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Fish ecology and ecophysiology in an anthropogenically-altered temporarily open/closed estuary in the warm-temperate region of the Eastern Cape Province, South Africa

  • Authors: Mpinga, Mfundo
  • Date: 2021-04
  • Subjects: Gqeberha (South Africa) , Eastern Cape (South Africa) , Fishes--Ecology--South Africa
  • Language: English
  • Type: Master's theses , text
  • Identifier: http://hdl.handle.net/10948/52122 , vital:43431
  • Description: Estuaries are globally recognized for their contribution to the coastal marine environment by acting as nursery grounds for numerous marine estuarine-dependent fish species. These linking ecosystems between marine and riverine environments, are ideal for these species due to the habitat diversity, nutrient and food availability, shallower and calmer environments they provide relative to the ocean. Abrupt hydrodynamic and physico-chemical changes which frequently occur in estuaries impose physiological stress and requires superior adaptability in the fish that reside within them. This is exacerbated by anthropogenic modifications to estuaries which affects their natural ecological function. The Seekoei Estuary is one of 192 temporarily open/closed estuaries (TOCEs) in South Africa and these estuaries are characterised by their periodical connection to the sea due to the formation of a mouth berm. These estuaries are the dominant type in South Africa. A lot of research has been done in these kinds of estuaries, however, it is still limited due to their vast numbers. These estuaries are popular for human settlement and this has led to mismanagement due to the lack of ecological information. Furthermore, because of their inability to continuously flush out water, temporarily open closed estuaries are more vulnerable to pollution and anthropogenic modifications. The aim of this study was to assess the small fish community in relation to their environment in the hypersaline anthropogenically-altered Seekoei Estuary, by analysing the spatio-temporal trends of physico-chemical properties, nutrient loads, phytoplankton biomass and fish community structure. In addition, histological adaptation in gills of fish that survive hypersaline water was investigated. The study found that physico-chemical properties were influenced by anthropogenic alterations, in particular adverse water abstraction, instream water obstructions and artificial breaching. Nutrient concentration was found to be influenced by the intense agricultural practices in the upper reaches. It was evident that nutrient concentration (dissolved inorganic phosphorus) coupled with high salinity and optimum temperature (15 oC - 20 oC) affected the phytoplankton biomass. This estuary’s inability to naturally breach makes it vulnerable to phytoplankton blooms. The accumulation of cohesive silt caused by low river inflow, due to water abstraction in the upper reaches, was attributed to this estuary’s prolonged mouth closure. This was exacerbated by the presence of the causeway, which acts as a barrier between the middle and lower estuary. The abundance of marine fish species in the estuary, despite its long closure, indicates that the larvae and juveniles of these species make use of overwash events and brief artificial breaching events to recruit into the estuary. The high species richness in iii sites below the causeway is indicative of the barrier effect, which prevents the migration of some species to the upper reaches. This was evident during a massive fish kill, recorded during this study, which was more severe in sites below the causeway than above it. Chloride cell hyperplasia, mucus secretion and thickening of the epithelial layer in gills of indicator fish species from this estuary was the histological adaptation, which enables these fishes to be tolerant to high salinity. , Thesis (MSc) -- Faculty of Science, School of Environmental Sciences, 2021
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  • Date Issued: 2021-04

African wildcats on unprotected land in the Northern Cape, South Africa: potential prey and conflict status

  • Authors: Stadler, Cindy
  • Date: 2021-10-29
  • Subjects: African wildcat South Africa Northern Cape , African wildcat Effect of human beings on South Africa Northern Cape , Predation (Biology) South Africa Northern Cape , Livestock Predators of South Africa Northern Cape , Human-animal relationships South Africa Northern Cape
  • Language: English
  • Type: Master's theses , text
  • Identifier: http://hdl.handle.net/10962/191012 , vital:45049
  • Description: The African wildcat (Felis lybica cafra) is the most common and widely distributed of all wildcats. The southern Kalahari in South Africa offers favourable conditions for African wildcats and supports high wildcat densities on protected and unprotected land. African wildcats have been reported as livestock predators on South African farms, however wildcat-livestock predation is usually reported as infrequent and to have a low financial impact on the farmer. The aim of this study was, firstly, to determine what natural prey species were available for African wildcats on unprotected land and, secondly, to determine the extent of human-wildcat conflict on unprotected land in the southern Kalahari. The frequency of occurrence of potential African wildcat prey was determined through small mammal trapping, camera trap surveys and direct observations. The results indicated that a variety of the African wildcat’s natural prey species occurred on unprotected land and that the dune and adjacent ‘street' habitats most likely supported the majority of small mammals which are preferred prey for African wildcats. The African wildcat’s human-predator conflict status was determined through interview questionnaires (n = 22) with participants who owned or managed farms in the southern Kalahari. African wildcats were perceived to occur on 100% of farms, to be common in the region, to be the top livestock predator on 68% of farms and to be responsible for 46% (n = 1542 newborn lambs) of all livestock deaths in 2020. African wildcats were, however, not viewed in the same negative light as black-backed jackals (Canis mesomelas) and caracals (Caracal caracal), who received more negativity from participants and who had the highest persecution rates in my study area. This result could potentially be explained by a combination of generationally taught hatred towards certain species and due to the perceived livestock loss (e.g. livestock size and species) caused by each predator species. It is important to research and monitor wildcats outside protected areas to obtain a deeper knowledge of wildcat behaviour, abundance, population dynamics and other aspects of their ecology. By doing this, specific conservation and management questions can be addressed and through the knowledge of the natural history of a species, conservation failures can be avoided. , Thesis (MSc) -- Faculty of Science, Zoology and Entomology, 2021
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  • Date Issued: 2021-10-29

An educational intervention on the prevention of catheter-related bloodstream infections in haemodialysis patients in Eswatini

  • Authors: Simelane, Delisile
  • Date: 2021-04
  • Subjects: Grahamstown (South Africa) , Catheterization -- Complications -- Eswatini , Infection Control
  • Language: English
  • Type: Master's theses , text
  • Identifier: http://hdl.handle.net/10948/51906 , vital:43383
  • Description: Nurses are health care professionals whose duty it is to protect patients from acquiring infections while hospitalised in a health care setup. By maintaining an infection-free environment, it is expected that the patient's recovery will be promoted, and high-quality nursing care will be delivered. This also applies to the prevention of catheter-related bloodstream infections (CRBSIs) in haemodialysis patients. As nurses spend most of their nursing time with patients, they should have a good level of understanding of infection prevention and control in health care setups. In Eswatini, central venous catheters (CVCs) are commonly used for vascular access in patients who require haemodialysis. From the latest data available in the country's three largest regional hospitals, the proportion of haemodialysis patients with CVCs hospitalised for CRBSIs was 27% (64/239) January to December 2020. Further, it is unclear whether professional nurses have knowledge on the prevention of CRBSIs. This study aimed to investigate the effect of an educational intervention, based on the Centre for Disease Control (CDC) Guidelines, on professional nurses' knowledge regarding the prevention of CRBSIs in haemodialysis patients in hospitals in Eswatini (previously known as Swaziland). The study used a convenience sample including all professional nurses and nurse managers (N=99) employed at the renal and intensive care units (ICUs) at the five hospitals (Hospitals A-E) in Eswatini where haemolysis is conducted. The study is underpinned by Florence Nightingale's Theory and the Knowledge-to-Action Framework. The research study followed a positivistic, quantitative research paradigm, using a quasi-experimental, one-group, pre-post-test design with an interventional research approach, to be conducted in three phases. The first phase was the distribution of a pre-test questionnaire to all professional nurses and nurse managers working in renal units and those in ICUs that are also managing CVCs in order to assess their knowledge regarding the prevention of CRBSIs in haemodialysis patients. The second phase included the educational intervention, which was developed, reviewed and presented by the researcher to professional nurses. The third phase included the distribution of a post-test questionnaire to the professional nurses to assess the effect of the educational intervention on their knowledge.The pre-and post-test questionnaires were developed by the researcher, in line with the educational intervention (and informed based on the pre-test findings), reviewed by six experts and pilot tested to ascertain its validity and reliability. The researcher captured the data using Microsoft Excel and, with the assistance of a statistician, who performed statistical analyses using Cronbach's alpha, One-sample t-tests, Cohen's Kappa, Cohen's D, and Chi-square test. Ethical principles, according to the Belmont Report, including autonomy, beneficence and justice, and appropriate standards of rigour were maintained throughout the research study. In this study the overall knowledge was good with a mean score of 75.05 ±8.74 for the pre-test and 77.75±9.55 for the post-test. The knowledge scores for the factor infection prevention was higher (pre-test: 83.33±9.28 versus post-test: 85.14±8.28) compared to the factor catheter care (pre-test: 66.76±13.13 versus post-test: 70.38±14.27). The factor catheter care and age was significantly related in the pre-test with a p-value of .043 between groups. The factor infection prevention and how long practising in the unit were significantly related in the pre-test, with a p-value of .029 between groups. The factor infection prevention in the pre-test had a medium significant difference between >1 year and >5 years practicing in the unit (Scheffé p .048 and Cohen's d 0.77). The study is the first in the field of nursing in Eswatini. The educational intervention can be used by nurses in renal units and ICUs to close knowledge-practice gaps that can put patients at higher risk for CRBSIs, but requires further development and testing. , Thesis (MN) -- Faculty of Health Sciences, 2021
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  • Date Issued: 2021-04

The utilisation of performance management system for effective provision of services: a case study of the Greater Taung Local Municipality

  • Authors: Edward, Keikanetswe Angelina
  • Date: 2021-04
  • Subjects: Personnel management -- South Africa -- North-West
  • Language: English
  • Type: Master's theses , text
  • Identifier: http://hdl.handle.net/10948/52508 , vital:43682
  • Description: Many rural municipalities are facing challenges in service delivery, and the Greater Taung Local Municipality(GTLM) is no exception. The performance management system plays a pivotal role in the improvement of service delivery and for this to be realised, there are elements that contribute negatively to the system which are a threat and if not managed properly, the aims and objectives of the development would not be possible. The main challenges in the way of implementation of a performance management system, according to the findings, are that the service delivery department of the municipality does not fully comply with the system, non-implementation of the system and/or inadequate skills and knowledge of employees. The aim of the study is to evaluate the utilisation of performance management in the provision of effective service delivery in the Greater Taung Local Municipality. The literature review of performance management has guided the researcher and enables her understanding of performance management system implementation. The main objectives of the research study are therefore to:  To determine the purpose of performance management;  To determine ways in which performance management improve an employees’ skills and performance;  To assess the application of performance management policy at the Greater Taung Local Municipality; and  To determine how performance management by the Greater Taung Local Municipality assists in service delivery. A qualitative research method was used to collect data in a form of questionnaires and a literature review, which includes e.g. legislation, policies, journals, books, newspaper articles etc. This method guided the researcher to control the data received by communicating the meaning of what had been learnt during the process of data analysis. The main recommendations of this research study are that more needs to be done in defining the performance management system to employees so that there can be a proper understanding and that a senior official’s perception of the system needs to change. Training would provide the necessary skills for employees to carry out their tasks, thereby meeting the developmental goals of the municipality. In conclusion, the implementation of the research recommendations in this study would improve the utilisation of performance management system and provide effective service delivery in the Greater Taung Local Municipality. , Thesis (MPA) -- Faculty of Humanities, 2021
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  • Date Issued: 2021-04

A design of a convention centre in the kuiseb river valley, Namib desert

  • Authors: Davids, Maretha
  • Date: 2021-04
  • Subjects: Convention facilities-- Namibia --Kuiseb river -- Designs and plans , Kuiseb River (Namibia)
  • Language: English
  • Type: Master's theses , text
  • Identifier: http://hdl.handle.net/10948/57466 , vital:57876
  • Description: At least 55 million years old, the Namib Desert is the oldest desert in the world. With many species making up the diverse ecosystem the question remains, how do they survive with less than 200 mm of rainfall per year? (Lovegrove 1993) Survival in harsh climatic conditions have been tried and conquered across the world, from desert to artic conditions. With a harsh climatic environment and barren conditions, where does one set up a place of gathering? With tourism being one of the main pillars of the economy in Namibia. On an already existing route along a perennial water source, a conference centre is set up as a midway point for meeting of tourists with a local flair (Humavindu, 2013 Through learning from this environment and environments similar to these, the final product of this treatise results in a place of meeting along this string of settlements along the river, through means of bio-inspired design and phenomenological theories of place making. The challenge of nature vs building is questioned. Forming a unique experience as a sustainable oasis within the harsh surrounds the project sits within, amplifying the context in which it sits. , Thesis (MArch) -- Faculty of Engineering, the Built Environment and Technology, School of Architecture, 2021
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  • Date Issued: 2021-04

Problems facing governance of small business in South Africa: non-owner perspective

  • Authors: Mabotha, Mathipe Pontsho Ramakgahlele
  • Date: 2021-04
  • Subjects: Small business -- Management , New business enterprises -- South Africa , Corporate governance -- South Africa
  • Language: English
  • Type: Master's theses , text
  • Identifier: http://hdl.handle.net/10948/51787 , vital:43372
  • Description: Small businesses have been perceived to have governance problems in South Africa. The problem is that in SA there is a limited amount of research available regarding these complex investigations into the problems of governance of SMEs in South Africa. The objectives of this study were to conduct an extensive literature review on governance of small businesses, and the factors which affect the governance of such small businesses and what key resources could be identified and built up for the successful adoption of innovations in the sector, to lead to an understand of weaknesses in the current capacity-building of SMEs. It also sought to determine the current situations contributing to the weaknesses of SMEs; to understand challenges in the governance of small businesses in South Africa, to determine the types of financial support that exists and the contribution of financial support to the development of SMEs and to understand the ways government can help and develop SMEs. Qualitative research was used because it is more subjective and relies on experiences and opinions of participants. The study used exploratory research. An interview protocol for semi-structured face-to-face interviews was designed and used to obtain the views of SME owners and managers. The findings of the study showed that a lack of financial support is one of the challenges in the current capacity-building of small businesses. Moreover, the findings of the study showed that access to information on available markets and on the creation of new opportunities is another weakness in the current capacity-building of small businesses. SMEs need access to buyers, information on product demand, pricing knowledge and standards. The findings of the study also showed that the lack of support through business management knowledge is one of the weaknesses in the current capacity-building of small businesses. The findings showed that, most small business owners do not have the needed business management knowledge to transform their businesses. The study recommends that the government assist small businesses with financial support. It is also suggested that small businesses have human resource management knowledge to manage people who help them develop their businesses. Moreover, the study recommends that small businesses embrace new technology to boost their business by easy operations using new technologies. Moreover, the study recommends that small businesses owners use the same strategies, approaches and novel technology to compete with other businesses all over the world since there is fierce competition due to globalization. , Thesis (MBA) -- Faculty of Business and Economic Sciences, Business Administration, 2021
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  • Date Issued: 2021-04

Recreating a wetland at an abandoned saltworks : towards a rehabilitation plan

  • Authors: Wasserman, Johan
  • Date: 2021-04
  • Subjects: Gqeberha (South Africa) , Eastern Cape (South Africa) , South Africa
  • Language: English
  • Type: Master's theses , text
  • Identifier: http://hdl.handle.net/10948/52146 , vital:43450
  • Description: A saltworks at Swartkops Estuary was abandoned in 2018. While operational, the saltworks hosted some of the largest breeding colonies of several shorebird species in southern Africa and hosted thousands of Palearctic migrant waterbirds annually. The abandonment of the saltworks has resulted in the loss of the artificially managed hydrological regime and therefore the wetland function and habitat value of the site, and the rich and diverse avifauna that once occurred at the site have not returned. The rehabilitation of the saltworks as a wetland that functions as a waterbird sanctuary is currently being organised, and this research aimed to create a plan for implementing and monitoring the rehabilitation. In order to do so, the baseline environmental condition of the abandoned saltworks was established, the possible rehabilitation interventions necessary for rehabilitating the site were assessed, and the potential ecological implications of any interventions were investigated. The assessment of the saltworks’ baseline condition revealed that the site is now characterised by vast expanses of dry hypersaline sediment with sparse patches of monospecific vegetation and depauperate avifauna. The once rich and diverse waterbird communities have all but disappeared since the site was abandoned and are unlikely to return unless a managed hydrological regime is reinstated. Furthermore, it is improbable that salt marsh vegetation will cover the abandoned saltworks primarily due to the high sediment salinity that will persist unless the saltpans are flooded. The area will likely remain barren with little ecological value if no rehabilitation action is taken. Two potential rehabilitation options for reinstating a hydrological regime at the saltworks were identified: (1) pumping estuary water into all of the saltpans; or (2) pumping estuary water into some of the saltpans, while allowing the largest one to be filled with stormwater. Both options were deemed to be feasible; however, the second option will likely have lower running costs. The use of stormwater to fill the one saltpan is expected to result in brackish conditions initially, while the saltpans filled with estuary water would have salinity levels ranging from euhaline to slightly hypersaline. Both the stormwater and estuary water are rich in inorganic nutrients – the estuary water is rich in both dissolved inorganic nitrogen (DIN) and dissolved inorganic phosphorus (DIP), while the stormwater has an exceptionally high DIN content. This raised concerns of creating eutrophic wetlands with detrimental conditions such as algal blooms and a hypoxic water column. , Thesis (MSc) -- Faculty of Science, School of Environmental Sciences, 2021
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  • Date Issued: 2021-04

The reproductive performance, demography and spatial ecology of an extralimital white rhinoceros population

Constraining simulation uncertainties in a hydrological model of the Congo River Basin including a combined modelling approach for channel-wetland exchanges

  • Authors: Kabuya, Pierre Mulamba
  • Date: 2021-04
  • Subjects: Congo River Watershed , Watersheds -- Congo (Democratic Republic) , Hydrologic models , Rain and rainfall -- Mathematical models , Runoff -- Mathematical models , Wetland hydrology
  • Language: English
  • Type: thesis , text , Doctoral , PhD
  • Identifier: http://hdl.handle.net/10962/177997 , vital:42897 , 10.21504/10962/177997
  • Description: Compared to other large river basins of the world, such as the Amazon, the Congo River Basin appears to be the most ungauged and less studied. This is partly because the basin lacks sufficient observational hydro-climatic monitoring stations and appropriate information on physiographic basin properties at a spatial scale deemed for hydrological applications, making it difficult to estimate water resources at the scale of sub-basins (Chapter 3). In the same time, the basin is facing the challenges related to rapid population growth, uncontrolled urbanisation as well as climate change. Adequate quantification of hydrological processes across different spatial and temporal scales in the basin, and the drivers of change, is essential for prediction and strategic planning to ensure sustainable management of water resources in the Congo River Basin. Hydrological models are particularly important to generate the required information. However, the shortness of the available streamflow records, lack of spatial representativeness of the available streamflow gauging stations and the lack of understanding of the processes in channel-wetland exchanges, are the main challenges that constrain the use of traditional approaches to models development. They also contribute to increased uncertainty in the estimation of water resources across the basin (Chapter 1 and 2). Given this ungauged nature of the Congo River Basin, it is important to resort to hydrological modelling approaches that can reasonably quantify and model the uncertainty associated with water resources estimation (Chapter 4) to make hydrological predictions reliable. This study explores appropriate methods for hydrological predictions and water resources assessment in ungauged catchments of the Congo River Basin. In this context, the core modelling framework combines the quantification of uncertainty in constraint indices, hydrological modelling and hydrodynamic modelling. The latter accounts for channel-wetland exchanges in sub-basins where wetlands exert considerable influence on downstream flow regimes at the monthly time scale. The constraint indices are the characteristics of a sub-basin’s long-term hydrological behaviour and may reflect the dynamics of the different components of the catchment water balance such as climate, water storage and different runoff processes. Currently, six constraint indices namely the mean monthly runoff volume (MMQ in m3 *106), mean monthly groundwater recharge depth (MMR in mm), the 10th, 50th and 90th percentiles of the flow duration curve expressed as a fraction of MMQ (Q10/MMQ, Q50/MMQ, Q90/MMQ) and the percentage of time that zero flows are expected (%Zero), are used in the modelling approach. These were judged to be the minimum number of key indices that can discriminate between different hydrological responses. The constraint indices in the framework help to determine an uncertainty range within which behavioural model parameters of the expected hydrological response can be identified. Predictive equations of the constraint indices across all climate and physiographic regions of the Congo Basin were based only on the aridity index because it was the most influential sub-basin attribute (Chapter 5) for which quantitative information was available. The degree of uncertainty in the constraint Q10/MMQ and Q50/MMQ indices is less than 41%, while it is somewhat higher for the mean monthly runoff (MMQ) and Q90/MMQ constraint indices. The established uncertainty ranges of the constraint indices were tested in some selected sub-basins of the Congo Basin, including the Lualaba (93 sub-basins), Sangha (24 sub-basins), Oubangui (19 sub-basins), Batéké plateaux (4 sub-basins), Kasai (4 sub-basins) and Inkisi (3 sub-basins). The results proved useful through the application of a 2-stage uncertainty approach of the PITMAN model. However, it comes out of this study that the application of the original constraint indices ranges (Chapter 5) generated satisfactory simulation results in some areas, while in others both small and large adjustments were required to fully capture some aspects of the observed hydrological responses (Chapter 6). Part of the reason is attributed to the availability and quality of streamflow data used to develop the constraint indices ranges (Chapter 5). The main issue identified in the modelling process was whether the changes made to the original constraints at headwater-gauged sub-basins can be applied to ungauged upstream sub-basins to match the observed flow at downstream gauging stations. Ideally, only gauged sub-basin’s constraints can be easily revised based on the observed flow. However, the refinement made to gauged sub-basins alone may fail to substantially affect the results if ungauged upstream sub-basins exert a major impact on defining downstream hydrological response. The majority of gauging stations used in this analysis are located downstream of many upstream ungauged sub-basins and therefore adjustments were required in ungauged sub-basins. These adjustments consist of shifting the full range of a constraint index either towards higher or lower values, depending on the degree to which the simulated uncertainty bounds depart from the observed flow. While this modelling approach seems effective in capturing many aspects of the hydrological responses with a reduced level of uncertainty compared to a previous study, it is recommended that the approach be extended to the remaining parts of the Congo Basin and assessed under current and future development conditions including environmental changes. A 2D hydrodynamic river-wetland model (LISFLOOD-FP) has been used to explicitly represent the inundation process exchanges between river channels and wetland systems. The hydrodynamic modelling outputs are used to calibrate the PITMAN wetland sub-model parameters. The five hydrodynamic models constructed for Ankoro, Kamalondo, Kundelungu, Mweru and Tshiangalele wetland systems have been partially validated using independent estimates of inundation extents available from Landsat imagery. Other sources of data such as remote sensing of water level altimetry, SAR images and wetland storage estimates may be used to improve the validation results. However, the important objective in this study was to make sure that flow volume exchanges between river channels and their adjacent floodplains were being simulated realistically. The wetland sub-model parameters are calibrated in a spreadsheet version of the PITMAN wetland routine to achieve visual correspondence between the LISFLOOD-FP and PITMAN wetland sub-model outputs (Storage volumes and channel outputs). The hysteretic patterns of the river-wetland processes were quantified using hysteresis indices and were associated with the spill and return flow parameters of the wetland sub-model and eventually with the wetland morphometric characteristics. One example is the scale parameter of the return flow function (AA), which shows a good relationship with the average surface slope of the wetland when the coefficient parameter (BB) of the same function is kept constant to a value of 1.25. The same parameter (AA) is a good indicator of the wetland emptying mechanism. A small AA indicates a wetland that slowly releases its flow, resulting in a highly delayed and attenuated hydrological response in downstream sub-basins. This understanding has a practical advantage for the estimation of the PITMAN wetland parameters in the many areas where it is not possible, or where the resources are not available, to run complex hydrodynamic models (Chapter 7). The inclusion of these LISFLOOD-FP informed wetland parameters in the basin-scale hydrological modelling results in acceptable simulations for the lower Lualaba drainage system. The small wetlands, like Ankoro and Tshiangalele, have a negligible impact on downstream flow regimes, whereas large wetlands, such as Kamalondo and Mweru, have very large impacts. In general, the testing of the original constraint indices in the region of wetlands and further downstream of the Lualaba drainage system has shown acceptable results. However, there remains an unresolved uncertainty issue related to the under and over-estimation of some aspects of the hydrological response at both Mulongo and Ankoro, two gauging stations in the immediate downstream of the Kamalondo wetland system. It is difficult to attribute this uncertainty to Kamalondo wetland parameters alone because many of the incremental sub-basins contributing to wetland inflows are ungauged. The issue at Mulongo is the under simulation of low flow, while the high flows at the Ankoro gauging station are over-simulated. However, the pattern of the calibrated constraint indices in this region (Chapter 8) shows that the under simulation of low flow at Mulongo cannot be attributed to incremental sub-basins (between Bukama, Kapolowe and Mulongo gauging stations), because their Q90/MMQ constraint indices are even slightly above the original constraint ranges, but maintain a spatial consistency with sub-basins of other regions. Similarly, sub-basins located between Mulongo, Luvua and Ankoro gauging stations have high flow indices slightly below the original constraint ranges and therefore they are unlikely to be responsible for the over simulation of high flow at the Ankoro gauging station. These facts highlight the need for a further understanding of the complex wetland system of Kamalondo. Short-term data collection and monitoring programme are required. Important tributaries that drain to this wetland need to be monitored by installing water level loggers and periodically collecting flow data and river bathymetry. This programme should lead to the development of rating curves of wetland input tributaries. This would partially solve the unresolved uncertainty issues at the Ankoro and Mulongo gauging stations. The integrated modelling approach offers many opportunities in the Congo Basin. The quantified and modelled uncertainty helps to identify regions with high uncertainty and allows for the identification of various data collection and management strategies that can potentially contribute to the uncertainty reduction. The quantified channel-wetland exchanges contribute to the improvement of the overall knowledge of water resources estimation within the regions where the effects of wetlands are evident even at the monthly time scale. In contrast, ignoring uncertainty in the estimates of water resources availability means that water resources planning and management decisions in the Congo Basin will continue to be based on inadequate information and unquantified uncertainty, thus increasing the risk associated with water resources decision making. , Thesis (PhD) -- Faculty of Science, Institute for Water Research, 2021
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  • Date Issued: 2021-04

Does the Transkei population of Haliotis Midae at the eastern edge of its distributional range have a higher thermal tolerance than those in more temperate waters?

  • Authors: Mathebula, Surprise
  • Date: 2021-04
  • Subjects: Haliotis midae -- South Africa -- Indian Coast , Abalones -- South Africa -- Indian Coast , Haliotis midae -- Effect of temperature on -- South Africa -- Indian Coast , Haliotis midae -- Physiology -- South Africa -- Indian Coast , Haliotis midae -- Adaptation -- South Africa -- Indian Coast , Haliotis midae -- Growth -- South Africa -- Indian Coast
  • Language: English
  • Type: thesis , text , Masters , MSc
  • Identifier: http://hdl.handle.net/10962/177360 , vital:42814
  • Description: The South African perlemoen abalone (Haliotis midae) may be vulnerable to rising temperatures on the East coast of South Africa due to climate change. H. midae is South Africa’s most valuable aquaculture species, and it is thus important to understand its physiological ability to adapt to the expected changes and to identify possible management measures to mitigate the impacts of rising temperatures. This project aimed to understand thermal tolerance and growth rates of offspring from two H. midae populations originating from the warm-temperate Central region (Port Elizabeth) and warmer Eastern edge of the species’ distribution in the Transkei region. To determine the effects of temperature on the physiological performance of the two abalone populations, growth rates, oxygen consumption rates and critical thermal maxima (CTM) were compared. A laboratory growth trial was conducted at three controlled temperatures, visibly, the ‘optimal’ temperature for H. midae growth (18 - 20℃), ‘pejus’ (stressful) temperature (21 - 22℃) and ‘critical’ temperature (23 - 24℃). Oxygen consumption rates were recorded at optimum (20℃), pejus (22℃) and critical (24℃) temperature using a respirometer. In addition, a farm growth trial with simultaneously spawned cohorts of abalone from the two populations was conducted at ambient temperature (19.5 and 20.0℃). The laboratory growth trial revealed no significant differences in growth rate between the two populations at the three temperature treatments (ANOVA, P > 0.05; df = 2). However, mortalities were high and growth rates low, indicating that the rearing conditions were sub-optimal, possibly masking genetic differences. No significant differences were observed in oxygen consumption rates (ANOVA, P = 0.18; df = 2), and CTM (t-Test, P = 0.31; df = 3) between the two populations. The CTM for both populations was between 29 - 30℃. The farm trial yielded no significant differences in growth rate during the Nursery phase (t-Test, P = 0.25; df = 2), however significant differences in growth rate were observed during the grow out phase with the Central region abalone offspring growing faster than the Eastern edge population (t-Test, P = 0.04; df = 4) indicating the possibility of a genetic difference between the two populations. Further experiments will be required to determine whether the differences observed in the growth trial were genetically or environmentally induced. , Thesis (MSc) -- Faculty of Science, Ichthyology and Fisheries Science, 2021
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  • Date Issued: 2021-04

Perceptions regarding shared value within the South African mining industry

  • Authors: Khubana, Talifhani
  • Date: 2021-04
  • Subjects: Automation , Business planning , Gold mines and mining -- South Africa
  • Language: English
  • Type: Doctoral theses , text
  • Identifier: http://hdl.handle.net/10948/51710 , vital:43365
  • Description: Mining has been a key driver of socioeconomic change, economic growth and environmental impact for decades. However, the industry’s volatility and its negative social and environmental effects are sources of concern. In this context, the study investigated the stakeholders’ perceptions of Shared Value (SV) within the mining industry of South Africa. This included establishing antecedents and outcomes of SV within the South African mining industry. The study also aimed to fill the research gap and contribute to the existing body of knowledge regarding the mining industry and SV in South Africa. The comprehensive literature review in this study included discussion on the overview of the South African mining industry, theories related to SV, theoretical perspectives on SV, and the experiential studies supporting the study’s hypothetical model. The empirical investigation conducted by means of a survey was undertaken under the unprecedented conditions of COVID-19 pandemic. The primary data was statistically examined in six phases: exploratory factor analysis (EFA); Cronbach’s alpha; descriptive statistics; Pearson’s product correlation; and regression analysis. The ANOVA was also conducted to determine the influence of demographic factors on SV perceptions. The empirical results confirmed that automation and innovation (through three pillars, namely, innovation for value chain inclusivity, automation and business model innovation, infrastructure development) and employment conditions are the antecedents of SV. The study illustrated three approaches of SV: reconceiving the product/service and markets, reimagining value chain productivity and development of the enabling environment. Furthermore, the study revealed competitive advantage and sustainability performance as the outcomes of SV. This study makes a notable contribution throughout management and strategy practices as it provides insightful guidelines for stakeholders to understand how to adapt and enforce SV strategies, while empirical results could also be utilised by the government as a guide to formulate policies and strategies relating to the mining industry. , Thesis (DPhil) -- Faculty of Business and Economic Sciences, Business Management, 2021
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  • Date Issued: 2021-04

Performance management system at a public development corporation: success factors and challenges

  • Authors: Saki, David Siphosethu
  • Date: 2021-04
  • Subjects: Gqeberha (South Africa) , Eastern Cape (South Africa) , South Africa
  • Language: English
  • Type: Master's , text
  • Identifier: http://hdl.handle.net/10948/52935 , vital:44733
  • Description: Public sector organisations often lack effectiveness in the implementation of an organisational strategy and seek out means of utilising a performance management system to ensure the productive implementation of its strategy (Auditor General South Africa, 2017). Therefore, it is important for organisations to utilise tools and techniques to ensure that the performance management system is efficiently implemented. Performance management is defined as a strategic and integrated approach aimed at delivering sustained success by using tools and techniques to improve the performance of people by developing the capabilities of teams and individual contributors (Armstrong, 2006). The main purpose of the study was to identify success factors that contributed to the effective implementation of a performance management system and then determine the extent to which these factors have been successfully incorporated in the performance management system at the CDC. The literature review was conducted, highlighting the process of performance management, tools and techniques, success factors and challenges in order to effectively implement a performance management system. In this study, a positive correlation between the PM purpose, success factors and tools revealed that the various success factors in relation to systems, resources, staff and measurement linked with the PM purpose. In addition, it was also revealed that the human resources component was considered as very important in driving an effective performance management system. , Thesis (MA) -- Faculty of Business and Economic Sciences, Human Resources Management, 2021
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  • Date Issued: 2021-04

Effects of different levels of education and government spending on economic growth

  • Authors: Malangeni, Luxolo Mihle
  • Date: 2021-04
  • Subjects: Southern African Development Community , Economic development -- Africa , Economics -- Africa
  • Language: English
  • Type: Master's theses , text
  • Identifier: http://hdl.handle.net/10948/51842 , vital:43377
  • Description: This study investigates the impact of the level of education and education spending on economic growth in the Southern African development community (SADC) using annual panel data from 1995 to 2017 using the FMOSLS and DOLS cointegration estimators. Three levels of education are identified in study (primary, secondary and tertiary). Moreover, we create an index of government spending on education corresponding to these three levels of education. The empirical results suggest that there is a positive long-term relationship between secondary education and economic growth but not for other levels of education. Moreover, it is found that only government spending at primary and secondary education contribute to economic growth. The causality analysis for confirm that only secondary education affects economic growth and is affected by government spending on education. Policy implications of the study are discussed. Government should be careful in managing the public spending on education in a way to increase the skilled labor. Education Policies must be drive based on principle. Professional schools must be first priority in education policies in the region. Government should direct the public expenditures on education towards productive sectors that will contribute in improving the standard of living contributing so on economic growth. , Thesis (MCom) -- Faculty of Business and Economic Sciences, Economics, 2021
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  • Date Issued: 2021-04

The Effect of Using English as A Language of Learning and Teaching on Learner Academic Performance in Senior Phase of Mthatha, Eastern Cape Province

  • Authors: Seabela, Marcia Motlatso
  • Date: 2021-04
  • Subjects: teaching strategies
  • Language: English
  • Type: Doctoral theses , text
  • Identifier: http://hdl.handle.net/11260/6782 , vital:49059
  • Description: The study sought to investigate the effect of using English as a language of learning and teaching on learner academic performance in the senior phase of Mthatha District, Eastern Cape Province. This study employed a mixed-method approach. The researcher used both qualitative and quantitative methods to collect data. The study was conducted in 3 semi-rural senior secondary schools that were conveniently selected. The quantitative part employed Likert-type scale questionnaires that were administered to 10 Mathematics (Math), 10 Natural Sciences (NS) and 10 Social Sciences (SS) teachers making a total of 30 teachers and a total of 30 learners from grades 8 and 9. For the qualitative part, nine (9) teachers and eighteen (18) learners from the selected schools were interviewed. The 18 teachers in three schools were observed as they taught Grade 8 and 9 learners in their respective classes. Qualitative data were, thus, gathered through interviews and observations. Quantitative data was collected using Likert-type scale questionnaires and was analysed using descriptive statistics and Microsoft Excel. The voice recorded qualitative data from the participant’s responses were transcribed and analysed manually through coding, forming categories and themes that were used for data presentation. These are some of the findings: The majority of learners do not understand English, therefore, it was difficult for them to understand the teaching and learning of the selected subjects in Senior Phase (SP) using English as the language of learning and teaching (LoLT); Although the majority of learners reported that they usually use English as a LoLT and their home language when learning the selected subjects, they still struggled to ask and answer questions in English in a classroom and during examinations; Learners who experience difficulties in learning the selected subjects through the use of English as a LoLT in SP, were taught in their home language (isiXhosa) by their teachers; English and isiXhosa, in the form of code-switching, were used when teaching the selected subjects; Inadequate teacher training and preparation made it more difficult for the learners to perform well in the selected subjects. The study recommends that: The Department of Education should conduct enough workshops to help HOD’s and teachers who teach the selected subjects to keep abreast of new developments in these subjects. These should be integrated with appropriate teaching strategies and learning and teaching support materials. Keywords: English as the language of learning and teaching, teaching strategies, learning, teaching support materials. , Thesis (D.Ed) -- Faculty of Education Sciences, 2021
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  • Date Issued: 2021-04

The impact of financial inclusion and institutional quality on economic growth in the BRICS and MINT countries

  • Authors: Matiso, Sibahle
  • Date: 2021-04
  • Subjects: BRIC countries , BRIC countries -- Foreign economic relations. , Economic development -- Developing countries
  • Language: English
  • Type: Master's theses , text
  • Identifier: http://hdl.handle.net/10948/51873 , vital:43380
  • Description: The purpose of this study was to assess the relationship between Financial Inclusion, institutional quality, and economic growth in the Brics and Mint emerging economies. Taking six different indicators of financial availability, accessibility and usability, this paper constructed a single financial inclusion index using an approach developed by Sarma (2008). Similarly, taking six governance indicators and five economic freedom indicators we constructed a single Institutional quality index using the Principal Component Analysis (PCA) method. Thus, using data that spans from 2004 to 2018 we tested the relationship between these two indexes and Economic growth using the Pooled Mean Group (PMG) econometric model. The empirical results showed that there is indeed a positive and significant simultaneous effect of financial Inclusion and Institutional quality on Economic growth in the Brics and Mint emerging economies. This positive relationship between these variables suggests that government agents and policymakers in the Brics and Mint countries need to come up with strategies that will help build efficient state institutions and enhance financial inclusion as these are suitable instruments for the promotion of sustainable future growth and the upliftment of the welfare of their citizens. , Thesis (MCom) -- Faculty of Business and Economic Sciences, Economics, 2021
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  • Date Issued: 2021-04

An assessment of risk management in a State-Owned Enterprise (SOE): a case of Transnet engineering

  • Authors: Mnyiphika, Aphiwe
  • Date: 2021-04
  • Subjects: Gqeberha (South Africa) , Eastern Cape (South Africa) , South Africa
  • Language: English
  • Type: Master's theses , text
  • Identifier: http://hdl.handle.net/10948/53009 , vital:44868
  • Description: State-owned enterprises are facing several challenges. The challenges are associated with several risks in the business environment. Risk management has become increasingly important in the day to operations of any enterprise. This study is conducted to assess risk management implementation and execution within a state-owned enterprise (SOE). The main reason behind this research is that very little is known about risk management in the SOE sector in South Africa, as can be seen by the perpetual failure of these organisations. Therefore, this research focused on assessing the implementation and execution of risk management at Transnet Engineering because it continues to suffer losses as a result of “state capture”. The study sought to find out the role of organisational culture on the adoption of risk management in a state-owned enterprise. the main objectives of the research focused on the impact of commitment on the adoption of risk management in a state-owned enterprise; the function of implementation on the adoption of risk management in a state-owned enterprise; and the impact of monitoring on the adoption of risk management in a state-owned enterprise. A qualitative research methodology was utilised to attain results for these research objectives.The areas focused on Transnet Engineering with it regions and excluded other subdivisions of Transnet such as Transnet National Ports Authority, Freight rail, Port Terminals Pipelines and Properties. Convenience sampling was used to select 10 appropriate participants who were willing to provide the needed information to furnish the study’s findings. Interviews were utilised to collect data for this study. The data that was collected in this study was analysed using thematic analysis. The main findings of this study show that the organisational culture of Transnet Engineering is not enhancing the adoption and implementation of Enterprise Risk Management (ERM). , Thesis (MBA) -- Faculty of Business and Economic Sciences, NMMU Business School, 2021
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  • Date Issued: 2021-04

A Psychobiographical Study of Charles Manson

  • Authors: Flatela, Sambesiwe
  • Date: 2021-04
  • Subjects: Psychology -- Biographical methods , Personality development -- Psychological aspects , Criminals -- United States -- Biography
  • Language: English
  • Type: Master's theses , text
  • Identifier: http://hdl.handle.net/10948/51021 , vital:43201
  • Description: Charles Manson was notorious for his antisocial behaviour and influence; through his charisma, he formed a group of followers known as the Manson family. Manson and his followers became involved in various criminal activities which culminated in the murder of 7 people. These murders were not committed by Manson per say, but he planned them, and incited his followers to commit them; this resulted in a trial and Manson going to prison, being given a life sentence. He continued to influence people while he served his sentence in prison. Manson died of natural causes in November 2017. The research study explores and describes the life of Manson in the form of a psychobiography. The aim of the study was to gain insight into the personality development of Charles Manson. This was achieved by applying Otto Kernberg’s Object Relations Theory to Manson’s known life experiences. Various data was collected and triangulated, using primary and secondary sources. Miles, Huberman, and Saldana’s (2013) three step procedure was used to analyse the data. The findings highlight the influence of genetics and rejection as pivotal to the unfolding of Manson’s personality, and provide insight into how his antisocial patterns unfolded. They highlight, in particular, his use of control, dominance and devaluation to protect his positive experience of self. , Thesis (MA) -- Faculty of Health Sciences, Department of Psychology, 2021
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  • Date Issued: 2021-04

The development of an ionospheric storm-time index for the South African region

  • Authors: Tshisaphungo, Mpho
  • Date: 2021-04
  • Subjects: Ionospheric storms -- South Africa , Global Positioning System , Neural networks (Computer science) , Regression analysis , Ionosondes , Auroral electrojet , Geomagnetic indexes , Magnetic storms -- South Africa
  • Language: English
  • Type: thesis , text , Doctoral , PhD
  • Identifier: http://hdl.handle.net/10962/178409 , vital:42937 , 10.21504/10962/178409
  • Description: This thesis presents the development of a regional ionospheric storm-time model which forms the foundation of an index to provide a quick view of the ionospheric storm effects over South African mid-latitude region. The model is based on the foF2 measurements from four South African ionosonde stations. The data coverage for the model development over Grahamstown (33.3◦S, 26.5◦E), Hermanus (34.42◦S, 19.22◦E), Louisvale (28.50◦S, 21.20◦E), and Madimbo (22.39◦S, 30.88◦E) is 1996-2016, 2009-2016, 2000-2016, and 2000-2016 respectively. Data from the Global Positioning System (GPS) and radio occultation (RO) technique were used during validation. As the measure of either positive or negative storm effect, the variation of the critical frequency of the F2 layer (foF2) from the monthly median values (denoted as _foF2) is modeled. The modeling of _foF2 is based on only storm time data with the criteria of Dst 6 -50 nT and Kp > 4. The modeling methods used in the study were artificial neural network (ANN), linear regression (LR) and polynomial functions. The approach taken was to first test the modeling techniques on a single station before expanding the study to cover the regional aspect. The single station modeling was developed based on ionosonde data over Grahamstown. The inputs for the model which related to seasonal variation, diurnal variation, geomagnetic activity and solar activity were considered. For the geomagnetic activity, three indices namely; the symmetric disturbance in the horizontal component of the Earth’s magnetic field (SYM − H), the Auroral Electrojet (AE) index and local geomagnetic index A, were included as inputs. The performance of a single station model revealed that, of the three geomagnetic indices, SYM − H index has the largest contribution of 41% and 54% based on ANN and LR techniques respectively. The average correlation coefficients (R) for both ANN and LR models was 0.8, when validated during the selected storms falling within the period of model development. When validated using storms that fall outside the period of model development, the model gave R values of 0.6 and 0.5 for ANN and LR respectively. In addition, the GPS total electron content (TEC) derived measurements were used to estimate foF2 data. This is because there are more GPS receivers than ionosonde locations and the utilisation of this data increases the spatial coverage of the regional model. The estimation of foF2 from GPS TEC was done at GPS-ionosonde co-locations using polynomial functions. The average R values of 0.69 and 0.65 were obtained between actual and derived _foF2 over the co-locations and other GPS stations respectively. Validation of GPS TEC derived foF2 with RO data over regions out of ionospheric pierce points coverage with respect to ionosonde locations gave R greater than 0.9 for the selected storm period of 4-8 August 2011. The regional storm-time model was then developed based on the ANN technique using the four South African ionosonde stations. The maximum and minimum R values of 0.6 and 0.5 were obtained over ionosonde and GPS locations respectively. This model forms the basis towards the regional ionospheric storm-time index. , Thesis (PhD) -- Faculty of Science, Physics and Electronics, 2021
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  • Date Issued: 2021-04

Integrating Indigenous Ugandan social ethics into an education foundations curriculum: teacher educator’s perspectives

  • Authors: Nampijja, Florence Kirabo
  • Date: 2021-04
  • Subjects: Indigenous peoples – Education--Africa , Decolonization Africa-Uganda , Curriculum change
  • Language: English
  • Type: Doctoral theses , text
  • Identifier: http://hdl.handle.net/10948/53552 , vital:45436
  • Description: The research claims that curriculum in Uganda is too westernized to the extent that indigenous Ugandan social ethics which informed pre- colonial curriculum have been totally neglected. Consequently, there are many learned but few socially educated persons in the country. Findings highlighted that teacher educators supported the integration of relevant indigenous knowledges into curriculum because indigenous knowledge is directly linked to the environment within which Ugandan students live, studies and operates after studies. They also believed that IUSEs provides a bedrock for professional conduct to flourish and thus, must be treated as an important component of the curriculum. However, though participants acknowledged the advantages of integrating IUSE into curriculum, they identified a number of obstacles to the integration of IUSEs. For instance: lack of consensus of IUSEs among the fifty-six tribes in Uganda; lack of support by the civil service deployment policy. Some confessed to the lack of adequate knowledge about IUSEs; the feeling of cognitive imperialism that is still possessed by some teacher educators and others. Among the strategies to be used for successful integration, teacher educators highlighted the need for collaborative efforts among all stakeholders, adopting the use of local languages as a medium of instruction and others. Data also revealed that the EFC currently aims at professional mentorship and giving employable skills to the students. The Such a situation manifests itself in the degeneration of ethical values by many Ugandans. This study examined teacher educators’ perspectives on integrating IUSEs in an Education Foundations curriculum (EFC). I used the decolonization theory, anti-colonial theory and indigenous knowledge discursive framework as lenses that framed the study. The findings from the study have implications for formulation of an education philosophy that is anchored in a national philosophy should be designed to guide curriculum designers in Uganda. The study further recommended that NCHE should compel all universities to integrate IUSEs into curriculum treating IUSEs as part of the minimum standards that must be satisfied before program accreditation. , Thesis (PhD) -- Faculty of Education, 2021
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  • Date Issued: 2021-04

The role of stakeholders in developing entrepreneurs in the bunkering industry: the case of Nelson Mandela Bay

  • Authors: Yibe, Luthando
  • Date: 2021-04
  • Subjects: Oil transfer operations -- South Africa -- Nelson Mandela Bay Municipality , Small business -- South Africa -- Nelson Mandela Bay Municipality
  • Language: English
  • Type: Master's theses , text
  • Identifier: http://hdl.handle.net/10948/54849 , vital:48033
  • Description: In July 2014 the South African government launched an oceans economy growth and development program called Operation Phakisa: Ocean Economy. The oceans economy is one of the sectors that is identified by the South African government where entrepreneurship can play a meaningful role in contributing to South Africa’s economic growth. Shipping is regarded as a critical operation within the export and import activities of any country . About 30 000 vessels sail along the coast of South Africa each year and approximately 13 000 vessels visit South African ports annually. Bunker replenishment is identified as a critical component within the operation of ships. In 2016 the first offshore bunkering operations were in launched in the Nelson Mandela Bay ports to revitalise the bunkering business. The aim of the study is to provide insight into how entrepreneurs can recognise value in business models, the application of the business model framework and how stakeholders can play a role in developing entrepreneurs in the bunkering sector. A survey using interviews was conducted amongst key stakeholders in the bunkering industry in the Nelson Mandela Bay region. Six themes were formulated, and these themes formed the basis of the interview structure. The themes focused amongst on challenges faced by entrepreneurs, access to funding, impact of industry regulations, government programmes and support available to entrepreneurs and the application of business model and innovation. The findings revealed that whilst Small Medium Enterprises faced several challenges in entering the industry, the support provided by key stakeholders and the application of a business model is key if entrepreneurs are to be successful in the bunkering industry. , Thesis (MBA) -- Faculty of Business and Economic Sciencess, 2021
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  • Date Issued: 2021-04
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