JavaScript is disabled for your browser. Some features of this site may not work without it.
Theses and Dissertations (Animal and Wildlife Sciences): Recent submissions
Now showing items 1-20 of 358
-
(University of Pretoria, 2022)High rigor mortis temperature carcass conditions occur when the pH drops below 6.0 while the temperature is still above 35ﹾC. The aim of this research was to find out if there is an increase in the prevalence of high rigor ...
-
(University of Pretoria, 2023)The broiler industry faces a growing pressure to reduce antibiotic growth promotors (AGP) from broiler feed due to public concern and the threat of antibiotic resistance. This has caused an upsurge in studies relating to ...
-
(University of Pretoria, 2023)A series of in vitro and in vivo experiments were conducted to evaluate the antimethanogenic properties of four medicinal plants (Aloe vera, Jatropha curcas, Moringa oleifera, and Piper betle) extracts as alternative rumen ...
-
(University of Pretoria, 2023)Developing healthier and more practically applicable intervention strategies for methane (CH4) inhibition emitted from ruminants has been a priority issue globally. Among the strategies, the use of natural medicinal plants ...
-
(University of Pretoria, 2023)Maize is a major component of broiler feed and consequently contributes largely to dietary energy values. Previous research showed nitrogen-corrected apparent metabolisable energy (AMEN) of maize varied due to differences ...
-
(University of Pretoria, 2023)1α-Hydroxycholecalciferol (1α-OH-D3) is a synthetic cholecalciferol derivative that is rapidly hydroxylated into 1α,25-dihydroxycholecalciferol, the biologically active form of cholecalciferol. 1α,25-Dihydroxycholecalciferol ...
-
(University of Pretoria, 2023)This thesis addresses the contribution of the smallholder mixed crop-livestock systems to greenhouse gas emissions. The first objective of the thesis was to quantify region-specific enteric methane emission factors for ...
-
(University of Pretoria, 2023)Abstract At high environmental temperatures (Ta), birds maintain homeostasis by dissipating heat via evaporative water loss (EWL). EWL is an important mechanism of heat dissipation by animals exposed to intense solar ...
-
(University of Pretoria, 2023)There is considerable pressure to eliminate the use of conventional cages in commercial layer production systems. Nonetheless, the assessment of alternative methods that can ensure the hen's ability to perform different ...
-
The impact of myostatin variants in the South African Bonsmara and Drakensberger beef cattle breeds (University of Pretoria, 2022)The Myostatin (MSTN) gene has been linked to the double muscling phenomenon, in which a succession of mutations rendersthe gene inactive and unable to regulate muscle fibre deposition effectively. This study aimed to ...
-
(University of Pretoria, 2022-12-15)Title: Concentrate supplementation to Jersey cows grazing plantain and ryegrass When compared to TMR-based dairy production systems, pasture-based dairy production systems produce milk at a lower cost per litre. Nutrients ...
-
(University of Pretoria, 2022)The study aimed to investigate the supplementation effect of Acacia mearnsii tannin extract and ß-carotene on the production and reproduction performance of sheep. To achieve this aim four studies (two experiments, one ...
-
(University of Pretoria, 2022)Climate change is expected to result in rainfall reduction in South African semi-arid and arid rangelands and may have severe ecological consequences. This rainfall reduction may cause irreversible and substantial ...
-
(University of Pretoria, 2022)Feed additives are commonly used to modify the rumen microbiome towards more energy efficient pathways, such as the production of propionate. The urgency for the replacement or decrease in use of antibiotic growth promoters ...
-
(University of Pretoria, 2022)There has been substantial growth in the small holder pig farming sector in South Africa. These farmers vary from market-orientated farmers to pig keepers with different available resources. There is a need to understand ...
-
(University of Pretoria, 2022-12-15)The feral Tankwa goat is a landrace breed of domesticated goat (Capra Hircus) originating from the Tankwa Karoo National Park. This landrace breed is being managed and conserved by the Northern Cape Department of ...
-
(University of Pretoria, 2022)Commercial broiler breeding programs have greatly focused on increased growth rates, not considering the lack of pulmonary capacity to sustain this demand. Although not all broilers succumb to ascites the syndrome is still ...
-
(University of Pretoria, 2022)In South Africa, maize and soybean form the main component of broiler diets. The anti-nutritional properties in these ingredients negatively influence the performance of broilers. Non-starch polysaccharides and phytate are ...
-
(University of Pretoria, 2022-12-06)Pre-slaughter loss of live mass due to transportation is a well-known occurrence in the beef production industry – predominantly regarding the economic sustainability thereof because it represents a potentially significant ...
-
(University of Pretoria, 2022-12-15)The aim of this study was to evaluate the possible effects of two different zilpaterol hydrochloride (ZH) beta-agonists - with further focus being placed on the viability of the generic Grofactor® product when compared ...
Now showing items 1-20 of 358