Anthropogenic effects on sustainability of fish biodiversity in Tyume River, Eastern Cape, South Africa
- Authors: Kinya, Jane Njeri
- Date: 2018
- Subjects: Fishes--Behavior Fishes--Physiology Biotic communities
- Language: English
- Type: Thesis , Doctoral , Zoology
- Identifier: http://hdl.handle.net/10353/11740 , vital:39102
- Description: To determine the anthropogenic effects on the sustainability of fish biodiversity in Tyhume River, a mixture of ecological, economic and institutional parameters were used. To measure ecological parameters, 10 study sites were selected to represent varying intensities of anthropogenic effects on habitat, to represent typical river zones, and to correspond with historical survey sites for trend analysis. In these study sites, habitat characteristics that represent geomorphology (habitat quantity), water quality and ‘alien’ (non–native) fishes were used to determine anthropogenic effects on habitat and fish assemblage. The measured geomorphology characteristics included current velocity, wetted width and depth. The water quality characteristics used were temperature, pH and conductivity. To determine the effects of native and non-native on indigenous fish species in situ, electro fishing was used in riffles, small pools and runs; as well, in situ seine-netting was done in pools. The riches of river fish species was measured, using numbers abundance and longitudinal distribution indices. It was established that only 11percent of the Tyhume River habitat was relatively near natural, while 89percent exhibited anthropogenic habitat modification. Three major sources ofanthropogenic modification on habitat were identified. The major contributor of anthropogenic effects was Binfield Park Dam which accounted for 43percent of modification. The second source of anthropogenic effects on habitat was Alice urban area where storm water runoff accounted for 28percent of modification. Agricultural and livestock grazing, the third anthropogenic effect, accounted for 18percent of modification. The Eastern Cape Rocky, Sandelia bainsii Castelnau, 1861 and Border Barb, Barbus trevelyani Günther, 1868, exhibited reduced distribution. B. trevelyani longitudinal distribution was less than 25 km along the river continuum, with sporadic presence in the sandy foothills. S. bainsii was not found in the Lowland Zone, while previously this species extended from the mountainous zone to the confluence of the Tyhume and Keiskamma Rivers in the Lowland Zone. These indices supported the homogenization theory, as reflected by increased dissimilarity for two indigenous fish species, S. bainsii and B. trevelyani, among study sites. S. bainsii was previously distributed from source to confluence, while B. trevelyani recorded a 50percent decline at the study site below the Binfield Park Dam. To assign economic value to ecosystem services and assess post Rio-institutional parameters two hypothetical scenarios were developed from the ecological survey; one depicting current conditions and another depicting improved ecosystem services. Using a structured interview questionnaire, five ecosystem services in need of restoration were described to respondents. Applying the contingent valuation method respondents were asked a dichotomous choice question on willingness to pay (WTP). Results of the economic study from 209 personal interviews revealed, individuals were willing to pay an additional R 32.00 on their monthly water bill or R 384.00 annually. Generalizing this to 2 829 households living in the Alice and Ntselamanzi urban areas, a total value of R 1 086 336 would be realized annually. This was equivalent to the Nkonkobe Municipality annual budget for storm water management in Alice urban area. Costs/benefits revealed a positive net present value (NPV) = 1, which, in line with economic theory, meant gainers were able to compensate losers The institutional part of the economic survey sought to determine the effects of post Rio Earth Summit institutional measures on sustainable management of Tyhume River fish assemblage. A desk review of Rio Declaration and three South African statutes were used namely; Constitution Act 108 of 1996 (South African Constitution 1996); the National Environmental Management Biodiversity Act No. 10 of 2004 (NEMBA 2004), the National Environmental Management Act (NEMA) No. 107 of 1998 (NEMA 1998), and the National Water Act No. 36 of 1998 (NWA 1998). The Institutional and Analytic Development (IAD) Framework, coupled with requirements for sustainability of Multiple Use Resource Domains were used for the analysis. De Jure, the statutes had internationalization of environmental costs through “polluter pays principle”, while sustainable use was the overarching goal. De facto, the community participation, a requisite of post Rio measures, was low; however 89percent of community respondents were willing to join an environmental conservation group. This, coupled with the fact that 77percent of those interviewed supported the establishment of a Tyhume River Restoration Fund, provided scope for a broad based community participation framework This study contributes to sustainable use of Tyhume River and other lotic systems by generating information on the link between anthropogenic effects on fish biodiversity, economic value of ecosystems services and institutional mechanisms.
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- Date Issued: 2018
Assessment of the human health implications of climate variability in East London, Eastern Cape, South Africa
- Authors: Orimoloye, Israel Ropo
- Date: 2018
- Subjects: Climatic changes -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Doctoral , Geography
- Identifier: http://hdl.handle.net/10353/10113 , vital:35346
- Description: Impacts associated with climate variability and extreme heat are already obvious in varying degrees and expected to be disruptive in the near future across the globe especially in the urban regions. Urban areas have distinctive features that leave their residents and properties vulnerable to extreme climate events. Global temperatures continue to change, reaching new levels almost every year for the past two decades. However, even though the causes are debated it is evident that climate variability is real. Climate variability and disaster risk are threats to human health that adversely reinforce each other. Better knowledge on the association between climate change, variability and extreme weather-related illness is needed and can aid strategies to reduce vulnerabilities. The impacts of climate variability on the health of residents in East London (EL) area in the Eastern Cape Province, South Africa were explored through four interdependent research segments. The first section examined the climate variability and urban surface thermal characteristics implication on human health using Remote Sensing (RS) and Geographic Information System (GIS) techniques. Remote sensing was used to assess the Land Surface Temperature (LST) and estimated Radiation (R) of East London area from Landsat Thematic Mapper (TM) images for 1986, 1996, 2006 as well as from Operational Land Imager (OLI) and Thermal Infrared Sensor (TIRS) for 2016 spanning a period of 30 years. Rapid urbanization and land cover changes in this area have contributed significantly to this drastic change in the natural land surface characteristics (increased land surface temperature and surface solar radiation). For instance, vegetation cover declined by about 358.812km2 while built-up areas increased by 175.473km2 during this period which correlates with the area thermal characteristics changes. Radiation levels also increased over the years with values exceeding the global solar radiation index. Exposure to increased surface radiation poses risks of heat stroke, skin cancer and heart disease to the local population. Consequently, this study provides pertinent information on human health sustainability and epidemiological case management. The second part explored past temperature and humidity trends (1986-2016) and projects future trends (2017-2030). The historical data of meteorological variables were obtained from the archives of the South African Weather Service and analyzed using the ordinary least square regression model in GRETL (GNU Regression Econometric and Time-series Library) statistical software. This study discovered a local consistency between models and the observations add to existing knowledge and this is crucial in knowing the shifts in climatic change as well as recognizing variability and its conflicting effects on human health, environment, agriculture, ecological sustainability and socioeconomic status in the region. The third segment assessed the potential impacts of climate variability on health using existing heat indices during the study period. The results demonstrated that in East London from 1986 to 2016 during summer and autumn (December to May) of various years exceeded high heat index values. It is obvious that summer and autumn months are more vulnerable to heat extreme and humidex. The humidex and Heat Index (HI) increased annually by 0.03percent and 0.9percent respectively throughout the study period. The increment in the various indices showed highly significant ill-health and environmental impacts on humans especially with prolonged exposure. The last segment appraised the association between climatic elements and epidemiological incidences of the study area between 2012 and 2016. The epidemiology incidences data were obtained from the archives of the Cecilia Makiwane Hospital in East London area and National Tertiary Service Grant (NTSG) database for the period. The results have showed that there exists significant effects of climate variability on the health of East London residents and these have been identified to have negative impacts on health of the people in the area. This study also revealed noticeable impacts of extreme heat on human health and a positive correlation between meteorological components (HI and temperature) and epidemiological cases (cardiovascular, skin cancer and diarrhea) during the study period.
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- Date Issued: 2018
Re-interpreting the history of 'the rural' visual in the Eastern Cape, 1948-1976
- Authors: Steele, Candice Alexandra
- Date: 2018
- Subjects: Medical photography -- South Africa -- Exhibitions Photography in ethnology -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10353/11064 , vital:37027
- Description: The thesis engages with the photographic collection of Dr Pauline Ingle, an amateur photographer who lived and worked in the former Transkei as a medical doctor from 1948-1976. As a visual history project situated within critical visual studies, the thesis is concerned to attend to the disciplinary optics that have conditioned seeing and constituted genres; but also the ways in which these genres have constituted subjects and corralled them into positions commensurate with the spatialised demarcations of the rural and the urban, and the attendant associations of tradition and modernity. The thesis begins by exploring the biography of Pauline Ingle and tracks the movement of the photographs from a private collection into the public realm and its constitution as an archive. The thesis then moves into a discussion of the key determinants of the ethnographic genre and its entwinement with the discipline of anthropology, as a foundation against which to investigate the limits of reading her images within this genre and the disruptions that are discernible through an aesthetics of proximity and forms of image-making that do not control the visual field. Through a theorisation that proposes the image as an act, various readings are brought to bear on the images through the lens of the social and political. Mobilising the concepts of social acts and acts of citizenship, allows for a reading that breaks with the disciplinary conditioning that has fixed subject positions into ‘the native subject’ and the ‘liberal subject’ and calls into question the construction of the human. By proposing the subject as migrant, is to signal that the question of the human/subject is more complex and convoluted than previously thought.
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- Date Issued: 2018
Exploring fathers' role in supporting their children's learning : a case of selected primary schools in the East London District
- Authors: Pampila, Siyabulela
- Date: 2017
- Subjects: Education -- Parent participation -- South Africa -- Eastern Cape Father and child -- South Africa -- Eastern Cape Home and school -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: http://hdl.handle.net/10353/4915 , vital:28755
- Description: The aim of this study was to explore fathers’ role in supporting their children’s learning in selected urban primary schools in the East London Education District. Epstein parental involvement theory informed the study. The study was located in the interpretivist research paradigm and it qualitative in nature. It followed a case study research design. Participants were selected through the use of purposive sampling. A total of fifty two (52) participants were selected and these included school teachers, fathers and learners. Semi-structured interviews (for school teachers and fathers) and focus group interviews (for learners) were used in the four selected primary schools. The data was coded and thematic content analysis was used. The findings from the research indicated that fathers’ and teachers had a very limited understanding of fathers’ support in children’s learning. They generally thought that it was confined to activities done at school such as payment of school fees and levies, providing labour for the construction or renovation of school buildings and providing teaching/learning resources. Participants confirmed that the majority of fathers were too poor and with low education to be meaningfully involved in their children’s learning. However, there were a few fathers who believed that their socio-economic status did not prevent them from participating in their children’s learning. They actually indicated useful ways in which they could be involved. It was found that a minority group of fathers who were unemployed spent time helping their children in their learning whilst, those working worked long hours and had no time to help their children. Among the significant findings of the study was the fact that educated fathers were too involved in their children’s learning and even reserved time on weekend to be part of their children’s life and learning. The research also revealed that fathers and teachers had wrong perceptions about themselves and each other in connection with limited fathers’ support in their schools. The study recommends, among other issues, enhanced school/parent partnership with emphasis on the involvement of fathers in academic activities meant to improve their children’s learning.
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- Date Issued: 2017
Financial characteristics of the nonprofit organisation: theory and evidence for the assessment of the financial condition of South African public universities
- Authors: Bunting, Mark Bevan
- Date: 2016
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:923 , http://hdl.handle.net/10962/d1021298 , http://orcid.org/0000-0002-3392-554X
- Description: In this thesis, an analytical framework is developed for the assessment of the financial condition of South African public universities. Foundational constructs of nonprofit economics are applied in the consideration of financial theories of nonprofit organisations in general, and public universities in particular. From this review, a number of hypotheses are developed. Each of these specifies a positive or negative association between a university's financial condition and a particular dimension of its assets, liabilities, equity, revenues, expenses and surplus. From the nonprofit financial analysis literature, ratios and indicators relevant to these hypotheses are selected. Audited data from the annual financial statements of the universities for the seven year period 2007 to 2013 are substantially transformed in mitigation of failures in accounting, auditing and accountability. The adjusted accounting numbers are used to calculate the financial indicators applicable to each university. Exploratory factor analysis is implemented to categorise and organise this large indicator set on the basis of identified associations with a smaller number of factors. It is found that the financial condition of South African public universities is defined by two broad financial characteristics, capital and revenue. Assessment of the capital dimension is informed by a focus on institutional equity, with particular emphasis on expendable equity and its proportionate relationships with surplus, total capital, and total expenses. The revenue dimension is appropriately evaluated in the context of a comparative and interactive consideration of the three main components of South African public university revenue, as well as the proportionate relationship between non-staff operating expenses and total expenses. The framework displays considerable levels of stability and consistency over the seven year review period, and its constructs are, in addition, robust to the application of multiple alternative confirmatory tests involving financial data that are independent of the factor solutions. The financial condition assessment framework developed in this thesis offers a contribution to a broader discourse in nonprofit finance and accounting, with a focus on public university finances.
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- Date Issued: 2016
Head of state immunity under the Rome statute of the International Criminal Court: an analysis of the contemporary legal issues and the African Union’s response to the prosecution of African heads of state
- Authors: Oyugi, Phoebe Akinyi
- Date: 2015
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: http://hdl.handle.net/10962/7746 , vital:21292
- Description: This research examines the impact of head of state immunity on the relationship between Africa and the International Criminal Court (ICC). Thus, it investigates the position of heads of state immunity before international criminal tribunals with special regard to the ICC and assesses the response of African States Parties to the Rome Statute of the International Criminal Court (Rome Statute) to their cooperation obligation under article 98 (1). In addition, it seeks to ascertain the extent to which the African Union (AU) decisions impact on the decision of African States Parties to the Rome Statute to cooperate with the ICC and determine the legality of Article 46 bis of the Protocol on Amendments to the Protocol on the Statute of the African Court of Justice and Human Rights (the Amendment Protocol). Thereafter, it appraises the possible impact of these developments on the application of the principles of international criminal justice in Africa and finally, makes recommendation on ways in which the AU-ICC relationship can be improved. The thesis begins by discussing immunity as a rule of customary international law and the exceptions to its application with regard to international criminal law. This paves way for the analysis of the cooperation regime of the ICC and exceptions thereto with special focus on immunity under article 98 (1) of the Rome Statute. The factors arising from the AU decisions relating to cooperation with the ICC are also discussed with a view to determine their justification under international law. The thesis draws on examples from Chad, Kenya and Malawi to illustrate the manner in which African States Parties to the Rome Statute respond to their cooperation obligation and to what extent this response is affected by the AU position. Lastly, the position of article 46 A bis of the Amendment Protocol, which safeguards immunity based on official capacity, is analysed with a view to determine how the introduction of this new provision is likely to affect the application of international criminal law in the African continent. Drawing on the study of the issues above, the thesis comes to the following conclusions. First, the application of immunity before a particular tribunal depends on the factors influencing its establishment and its mandate as provided for in the constitutive instrument. Secondly, states parties to the Rome Statute can rely on article 98 (1) to deny the ICC request for the arrest and surrender of President Bashir because he is the head of a non-party state. Thirdly, the AU’s position does not have a direct impact on the decisions by African States Parties to the Rome Statute on the issue of the arrest and surrender of President Bashir to the ICC. Fourthly, some of the AU grievances against the ICC have justification in international law and therefore deserve the attention of the ICC and the international community. Fifthly, article 46 A bis is in line with the principles of international law on immunities. Given these findings, the thesis recommends that the AU-ICC relationship should be mended in the interest of international criminal justice. And that this can be done by: strengthening the capacity of African States and Africa as a region to deal with international crime occurring in Africa; forging a deeper cooperation between the AU and the United Nations Security Council (UNSC) in ICC related matters; and by the ICC adopting a broad interpretation of its discretion during the prosecution of heads of state. This would allow the ICC to mete out justice without jeopardizing the proper functioning of the states whose heads are on trial.
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- Date Issued: 2015
Investigating the inclusion of environmental learning in the Life Science Grade 10 curriculum : a case study of three Namibian schools
- Authors: Joseph, Cecilia Namuhuya
- Date: 2015
- Subjects: Life sciences -- Study and teaching (Secondary) -- Namibia -- Omusati , Environmental education -- Study and teaching (Secondary) -- Namibia -- Omusati , Curriculum-based assessment -- Namibia -- Omusati , Pedagogical content knowledge , Educational tests and measurements -- Namibia -- Omusati
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:2033 , http://hdl.handle.net/10962/d1017344
- Description: This study was carried out to investigate how Grade 10 Life Science teachers in three schools in the Omusati region of Namibia are including Environmental Learning (EL) in terms of the curriculum policy. A qualitative approach was used to generate data through document analysis, interviews and classroom observations to investigate the application of the policy of including environmental learning in classroom curriculum practice. The research was primarily directed towards examining constraints and enabling factors in the context of the three schools that participated in the study. The study revealed that teaching strategies for the inclusion of environmental learning were not widely evident, suggesting disparities between the policy of enabling environmental education through the inclusion of environmental learning across the curriculum. It was notable that teacher knowledge and interest in environmental education influence how they include environmental learning and that assessment practices narrow the scope of environmental learning in ways that do not include critical thinking and problem solving skills. The study concludes that despite diverse constraints inhibiting inclusion, the evidence suggests that the inclusion of environmental learning in Namibia’s Life Science curriculum can enable environmental education. The above main findings are used to make recommendations toward strengthening environmental content knowledge of teachers and to improve assessment practices. It was also noted that some of the environmental learning constraints could be transformed into enablers with more teacher support and by making a better link between environmental learning theories and practices. This will involve a redirection of the curriculum documents as well as the provision of other learning support materials to support environmental learning. The study has enabled me to conclude that what is happening should be encouraged so that it continues and is strengthened although the implementation of environmental learning is not as clear as the policy had mapped out.
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- Date Issued: 2015
The consideration and improvement of the sustainability performance monitoring framework for South African water boards
- Authors: Thompson, Craig Howard
- Date: 2015
- Subjects: South Africa -- Department of Water Affairs -- Management , Water-supply -- Law and legislation -- South Africa , Performance -- Management , Environmental auditing -- South Africa
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:858 , http://hdl.handle.net/10962/d1018916
- Description: The South African Constitution ensures the right to adequate water, health services and a healthy environment (Government Gazette, 1996: 1251, 1255). Associated legislation and national strategies require that water resources and water services are rendered in a sustainable manner to ensure the rights enshrined in the Constitution are realised (Trialogue, 2010: 34; Government Gazette, 1998(c):11; Department of Water Affairs (DWA), 2003:9). South Africa is the 30th driest country in the world (DWA, 2013: iii), has impounded most of its surface water resources and has utilised 40 percent of the groundwater resource with remaining groundwater water quality uncertain (DWA, 2013:6-7). Despite achieving the basic water and sanitation Millennium Development Goals approximately 2.2 million and 4.5 million households still require access to basic services respectively (DWA, 2013:28-29). South Africa’s ten water boards play a key role in bulk water service provision. They supply 57 percent of the countries domestic water supply (DWA, 2013:19) and are required to provide sustainable water services (Government Gazette, 1997:35). The Department of Water Affairs (Department of Water and Sanitation (DWS) as of June 2014) is mandated to monitor the performance of water boards and monitors of water boards through a Share Holders Compact (SHC) (Government Gazette, 1997: 50). The aim of the research is to achieve the following objectives: 1. Describe best practice for sustainability monitoring frameworks for water services. 2. Outline South Africa’s water services mandatory and voluntary requirements with regards to sustainability monitoring. 3. Evaluate South Africa’s current water services performance monitoring framework for water boards against findings from goals one and two. 4. Develop an improved framework for assessing South African water board’s performance in their compliance and sustainability journey. 5. Demonstrate the improved framework functionality with a sample of water boards audited performance data from the 2012/13 financial year. A qualitative normative theory evaluation research method was utilised to achieve first three objectives of the research. The objectives to first understand current best practice for sustainability monitoring frameworks and the mandatory requirements for water services sustainability monitoring frameworks in South Africa was achieved via an extensive literature review. The evaluation research method was used where South Africa’s current water services monitoring framework for water boards was evaluated for its adequacy to monitor sustainability compared with legislated requirements, national and international best practices (Hall et al, 2004: 55). Data collection for the evaluation research was sourced via documentation analysis. The 2012/13 water board audited annual reports, relevant national water services legislation, national and global water service sustainability monitoring best practices were critically reviewed. The review yielded a “thick description” of sustainability performance monitoring framework requirements that was used to evaluate the SHC (Holliday, 2002: 79). Despite the mandatory participation requirement for successful sustainability performance monitoring being met, the SHC was found to have inadequate aspects. It lacks an outcomes based approach, does not include environmental indicators, does not allow water board sustainability performance comparison and cannot indicate where individual water boards are on their sustainability journey. An improved sustainability performance monitoring framework for South African water boards is therefore proposed. This was developed with the assistance of an expert focus group drawn from multiple disciplines and organizations relevant to water board sustainability (Litosseliti, 2003: 8 and Hall et al, 2004: 51). The functionality of the framework is then demonstrated using 2012/13 audited performance data sourced from the annual reports of Overberg, Amatola, Rand and Umgeni Water boards. The proposed Water Services Sustainability Monitoring Framework (WSSMF) quantifies performance in terms of 10 water utility outcomes that are measured with 88 performance indicators that encompass the financial, social, environmental and governance dimensions of sustainability. The WSSMF demonstrated that the legislated intentions and best practice recommendations can be incorporated into an improved version of the SHC. Further refinement of the WSSMF is required. In depth engagement with DWS and all the water boards would promote the refinement of the indicator set, performance thresholds for indicators and indicator weighting. Further testing through a pilot project initiative would allow the WSSMF to be developed into a robust and adequate sustainability performance monitoring framework for South African water boards (Rametsteiner et al, 2011: 64; Muga and Mihelcic, 2008: 438; McAlphine and Birnie, 2005: 247 and van Leeuwen et al, 2012: 2192).
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- Date Issued: 2015
The design of a seaside hydrotherapy facility in Nelson Mandela Bay, Beachview
- Authors: Van Jaarsveld, Nadine
- Date: 2015
- Subjects: Health resorts -- South Africa -- Port Elizabeth -- Designs and plans Hydrotherapy , Recreational therapy
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/18663 , vital:28703
- Description: This treatise is about the design of a seaside hydrotherapy facility which will treat health conditions through the healing properties of water therapy and nature, as well as improving the wellness of the users. The purpose of this treatise is to understand the architectural aspects involved in a seaside hydrotherapy facility, such as the theoretical, the contextual, spatial, and the physical aspects. The facility will be located in Nelson Mandela Bay at Beachview in a therapeutic setting on the seafront, and will not only provide specialized thalassotherapy, but also give the users the benefit of the mental healing properties of the ocean. The building itself aims to promote healing and relaxation and challenges the designer to make maximum use of these elements. The nature of hydrotherapy facilities requires the provision for recovery, which indicates the setting up of overnight amenities as well as daily access. With this in mind, the relationship between these two groups of users and their connections, are explored. The facility proposes to use design as a way to connect the sea, land and architecture, in order to form an integrated relationship for the beneficial use of the user. An architectural design is proposed which is formed of specific sets of architectural issues that were identified and analysed. The work of professionals and other architectural designs with similar challenges were studied in terms of their particular responses and their relationships were analysed in relation to a seaside hydrotherapy facility.
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- Date Issued: 2015
Understanding how grade 11 Biology teachers mediate learning of the topic on transpiration
- Authors: Frans, Marian Kauna Nyanyukweni
- Date: 2015
- Subjects: Biology -- Study and teaching (Secondary) , Plants -- Transpiration -- Study and teaching (Secondary) , Language and education
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:2027 , http://hdl.handle.net/10962/d1017338
- Description: This study emerged in response to the poor performance in Biology at my school. The Ministry of Education Biology (NSSCO) Examiners’ report (2011) for Paper 3 indicates that learners proved to have difficulties in designing experiments, failed to give a distinction between apparatus and the experiment. The 2012 Examiners’ report on transpiration also highlights that learners were not exposed to practical work. Furthermore, the 2012 report notes that teachers need to work on their learners’ drawing and spelling of terms. It is against this backdrop that a qualitative study was conducted at a school in Oshikoto, using a sample of two teachers. The study’s purpose was to investigate how grade 11 Biology teachers mediate learning of the topic on transpiration. Social Constructivism and Pedagogical Content Knowledge formed the framework used to analyse data gathered from document analysis, interviews and observations. The study findings were that teachers use locally available material for demonstration during practical work, elicit prior knowledge, use a chalkboard to summarise content to learners, and use a question and answer method as strategies in mediating learning on transpiration. In addition, the teachers use homework, scaffolding activities, group work, code-switching, feedback on activities, as well as the use of analogies. Despite efforts by participant teachers to mediate learning of transpiration, shortage of equipment for conducting practical work, poor English proficiency among teachers and learners, and little emphasis on graphing by the syllabus proved to be barriers to their efforts. This study thus recommends that in order to improve on teaching transpiration, teachers need to co-plan lessons, conduct practical work, code-switch during lessons, ensure effective assessment, and include lessons on graphing. Furthermore, teachers need continued training on how to teach transpiration.
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- Date Issued: 2015
Financial management practices employed by small and medium enterprises (SMES) in the Buffalo City Metropolitan Municipality, Eastern Cape
- Authors: Marembo, Mathew
- Date: 2013
- Subjects: Small business -- South Africa -- Eastern Cape -- Finance , Small business -- South Africa -- Eastern Cape -- Management
- Language: English
- Type: Thesis , Masters , M Com (Business Management)
- Identifier: vital:11325 , http://hdl.handle.net/10353/d1013583 , Small business -- South Africa -- Eastern Cape -- Finance , Small business -- South Africa -- Eastern Cape -- Management
- Description: This study examined how financial management decisions are made by small and medium enterprises (SMEs) in the Buffalo City Metropolitan in Eastern Cape, South Africa. The study aimed at discovering SME awareness on financial management practices. The financial management practices address issues on capital budgeting, working capital management, capital structure, financial reporting and analysis. The study, therefore, hypothesised that SMEs were not aware of the sound financial management practices. It was also intended in this study to examine the relationship between employment of sound financial management practices and firm financial performance. Subsequently, the study hypothesised that the employment of sound financial management practices by SMEs did not significantly affect their financial performance. The results obtained in this study revealed that SMEs were aware of the sound financial management practices that could be employed to yield high financial performance. However, the results also revealed that most SMEs were not employing qualified personnel and this in turn had an effect on the effectiveness of the financial management practices that the SMEs utilised. The findings also indicated that the employment of sound financial management practices did significantly and positively affect the financial performance of SMEs. The study recommended that SMEs could increase their chances of financial survival if they employ sound financial management practices. The study also gave recommendations to the South African Government to provide effective facilities and services to SMEs and help sustain them because they are important in the economy. Lastly, the study recommended financial institutions to relax their credit granting policies so that SMEs could access funds.
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- Date Issued: 2013
Cash transfers and poverty reduction in South Africa: a case study of old age pensions
- Authors: Kasere, Gayle Farai
- Date: 2012
- Subjects: Poverty -- Economic aspects -- South Africa -- Eastern Cape Poverty -- Grahamstown -- Eastern Cape Social security -- South Africa Pensions -- South Africa
- Language: English
- Type: Thesis , Masters , MSocSc
- Identifier: vital:3321 , http://hdl.handle.net/10962/d1003109
- Description: Social assistance in the form of cash grants is a large and fiscally costly component of anti-poverty policy in South Africa. A critical question arises: Are the grants effective tools for reducing poverty in South Africa and, moreover, how significant is their impact on poverty? As a measure of reducing poverty, the government has expanded the social grants system since the advent of the new democracy in 1994. The country's social grant system is quite comprehensive and it is intended to cover vulnerable individuals over their life course from childhood to adulthood and into old age. Policy discourse surrounding the grants centres on the sustainability of the system and its implications for socio-economic development and poverty alleviation. It is therefore important that the significance of grants is identified and assessed particularly in relation to very poor households. This dissertation focuses specifically on one particular grant, namely, the old age pension. It does so in the context of the sustainable livelihoods conceptual framework and the history of the social grant system in South Africa. Statistical data collected by the South African government as well as more localised evidence gathered in the Eastern Cape town of Grahamstown is used to ascertain the significance of old age pensions for poverty reduction. While there is some evidence to suggest that pensions contribute to poverty reduction, this does not translate into poverty alleviation. In fact, there is some unevenness in the impact of pensions on poverty. In this regard, the decision-making structures in poor households regularly influence the way pension money is allocated and used within households. Grant money is normally shared in extended households, such that the pension does not simply benefit the recipient but the recipient's household as a whole. Although there is cause for concern regarding the propensity of social grants to affect people's behaviour negatively, there is a case to be made for retaining grants as an important, though not the only, form of anti-poverty strategy. This highlights the need for continued research on the social grant system and pensions more specifically.
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- Date Issued: 2012
Developing a form-process framework to describe the functioning of semi-arid alluvial fans in the Baviaanskloof Valley, South Africa
- Authors: Bobbins, Kerry Leigh
- Date: 2012
- Subjects: Alluvial fans -- Research -- South Africa Sedimentation and deposition -- Research -- South Africa Geomorphology -- Research -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4825 , http://hdl.handle.net/10962/d1005500
- Description: The Baviaanskloof catchment is a semi-arid catchment located in the Cape Fold Mountains of South Africa. Little is known about the functioning of the complicated Baviaanskloof fluvial system and the role alluvial fans in the fluvial landscape. This thesis will contribute to field of geomorphology and, more specifically, to the field of fan morphometry by producing a standalone fan framework outlining methods to investigate the influence of external and internal control variables on alluvial fans. In this thesis, outcomes of the applied framework and case study are used to develop fan restoration guidelines for the Baviaanskloof Valley. The framework incorporates external and internal fan control variables at a valley-wide and local fan scale. External control variables include accommodation space, base-level change, and drainage basin inputs. Internal control variables include fan style, morphometry and fan channels. In order to apply the framework, fan morphometry data was required. This data was collected by creating a spatial plan of fans and basins in the valley. Outcomes of the applied framework include; an understanding of baselevel change on fans, relationships between fan basin characteristics and the fan surface and insight into fan channel processes. Results of the applied framework are investigated further using bivariate (correlation matrix) and multivariate (principle component analysis and regression analysis) analysis techniques. Significant relationships identified are: drainage basin area versus fan area, fan area and fan slope and drainage basin ruggedness and basin size. The primary outcomes of this thesis include an alluvial fan form-process framework, key considerations to be included in alluvial fan restoration projects and fan restoration guidelines. Contributions of this thesis to broader alluvial fan morphology science includes new insights into general fan literature by compiling a form-process alluvial fan classification framework to identify external and internal fan control variables and identify fan form. Additions have been made to Clarke’s (2010) evolutionary stages to describe stages 4 and 5 of fan evolution that has been adapted to describe fan evolution and differentiate between stages of mature fan evolution. This thesis has also contributed to the study of alluvial fans in South Africa, particularly in the Baviaanskloof Valley. The layout of the procedural guidelines and key considerations for an alluvial fan project provides a guide for rapid fan assessment for maximum cost and time benefits for stakeholders.
- Full Text:
- Date Issued: 2012
GPF : a framework for general packet classification on GPU co-processors
- Authors: Nottingham, Alastair
- Date: 2012
- Subjects: Graphics processing units , Coprocessors , Computer network protocols , Computer networks -- Security measures , NVIDIA Corporation
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4661 , http://hdl.handle.net/10962/d1006662 , Graphics processing units , Coprocessors , Computer network protocols , Computer networks -- Security measures , NVIDIA Corporation
- Description: This thesis explores the design and experimental implementation of GPF, a novel protocol-independent, multi-match packet classification framework. This framework is targeted and optimised for flexible, efficient execution on NVIDIA GPU platforms through the CUDA API, but should not be difficult to port to other platforms, such as OpenCL, in the future. GPF was conceived and developed in order to accelerate classification of large packet capture files, such as those collected by Network Telescopes. It uses a multiphase SIMD classification process which exploits both the parallelism of packet sets and the redundancy in filter programs, in order to classify packet captures against multiple filters at extremely high rates. The resultant framework - comprised of classification, compilation and buffering components - efficiently leverages GPU resources to classify arbitrary protocols, and return multiple filter results for each packet. The classification functions described were verified and evaluated by testing an experimental prototype implementation against several filter programs, of varying complexity, on devices from three GPU platform generations. In addition to the significant speedup achieved in processing results, analysis indicates that the prototype classification functions perform predictably, and scale linearly with respect to both packet count and filter complexity. Furthermore, classification throughput (packets/s) remained essentially constant regardless of the underlying packet data, and thus the effective data rate when classifying a particular filter was heavily influenced by the average size of packets in the processed capture. For example: in the trivial case of classifying all IPv4 packets ranging in size from 70 bytes to 1KB, the observed data rate achieved by the GPU classification kernels ranged from 60Gbps to 900Gbps on a GTX 275, and from 220Gbps to 3.3Tbps on a GTX 480. In the less trivial case of identifying all ARP, TCP, UDP and ICMP packets for both IPv4 and IPv6 protocols, the effective data rates ranged from 15Gbps to 220Gbps (GTX 275), and from 50Gbps to 740Gbps (GTX 480), for 70B and 1KB packets respectively. , LaTeX with hyperref package
- Full Text:
- Date Issued: 2012
Biosorption of precious metals from synthetic and refinery wastewaters by immobilized saccharomyces cerevisiae
- Authors: Mack, Cherie-Lynn
- Date: 2008
- Subjects: Metals -- Refining Metals -- Absorption and adsorption Saccharomyces cerevisiae Factory and trade waste Water reuse Platinum
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4071 , http://hdl.handle.net/10962/d1006977
- Description: The process of precious metal refining can be up to 99.99% efficient at best, and although it may seem small, the amount of valuable metal lost to waste streams is appreciable enough to warrant recovery. The method currently used to remove entrained metal ions from refinery wastewaters, chemical precipitation, is not an effective means for selective recovery of precious metals from a wastewater. Biosorption, the ability of certain types of biomass to bind and concentrate metals from even very dilute aqueous solutions, may be an effective point-source metal recovery strategy. The yeast, Saccharomyces cerevisiae, has been found capable of sorbing numerous precious and base metals, and is a cheap and abundant source of biomass. As such, it represents a possible precious metal sorbent for application to refining wastewaters. In this investigation, S. cerevisiae biomass was immobilized, using polyethyleneimine and glutaraldehyde, to produce a suitable sorbent, which was found to be capable of high platinum uptake (150 to 170 mg/g) at low pH (< 2). The sorption mechanism was elucidated and found to be a chemical reaction, which made effective desorption impossible. The sorption process was investigated in a packed bed column conformation, the results of which showed that the diameter and height of the column require further optimization in order to attain the metal uptake values achieved in the batch studies. When applied to a refinery wastewater, two key wastewater characteristics limited the success of the sorption process; the high inorganic ion content and the complex speciation of the platinum ions. The results proved the concept principle of platinum recovery by immobilized yeast biosorption and indicated that a more detailed understanding of the platinum speciation within the wastewater is required before the biosorption process can be applied. Overall, the sorption of platinum by the S. cerevisiae sorbent was demonstrated to be highly effective in principle, but the complexity of the wastewater requires that pretreatment steps be taken before the successful application of this process to an industrial wastewater.
- Full Text:
- Date Issued: 2008
Segregated housing and contested identities: the case of the King William's Town coloured community, 1895 - 1946
- Authors: Victor, Stephanie Emilia
- Date: 2007
- Subjects: Colored people (South Africa) -- Race identity Colored people (South Africa) -- Political activity South Africa -- Race relations Colored people (South Africa) -- Housing Housing -- South Africa -- King William's Town Colored people (South Africa) -- Relocation Colored people (South Africa) -- South Africa -- King William's Town
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2568 , http://hdl.handle.net/10962/d1002421
- Description: This thesis is a case study of the dynamics of coloured housing in King William's Town between 1895 and 1946. The impact of spatial segregation on pre-apartheid coloured settlements in the Eastern Cape has largely been ignored up to the present. This needs to be rectified as the lack of in-depth enquiry can lead to misinterpretations that may influence contemporary politics and identity formation. Through research based on primary sources, it has become apparent that segregation in King William's Town was safeguarded and rationalized through the discourses of sanitation and civilization, and the practices of relocation and removal. The existing slum cond itions were used as a convenient excuse to implement municipal control. Segregation compounded the problem of poverty, inequitable access to housing and the provision of basic services. As a result, local coloured housing was increasingly characterised by a shortage of decent accommodation and basic services, decreasing home ownership and increasing municipal tenancy. In addition, through the implementation of the 1923 Natives (Urban Areas) Act and the 1934 Slums Act, high sanitation standards were set, but the Council itself provided inferior services. Ironically, conditions in the relocated municipal settlements were also not on par with the provisions stipulated in the Slums Act that were used to effect removal in the first place. The implementation of racially exclusive housing was, therefore, not driven by a single role player. It was pioneered by the local authorities, legalised by national government and supported by the coloured elite, when needed, in an attempt to access decent housing. This occurred mainly through the political manoeuvring of the coloured elite, and specifically the African Political (later People's) Organisation (APO), the Afrikaanse Nasionale Bond (AN B) and the locally constituted Coloured Welfare Association (CWA) in King William 's Town. These organisations attempted to procure access to housing within the narrow boundaries of a prescribed identity. Segregated housing therefore fostered and sustained coloured identity. It consolidated feelings of separateness and division and provided impetus for the construction of race and even racial tension. Coloured identity attempted to serve as a rallying point to overcome differences in religion, family and social networks and place of residence in order to procure access to housing. It was not, however, able to overcome the occasional division between settlements, caused by well-developed placeidentities, which still inform the contemporary housing milieu. The coloured elite initially did not question the legitimacy of coloured identity. Only in 1939, under threats of increased residential segregation, combined with the resulting opposition in coloured protest politics, was the legitimacy of coloured identity publicly contested . By 1943, with the creation of the Coloured Advisory Council (CAC), local coloured unity proved to be insufficient. A division within the ranks of the local coloured elite was evident. As a result, the expression of coloured identity still remains contested in contemporary King William's Town.
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- Date Issued: 2007
A field investigation of physical workloads imposed on harvesters in South African forestry
- Authors: Christie, Candice Jo-Anne
- Date: 2006
- Subjects: Forests and forestry -- South Africa Employees -- Workload Forest products industry -- South Africa Work -- Physiological aspects Heart rate monitoring Foresters -- South Africa -- Workload Oxygen -- Physiological transport
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:5122 , http://hdl.handle.net/10962/d1005200
- Description: The focus of this field investigation was an analysis of the work demands being placed on South African forestry workers, in particular Chainsaw Operators and Stackers. Working postures, physiological and perceptual responses were assessed on a sample of 58 workers (29 Chainsaw Operators and 29 Stackers) during a ‘normal’ working shift. Body mass was measured before and after work in order to determine dehydration levels. Polar heart rate monitors were fitted to six workers each day over a period of two weeks in order to record ‘working’ heart rates. Fluid and food intake was monitored and recorded during this initial data collection phase. The Rating of Perceived Exertion and Body Discomfort Scales were explained in Zulu, their native language, and workers were asked to rate their perceptions of effort at regular intervals during work, while areas and intensity of body discomfort was obtained on completion of work. After completing a work shift, a 30 minute ‘recovery’ period was given, thereafter a portable ergospirometer, the k4b², was attached to the worker who then participated in a progressive, submaximal step test for the purpose of establishing individual, and group, heart rate-oxygen uptake (HR/VO[subscript 2]) regressions for predicting oxygen uptake from ‘working’ heart rate responses. These procedures were repeated four weeks later following the introduction of a fluid and nutritional supplement during work which was delivered to the workers while they were executing their tasks. The results revealed awkward working postures with a predominance of trunk flexion during all the harvesting tasks; these postures, adopted for long periods during work, are very likely to lead to the development of musculoskeletal injuries. The mean working heart rates were 123.3 bt.min[superscript (-1)] and 117.6 bt.min[superscript (-1)] during chainsaw operations and stacking respectively. During the step test, the mean heart rate and oxygen uptake responses were 127.9 bt.min[superscript (-1)] and 22.9 mlO[subscript 2].kg[superscript (-1)].min[superscript (-1)] (Chainsaw Operators) and 116.9 bt.min[superscript (-1)] and 24.0 mlO[subscript 2].kg[superscript (-1)].min[superscript (-1)] (Stackers), revealing no significant difference between the ‘working’ heart rates and the heart rates recorded during the step test. Physiological responses were analyzed over the full work shift which was divided into four quarters. Heart rate and oxygen uptake were significantly higher during the last half of the Chainsaw Operators’ work shift compared to the first half. Heart rate increased from 120.7 bt.min[superscript (-1)] during the first quarter to 127.4 bt.min[superscript (-1)] during the last quarter of chainsaw operations. Likewise, oxygen uptake increased from 19.9 mlO[subscript 2].kg[superscript (-1)].min[superscript (-1)] to 22.9 mlO[subscript 2].kg[superscript (-1)].min[superscript (-1)] from the first to the last quarter of work. During stacking the heart rate (mean of 117.6 bt.min[superscript (-1)]) and oxygen uptake (mean of 24.6 ml.kg[superscript (-1)].min[superscript (-1)]) responses remained stable over the duration of the working shift. Workers lost, on average, 2.8% body mass during work while felling and cross-cutting and 3.6% during stacking. This reduced significantly to a loss of 0.4% body mass when re-tested following the introduction of water and food during the work period. Likewise, the energy deficit was significantly improved due to the introduction of a nutritional supplement. Pre-intervention the deficit was 8861.8 kJ (Chainsaw Operators) and 8804.2 kJ (Stackers) while in the post-intervention phase this deficit was reduced by approximately 50% for both groups of workers.
- Full Text:
- Date Issued: 2006
Jah children the experience of Rastafari children in South Africa as members of a minority group with particular reference to communities in the former Cape Province
- Authors: Bain, Pauline
- Date: 2004
- Subjects: Rastafari movement -- South Africa -- Eastern Cape , Rastafari movement -- South Africa -- Western Cape , Rastafari movement -- South Africa -- Northern Cape , Reggae music -- South Africa -- History and criticism , Rastafarian ethics -- South Africa , Rastafari movement -- Doctrines , Children of minorities -- South Africa -- Education , Socialization -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2087 , http://hdl.handle.net/10962/d1002650 , Rastafari movement -- South Africa -- Eastern Cape , Rastafari movement -- South Africa -- Western Cape , Rastafari movement -- South Africa -- Northern Cape , Reggae music -- South Africa -- History and criticism , Rastafarian ethics -- South Africa , Rastafari movement -- Doctrines , Children of minorities -- South Africa -- Education , Socialization -- South Africa
- Description: This thesis is an ethnography of Rastafari childhood in the former Cape Province, South Africa, through the eyes of both parents and children. If children are a ‘muted group’, then what are the identity formation implications for “double-muted” groups, the children of ethnic minorities whose voices are not heard? Rasta parents’ experience of the struggle, ie. the opposition to apartheid, has shaped the Rastafari chant of ‘equal rights’ and ‘justice’ into a distinctly South African form of protest and resistance. Their childhood experiences have resulted in a desire to provide a better life for their children, using Rastafari as a vehicle. This is expressed in a continuation of the struggle that was started during apartheid, in the Rasta ideology children grow up learning. The Rasta child has become a contested body in this struggle. The South African Government, through policy, has a mandate to protect the child, and legislature exists to do so in accordance with international law. However, as child-raising differs phenomenally from culture to culture, these goals on the part of the State start infringing upon the rights and freedoms of minorities to raise their children according to their own cultural goals. This study examines the tension between Rastafari and government with regards to child raising, specifically looking at the following main points of contestation: public health, public schools and policy/legislation; in order to examine how Rasta children negotiate their identity in the face of these conflicting messages and struggles. Their identity can be influenced by three main groups, the Rasta family they grow up in; school; and multi-media. What these children choose to accept or reject in their worldview is moderated by their own agency. This study shows that this tension results in a new generation of Rastafari children, who are strongly grounded in an identity as Rastafari and take pride in this identity. It also illustrates how Rastafari are impacting on and changing government policy through resistance. Their successes in challenging the state on the grounds of multiculturalism and religious freedom, has helped in the attainment of a sense of dignity.
- Full Text:
- Date Issued: 2004
Genetic characterization of conspecific populations of Tilapia Sparrmanii (A.Smith 1840) in the dolomitic sinkholes and springs of the North-West Province (South Africa), and their comparison to Tilapia Guinasana (Trewavas 1936)
- Authors: Nxomani, Clifford David
- Date: 2002
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4079 , http://hdl.handle.net/10962/d1007452
- Description: This study was undertaken to investigate the genetic relationships of allopatric populations of the cichlid fish, Tilapia sparrmanii (A. Smith 1840) inhabiting the sinkholes and springs of the North West Province, South Africa. It also examined the genetic relationships of T sparrmanii to its polychromatic sister species, Tilapia guinasana (Trewavas 1936) which is endemic to the Guinas sinkhole in Namibia. Finally, the study investigated whether there is a genetic basis for T guinasana's colour polymorphism. The research was prompted by the concern of conservation authorities about the possible loss of unique fauna given the high demand for use of the subterranean waters for agricultural, domestic and industrial purposes. Such demands have the potential to drain these habitats. Further concerns related to habitat destruction and the introduction of alien species in the ecosystems inhabited by both fish species. Three approaches were adopted in attempting to answer the above questions. First was the investigation of Sodium dodecylsulphate (SDS)-Polyacrylamide Gel Electrophoresis (PAGE) of total cellular proteins as a fast and relatively inexpensive indicator of genetic relatedness between the fish populations. Secondly, genetic differentiation between the T sparrmanii populations and its relationship to T guinasana were assayed using restriction endonuclease analysis of Polymerase Chain Reaction (PCR)-amplified regions of the cytochrome b gene and the d-Ioop of mitochondrial DNA, coupled with Temperature Gradient Gel Electrophoresis (TGGE) analysis of the same regions. The third approach involved the use of Random Amplified Polymorphic DNA (RAPD) fingerprinting of the populations ofT sparrmanii as an indicator of genetic differentiation between them. RAPD fingerprinting was further used to investigate the genetic relationships between T sparrmanii and T guinasana and to probe the genetic basis of the polychromatism of the latter. SDS-PAGE did not reveal any genetic differentiation between the T sparrmanii populations, nor could the analysis detect variation within them. It however clearly distinguished at a species level between T sparrmanii and T guinasana as well as between these and other fish species, thus indicating its possible utility as an indicator of genetic relatedness at a species level. Mitochondrial studies employing the Restriction Fragment Length Polymorphism (RFLP) of Polymerase Chain Reaction (PCR)-amplified cytochrome b (1.1 kb) and d-Ioop regions (0.9 kb) with six and five restriction enzymes respectively, failed to reveal genetic differences within and between the allopatric populations. TGGE of500 bp of the d-Ioop and 400 bp of the 12sRNA PCR-amplified fragments did not reveal any differences between the populations of T. sparrmanii, nor did the analysis reveal any differences between T. sparrmanii and T. guinasana. The lack of differentiation between the T. sparrmanii populations by these mitochondrial Dna analysis techniques, despite habitat fragmentation, indicated a recent origin of the populations from a common ancestral population. Failure to distinguish between T. sparrmanii and T. guinasana may be related to the sensitivity of the techniques utilized. RAPD fingerprinting analysis indicated that the populations are genetically differentiated from each other. Using a measure of coefficient of variation, the population with the highest variation was the Wondergat population (13.99%), followed by the Klerkskraal popUlation (8.29%), the Malmani and Marico Oog populations (each with 5.88%) and the least variation (4.95 and 4.83%) was with the Amalinda and Molopo Oog populations respectively. This high degree of intra population similarity points to the fact that this differentiation is still confined within the limits of con specificity. The genetic distances between all of the T. sparrmanii populations across all primers ranged from 0.09 to 0.234 and averaged 0.146, a value that falls in the upper end of conspecific population differentiation. Such results indicate populational sub-division below the species level. RAPD fingerprinting therefore proved more sensitive than protein or mitochondrial studies. The differentiation it detected between the populations is a reflection of their adaptation to local conditions of the unique ecosystems they inhabit. A comparison with a subset of primers between T. guinasana and T. sparrmanii confirmed the separate species status of the former from the latter. The mean genetic distance between the T. sparrmanii populations was 0.136, compared to that between T. sparrmanii and T. guinasana which was found to be 0.374. Statistical analysis of the difference between the mean genetic distances indicated significance with 95% confidence. The polychromatism of T guinasana was investigated to determine whether there were significant differences between its five colour morphs. RAPD fingerprinting indicated with 95% confidence that there were significant differences between the colour forms based on the genetic distances computed between them. These genetic differences appeared to correlate with the observed assortative mating between the colour forms of the species. The manifestation of the polychromatism at sexual maturity in T guinasana probably indicates that colouration plays an important role in the breeding process. The genetic uniqueness shown here between the populations of T sparrmanii and the colour forms of T guinasana indicate for protective measures to be put in place if the genetic resources of the isolated fish populations are to be preserved. These must be coupled with a thorough assessment of the temporal and spatial distribution of genetic variability of the populations as a guide to a long-term management strategy for the fish populations and the ecosystems they inhabit. This study therefore has shown that the allopatric populations of T sparrmanii in the sinkholes and springs of the North-West Province are genetically unique, as well as show that the colour forms of T guinasana are genetically distinct.
- Full Text:
- Date Issued: 2002
The role of indigenous knowledge in/for environmental education: the case of a Nguni story in the Schools Water Action Project
- Authors: Masuku, Lynette Sibongile
- Date: 1999
- Subjects: Environmental education Environmental education -- South Africa -- KwaZulu-Natal
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1749 , http://hdl.handle.net/10962/d1003633
- Description: In March 1997 an indigenous knowledge story was included by the Schools Water Action Project (SWAP)partners in a resource pack for Water Week educational activities. This research developed as the result of an interaction between myself and some of the schools while we investigated water quality within Howick in the KwaZulu Natal Midlands. An interest in understanding the role of indigenous knowledge in/for environmental education developed. Some of the teachers and students involved in the water audit were requested to share their views on the role of indigenous knowledge in/for environmental education. From here the study broadened to also include interviews with elderly community members and environmental educators involved in materials development processes. This post-positivistic case study documents the views of a small sample of interviewees using the SWAP story entitled Sweet Water as a spring board towards a better understanding of indigenous knowledge within the school context, with a particular aim to inform educational materials development processes. The study displayed that a link which exists between indigenous knowledge and environmental education needs to be brought to the fore. This is likely to happen with the blurring of boundaries between home and school as learning contexts, a process which student interviewees emphasised, along with the need for respecting values that award respect to the environment. Elderly community members were of the view that they have a role to play in addressing educational problems such as interpersonal and intercultural respect. However, the study also raised several issues around the complexities surrounding indigenous knowledge processes, including its appropriation, commodification and reification.
- Full Text:
- Date Issued: 1999