Lighting Program Effects on Broiler Performance and Heat

s of papers 21 As the linear relationships between Tb and the respiratory parameters were unaltered by air movement it is proposed that the beneficial effects of this forced ventilation regime are through direct convective cooling and a reduction in deep body temperature. Convective cooling thus reduces the requirement for respiratory evaporation and therefore improves water conservation in addition to decreasing hyperthermic stress. The air movement induced reduction in thermal polypnea will also avoid excessive acid-base balance disturbances. It is proposed that air movements consistent with those achievable on mechanically ventilated commercial transporters will potentially improve productivity and welfare during journeys undertaken in hot conditions.