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Metabolic and hormonal responses of growing modern meat-type chickens to fasting |
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| Authors: | K Christensen JP McMurtry YV Thaxton JP Thaxton A Corzo C McDaniel |
| Institution: | 1. OK Foods , Fort Smith , AR , USA;2. Department of Poultry Science , Mississippi State University , Mississippi , MS , USA;3. Agricultural Research Service , Animal and Natural Resources Institute , Beltsville , MD , USA;4. Department of Poultry Science , Mississippi State University , Mississippi , MS , USA;5. Center for Food Animal Well Being, Center of Excellence in Poultry Science , University of Arkansas , Fayetteville , AR , USA;6. Deceased;7. Department of Poultry Science , Mississippi State University , Mississippi , MS , USA |
| Abstract: | 1. The present study compared the effects of fasting on circulating concentrations of glucose, insulin and glucagon in male and female modern meat-type chickens (Ross 708) at three ages (19 d, 33 d and 47 d). 2. Plasma concentrations of glucose were reduced by fasting with reductions of 24.9% (19-d-old), 22.6% (33-d-old) and 17.9% (47-d-old) in broiler chickens fasted for 12 h. 3. Plasma concentrations of insulin decreased with fasting. For instance, circulating concentrations of insulin declined after 6 h of fasting by 45.7%, 54.7% and 50.0%, respectively, in 19-d-old, 33-d-old and 47-d-old broiler chickens. 4. Plasma concentrations of glucagon were increased by fasting. Plasma concentrations of glucagon were elevated by 3.79% (19-d-old), 3.51% (33-d-old) and 3.79% (47-d-old) with 6 h of fasting and remained elevated with 12 h, 18 h and 24 h of fasting. |
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