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Insufficient supply or quality of either leads to a decrease in growth and reproductive efficiency in domestic animals, especially in conjunction with the other stressors, and at worst, may increase mortality due to starvation. [24] This is a particularly acute issue when livestock herds are already of an unsustainable size.
Cattle are domesticated ungulates, a member of the family Bovidae, in the subfamily Bovinae, and descended from the aurochs (Bos primigenius). [46] They are raised as livestock for their flesh (called beef and veal), dairy products (milk), leather and as draught animals. As of 2009–2010 it is estimated that there are 1.3–1.4 billion head of ...
This approach is based on regression models developed for determining efficiency of feed use for weight gain during a standardized growth trial in growing beef cattle. [3] It was inspired by Koch's observations of the differences in how a maintained body weight and an increasing body weight affect the feeding of cattle.
The Hereford is a hardy breed of beef cattle, now raised in many countries around the world. Main articles: Meat industry , Cattle , Sheep farming , Pig farming , and Cuniculture Meat , mainly from farmed animals, is a major source of dietary protein and essential nutrients around the world, averaging about 8% of man's energy intake. [ 60 ]
Estrous synchronisation is the process of targeting female mammals to come to heat within a short time frame (36 to 96 hours). This is achieved through the use of one or more hormones. Methods to improve our ability to synchronize the reproductive process and result in the ‘timed insemination’ without the detection of heat have been developed.
Brahmousin cattle are a hybrid purebred breed of Brahman and Limousin first created in the US in the late 1970s. The goal was to blend the best of the Limousin and Brahman traits to create a breed that has reproductive efficiency, mothering ability, good muscling and growth traits, and adaptability to varying environmental conditions.
The Society for the Study of Reproduction (SSR) is an international not-for-profit [2] professional society for scientists working in the fields of reproduction, fertility and development. [3] The Society focuses on reproduction in both people and animals, including research from the areas of medicine, agriculture and basic biology.
Feed conversion ratio (FCR) is the ratio of inputs to outputs; it is the inverse of "feed efficiency" which is the ratio of outputs to inputs. [2] FCR is widely used in hog and poultry production, while FE is used more commonly with cattle. [2]
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