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Theses and Dissertations (Animal and Wildlife Sciences): Recent submissions
Now showing items 1-20 of 385
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(University of Pretoria, 2023-10-08)For a methane mitigation strategy to be sustainable it must either have no affect on product quality or have an added cobenefit in terms of improving the quality of meat. This study evaluated the effect of Acacia mearnsii ...
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(University of Pretoria, 2024-02)Smallholder beef cattle farming in South Africa is characterized as an important free-range farming system with the potential to alleviate poverty and up-lift the economy of rural communities. In this farming system, ...
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(University of Pretoria, 2024)The significant contribution of the livestock subsector to global warming and dietary energy loss as a result of enteric methane emission has drawn the attention of contemporary ruminant nutritionists to engage in more ...
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(University of Pretoria, 2023-08-30)Genomic differences between geographically separated Hereford populations may be characterised by using genomic diversity parameters, providing insight into different genes responsible for variation in traits of economic ...
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(University of Pretoria, 2023)South Africa (SA) has a diverse climate that poses potential challenges for future beef production. Different composite breeds that combine the superior growth and beef-producing potential of the European Bos taurus breeds ...
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(University of Pretoria, 2023)The genes of the muscle calpain system are the most important genes that affect beef tenderness and research on associations of these genotypes with beef quality traits in South African beef cattle is limited. Beef quality ...
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(University of Pretoria, 2023)This study utilized a landscape genomic approach to investigate growth performance in Bonsmara cows from three South African provinces, Eastern Cape, Free State and North-West. Landscape genomics seeks to investigate ...
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(University of Pretoria, 2023)South African smallholder farmers help reduce rural poverty and famine. Smallholder farmers in remote places have several obstacles that limit their growth and food security contributions compared to commercial farmers. ...
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(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 ...
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(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 ...
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(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 ...
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(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 ...
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(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 ...
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(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 ...
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(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 ...
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(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 ...
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(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 ...
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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 ...
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(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 ...
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(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 ...
Now showing items 1-20 of 385