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  • Title: Respiration in exercising fowl. II. Respiratory water loss and heat balance.
    Author: Brackenbury JH, Gleeson M, Avery P.
    Journal: J Exp Biol; 1981 Aug; 93():327-32. PubMed ID: 7288356.
    Abstract:
    1. Respiratory water loss and rectal temperature were measured in domestic fowl running for 10 min on a treadmill at speeds of 1.24-4.3 km h-1 in air temperatures of 20 +/- 2 degrees C or 32 +/- 2 degrees C. 2. At given speeds the water loss at 32 +/- 2 degrees C was approximately twice that at 20 +/- 2 degrees C and the end-exercise rectal temperature was 0.5-0.8 degrees C higher. 3. At 20 +/- 2 degrees C, respiratory evaporation accounted for 10-12% of the total metabolic energy used at all speeds. At 32 +/- 2 degrees C, the fractional respiratory heat loss fell from 26.5% at 1.24 km h-1 to 17% at 3.6 km h-1. The fraction of the total metabolic energy stored as body heat rose progressively with air temperature.
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