Heat training for prenatal period of ontogenesis as a method to increase the thermotolerance in poultry(review)

Imprinting of such training by the appropriate systems of an individual. Heat training causes a training epigenetic heat adaptation in chickens, but not always for a long time. More over, the heat training in the first half of incubation, when embryos are essentially poikilothermic, is unreasonable. In order to maintain the reaction, achieved through the training, an intensity of thermal factor must be modified wave-like. A need to study the characteristics of integration and the reactivity of stress-limiting systems, as well as critical periods and patterns of heat training imprinting at various stages of ontogenesis is discussed. As a result, the management techniques can be developed to control the activity of appropriate systems and home-ostasis and ensure the welfare of birds in industrial poultry farming and under climate change.