Energy exchanges of broilers, selected for fatness and leanness, on diets with and without a repartitioning agent.
1. Two experiments were undertaken for 3 or 5 d in respiration chambers, on two experimental lines of broiler chickens (aged 25-38 d) selected for leanness and fatness. Diets were without or with 0.4 mg cimaterol per kg. 2. The lean line with sexes combined (experiment 1), or with females only, had a significantly greater heat production than the fat line. Net availability of metabolisable energy for gain (kg) was 0.54 for the lean birds and and 0.84 for the fat birds. 3. Cimaterol did not have an effect on any of the variables examined.
Department of Biochemistry, Microbiology and Nutrition, University of New England, Armidale, N.S.W., Australia.
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Aijun
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Farrell
D000273:Adipose Tissue / Q000033:anatomy & histology; D000318:Adrenergic beta-Agonists / Q000494:pharmacology*; D000818:Animals; D001833:Body Temperature Regulation / Q000187:drug effects / Q000235:genetics; D001835:Body Weight; D001947:Breeding; D002151:Calorimetry; D002645:Chickens / Q000235:genetics / Q000378:metabolism*; D002149:Energy Intake; D004734:Energy Metabolism / Q000187:drug effects / Q000235:genetics*; D004983:Ethanolamines / Q000494:pharmacology*; D005260:Female; D008297:Male
D000318:Adrenergic beta-Agonists; D004983:Ethanolamines; C047411:cimaterol