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The role of small-scale squid fisheries in sustaining livelihoods and maintaining marine resources in the context of climate change

  • Authors: Mkaza, Oyamangaye
  • Date: 2020
  • Subjects: Squids -- Presevation , Climate Change -- South Africa
  • Language: English
  • Type: Thesis , Masters , MA
  • Identifier: http://hdl.handle.net/10948/50382 , vital:42158
  • Description: Small-scale fisheries depend on the ocean as a source of social and economic benefit for the world’s population, especially in developing countries. Coastal communities face challenges in ensuring that fisheries are sustainable and resilient to the effects of climate change. The collapse of small-scale squid fisheries in South Africa in 2013-2014 raised concerns in South Africa’s fishing industry, leading to various studies that focused on the marine environment. Small-scale fisheries are important in terms of their contribution to various national economies, job creation for coastal communities and the sustainability of human existence. Society needs a detailed knowledge of the living components of natural and managed systems, as global climate changes affect the functions of ecosystems and consequently the well-being of humans. A qualitative research approach using unstructured interviews with participants was appropriate for this study. This approach gave an opportunity for participants to explain their views and provide an in-depth understanding of their social phenomena. The significance of this study is that it broadens knowledge and understanding of how small-scale fishers respond and become resilient to climate change, shocks and other risks that affect social and ecological systems negatively and assists in forecasting the likelihood of a future collapse of the fishing industry. The study’s results indicate that squid fishers’ local knowledge supports the view that there are changes in the squid stocks, with fishers detailing the changing weather patterns and climatic conditions. The squid fishers identified unsustainable fishing practices that damage the spawning areas as a problem area. There was a general concern amongst the limited number of interviewees that the future of their livelihood was in peril and changes had to be made. Local knowledge and the perceived desire to care for the environment are important for managing squid resources and fostering communities’ resilience to climate change.
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  • Date Issued: 2020

The role of the expanded public works programme in reducing unemployment in Grahamstown

  • Authors: Adam, Zanele
  • Date: 2020
  • Subjects: Poverty Alleviation -- South Africa -- Grahamstown
  • Language: English
  • Type: Thesis , Masters , MA
  • Identifier: http://hdl.handle.net/10948/49583 , vital:41738
  • Description: Unemployment is a global threat and has been identified as a crucial factor affecting South Africa s economy. Unemployment rate is one of the key indicators of South Africa s economy and reports by Statistics South Africa have indicated an increase in the unemployment rate. Studies done by the International Labour Organisation (ILO) has ranked South Africa amongst the worst in the world for unemployment and that poverty manifests not as a financial indicator but as a result of lack of employment opportunities. In response to the challenge of unemployment, South Africa has introduced numerous policies and strategies to combat unemployment and alleviate poverty. The vision of the Expanded Public Works Programme (EPWP) is to assist South Africa with its challenge of poverty eradication and to ease the unemployment statistics while simultaneously promoting skills development for its participants and the main focus of this policy is to provide income relief for the unemployment. The aim of this research was to assess the impact of EPWP in alleviating unemployment in Grahamstown, by assessing whether or not the EPWP has had any significant influence on job creation and skills development. This study focused on programmes implemented during the period 2014-2017 which is under phase 3 of the EPWP. This study adopted a qualitative research method and followed a descriptive approach. The research method did not seek to prove a true cause-effect relationship between the variables but rather demonstrate the correlation by means of case studies, archival research and content analysis. The research results revealed the potential of the EPWP projects in job creation in the area, and that there are areas of development and challenges in order to achieve the overall purpose of the EPWP.
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  • Date Issued: 2020

The spatiotemporal aspects of predation on the Cape gannet Morus capensis population at the Lambert’s Bay gannet colony, Western Cape, South Africa

  • Authors: Schoeman, Zanri
  • Date: 2020
  • Subjects: Sea birds -- South Africa -- Western Cape
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: http://hdl.handle.net/10948/47656 , vital:40262
  • Description: Seabirds are one of the most threatened groups of birds with 29% of seabird species at some risk of extinction. As a result of multiple human-induced threats, seabird species including the Cape gannet Morus capensis which is endemic to southern Africa population experience significant declines and is now classified as Endangered. The Cape gannet faces predation threats from a variety of different species. The current predators of concern at Lambert’s Bay gannet colony are both the Cape fur seal Arctocephalus pusillus pusillus and the Kelp gull Larus dominancus. The former predates on fledglings and the latter predates on eggs. In the 2005/06 breeding season the entire Cape gannet population deserted the Lambert’s Bay gannet colony due to predation by the Cape fur seal. Although the Cape gannets have subsequently recovered to approximately 8000 pairs, seal predation on Cape gannet fledglings continues, together with predation by Kelp gulls. This has caused concern over the impact of predation on this species at the Lambert’s Bay colony, particularly given the species’ conservation status, its small breeding range and its current population trend. CapeNature, the conservation agency involved at this colony has been monitoring and managing the predation on Cape gannets and are interested in evaluating the success of their efforts. Therefore the aim of this study was to determine the spatial and temporal aspects of predation on the Cape gannet population at Lambert’s Bay gannet colony. When examining the influence of fish availability on predation intensity, we found that in years with an increase in fish biomass there was a decrease in predation probability by Cape fur seals. This increase in fish biomass not only led to decreased predation on the fledglings it also led to increased breeding success of the Cape gannets. In determining the effect of predation within the Cape gannet breeding colony we found that the probability of predation by Kelp gulls decreased in years with increased adult gannet density. Indirectly, Cape gannet population growth should lead to a decrease in Kelp gull predation as a higher gannet density increases the risk of injury to the Kelp gulls. This suggests that if Cape gannet populations continue to decline, they may become increasingly vulnerable to Kelp gull predation which can result in a further population decline. In terms of past management actions, the selective culling of predatory Cape fur seals and Kelp gulls, was evaluated. It was found that in the years in which culling of Cape fur seals and Kelp gulls was implemented, a decrease in predation was observed. This indicated that culling reduced predation in the short-term. Predation is inevitable, but due to the Cape gannet’s conservation status we suggest that additional, long-term, and more sustainable methods to reduce predation should be explored. Our research emphasises the need for improving food availability to Cape gannets as food security is paramount to their long-term survival and population growth. Colony management in isolation from other management strategies, is not efficient for conserving a species. We therefore suggest that sound management of predation at the terrestrial habitats are required but that effective management of fisheries are also required for the successful conservation of the Cape gannet. Food security for Cape gannets could be improved by, for example, establishing some ways that we suggest improving the food security for Cape gannets would be to establish Marine Protected Areas (MPAs) with dynamic boundaries around Cape gannet colonies, and to have locate the MPAs close to breeding and foraging hotspots where these areas are closed to fishing thus reducing the competition between commercial fisheries and marine predators, such as the Cape gannet. Another way to improve food security for the gannets are to promote the efforts of focussing on developing and implementing an ecosystem approach to fisheries management in which fishing quotas account for the needs of marine predators. The findings of this study have not only aided the understanding of the dynamics of predation on the Cape gannets and highlighted the extent that predation takes place on them but can also guide future management decisions regarding predation on this endemic and endangered species.
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  • Date Issued: 2020

The taxonomic status of dolphins Tursiops spp. and Delphinus in South African waters

  • Authors: Ngqulana, Sibusisiwe Gloria
  • Date: 2020
  • Subjects: Dolphins -- Classification -- South Africa
  • Language: English
  • Type: Thesis , Doctoral , PhD
  • Identifier: http://hdl.handle.net/10948/48566 , vital:40891
  • Description: There is a need for identifying important sites, taxonomic units or populations and the usual criterion used is species identification. The species is the most important taxonomic unit to define in taxonomy, as it is the primary unit of concern in biodiversity, conservation and other biological issues. Thus, taxonomy plays an important role in conservation biology. Additionally, taxonomy can contribute to the development of analytical systems that will provide information on priorities for reaching defensible targets for established conservation. This poses a problem for cetaceans as basic information is frequently deficient and therefore not suitable for conservation planning purposes. This leads to difficulties in identifying and prioritizing areas for the monitoring, management and for the protection of species or populations. Morphological and geographic data used to be the primary means used by taxonomists to define species and subspecies, and due to this, most extant species have been classified by morphological characteristics. However, in the recent years, molecular analyses have been introduced and subsequently stable isotopes were also included to assist in interpreting results. Thereafter, it became a common approach to use more than one technique or a combination of independent datasets to resolve taxonomic uncertainties. This has resulted to a proposed term known as integrative taxonomy. Integrative taxonomy has recently been used in most studies that deal with taxonomy or population structure. The use of multiple lines of evidence, which is sometimes referred to as integrative taxonomy, raises the level of confidence in clearly delineating species. Cetaceans are the most taxonomically diverse group of aquatic mammals, with 93 living species accepted. Previously, their taxonomy was based on morphological characters. However, cetaceans have recently been subjected to intense phylogenetic investigations using both morphological and molecular data. These problems are not only prevalent in larger whales, but the small toothed whales also have these challenges, particularly family Delphinidae. This family is known to be the most diverse among the toothed whales. This is because this family diverged recently, and the divergence occurred relatively fast. This study aimed to clarify the taxonomic status of Tursiops spp. and Delphinus in the family Delphinidae, inhabiting the South African waters, using a combination of morphological and molecular methods. For skull morphology, geometric morphometrics were used, while for molecular methods, the D-loop region in the mitochondrial DNA was used to detect any differences within each genus. For the genus Tursiops, this study showed the consistency of results in all analyses used to investigate the presence of two species in the genus Tursiops in South African waters. This study only analysed sequences from the mitochondrial D-loop region and has re-confirmed the presence of the two species in South Africa. Skull and external morphology both show T. truncatus to be bigger and more robust, and to have a shorter rostrum compared with T. aduncus. These external observations are helpful when identifying the species in the field. Providing evidence supporting the presence of two Tursiops species in South Africa does not only contribute to the global context of the taxonomy of this genus, but also in the local context. This study also gives insight on the distribution of the two species in the region. For the genus Delphinus, molecular analysis did not reveal any clustering in South African Delphinus specimens, which suggested a single species, D. delphis, and that this species is morphologically highly variable. Both skull and external morphology did not reflect the molecular results, supporting suggestions that morphology in this genus does not reflect genetic differences. It has been shown that morphological variation reflects feeding specialization rather than speciation. This may also reflect local adaptations. Both skull and external morphology in this study showed no significant differences. This study did not investigate the phylogeographic details of the species in South Africa and further molecular work including a larger sample size from the west coast of South Africa is needed. By attempting to unravel the taxonomy of these dolphins in South African waters, the findings of this study will be very useful in the development of effective conservation and management strategies for these dolphins.
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  • Date Issued: 2020

The use of drawing to support teaching and learning of an additional language in foundation phase classrooms

  • Authors: Macubeni, Sandiswa
  • Date: 2020
  • Subjects: Language and languages -- Study and teaching -- Foreign speakers
  • Language: English
  • Type: Thesis , Masters , MEd
  • Identifier: http://hdl.handle.net/10948/49351 , vital:41676
  • Description: Parents in South Africa have been given the privilege and right to choose the language of learning and teaching (LoLT) for their children. However, because of the advantages associated with fluency in English, parents tend to choose English as the language of instruction, often without being informed as to the disadvantages of learning in an additional language. The use of an additional language as the main language of instruction can potentially negatively affect the academic performance of learners, as they are often unable to express themselves efficiently and comprehend instructions given in this additional language. In an effort to assist learners who may be struggling with learning in an additional language, this study explored the use of drawing to support the teaching and learning of an additional language in Foundation Phase classrooms. A qualitative approach was adopted in order to gain insights of Foundation Phase teachers regarding the use of drawing to promote the teaching and learning of English as an additional language. The methods that were used to elicit data in this study included focus groups, an open-ended questionnaire, field notes, reflective journal entries, and document analysis. The participants in this research were 18 Foundation Phase teachers from a school in the Northern Areas of Port Elizabeth. The collected data were analysed using thematic analysis. The findings of this study revealed that drawing is both an expressive and receptive visual language that has the potential to promote the teaching and learning of an additional language. However, for this additional language to be effective, teachers should create a stimulating environment and encourage learners to use this language in their classrooms. Teachers should also find creative ways to accommodate drawing within their planned teaching and learning activities in the classroom.
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  • Date Issued: 2020

The validity of dismissals for refusing to accept changes to terms and conditions of employment

  • Authors: Bosch, Lauren
  • Date: 2020
  • Subjects: Employees -- Dismissal of -- Law and legislation
  • Language: English
  • Type: Thesis , Masters , LLM
  • Identifier: http://hdl.handle.net/10948/47336 , vital:39848
  • Description: Operational circumstances often create the need for employers to change the employment conditions of employees. Such conditions can include difficulty in obtaining raw materials which may require employees to do different work, a takeover or a merger, market shifts, orders from clients, an increase or reduction in work volumes, new technology, or even in some instances skill shortages. Regardless of the reason, in order to allow the business to remain operational, employers are often obligated to change terms and conditions of employment. Section 187 of the Labour Relations Act 66 of 1995 deals with automatically unfair dismissals and lists a number of reasons for dismissal that, if it complies with the requirements listed, the dismissal will be found to be automatically unfair. The definition was amended by the Labour Relations Amendment Act 6 of 2014 as a result of the courts incorrectly interpreting this section in Chemical Workers Industrial Union (CWIU) v Algorax (Pty) Limited (2003 11 BLLR 1081) (Algorax) and Fry's Metals (Pty) Limited v National Union of Metal Workers of South Africa and Others (JA9/01) [2002] ZALAC 25 (Fry’s Metals). Section 187(1)(c) of the LRA has always been contentious due to the fact that the definition of automatically unfair dismissals, employers’ rights to terminate contracts of employment on the basis of operational requirements and the institution of collective bargaining are intertwined. The Labour Relations Amendment Act of 2014 brought about significant changes to how section 187(1)(c) should be interpreted and fundamentally changed the enquiry that should be adopted when determining cases of this nature. The main aim of this study is to provide clarity to the question of when will it be valid and fair for an employer, in the course of restructuring his business, to dismiss any of his employees who refuse to accept the proposed changes to the terms and conditions of their employment.
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  • Date Issued: 2020

Towards decolonizing a local university’s business school’s masters in business administration

  • Authors: Du Preez, Daniella
  • Date: 2020
  • Subjects: Decolonization -- Education (Higher) -- Curricula
  • Language: English
  • Type: Thesis , Masters , MBA
  • Identifier: http://hdl.handle.net/10948/47735 , vital:40330
  • Description: 2015 marked the year students went to great lengths to call on Higher Education institutions and their educators for a decolonised curriculum. This behaviour is attributable to the conditions that they had do study in. Buildings and campuses have colonial names, lectures mostly include White people’s intellectual contributions. Colonialism included colonial knowledge and denied African practices and existence. For centuries African philosophy was excluded and marginalised, which caused much pain and inhumanity. Higher education institutions remain detached from the developmental changes of African communities. Silence in academic disciplines was overwhelming Eurocentric / Westernised. Transformation of Higher Education curriculum in South Africa requires inclusion of African philosophy, and acknowledgement and respect for other cultures’ values, languages and knowledge. Educators play a pivotal role in transferring knowledge to students and producing the leaders for the future. Colonisation has ruled for decades and the effects thereof are still felt in various aspects of life. The education platform can break colonialism and if allowed, bring restoration to indigenous people. South African universities can contribute to society in transforming and decolonising curriculum and giving indigenous people and knowledge their rightful place. An education system free from colonialism positions students to add value to society as their worldviews are taken into consideration. This paper investigates the factors that could lead to a decolonised curriculum. Higher Education institutions have a role to play in ensuring a University free form colonial power and inequality. Decolonisation of the intellectual landscape will result in the decolonisation of the mind.
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  • Date Issued: 2020

Towards the synthesis of trimethoprim using continuous flow Chemistry

  • Authors: Ngwenya, Sandiso
  • Date: 2020
  • Subjects: Trimethoprim
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: http://hdl.handle.net/10948/47475 , vital:39994
  • Description: The continuous flow synthesis of trimethoprim, an antibiotic, was investigated in this study from simple commercially available reagents, such as aniline and dimethylamine. The first step of the synthesis involves a highly exothermic Michael reaction, between acrylonitrile and dimethylamine; process intensification through miniaturization provides a safe and efficient method of synthesis through the use of microreactors. This is afforded by their large surface area-to-volume ratio; one of the many characteristics of continuous flow synthesis that allows for rapid heat dissipation allowing for exothermic reaction to be conducted safely at ambient or higher temperatures. This study was optimized on a Chemtrix Labtrix® Start unit using a Chemtrix reactor achieving a conversion of 99% in 12 sec residence time at 25oC. Subsequently the base catalyzed condensation of the intermediate with 3,4,5- trimethoxybenzaldehyde was investigated using Little Things Factory reactors (Channel diameter: 1.0mm). Maximum conversion (100%) was obtained at 80oC in 20 mins. Due to the poor cyclisation observed with this intermediate, according to literature findings, the 3-dimethylamino group was substituted for aniline. The optimisation for this acid catalysed substitution reaction was performed on a homemade PTFE tubing reactor (Diameter: 0.5mm) and it was found that at 120oC in 10 mins residence time a conversion of 97% was obtained. From the results obtained, an investigation into an integrated process for the condensation and substitution reaction was done using the Little Things Factory system (Channel Diameter: 1.0mm) coupled with a homemade PTFE coil reactor (Diameter: 0.5mm). This process, under optimum conditions of temperature 80oC and residence time of 30 mins, attained a conversion of 76%.
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  • Date Issued: 2020

Ultra-high precision diamond turning of advanced contact lens polymers

  • Authors: Liman, Muhammad Mukhtar
  • Date: 2020
  • Subjects: Contact lenses , Electrostatic lenses Lenses -- Design and construction
  • Language: English
  • Type: Thesis , Doctoral , PhD
  • Identifier: http://hdl.handle.net/10948/46108 , vital:39496
  • Description: Contact lens polymer-based materials are extensively used in the optical industry owing to their excellent corrosion resistance, the possibility of mass production and their ability to be processed without external lubrication. Owing to the fast growth in optical industries, contact lens (CL) requires high accuracy and a high surface quality. The demand for high-accuracy and minimal surface roughness drives the development of ultra-high precision machining technology with regard to single point diamond turning (SPDT). Ultra-high precision diamond turning is an advanced manufacturing technique employed in the machining of CLs owing to its capability of producing high optical surfaces with complex shapes and nanometric accuracy. Yet, even with the advances in ultra-high precision machining (UHPM), it is not continuously easy to achieve a highquality surface finish during polymers machining as the adhesion of the tool chip around the tool dictates the presence of electrostatic charges. The electrostatic charges encountered by a cutting tool when turning advanced CLs are important as they reflect the quality and condition of the tool, machine, fixture, and sometimes even the finished surface, which is responsible for tool wear and poor surface quality. This study investigates the role of cutting parameters, namely cutting speed, feed rate and depth of cut on surface roughness (Ra), electrostatic charge (ESC) and material removal rate (MRR), which determines machine economics and the quality of machining contact lens polymers. The experiments were mainly conducted on two different advanced polymeric materials: polymethyl methacrylate (PMMA) and Optimum Extreme (Roflufocon E) CLs. Experimentation was carried out on the Nanoform 250 ultra-grind turning machine with a monocrystalline diamond-cutting tool for machining the PMMA and Roflufocon E CL polymers, covering a wide range of machining parameters. Before conducting the experiments, a design of experiment was conducted according to the response surface methodology (RSM) that is based on the Box-Behnken Design (BBD). In addition, the research study focused on the determination of the optimum cutting conditions leading to minimum Ra and ESC as well as maximum productivity in the SPDT of the PMMA and Roflufocon E CL polymers, using a monocrystalline diamondcutting tool. The optimization was based on RSM together with the desirability function approach. In addition, a mathematical model was developed for Ra, ESC and MRR using a RSM regression analysis for PMMA and Roflufocon E CL polymers by means of Design Expert software. RSM allowed for the optimization of the cutting conditions for minimal Ra and ESC as well as maximal MRR, which provides an effective knowledge base for process parameters to enhance process performance in the SPDT of CL polymers. Furthermore, this study also deals with the development of Ra, ESC and MRR prediction models for the diamond turning of PMMA and Roflufocon E CL polymers, using the fuzzy logic based artificial intelligence (AI) method. The fuzzy logic model has been developed in terms of machining parameters for the prediction of Ra, ESC and MRR. To judge the accuracy and ability of the fuzzy logic model, an average percentage error was used. The comparative evaluation of experiments and the fuzzy logic approach suggested that the obtained average errors of Ra, ESC and MRR using the fuzzy logic system were in agreement with the experimental results. Hence, the developed fuzzy logic rules can be effectively utilized to predict the ESC, Ra and MRR of PMMA and Roflufocon E CL polymers in automated optical manufacturing environments for high accuracy and a reduction of computational cost. Moreover, owing to the brittle nature of optical polymers, the Roflufocon E CL polymer requires ductile-mode machining for improved surface quality. Molecular Dynamics (MD) simulation methods are thus applied to investigate the atomistic reaction at the tool/workpiece surface to clearly study and observe conditions occurring at nanometric scale in polymer machining. This research study is particularly concerned with the comparative analysis of experiments and a MD study of the Roflufocon E optical polymer nano cutting approach to the atomistic visualization of the plastic material flow at the tool/workpiece interface during cutting. The simulated MD acting force, machine stresses, and the temperature at the cutting region were evaluated to access the accuracy of the model. Hence, the nanomachining simulations were found to have a correlation to the experimental machining results.
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  • Date Issued: 2020

Understanding the relationship between mangrove composition, stand dynamics and resource use in the Ntafufu estuary, Eastern Cape, as basis for sustainable resource use

  • Authors: Mvakade, Monica , Rajkaran, Anusha
  • Date: 2020
  • Subjects: Estuarine ecology -- South Africa -- Eastern Cape , Aquatic ecology , Marine sciences , Fresh water
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: http://hdl.handle.net/10948/49215 , vital:41611
  • Description: Traditionally, coastal communities along the Wild Coast in the Eastern Cape, used mangrove forests for their livelihoods and socio-economic needs. Mangroves along the Eastern Cape coast are threatened by both natural and human factors. The wood obtained from the mangroves by rural households was used as poles for house and fence construction, firewood, and traditional medicine. This is a threat to the status of several mangrove species in this and surrounding areas. The harvesting of mangrove trees will have a direct and indirect effect on the other biotic and abiotic components of the mangrove ecosystems. The Department of Agriculture, Forestry and Fisheries (DAFF) (currently the Department of Environment, Forestry and Fisheries, or DEFF), through the National Forest Act no 84 of 1998, was directly responsible for the wellbeing of the national forests in South Africa. This also includes the mangroves as a specific national forest type. Several estuaries with mangroves occur within state forests. The harvesting and clear-felling of trees for timber and land conversion and associated waste of harvested mangrove poles and laths causes the many changes in mangrove forests. The aim of this study was to develop a framework for sustainable management of the mangroves for the Mtambalala forest management unit. This was done in relation to the requirements of the current legislation, policy guidelines and business plan of the management authority. The aim was pursued through two specific objectives. The first objective was to understand the variation in the composition in different parts of the Ntafufu Estuary, and the population dynamics of the main mangrove species, as basis for the development of sustainable resource use practices. Plots along transects were used to measure seedling to adult ratios, population structure and abiotic characteristics. The second objective was to understand the community use and requirements of mangrove wood from the Ntafufu Estuary. A participatory approach was followed to collect demographic data from each community, the requirements of mangrove poles and behaviour of harvesters. This was used to set up a framework to guide the sustainable management of mangroves based on the current status and stand dynamics of the mangrove communities. There are three mangrove species found in the Ntafufu Estuary: Bruguiera gymnorhiza (black mangrove) regenerates under the mangrove canopy and forms layers of even-aged stands. Avicennia marina (white mangrove) does not regenerate under a mangrove canopy i.e. the seedlings establish outside the canopy. A few Rhizophora mucronata (red mangrove) trees exist in the lower intertidal zone and form multiple stems on stilt roots. The mangrove associate, Hibiscus tiliaceus (wild cotton tree- mangrove associate), forms dense clusters of scrambling stems. Some of the Avicennia individuals show signs of mangrove bleeding and one individual of Bruguiera showed indications of disease. Mngazana and Ntafufu Estuaries had the highest tree densities of 2594 and 1402 trees ha-1 respectively, typical of riverine mangrove forest. The seedling to adult ratio was high in this study: 12.8 for B. gymnorrhiza and 24.3 for A. marina. Abandoned cut stems and laths were found during the study. Bark harvested for traditional medicine and cattle feeding in mangroves was also prevalent and expected to reduce the health of the forest. Mangroves in the Ntafufu Estuary are expanding, and the population structure of the three mangrove species showed a healthy balance between young and mature stems. The harvesting of Black mangrove (B. gymnorrhiza) poles for mainly roof construction is relatively limited. As part of the functions of the DAFF, the use of the mangrove resources has to be balanced with the resource availability from the mangroves, and this should result in a healthy functioning mangrove forest. Development of a participatory forest management (PFM) plan for a forest estate and its forest management unit, require an understanding of the mangrove communities and their dynamics, and the current level of resource use associated with the mangroves. The study recommended that a Mangrove Pole Harvesters Group is needed to practice silviculture through guidance of relevant governmental personnel.
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  • Date Issued: 2020

Underutilisation of information communication and technology in the building construction industry case study: Department of Public Works in the Amathole district in the Eastern Cape

  • Authors: Camngca, Vuyokazi Precious
  • Date: 2020
  • Subjects: Construction industry -- Information technology , Construction industry -- Data processing Information technology Communication and technology
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: http://hdl.handle.net/10948/50632 , vital:42280
  • Description: This study investigated the causes and effects of the underutilisation of Information Communication Technology (ICT) in the building section of the Amathole Region. The construction industry’s daily processes demand both heavy usages of data and data communication between project participants to meet client requirements. This industry is characterised by inaccurate and untimely communications that often result in costly delays and extensions of the project timeframe. ICT is a potential solution to this problem. The objectives of the study are, therefore, to determine why the above, a technically skilled occupational government institution in the Eastern Cape, does not employ ICT efficiently and optimally during this time of the looming global fourth industrial revolution. The literature review detailed the causes of and impact level of ICT’s utilisation and its potential benefits. For data collection, the researcher held unstructured interviews with a Chief Quantity Surveyor, Chief Architect, Engineer, Building Inspectors, and a Quantity Surveyor who dealt directly with construction projects. The key findings revealed that a lack of understanding of existing and newly available ICT software and hardware technology existed amongst certain senior officials within the building technology. The previously alluded, combined with the fear of the inability to learn and apply such new technology, has led to a culture of resistance to change from these more senior officials to utilise applications such as AutoCAD. The above-mentioned resistance, has also triggered the prevention of access to and lack of ICT resources, training, and inadequate funding, thereby eventually resulting in the underutilisation of ICT within the whole building section. This change also adversely affects all officials, especially the junior officials who have graduated using the most recent ICT technology during their studies. The researcher deduced, from the above findings, that adequate change management and continuous development, combined with the allocation of proper resources, would be necessary for all staff members. It was also determined that investments had to be made in the ICT equipment through the provision of a sufficient budget in the building section at AR.
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  • Date Issued: 2020

Unfair discrimination relating to mental illness

  • Authors: Skosana, Hlengiwe
  • Date: 2020
  • Subjects: Discrimination -- Mental health
  • Language: English
  • Type: Thesis , Masters , LLM
  • Identifier: http://hdl.handle.net/10948/47443 , vital:39991
  • Description: Section 9 of the Constitution of the Republic of South Africa, 1996 provides that everyone has the right to equality. The Employment Equity Act, the Promotion and Prevention of Unfair Discrimination Act and the Labour Relations Act were promulgated to fulfil the Constitution’s goals of promoting equality and prohibiting unfair discrimination. Section 6(1) of The Employment Equity Act promotes equality in the workplace and prohibits unfair discrimination; section 187 of the Labour Relations Act provides that dismissals on the grounds listed in the section are automatically unfair; and section 6 of the Promotion and Prevention of Unfair Discrimination Act prohibits unfair discrimination in general. International law prohibits unfair discrimination. Article 1 of the International Labour Organisation’s Convention concerning Discrimination in Respect of Employment and Occupation provides that discrimination in the workplace that has the effect of impairing or nullifying equal opportunity or treatment is prohibited; Article 7 of the United Nations Declaration of Human Rights provides that all are equal before the law and are entitled to protection against any discrimination; and the United Nations Charter and the African United Charter on Human and People’s Rights both promote the right to equality. South Africa has signed and/or ratified these international anti-discrimination laws, and is, accordingly, bound by them. The South African anti-discrimination legislation and international anti-discrimination laws prohibit unfair discrimination, whether it is direct or indirect, or on a listed (that is, a specified ground such as race or disability) or unlisted ground, on a policy, rule or practice. Discrimination based on a listed ground is presumed to be unfair. If discrimination is based on an unlisted ground, the complainant must prove that the discrimination is unfair by applying the Harksen v Lane NO 1997 (11) BCLR 1489 (CC) test. The Harksen v Lane NO test asks whether the discrimination has the attributes and characteristics which have the potential to impair the fundamental human dignity of persons as human beings or to affect them adversely in a comparably serious manner. If the answer is yes, the discrimination is unfair. Mental illness is not a listed ground, meaning it is unlisted. The Labour Appeal Court and Labour Court have, therefore, had to consider whether discriminating against an employee on the basis of their mental illness is unfair, or dismissing them because of their mental illness constituted an automatically unfair dismissal. In the leading case of New Way Motor & Diesel Engineering (Pty)Ltd v Marsland [2009] 12 BLLR 1181 (LAC), the Labour Appeal Court applied the Harksen v Lane NO test and held that the employee’s dismissal was automatically unfair in terms of section 187(1)(f) of the Labour Relations Act. In the recent case of Jansen v Legal Aid South Africa (JA121/2014) [2018] ZALCCT 17, the Labour Court agreed with the Labour Appeal Court decision in New Way Motor & Diesel Engineering (Pty) Ltd v Marsland that dismissing an employee because of their mental illness is automatically unfair in terms of section 187(1)(f) of the LRA, and unfair discrimination in terms of section 6(1) of the EEA. Despite the consistency in case law, the anti-discrimination legislation does not list mental illness as an unfair ground, which means unfairness cannot be presumed. The complainant must, accordingly, prove the dismissal is automatically unfair in terms of section 187(1)(f) of the LRA or that it is unfair discrimination in terms of section 6(1) of the EEA.
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  • Date Issued: 2020

Upwelling on the Southeast Madagascan shelf: frequency, extent, and driving mechanisms

  • Authors: Collins, Matthew
  • Date: 2020
  • Subjects: Upwelling (Oceanography) -- Madagascar , Oceanography -- Research -- Madagascar Marine biology -- Indian Ocean
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: http://hdl.handle.net/10948/49060 , vital:41597
  • Description: The southeast coast of Madagascar, namely the region surrounding the town of Fort Dauphin, is an area that regularly experiences upwelling events. Two unique high frequency data sets, UTR data, and wind data retrieved from a nearby airport, are the primary data sets used to investigate the nature of the upwelling, i.e. the area that experiences upwelling, how often it occurs, and its mechanisms. To complement the in-situ data, several different satellite data sources are used alongside the in-situ data to study this relatively remote region, i.e. SST, chlorophyll-a concentration, current, and wind data. The results refine upon previous literature on the topic. The upwelling covers an area of 1o latitude by 1.3o longitude, and occurs on average 14 times per annum. The mechanism driving the upwelling can be attributed to both wind and current, with wind the more dominant driver along the south coast, and current more dominant along the east coast. Separate to the main objective of the thesis is the importance of in-situ data when analysing small scale events such as upwelling events. While the in-situ wind data were found to be unreliable due to its location within a valley, the UTR data were of vital importance in identifying and studying the finer details of the upwelling events. The satellite SST data, by comparison, were lacking in their ability to investigate the upwelling events. The satellite derived wind data, however, did prove useful when analysing the wind as a driver of the upwelling.
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  • Date Issued: 2020

Utility of construction automation and robotics in South Africa

  • Authors: Mkunqwana, Khungelwa Sandisiwe
  • Date: 2020
  • Subjects: Construction industry -- Automation , Construction industry -- South Africa -- Automation Robotics -- South Africa Robotics
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: http://hdl.handle.net/10948/46174 , vital:39511
  • Description: The construction industry demands active construction organisation, efficient construction processes and innovative construction techniques to effectively compete under increasing market competition and technological advancements in the twenty first century. The problems associated with construction, such as poor quality and slow productivity, labour shortages, occupational health and safety, and inferior working conditions, have opened the possibility of more revolutionary solutions within the industry. One such solution espoused as having tremendous potential to improve construction productivity whilst alleviating the problems associated with construction is Construction Automation and Robotics. Automation and robotics technologies encompass a wide range of innovative technologies using technologically advanced machinery to improve the speed and efficiency of a given process. The aim of this study is to analyse the extent of utility of construction automation and robotics in the South African construction industry. The research adopted the quantitative methodology and online survey to collect data. A detailed quantitative (statistical) data analysis was performed, using web-based software “QuestionPro,” including data analysis for investigating possible relationships between variables. Through this study it has been established that one of the prospective solutions to the problems associated with construction is in the implementation and utility of innovative technologies in construction such as automation and robotics. Moreover, the research found that automation and robotics in South Africa is at an interesting point whereby organisations are taking strides in accepting and implementing the technologies. It is envisaged that the utility of construction automation and robotics would improve the industry in terms of productivity, health and safety and quality.
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  • Date Issued: 2020

Waste management in the informal settlements of Msukaligwa Municipality

  • Authors: Ngema, , Noxolo Nondumiso
  • Date: 2020
  • Subjects: Waste disposal in the ground -- South Africa -- Ermelo , Refuse and refuse disposal -- South Africa -- Ermelo Squatters -- South Africa -- Ermelo
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: http://hdl.handle.net/10948/46827 , vital:39665
  • Description: This study focused on waste management, and, sought to evaluate the level of awareness on environmental impact of littering in vulnerable communities in the informal settlements of Msukaligwa municipality, in particular at Ward 16 which is Nyibe newly named as New Ermelo. This study was, thus, concerned with how solid waste is managed within the informal settlements. The study arose with the concern that the environment is mostly affected when informal settlements are developed. If informal settlements are less aware of the damage caused by littering and improper waste disposal, the waste management plan of a local municipality becomes ineffective where local communities do not assume their responsibilities for ensuring healthy and safe living environments. A quantitative research design was applied in this study. Population for this research comprised of Msukaligwa Local Municipality, with a study sample drawn from Ward 16 Nyibe households, church leaders, local business owners, and ward councillor. A nonprobability sampling technique for selection of study participants was used, and this technique applied in both households and stakeholders. Data was collected through self-administered survey questionnaires that were statistically analysed, weaving in filed observations, where deemed necessary. The researcher discovered that Nyibe (New Ermelo) community’s level of awareness of the environmental impact of littering is impressively above average. Majority of households’ respondents identified all the negative environmental impact caused by littering in vulnerable communities and the impact is considered a major challenge within Nyibe. Necessary waste disposal infrastructures are not provided at Nyibe leading to people littering on any open land, burning, or throwing solid waste in their family pit.
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  • Date Issued: 2020

Water balance processes in indigenous and introduced spaces three production system in the Southern Cape region of South Africa

  • Authors: Mapeto, Tatenda
  • Date: 2020
  • Subjects: Hydrology -- Research -- South Africa , Groundwater -- Research -- South Africa Trees -- Breeding Sustainable forestry
  • Language: English
  • Type: Thesis , Doctoral , DPhil
  • Identifier: http://hdl.handle.net/10948/49325 , vital:41621
  • Description: Forests and trees are important modulators of water flow and their position in the landscape impacts the spatial and temporal availability of ground water and surface water resources. As such, the global extent of natural forests is linked to the availability of water. In the circumstances where tree production systems have been introduced and are managed in landscapes previously populated with other forms of vegetation, it is necessary to understand their hydrological impact so as to ensure that the benefits derived from these tree systems do not outweigh the costs of water availability for sustaining human and environmental water requirements.
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  • Date Issued: 2020

Wind damage impacts on Eucalyptus species performance in South Africa

  • Authors: Hechter, Heinrich
  • Date: 2020
  • Subjects: Commercial forests -- South Africa
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: http://hdl.handle.net/10948/48368 , vital:40853
  • Description: Commercial forestry plantations in South Africa play an important role in the economy of the country, contributing 1.2% towards the gross domestic product, as well as with job creation in rural communities. Currently plantation forests cover 1% (1.2 million hectares) of the South African land surface, of which ±75 000 hectares (±43 000 hectares to Eucalyptus species) are re-established each year. Different timber companies afforest areas with different species to satisfy specific management objectives, with the two main objectives being for either the production of saw-timber or pulpwood. Species of the Eucalyptus genera are preferred as they are fast growing and have desirable wood and pulping properties. However, their productive potential can be negatively impacted by numerous abiotic and biotic risk factors. Of the various risk factors that forest stands are exposed to, wind and wind-related tree damage has received very little attention, both nationally and internationally. Wind-related tree damage may result in wind-throw (uprooting or stem breakage), or trees that tilt (lean off vertical). Trees that are tilting can recover to an upright position, but are likely to retain some level of stem sinuosity or butt-sweep. Although strong winds increase the risk of tree damage, a number of other factors can also act to predispose trees to wind-related damage. These include choice of planting stock (genotype and type of plant stock), planting practices (including soil cultivation), site factors (wind exposure, rainfall, soil texture and soil fertility) or excessive weed competition. Most of the literature dealing with wind-related tree damage has focused on trees growing in natural forests, whereas trees in natural forests differ from forest grown plantation trees in terms of above- and below-ground morphological differences, as well as the stability factors of the trees. There is a need to not only understand the impacts of severe (catastrophic) wind events on mature trees, but also to test management strategies that prevent, or minimize damage prior to any severe wind events. Two existing eucalypt trials were used to provide information on the influence of selected re-establishment silvicultural practices on short-term pulpwood and long-term saw-timber survival, growth and uniformity when influenced by catastrophic wind events, within South Africa.
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  • Date Issued: 2020

Writing and signing to develop written genres : a study of Nigerian hearing-loss students' writing

  • Authors: Milaham, Rahila Samuel , Lundgren, Berit
  • Date: 2020
  • Subjects: Hearing impaired children -- Nigeria -- Writing
  • Language: English
  • Type: Thesis , Doctoral , PhD
  • Identifier: http://hdl.handle.net/10948/47314 , vital:39842
  • Description: The competence in writing of students with hearing loss has continued to generate concern among educational administrators, school authorities, teachers and parents (Oyetunde, 2009). Acquisition of written and signed language is vital for effective functioning of students with hearing loss in school. Writing and signing helps students to interact socially, culturally and intellectually with one another and within their social environment. Therefore, this study explores the writing of specific genres by students with hearing loss using signing and the Language Experience Approach, LEA, among Junior Secondary School (JSS 3) in a Nigerian school for the deaf. The study is a qualitative research study which was underpinned by an interpretive paradigm and was theoretically framed by Vygotsky’s (1978) sociocultural theory, semiotic theory (Pierce, 1991) and socio-semiotic theory (Thibault, 2004: Kress, 1988 & Van Leeuwen, 2005). The ideological literacy perspective (Street 1984) and literacy as a social practice have provided a lens to analyse and explore the findings Class observations, students’ signed and written text samples as well as communication with teachers were used as the methods for data collection. The intervention study, which went on for 9 weeks, involved teaching and learning of three genres, namely retelling, narrative and descriptive writing. Twenty six students and two teachers were involved in the study. For the purpose of the analysis, six out of the 26 students’ written, and signed texts were purposively selected and analysed. The students’ signed and written texts were analysed according to the structure and special features of the genres. In the retelling genre, two concepts, breadth and depth vocabulary knowledge as special features, were used for the analysis of the texts. While in the narrative, students’ signed texts and written texts were analysed to know how the students use characters, settings and events in their texts. In the descriptive genre, students’ sign and written texts were analysed to see whether they gave concise descriptions, specifically using adjectives, of the object they identified in their signed text. The findings indicate that the students could retell the contextualized event with signs, using a vocabulary mostly from a breadth perspective. They also used the structure of retelling in a chronological order. In signing the narrative genre, the students were engaged in giving examples of the genre from which they derived the components of the story form such as character and events. Some could include aspects of character vi and events in their text, while others missed one structure or the other. In general, their narrative signed texts were better developed and showed a basic understanding of the storyline. In the descriptive genre, the students could describe some objects in their classroom and school environment. These descriptions were limited to adjectives like colours, as only colours were used in the teacher’s example. In general, their descriptive signed texts were short and seemed to follow a list structure. The students’ signing in descriptive genre showed an initial awareness of the genre. In this study, the teachers scaffolded and modelled the different genres with examples, stories and prompt pictures to a varying extent. The narrative writing had more scaffolding and modelling compared with the other genres. It also generated longer texts and an awareness of the structure. The teachers also supported the students with deeper exploration of examples in the narrative genre than in the retelling and descriptive genre. Data shows teacher’s interactions with the students while signing narratives indicates an understanding on how to develop a text in story form using narrative structures. LEA turned out to be a fruitful start in the retelling genre but was not as central in the teaching practice and meaningful in students’ writing.
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  • Date Issued: 2020

The re-settlement of a ruined earth: Investigating the notion of “dwelling” through The design of a settlement in a post apocalyptic landscape

  • Authors: Holdstock, Miranda
  • Date: 2020-01
  • Subjects: Landscape architecture , Restoration ecology
  • Language: English
  • Type: Master's theses , text
  • Identifier: http://hdl.handle.net/10948/59051 , vital:60259
  • Description: It is 2100 and anthropogenic climate change is well underway. Human civilisation has collapsed and those who survived the apocalypse are condemned to a life of wandering along a ruined earth; placeless; hopeless; searching for sanctuary. Our most elemental instincts will find this place, and build on it, as we always have. There, we will construct an order in the chaos of the apocalypse, by building dwelling. In an apocalyptic landscape our dependence on dwelling is only amplified. This dwelling, an evolved shelter, the beginnings of settlement, is the manifestation of its dweller’s psyche: the totality of the human mind; the conscious and unconscious; the seen and unseen. It is a chronicle of their dreamworld, memories and experiences. And, when the dweller is also the builder, the dwelling is crafted as an intricate memory-scape - which, in the climate apocalypse, is easily desecrated by the horrors of the end of the known world. Because, at our most vulnerable, when our mortality is confronted, a crisis of being occurs. Those who cannot withstand the physical and psychological suffering that the apocalypse inspires, will become non-beings: those who unconsciously long for death. To portray this, a climate refugee becomes the project’s protagonist. Through her psychological evolution, a dwelling will be built at a site to which she wandered, that represents a ruined earth, where the remains of human civilisation are left behind. Her architecture will embody principles that might facilitate survival in a hyper-harsh environment and safeguard her fragile psychology through bio-inspired and phenomenological design. The final product of this thesis will be a symbolic representation of human wandering, settling and dwelling - the origin of civilisation within chaos. Which, despite the denial of climate change, might be sooner than we think. , Thesis (MA) -- Faculty of Engineering, the Built Environment, and Technology, 2020
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  • Date Issued: 2020-01

A model for successful healthcare facilities delivery by means of public private partnerships

  • Authors: Smith, Christoffel
  • Date: 2019-12
  • Subjects: Healthcare , Public Private Partnership , Universal Health Coverage
  • Language: English
  • Type: Doctoral theses , text
  • Identifier: http://hdl.handle.net/${Handle} , vital:76958
  • Description: The global healthcare fraternity is facing growing challenges for providing and funding adequate healthcare services. Rising demand and associated costs are being fuelled by an aging population; the growing prevalence of chronic diseases and comorbidities; the development of costly clinical innovations; increasing patient awareness, knowledge, and expectations and the continued economic uncertainty despite regional pockets of recovery (Deloitte, 2017). The 2030 Agenda for Sustainable Development, proposes targets and goals for global monitoring of the Sustainable Development Goals (SDG) (WHO, 2016). One such SDG is to realise universal health coverage, meaning equal access to essential quality healthcare services and access to safe, effective, quality and affordable essential medicines and vaccines for all. This requires governmental initiatives to not only extend the reach of healthcare services by covering more of the population, but to also extend the number of healthcare services being made available while at the same time reducing the level of cost sharing (with patients) which is regarded as a major factor that is preventing access to health services. Each country is dealing with this matter in its own way, trading off the proportion of services, costs to be met and population to be covered from limited pooled funds (WHO, 2008). The literature study included two case studies of health service related Public Private Partnerships (PPPs). These studies reflected the contributions that a private health service provider has made to health service delivery and demonstrated some of the benefits that were leveraged through healthcare PPPs. The literature study concluded with an overview of the various elements required to operate a PPP.Public Private Partnerships can supplement government efforts to meet the growing demand for healthcare service delivery. The opponents of private involvement in government responsibilities, base their arguments on numerous examples of poor management of the process as well as fundamentally opposing the concept on ideological grounds (Savas, 2005). The purpose of this research was to contribute to the development of a model whereby PPPs can be leveraged as a modality to supplement government efforts to ensure quality and efficiency of health service delivery and to improve access to healthcare by the wider community in pursuit of the Universal Health Coverage goal. The objective of this research was to develop a conceptual model and test the causal relationship network of how independent variables or factors are expected to interrelate with the intervening variable and how the intervening variable is expected to interrelate with the dependent variable, to optimise the Perceived Success of Public Private Partnerships in the Healthcare Fraternity. , Thesis (DPhil) --Faculty of Engineering, the Built Environment, and Technology, School of Built Environment and Civil Engineering, 2019
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  • Date Issued: 2019-12
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