Effect of dietary conjugated linoleic acid on body composition and energy balance in broiler chickens.
The effect of dietary conjugated linoleic acid (CLA) on body composition and energy metabolism was investigated in broiler chickens. Male broiler chicks were assigned to receive either a control diet (1 % sunflower oil) or a diet containing CLA (1 % of a 1:1 mixture of trans-10, cis-12 and cis-9, trans-11 isomers of octadecadienoic acid). The diets were fed ad libitum for 3 weeks and there were eight replicates per diet, each replicate including four chickens so that each treatment had thirty-two animals. The proportion of body fat was lower in the control group than in the CLA group. No significant differences as to the proportions of body water, ash and protein were observed. Feed and energy intake were significantly lower in CLA-fed birds. The percentage of ingested energy lost in excreta was higher after CLA feeding and heat expenditure as a percentage of ingested energy was lower in the CLA-fed group. The CLA-fed group showed a higher percentage of SFA and lower percentages of MUFA and PUFA in carcass fat. It is concluded that CLA stimulated de novo fatty acid synthesis and lowered desaturase activity.
Javadi
Marjan
M
Department of Nutrition, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 104 P.O. Box 80.152, 3508 TD Utrecht, The Netherlands.
Geelen
Math J H
MJ
Everts
Henk
H
Hovenier
Robert
R
Javadi
Shahram
S
Kappert
Henk
H
Beynen
Anton C
AC
D000821:Animal Feed; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D001823:Body Composition; D001835:Body Weight; D002151:Calorimetry; D002645:Chickens / Q000378:metabolism*; D004032:Diet; D004734:Energy Metabolism; D044243:Linoleic Acids, Conjugated / Q000008:administration & dosage*; D008297:Male; D010938:Plant Oils / Q000008:administration & dosage; D011897:Random Allocation; D000074242:Sunflower Oil
D044243:Linoleic Acids, Conjugated; D010938:Plant Oils; D000074242:Sunflower Oil; C046938:9,11-linoleic acid