The effects of hot climates on animal productivity with particular reference to milk production in dairy cattle (a literature review) : A dissertation submitted in partial fulfilment for the Degree of Bachelor of Agricultural Science at Lincoln College

Abstract

All domesticated animals are homeotherms. This means that they aim to maintain a constant internal body temperature regardless of its external temperature. The deep body temperature varies between species, and in cattle this is typically 38.0 to 39.3°c. Cattle, along with other homeotherms, are subjected to a zone of thermoneutrality. This is the temperature range that the animal can maintain deep body temperature without altering its heat production. The following investigation of literature on the subject of high temperature influences on milk production in dairy cattle, outlines the problems and some possible solutions to the production of milk under the influence of high ambient temperatures .