An indirect, open-circuit calorimeter system for studies on the energy metabolism of chickens
2006
Koh, K.(Shinshu Univ., Minamiminowa, Nagano (Japan). Faculty of Agriculture) | Ohshima, Y. | Tomita, K. | Karasawa, Y.
1. An indirect, open-circuit calorimeter system which can measure not only daily heat production (HP), but also rapid changes of HP after feeding, was constructed for studies on the energy metabolism of growing or adult chickens weighing less than 2kg body weight. After confirming the performance of the system, biological experiments using growing broilers were performed. 2. Responses to changes of O2 and CO2 concentration in the air were delayed by only about 2 min and the recoveries of O2 and CO2 were 99.2% and 96.2%, respectively. The delays of responses and relatively low recovery of CO2 were recognized to have little effect on measuring HP in chickens. 3. The results of biological experiments, such as HP and respiratory quotient in fasted and fed birds, and the HP pattern in tube-fed birds, were in accordance with those in previous studies performed under similar experimental condition. 4. In conclusion, the system constructed in the present study was sufficient for measuring daily HP and rapid changes of HP in chickens after feeding.
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