Poultry are very sensitive to heat
- Birds do not have sweat glands.
- The body temperature of the birds is around 41°C.
- A variation of 4°C in body temperature is lethal.
- The regulation of heat is done by perspiration, convection and increase of the exchange surface with the air (opening of the wings for example).
- Perspiration is a costly energy process for the animal (540 calories per gram of water in the lungs) which generates heat!
In addition to mortality, which has a direct impact on profits, heatstroke reduces zootechnical performance and amplifies economic losses:
- 25% of GMQ
- 20% of consumption
- 3% CI
- 26% increase in mortality
For temperatures of 31°C for 10 hours at 35-42 days of age (Quinteiro- Filho, 2010 & Quinteiro-Filho, 2012).