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Theses and Dissertations (Animal and Wildlife Sciences): Recent submissions
Now showing items 41-60 of 391
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(University of Pretoria, 2022-07)The objective of this study was to evaluate the effect of rumen undegradable protein (RUP) and rumen protected lysine (RPLys) and methionine (RPMet) supplementation on growth performance, blood parameters and carcass ...
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(University of Pretoria, 2022)Phytases are supplemented to poultry diets to hydrolyse phytate, improve digestibility of P and thereby decrease P excretion and feed cost. It has been shown that the in vivo efficacy can differ between phytase sources, ...
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(University of Pretoria, 2021)The selection for improved sow productivity has led to an increase in litter size as well as an increase in the number of low-birth-weight piglets born. Low-birth-weight pigs are associated with slower growth rates, lighter ...
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(University of Pretoria, 2022-02-21)The purpose of this research was to investigate the effects of different combinations of steroidal growth implants alone or in combination with a beta–adrenergic agonist feed additive on the gonadal growth, relative to ADG ...
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(University of Pretoria, 2021)Ruminants emit methane which is a concern worldwide as it is linked to global warming. Supplemental methane mitigation strategies can't be imple- mented unless their risks and benefits on carcass quality are known. Past ...
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(University of Pretoria, 2022)Grazing land resources in the central highland of Ethiopia are shrinking due to deforestation, agricultural land expansion and continuous heavy grazing. Improved management of grazing lands necessitates the knowledge of ...
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(University of Pretoria, 2021)This study was conducted on 228 typical South African feedlot steers, of which 114 steers were fed 60 mg of zilpaterol HCl per steer per day for the final 30 days of the feedlot finishing period and the other 114 steers ...
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(University of Pretoria, 2021-10)The modern broiler has successfully been selected and bred year on year to grow faster, more efficient, and ultimately to be more profitable. Unfortunately, this rapid progress has over the years resulted in a whole range ...
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(University of Pretoria, 2022-02)Breeding genetically polled animals provide a welfare friendly alternative and a long-term solution to dehorning. The availability of high through-put genomic technology enables the study of the genetic mechanisms of polled ...
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(University of Pretoria, 2021)The objective of this study was to determine the effect of BCS and parity that affect the conception of the extensively farmed South African beef cows postpartum. The cows were synchronised using the 7-day Co-Sync + ...
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Improving ileal amino acid digestibility and broiler performance with dietary protease and xylanase (University of Pretoria, 2021)The use of exogenous enzymes in broiler diets is well documented, and in recent years their popularity has increased. With the rise of the global population leading to an increased demand in animal protein, farmers are ...
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(University of Pretoria, 2021)Nguni cattle have been a source of interest for several decades for researchers, breeders and farmers alike. The production efficiency potential, reproduction potential and adaptation of Nguni cattle are some of the most ...
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(University of Pretoria, 2021-12)Health and welfare are inextricably linked within efficient and sustainable dairy production. There are several potential risk factors which may affect the well-being of dairy cows, including chronic stress. Even though ...
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(University of Pretoria, 2021-11)Evaluation of genetic diversity in cattle populations is important to understand breed structure and for maintaining diversity. The aim of this study was to assess SNP based genomic diversity and population structure of ...
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(University of Pretoria, 2021-11-11)Broiler production has become one of the most highly productive segments in the food production sector owed to the rapid change in consumer demand for affordable protein sources. The use of organic trace minerals has taken ...
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(University of Pretoria, 2021)This study aimed to evaluate the attainment of puberty in indigenous sheep breeds: 7 ram lambs of the Bapedi, Namaqua-Afrikaner and Zulu sheep breeds were studied. Data was collected biweekly: Scrotal circumference was ...
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(University of Pretoria, 2021)determine to what extent it can replace a natural protein source without negatively affecting feedlot performance and rumen fermentation dynamics of lambs. The treatments were 0% urea (control), 0.42% urea, 0.83% urea, ...
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(University of Pretoria, 2021)Oocyte recovery, in vitro maturation (IVM) and in vitro fertilization (IVF) are reproductive technologies used to advance an oocyte to an embryo stage. The objectives of the study were to (1), compare oocyte retrieval ...
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(University of Pretoria, 2014)In this study 240 commercial dairy goats (130 Saanen, 51 Toggenburg and 59 British Alpine) were genotyped with a panel of 25 microsatellite markers, 16 of which were on the FAO/ISAG recommended list for genetic diversity ...
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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 ...
Now showing items 41-60 of 391