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Theses and Dissertations (Animal and Wildlife Sciences): Recent submissions
Now showing items 61-80 of 392
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(University of Pretoria, 2013)An assessment of the natural resources on Chapungu Ranch, Zimbabwe, was undertaken for the purpose of incorporating this ranch into the larger Sango Ranch. The geological description was based on literature, whilst the ...
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(University of Pretoria, 2013)South Africa is the world’s largest mohair-producing country, contributing over 50% of the world’s mohair, and therefore genetic improvement of Angora goats in South Africa is imperative in order to maintain this position ...
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(University of Pretoria, 2013)The cheetah (Acinonyx jubatus) has suffered dramatic range contractions and population declines as a result of habitat degradation, prey depletion and conflict with humans. Of further concern is that many of Africa’s ...
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(University of Pretoria, 2014)During prolonged effort, such as endurance exercise, the main sources of energy production for ADP phosphorylation are non-structural carbohydrates and fats. The relative percentage utilization of these two main energy ...
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(University of Pretoria, 2020)Acid-Binding Capacity (ABC) is measured as the amount of acid required to drop the pH of 1 kg feed to pH 3 and pH 4. Each feed ingredient will therefore contribute to the ABC value of complete feed and has the potential ...
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(University of Pretoria, 2020)The performance of grazing dairy cows, when supplemented with high levels of a maize-based concentrate, could potentially be improved in terms of higher milk and milk protein production by improving the essential amino ...
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(University of Pretoria, 2020)Collated data showed that the concentration range of bromide (Br-) in groundwater (GW) was between 0 – 132mg/L in selected provinces in South Africa where livestock production occurs. The no observed adverse effects level ...
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(University of Pretoria, 2020)Broilers are nearing their genetic potential and nutritional strategies are the primary means to improve their performance. Improving raw material quality, especially soybean meal, could improve broiler performance, health ...
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(University of Pretoria, 2020)Traditionally, the selection of beef cattle was based on the quantitative animal breeding theory and principles. The development of estimated breeding values (EBVs) resulted in accelerated genetic progress in most traits ...
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(University of Pretoria, 2020)Globally the demand for food, especially for food of animal origin, will double by the year 2025 and almost tripled by the year 2050. This means that animal nutritionists need to explore ways of ensuring that there will ...
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(University of Pretoria, 2020)In this study whole-genome SNP data from 1977 animals, originating from thirteen sheep breeds in South Africa was analysed. The animals were classified into three production types: dual-purpose (Afrino, Dohne Merino, Dormer, ...
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(University of Pretoria, 2021)Feed is the most expensive input in poultry production systems accounting for approximately 70% of the total production costs, with maize and soybean meals contributing the bulk of raw material ingredients used and ...
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Prediction of the growth performance of feedlot cattle using phenotypic and anthropometric measures (University of Pretoria, 2020)The price of purchasing and feeding feedlot cattle are expenses which contribute the most to the overall costs of a feedlot. Therefore, if the feedlot owner can purchase a specific breed type, or cattle with a specific ...
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(University of Pretoria, 2020-12-06)The study evaluated the integrated influences of red meat carcasses and product from red meat animals on price and supply of red meat carcasses. The purpose of the study was to assess the status of the South African red ...
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(University of Pretoria, 2019)Alternatives to antibiotics are constantly being studied and one such alternative is organic acids. Organic acids can lower the pH in the gastrointestinal tract (GIT) and the lowered pH renders the environment unfavourable ...
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(University of Pretoria, 2019)alcium and phosphorus are the two major macro-minerals required for proper growth and bone mineralisation in broiler chickens. Typical feed ingredients in broiler rations are low in calcium and phosphorus and inorganic ...
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(University of Pretoria, 2020)Standard industry practice is to formulate broiler diets to a total calcium (Ca) and available or digestible phosphorous (P). The limitation with this is that inherent characteristics of the limestone source (LS) and ...
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(University of Pretoria, 2019)Intense genetic selection for reduced back fat thickness and improved feed utilisation in pigs has resulted in modern genotypes with high lean gain potential, which now deposit a greater amount of lean tissue at faster ...
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(University of Pretoria, 2020)The aim of the study was to determine the effect of temperature on semen characteristics of beef bulls over a seven-year period. Data analysis was performed using ANOVA GLM Proc for 22 099 fresh semen data records used ...
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(University of Pretoria, 2019)The livestock industry has come under increasing scrutiny for using antibiotics sub-therapeutically as growth promoters. Increased awareness of the negative effects of microbial antibiotic resistance has amplified consumer ...
Now showing items 61-80 of 392