PERTANIKA JOURNAL OF TROPICAL AGRICULTURAL SCIENCE

Respiratory volumes were measured in the fowl during exposures to 35°C and 40°C. Two groups of birds were used namely normal 'wet' birds and water-restricted 'dry' birds. The results showed that there were no differences in respiratory volumes between the normal 'wet' birds and the 24 hour and 48 hour water restricted birds upon exposures to 35°C and 40°C. Total body water content did not affect the respiratory ventilation and consequently, the respiratory evaporative water loss.