental design included three treatments, formulated for each species, containing the three levels of TFA defined above. Obviously, due to the use of hydrogenated fats, the levels of saturated fatty acids (SFA) show clear differences between the three dietary treatments. The results show that diets high in TFA (76 g/kg fat) compared with those low in TFA (4.4 g/kg fat) led to a lower content of tocopherols and tocotrienols in tissues, although these differences were not always statistically significant, and show a different pattern for rabbit and chicken. The TFA content in meat, liver and plasma increased from low-to-high TFA feeds in both chicken and rabbit. However, the transfer ratios from feed were not proportional to the TFA levels in feeds, reflecting certain differences according to the animal species. Moreover, feeds containing fats higher in TFA induced significant changes in tissue SFA, monounsaturated fatty acids and polyunsaturated fatty acids composition, but different patterns can be described for chicken and rabbit and for each type of tissue.

Keywords

palm fatty acid distillatehydrogenated fatstrans fatty acidsfeed ingredientsfeed safety
Type
Full Paper
Information
animal , Volume 6 , Issue 6 , June 2012 , pp. 1005 - 1017
Copyright
Copyright © The Animal Consortium 2011

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