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  • Title: Ruminant heat stress: effect on production and means of alleviation.
    Author: Morrison SR.
    Journal: J Anim Sci; 1983 Dec; 57(6):1594-600. PubMed ID: 6370944.
    Abstract:
    A review of the literature indicates heat stress generally causes lower milk production, decreased growth rate for cattle and lambs, but little effect on wool production. Breed and diet affects the degree of adverse response. Heat stress is caused primarily by high air temperature, but can be intensified by high humidity, thermal radiation and low air movement. Improving performance of animals under warm conditions involves breeding and management and modifying the environment. The former includes selection for heat tolerance, use of crossbred animals, diets with low heat increment in relation to energy for production and control of diseases and parasites. Environmental modifications may include provision of shades, use of water for evaporative cooling and increased air movement.
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