Factors influencing feed utilization and carcass quality in swine and mice
In an ever increasing world population the need for a food protein source of high biological value and of a short production cycle becomes increasingly urgent. Thriving on the by-products of a dense dairy industry in Western Europe, pork became a chief protein source in these people's diet. They learned early to breed and feed for lean pork carcasses. Restricted feeding did not pose a problem in the many small enterprises where manual labor was more abundant than in our mechanized agriculture. With the approach of a population density warranting a quality market for pork it is becoming more important to adopt a self-feeding technique for swine which will restrict nutrient intakes during the finishing period to levels that will produce meaty, high quality carcasses. Since it is becoming generally accepted that a dilution of the nutrients by fibrous materials (termed "bulk" in this report) will serve this end, the purpose of this investigation was to compare the effects on feed utilization and carcass quality of varying levels of different bulks in finishing rations for swine. Obvious advantages of small pilot animals in nutritional studies prompted the inclusion of mice in the project to learn to which extent they could serve as such for swine.
Master of Science (M.Sc.)