Comparison of Heat Production of Chickens Measured by Energy Balance and by Gaseous Exchange

摘要: An open-circuit respiration calorimeter suitable for chickens or other small animals has been constructed. The system contains two animal chambers and is capable of determining heat production groups independently simultaneously with gas collection apparatus continuous sampling chamber gases. operation the was tested in experiments by 10-week-old, full-fed cockerels over a 4-day period both energy retention (body balance) gaseous exchange. Heat (kilocalories per bird 24 hours) as determined balance versus exchange 359 348 one experiment 395 393 other. agreement sufficiently close to support use calorimetry measure under experimental conditions this laboratory without killing subjects. On basis metabolic body weight (in kilograms, W0.75) measured manner 161 173 kcal (day . 1 2, respectively.