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A comprehensive review of the taxonomic diversity within the freshwater catfish genus Parauchenoglanis (Siluriformes, Auchenoglanididae)
No full textThesis embargoed. To be released early 2026.Thesis (PhD) -- Faculty of Science, Ichthyology & Fisheries Science, 202
A Protection of Personal Information Act Compliance Framework for the City of Tshwane’s Fresh Produce Market.
Get PDFThe Protection of Personal Information Act of 2013 (POPIA) is a law drafted to regulate the processing of personal information in South Africa. Its provisions include but are not limited to the usage of personal information for marketing purposes. While it was announced that enforcement of the law would commence in July 2021, many organisations are still in the process of reorganising themselves to comply with this important piece of legislation. Although the Information Regulator’s guideline document is available for utilization, organisations are struggling to develop POPIA compliance frameworks tailored to their operational requirements. As stated in section 6.2.1 of the Information Regulator’s guideline document, the act calls for the appointment of the an Information Officer by organisations who is required to develop, implement, monitor and maintain a POPIA compliance, framework. With that stated, this study aims to reports about developing a POPIA compliance framework for the City of Tshwane’s Fresh Produce Market. The study’s primary objective was to develop a POPIA compliance framework for the City of Tshwane’s Fresh Produce Market (TFPM) as a collector and processor of personal information. The study had three sub-objectives which were achieved using three research methods, namely literature review, content analysis and semi-structured interviews. Through a literature review, conditions that should be adhered to in relation to collecting and processing personal information were identified. Shifting the focus to the second sub-objective, a vigorous content analysis was performed to investigate the TFPM’s current method of collecting and processing personal information. The process involved evaluating the TFPM’s SOPs, Service Level Agreement, License Agreement, and the city of Tshwane’s Information Communication Technology Framework using the Nexia POPIA checklist. The evaluation results revealed a huge non-compliance gap with regard iii to POPIA and personal information conditions. Post development of the POPIA framework the study embarked on an expert review process with the top management of the TFPM to assess their view on the developed POPIA compliance framework.Thesis (MPhil) -- Faculty of Engineering, the Built Environment and Technology, School of Information Technology, 202
An evaluation of the effectiveness of area-based conservation intervention in avoiding biodiversity loss in South Africa
No full textHabitat degradation, livestock farming, crop cultivation, rangeland overutilization and veld mismanagement are among the factors causing biodiversity loss worldwide. Rangelands in arid and semi-arid environments are no exception, as they are under stress from conversion into cropland and pressure from livestock farming. In these arid areas, rainfall is unpredictable and plant recruitment levels low, resulting in veld rehabilitation being a potentially expensive and time-consuming undertaking for landowners. Landowners implement different rehabilitation methods to increase overall vegetation cover and prevent further soil and vegetation degradation. These rehabilitation methods may include the creation of micro-catchments, mulching, brushpacking, ripping, geotextiles, stone cobbling and erosion control fences, individually or in combination with the addition of reseeding, replanting, and use of manure or fertilizer to supplement land rehabilitation. This study investigated the significance of three rehabilitation methods (hollows, brush packing and a combination of these two methods) on water infiltration rates, soil moisture content, and vegetation canopy cover with associated growth form canopy cover over a period of 17 months (March 2021 to August 2022). This study showed that rehabilitation methods implemented had no significant impact on water infiltration rates and vegetation canopy cover. However, rehabilitation methods had a significant impact on soil moisture content. The use of a hollows is recommended when attempting to increase the soil moisture content percentage when performing rehabilitation. Overall vegetation canopy cover is influenced more by seasonal changes than by the rehabilitation methods implemented. This study indicated that the creation of micro-catchments is an effective rehabilitation method to use in an arid area, as it promotes vegetation establishment and growth.Thesis (MSc) -- Faculty of Science, School of Natural Resource Science and Management , 202
Evaluation of the toxicity of secondary metabolites in Solanum incanum L. to advance community knowledge
Get PDFThe effects of pests and the need to produce adequate food have influenced small-scale farmers in disadvantaged communities to adopt and utilise natural plant pesticides to improve harvests in many Southern African Development Communities. However, the phytochemistry associated with these indigenous plants’ pesticide activity still needs to be explored. The lack of evidence of scientific knowledge of the plant species has caused a lot of health issues among the users of indigenous plant pesticides. Solanum incanum is among the plants utilised to control cabbage aphids in Mkoba village, Zimbabwe. Solanum species are known for their steroidal compounds which comprise glycoalkaloids and saponins. This study evaluated the knowledge, opinions, and attitudes of the vegetable peasant farming community in Gweru regarding their use of the indigenous plant (S. incanum) as a pesticide. The study also reported the phytochemical profiling, structural characterisation of the isolated compounds, and biological and pesticidal activity evaluation of phytochemicals isolated from S. incanum. A descriptive survey was carried out to assess the knowledge, attitude, and practices of a conveniently sampled group of vegetable farmers in Mkoba village who use S. incanum as a pesticide. Forty-nine respondents comprised of 19 males and 30 females of ages ranging from 15 to above 60 years took part in the study by answering an open and closed-ended questionnaire. The survey revealed that parents and neighbours were instrumental in disseminating pesticidal information in the community. Brassica napus were the most grown.vegetable and vulnerable to cabbage aphids. Mixed opinions amongst the respondents varied regarding the health and environmental impact of S. incanum as a pesticide. Seventy-five percent (75%) of the respondents supported the use of S. incanum as a pesticide whilst 25% claimed that the use of S. incanum was the source of the health problems experienced in the community. The survey demonstrated that (45)91% of the farmers displayed poor practices regarding the disposal of empty pesticide containers and the use of personal protective clothing. The most prevalent symptoms in the community were skin rash, nausea, headache, and poor vision and these symptoms were common in the age group 30 to 60 years.Thesis (PhD) -- Faculty of Science, School of biomolecular and Chemical Sciences, 202
The concurrent impacts of drought and leaf harvesting on two traditional African vegetable non-timber forest product species
Get PDFInvestigating the concurrent impacts with harvesting on wild vegetables can guide their sustainable management while contributing to the understanding of such impacts on NTFP species. This study investigated leaf production, morphological and growth responses to the concurrent impacts of drought and leaf harvesting between two wild vegetables. A randomized greenhouse experiment was implemented with 1,334 plants of Amaranthus sp. and 391 of B. pilosa. A drought treatment was first implemented through six levels of drought stress and a control treatment. The harvesting treatment consisted of four harvesting levels and was implemented twice. Measurements were recorded before first and second harvests and at end of experiment. Data were separated into two periods (after first and second harvests) and analyzed using Multivariate Analysis of Variance and log-linear analysis. The results showed significant effects of drought on both species. However, Amaranthus sp. appeared more resilient to reduction in the daily amount of water than reduction in the frequency, while B. pilosa was resilient under both facets of drought stress. For Amaranthus sp., basal diameter, its growth, leaf production and survival increased with increase in the harvesting level (with some exceptions) after first harvest. After second harvest, there was decrease in plant height and leaf production. In B. pilosa, the impact was only significant on survival and leaf production (after first harvest). The effect of the interaction of the two drivers was significant for Amaranthus sp., but not for B. pilosa. The results also highlighted the possible negative impact of a prolonged high rate harvesting on the species performance, especially under severe drought. Basal diameter, its growth, survival and leaf production appeared more resilient to reduced amounts of watering in Amaranthus sp., and under both types of drought stress for B. pilosa. This suggests that both species could be sustained under medium drought stress
Performance management of the academic staffs in Ugandan public and private universities
Get PDFThis study, at the outset, seeks to assess the effectiveness of a performance management system (PMS) in determining the academic staffs‟ performance in teaching and research in selected Ugandan public and private universities. The participants of this study comprised full-time and parttime academic staffs from public and private universities located in the four regions in Uganda. The purposive sampling method was used to select the universities for this study. Convenient sampling was used to select the academic staffs in the universities. An online structured questionnaire collected quantitative data and analysed it using descriptive and inferential statistics. The quantitative analysis of the responses showed that many participants were made up of public university academic staffs, lecturers, assistant lecturers, master‟s degree holders and permanent fulltime staffs. Factor analyses were run for each section and sub-section within the questionnaire to explore the dimensionality of the scales and generate composite factor scores to be used for further analyses. While, internal consistency was examined using Cronbach‟s alpha. In addition, descriptive statistics for the factors within sections were determined. Pearson‟s correlation coefficients were calculated for each pair of factor scores for each section and sub-section to explore the relationships between the factors identified in this study. Additionally, the comparison of factor scores across selected demographic variables and independent samples t-tests for the equality of means was used to establish whether there were significant differences between the factor scores of various demographic variables. Finally, one-way ANOVAs were considered to compare the composite factor scores across various demographic variables. Factor score analysis showed that 44.9% of the academic staffs had a moderate attitude towards the PMS process; whereas 84.9% had a high attitude towards PA criteria and 64.2% had a high attitude towards PFPS. The results of the study suggest a high attitude of the academic staffs towards PA and PFP in teaching and research. In addition, the majority (78.0%) of the academic staffs had a high attitude towards their self-performance planning in their institution. The results of the study suggest a high level of self-performance planning of the academic staffs in teaching and research in the selected Ugandan HEIs. A reasonable number (45.4%) of the academic staffs from public universities and 49.1% from private universities had a high attitude towards supervisors‟ participation in performance planning and performance feedback. Moreover, 44.0% of the academic staffs from public universities and 66.7% of the academic staffs from private universities rated the workload as high. The results of the study suggest that the academic staffs‟ workload was high. In xx addition, factor score analysis showed that the academic staffs‟ performance rewards were low. Only 24.9% of the academic staffs had received more than 67% of the available rewards suggesting that the academic staffs‟ managers in the surveyed institutions did not use a variety of performance rewards to compensate for the academic staffs‟ performance. In addition, the average factor score for teaching skills was 94.8%, while perceived teaching abilities were 95.1% high on average. Besides, the factor score analysis results showed that teaching skills were 84.81% and 86.34%, respectively. Only 29.1% of the academic staffs from both public and private universities had high research skills. The results suggested that the academic staffs‟ teaching skills were high while their research skills were low. The findings thus suggested that the academic staffs in Ugandan public and private universities were highly involved in teaching activities, but their involvement in research activities was low. Similarly, results from testing hypotheses suggested that academic staffs in the surveyed Ugandan public and private universities rated PA criteria and PFPS higher than the PMS process. The study results indicated that self-performance planning and supervisors‟ involvement in performance feedback improved academic staffs‟ teaching skills. In contrast, performance planning, review, clarity on feedback, evaluation and rewards increased academic staffs‟ performance in perceived teaching abilities. In addition, an increase in the research workload contributed to an increase in the academic staffs‟ perception of their research knowledge and skills. The study made major conclusions regarding academic staffs‟ PM in Ugandan public and private universities. First, correlation results on performance planning and teaching skills and abilities for public and private universities were statistically significant (p < 0.001). Therefore, the study concludes that the academic staffs‟ performance planning in the selected Ugandan HEIs positively affected the academic staffs‟ performance in teaching. In addition, correlation results for supervisor involvement in feedback and teaching skills for both public and private universities were statistically significant (p < 0.001). Thus, the study concludes that supervisors‟ involvement in feedback improved academic staffs‟ performance in teaching skills. In addition, correlation results showed that performance reviews and teaching abilities were statistically significant for public universities (p=0.001), and (p=0.034) for private universities. Thus, the study concludes that the academic staffs‟ performance reviews improved academic staffs‟ teaching abilities in selected public and private universities. Equally, correlation results for performance evaluation and perceived teaching abilities for public universities was statistically significant (p< 0.001) for public universities, and (p=0.006) for private universities. Therefore, the study concludes that performance evaluation increased xxi teaching abilities of the academic staffs in both Ugandan public and private universities. In addition, rewards significantly impacted academic staffs‟ perceived teaching abilities in private universities. Correlation results for rewards and perceived teaching abilities for private universities was statistically significant (p< 0.011). Therefore, the study concludes that the more academic staffs were rewarded, the more they participated in setting, administering and marking tests, assisgnments and examinations, and adhering to deadlines set for administering tests and assignments. Similarly, the study made various recommendations to improve academic staffs‟ performance in teaching and research in Ugandan public and private universities. To achieve the required performance in teaching and research, the study recommends that the academic staffs be involved in the entire planning process to be aware of the required performance and the kind of results expected from their performance and work towards achieving the set performance in teaching and research. Additionally, performance reviews and feedback should be one-on-one discussions between the managers and the academic staffs to identify how far the staffs are performing towards the set goals. The study recommends that the academic staffs need information regarding their performance for feedback to be effective. In addition, the study recommends that the academic staffs‟ managers should increase financial and non-financial rewards to motivate the academic staffs to increase their performance in teaching. Correlation results showed that rewards had a significant impact on teaching abilities (p=0.011). Thus, rewards should as well be increased to improve academic staffs‟ teaching abilities.Thesis (PhD) -- Faculty of Education, School of Research and Engagement, 202
The link between behavioural plasticity and aerobic scope phenotypes in predicting the survival of Chrysoblephus laticeps under climate variability
Get PDFThermal variability in the marine environment is likely to have a considerable effect on fishes as it impacts physiological performance and vital (i.e metabolism, foraging and swimming style) and non-vital (i.e. reproductive fitness) energetic processes. When fish are subjected to thermal stress, they may primarily respond by changing their behaviour. Species that have broad phenotypic behavioural plasticity (i.e. defined as the ability to adjust behavioural activity in presiding environmental conditions in order to remain within their optimal thermal range) may have a competitive advantage. Fish behavioural plasticity may take many forms. Some species may seek out thermal refugia by changing their phenology or distribution, while others alter the timing of their seasonal and spawning migrations in response to a changing environment. Although fishes can use behavioural changes to cope with climate change impacts, there does appear to be variability in the behavioural responses within species. However, if alterations in behaviour are insufficient to ensure that the individual remains within their optimal thermal range, physiological acclimation (i.e. defined as the process in which an organism adjusts to prevailing conditions by broadening their thermal performance curve so that their performance is maximized in the new thermal environment) may be required. Therefore, there is a critical link between the behaviour and thermal physiology of fishes, particularly in a world where they are facing increasing thermal stress.Thesis (PhD) -- Faculty of Science, Ichthyology and Fisheries Science, 202
Associations between contraceptive use, physical activity, depression, and quality of life among women of childbearing age in Akure South Local Government area of Ondo State, Nigeria
Get PDFBackground: Population experts and policymakers are concerned about Nigeria's rapid annual population growth due to the country's high birth rate which was 5.3 births per woman in 2018. Fear of the side effects of modern contraceptives among Nigerian women contributes to the low rate of contraceptive use, which was reported to be 17% and 37% among married and sexually active unmarried women, respectively. Which is a significant cause of the high birth rate. Although the side effects of modern contraceptives on women's clinical and physiological variables are well known, studies examining the associations between contraceptive use and physical and psychosocial variables such as physical activity (PA), depression, and quality of life (QoL) in non-athletic Nigerian women of reproductive age are scarce. This study aimed to examine the associations between contraceptive use, PA, depression, and QoL among non-athletic women of childbearing age in Akure South Local Government, Ondo State, Nigeria. Methods: In a descriptive cross-sectional study, 646 women of childbearing age were recruited using the multistage sampling technique. The data of 496 current contraceptive users and 146 non-users were analysed, as 4 respondents did not respond regarding current contraceptive use status. The Global PA Questionnaire (GPAQ), Beck’s Depression Inventory (BDI) and World Health QoL Organization Quality of Life Brief (WHOQoL BREF) were used to assess respondents’ scores/levels of PA, depression and health-related quality of life (HRQoL). The GPAQ, BDI, and WHOQOL scores were compared between contraceptive users and non-users using non-parametric Quade Analysis of Covariance while age, married status, tribe, religion, and occupation were included covariates. PA, sedentary behaviour (SB), and BDI scores were categorized using guidelines. Contraceptive use/practice was the outcome variable. Pearson's chi-square test bivariate analysis and a multivariate logistic model were used to identify factors associated with contraceptive use (users and non-users). Crude and adjusted odds ratios and their confidence intervals were calculated to determine the significance of the association. The regression model was adjusted for age, marital status, religion, tribe, highest education level, occupation, awareness of contraceptives, current use, lifetime use, type, class, and duration of current contraception. “Statistical significance was set at p < 0.05. Results: The mean age of the respondents was 29.73±6.10 years. The contraceptive users and non-users were not significantly different regarding their ages (p = 0.135), marital status (p = 0.245), highest education (p = 0.444), occupation (p = 0.238), and tribe (p = 0.192). The respondents’ lifetime and point prevalence of contraceptive uptake was 93.6% and 77.3%, respectively, while 72 (12.8%) reported experiencing contraception-related side effects. Of the 496 respondents who currently practice contraception, 146 (29.4%) were hormonal contraceptive users. The majority of the respondents had moderate and mild levels of PA (48.5%) and depression (51.4%), respectively, and a significantly higher proportion of contraceptive users had minimal and moderate depression levels than the non-users (p = 0.018). The contraceptive users demonstrated significantly higher median scores of BDI (p = 0.02), Physical health QoL (p < 0.001), environment QoL (p = 0.033) and overall QoL (0.004) than the non-users. Hormonal contraceptive users had significantly higher median PA walking/bicycling scores than non-hormonal users (p = 0.014). Respondents with mild and moderate depression levels had higher odds of being contraceptive users than those with minimal depression (AOR = 3.12, 95% CI = 1.43 – 6.80, p = 0.04 and 4.67, 95% CI = 1.92 – 11.36, p = 0.001 respectively). Conclusion: Contraceptive use is negatively associated with depression but positively related to Physical health, environment and overall domains of HRQoL. Healthcare professionals should consider women's mental and emotional condition while advising on family planning for optimal HRQoL.Thesis (MSc) -- Faculty of Science, Human Kinetics and Ergonomics, 202
Giving a voice and holding to account: a critical civic and democratic discourse analysis of The Big Debate South Africa TV show’s opportunities for ‘Political Listening’
Get PDFThe television studio debate genre was initially inspired by the 1960s television news coverage that captured the zeitgeist of American political campaigns and elections, which featured prominent political figures. The genre has since been adapted by broadcast networks around the world to facilitate politically-charged public discussions that allow ordinary people to pose significant questions and express their concerns or cynicism to the political elites in power. The Big Debate South Africa is a popular televised town hall debate show that began airing in 2009 on eMedia Investment’s eNCA and later on the SABC. During its ninth-season run, the show attracted an audience of up to 12 million. The programme is formatted to give South African citizens a voice to hold state leaders to account. Anthea Garman and Herman Wasserman’s (2014) research on citizenship and media in a democratic society, asserts that the media’s contribution to citizenship is often a way to encourage citizens to exercise their influence over political decisions and dialogue in an overt manner. Through observations and qualitative in-depth interviews, this tightly focused study analysed the third episode of The Big Debate South Africa’s ninth season, hosted by journalist and broadcaster Redi Tlhabi. It explored the show’s format and discourse to investigate how it creates opportunities for the practice of Susan Bickford’s (1996) conception of ‘political listening’ within the confines of hierarchical binary oppositions (‘Us and Them’ and ‘lay’/‘expert’). By deconstructing how civil society organisations, activists and citizens (‘lay’) interact with the political elites (‘experts’), this study chronicled how the show mediates these binary oppositions with an anticipation for them to collectively hear each other out. In examining the show’s structure as a participative civic political broadcast talk platform that promotes democratic deliberation, this study ultimately demonstrated the capacity of The Big Debate South Africa to pluralise democratic life in its practice of ‘political listening’. While the show advances equality and amplifies marginalised voices, this research also found that these significant practices seemingly only held temporary effects once the cameras shut down.Thesis (MA) -- Faculty of Humanities, Journalism and Media Studies, 202
Leadership skills required by construction project managers to deliver projects successfully
Get PDFThe study aimed to affirm the appropriate leadership skills required of a project manager for a successful construction project. The study investigated the most prominent leadership skills among the City of Cape Town project managers, the most prominent project success factors, and the relationship between the prominent leadership skills and project success factors. Lastly, it determined the strategy to be used to enhance the leadership skills of the City of Cape Town construction project managers. The research was established upon the problem statement from which the sub-questions and hypotheses were derived. The research followed the explanatory sequential mixed method whereby primary data was first collected through a quantitative method and followed by a qualitative method. A pragmatism paradigm philosophy was used for its flexibility to combine both quantitative and qualitative research. The deductive and inductive approaches were used because they suited both qualitative and quantitative data. The research survey determined that communication is the most prominent leadership skill among the City of Cape Town project managers. Concerning the project success factor, quality was identified to be the most prominent project success factor among the City of Cape Town construction projects. The Pearson correlation analysis was subsequently undertaken to determine whether there is a relationship between leadership skills and project success factors. The results illustrated a strong and positive relationship between leadership skills and project success, indicating leadership skills lead to project success. The qualitative research portion of the study investigated what strategy can be implemented to enhance the leadership skills of City of Cape Town project managers. The findings confirmed that training and support-structure strategies are appropriate to improve a construction project manager’s leadership skills and that training does not guarantee good leadership performance; however, applying the training, monitoring, and mentoring leads to good leadership performance. The study also revealed that a support structure involves utilising consultants who are leadership experts. Recruiting professional officers for all departments within the City who would work in conjunction with project managers and senior managers is another form of a support structure to be used. Lastly, setting up one-on-one support sessions with project managers can also be useful. Every construction project manager needs to have leadership skills, and it is therefore recommended that the City choose a suitable strategy; however, combining the above strategies is also possible.Thesis (MSc) -- Faculty of Engineering, School of the Built Environment and Technology, 202