Evaluation of microinsurance distribution strategy at the bottom of the pyramid by Liberty Life Swaziland
- Authors: Lukhele, Mlungisi Reginald
- Date: 2015
- Language: English
- Type: text , Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10962/54474 , vital:26568
- Description: This is a qualitative study which focuses on how Liberty Life Swaziland distributes microinsurance to the bottom of the pyramid within Swaziland. Using stratified purposive sampling, this study identified 5 managers within Liberty Life and 4 managers from brokerages and affinity partners who had a minimum of 3 years’ experience in distribution of microinsurance. Semi-structured and in-depth interviews were conducted by the researcher with these managers. Interviews were stopped when there was data saturation. To induce emerging themes from the data, open-coding and constant comparison technique was used. Findings in this study reveal that to distribute microinsurance to low income households, Liberty Life objectives are to; (1) provide relevant solutions in a cost effective manner, thus keeping premiums as affordable as possible, (2) provide simple products which are easy to understand by customers, (3) make services accessible, and (4) make doing business easy. In this regard, Liberty Life distribution strategy is to partner with bulk retailing entities that have a client base they already service and benefit from nationwide presence and infrastructure. Lastly, the perspectives of both internal and external stakeholders in microinsurance are discussed to evaluate the challenges and successes experienced in implementing the distribution strategy. This study is valuable to critically understand the current distribution strategy from the viewpoint of key intermediaries, but also pinpoint how efforts to achieve microinsurance distribution objectives can be enhanced. Lastly, the study recommends that; a selection criteria be set for distribution partners, partnership with mobile network operators, investment in continuous training of distribution partners and knowledge sharing between Liberty and intermediaries to cease the opportunity at the bottom of the pyramid.
- Full Text:
- Date Issued: 2015
- Authors: Lukhele, Mlungisi Reginald
- Date: 2015
- Language: English
- Type: text , Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10962/54474 , vital:26568
- Description: This is a qualitative study which focuses on how Liberty Life Swaziland distributes microinsurance to the bottom of the pyramid within Swaziland. Using stratified purposive sampling, this study identified 5 managers within Liberty Life and 4 managers from brokerages and affinity partners who had a minimum of 3 years’ experience in distribution of microinsurance. Semi-structured and in-depth interviews were conducted by the researcher with these managers. Interviews were stopped when there was data saturation. To induce emerging themes from the data, open-coding and constant comparison technique was used. Findings in this study reveal that to distribute microinsurance to low income households, Liberty Life objectives are to; (1) provide relevant solutions in a cost effective manner, thus keeping premiums as affordable as possible, (2) provide simple products which are easy to understand by customers, (3) make services accessible, and (4) make doing business easy. In this regard, Liberty Life distribution strategy is to partner with bulk retailing entities that have a client base they already service and benefit from nationwide presence and infrastructure. Lastly, the perspectives of both internal and external stakeholders in microinsurance are discussed to evaluate the challenges and successes experienced in implementing the distribution strategy. This study is valuable to critically understand the current distribution strategy from the viewpoint of key intermediaries, but also pinpoint how efforts to achieve microinsurance distribution objectives can be enhanced. Lastly, the study recommends that; a selection criteria be set for distribution partners, partnership with mobile network operators, investment in continuous training of distribution partners and knowledge sharing between Liberty and intermediaries to cease the opportunity at the bottom of the pyramid.
- Full Text:
- Date Issued: 2015
Short-term changes to the life history of shad, Pomatomus saltatrix (Perciformes: Pomatomidae), in Southern Angola
- Authors: Bealey, Roy Steven John
- Date: 2015
- Subjects: Shad -- Angola , Bluefish -- Angola , Bluefish -- Climatic factors -- Angola , Bluefish -- Effect of temperature on -- Angola , Bluefish -- Effect of global warming on -- Angola , Bluefish -- Effect of fishing on -- Angola , Bluefish -- Life cycles , Pomatomidae -- Angola , Fishery management -- Angola , Climatic changes -- Angola
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5379 , http://hdl.handle.net/10962/d1017211
- Description: A general lack of biological information is hampering the effective management of Angola’s fisheries. While this lack of information is largely a result of the country’s extended civil war that ended in 2002, the subsequent rapid expansion of fisheries is most likely impacting fish abundance and influencing the biology of this regions fishes. Besides the influence of fisheries, the southern Angolan coastal region is considered to be a climate change “hotspot” due to rapidly (>0.8°C/decade) increasing water temperatures. These changes are thought to drive further changes to the biology of fishes. It is therefore critical to provide baseline biological information and to identify the impacts of exploitation and warming on the biology of southern Angolan fishes. Pomatomus saltatrix is a warm-temperate marine fish species that forms an important component of fisheries throughout its broad distribution. P. saltatrix is a migratory predator that displays variable growth and maturity schedules. Typically it is heavily targeted in a range of coastal fisheries of Angola and is therefore an ideal candidate to study the biological impacts of exploitation and climate change. The aim of this study was to provide the first description of P. saltatrix biology in Angola and examine recent changes of the species biological parameters in an attempt to uncouple fishery driven from climate driven changes. Samples of P. saltatrix were collected monthly using standardised biological methods from June 2005 to December 2006 (period 1) and from June 2012 to February 2013 (period 2). The average (508mm – 1st period, 462mm – 2nd period) and maximum (760mm – 1st period, 746mm – 2nd period) size of P. saltatrix was smaller during the second period to suggest selective overharvesting of large individuals by developing fisheries. Angolan P. saltatrix grew very rapidly in their first year and thereafter, relatively slowly when compared to other populations globally. However, fish grew faster (ω = 103 – 1st period, ω = 124 – 2nd period), matured at a larger size (303mm - 1st period, 336mm - 2nd period) and younger age (0.83 years - 1st period, 0.67 years – 2nd period) during the second period. Peaks in reproductive activity remained similar (November) during both periods but a temperature anomaly appears to have influenced spawning during period 2. Sardinella aurita was the dominant prey during both periods but a greater dependence upon mugilids was observed during the second period. Although the changes in life history were not statistically significant, the faster growth observed during period two could be attributed to both increasing temperature and/or exploitation. Fishes generally grow faster, mature smaller and attain a smaller maximum size in warmer temperatures. Fisheries targeting small and large specimens of a species (as observed in this study) largely have the same impacts as ocean warming. With rapidly increasing water temperatures and exploitation rates, faster growth and earlier maturation of P. saltatrix populations will mitigate the impacts of exploitation in the short-term. However, the sustainability of Angola’s P. saltatrix stock is questionable as phenotypic adaptation will have a limited thermal scope and overexploitation will, like in all fisheries, negatively influence recruitment. Ultimately, strict monitoring, regulation and control will be necessary to ensure the sustainability of the P. saltatrix resource in Angola as it continues to face increasing anthropogenic and environmental pressures. Management guidelines and future research suggestions are therefore outlined with reference to the results of analyses conducted during this study.
- Full Text:
- Date Issued: 2015
- Authors: Bealey, Roy Steven John
- Date: 2015
- Subjects: Shad -- Angola , Bluefish -- Angola , Bluefish -- Climatic factors -- Angola , Bluefish -- Effect of temperature on -- Angola , Bluefish -- Effect of global warming on -- Angola , Bluefish -- Effect of fishing on -- Angola , Bluefish -- Life cycles , Pomatomidae -- Angola , Fishery management -- Angola , Climatic changes -- Angola
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5379 , http://hdl.handle.net/10962/d1017211
- Description: A general lack of biological information is hampering the effective management of Angola’s fisheries. While this lack of information is largely a result of the country’s extended civil war that ended in 2002, the subsequent rapid expansion of fisheries is most likely impacting fish abundance and influencing the biology of this regions fishes. Besides the influence of fisheries, the southern Angolan coastal region is considered to be a climate change “hotspot” due to rapidly (>0.8°C/decade) increasing water temperatures. These changes are thought to drive further changes to the biology of fishes. It is therefore critical to provide baseline biological information and to identify the impacts of exploitation and warming on the biology of southern Angolan fishes. Pomatomus saltatrix is a warm-temperate marine fish species that forms an important component of fisheries throughout its broad distribution. P. saltatrix is a migratory predator that displays variable growth and maturity schedules. Typically it is heavily targeted in a range of coastal fisheries of Angola and is therefore an ideal candidate to study the biological impacts of exploitation and climate change. The aim of this study was to provide the first description of P. saltatrix biology in Angola and examine recent changes of the species biological parameters in an attempt to uncouple fishery driven from climate driven changes. Samples of P. saltatrix were collected monthly using standardised biological methods from June 2005 to December 2006 (period 1) and from June 2012 to February 2013 (period 2). The average (508mm – 1st period, 462mm – 2nd period) and maximum (760mm – 1st period, 746mm – 2nd period) size of P. saltatrix was smaller during the second period to suggest selective overharvesting of large individuals by developing fisheries. Angolan P. saltatrix grew very rapidly in their first year and thereafter, relatively slowly when compared to other populations globally. However, fish grew faster (ω = 103 – 1st period, ω = 124 – 2nd period), matured at a larger size (303mm - 1st period, 336mm - 2nd period) and younger age (0.83 years - 1st period, 0.67 years – 2nd period) during the second period. Peaks in reproductive activity remained similar (November) during both periods but a temperature anomaly appears to have influenced spawning during period 2. Sardinella aurita was the dominant prey during both periods but a greater dependence upon mugilids was observed during the second period. Although the changes in life history were not statistically significant, the faster growth observed during period two could be attributed to both increasing temperature and/or exploitation. Fishes generally grow faster, mature smaller and attain a smaller maximum size in warmer temperatures. Fisheries targeting small and large specimens of a species (as observed in this study) largely have the same impacts as ocean warming. With rapidly increasing water temperatures and exploitation rates, faster growth and earlier maturation of P. saltatrix populations will mitigate the impacts of exploitation in the short-term. However, the sustainability of Angola’s P. saltatrix stock is questionable as phenotypic adaptation will have a limited thermal scope and overexploitation will, like in all fisheries, negatively influence recruitment. Ultimately, strict monitoring, regulation and control will be necessary to ensure the sustainability of the P. saltatrix resource in Angola as it continues to face increasing anthropogenic and environmental pressures. Management guidelines and future research suggestions are therefore outlined with reference to the results of analyses conducted during this study.
- Full Text:
- Date Issued: 2015
Pseudo-random access compressed archive for security log data
- Authors: Radley, Johannes Jurgens
- Date: 2015
- Subjects: Computer security , Information storage and retrieval systems , Data compression (Computer science)
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4723 , http://hdl.handle.net/10962/d1020019
- Description: We are surrounded by an increasing number of devices and applications that produce a huge quantity of machine generated data. Almost all the machine data contains some element of security information that can be used to discover, monitor and investigate security events.The work proposes a pseudo-random access compressed storage method for log data to be used with an information retrieval system that in turn provides the ability to search and correlate log data and the corresponding events. We explain the method for converting log files into distinct events and storing the events in a compressed file. This yields an entry identifier for each log entry that provides a pointer that can be used by indexing methods. The research also evaluates the compression performance penalties encountered by using this storage system, including decreased compression ratio, as well as increased compression and decompression times.
- Full Text:
- Date Issued: 2015
- Authors: Radley, Johannes Jurgens
- Date: 2015
- Subjects: Computer security , Information storage and retrieval systems , Data compression (Computer science)
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4723 , http://hdl.handle.net/10962/d1020019
- Description: We are surrounded by an increasing number of devices and applications that produce a huge quantity of machine generated data. Almost all the machine data contains some element of security information that can be used to discover, monitor and investigate security events.The work proposes a pseudo-random access compressed storage method for log data to be used with an information retrieval system that in turn provides the ability to search and correlate log data and the corresponding events. We explain the method for converting log files into distinct events and storing the events in a compressed file. This yields an entry identifier for each log entry that provides a pointer that can be used by indexing methods. The research also evaluates the compression performance penalties encountered by using this storage system, including decreased compression ratio, as well as increased compression and decompression times.
- Full Text:
- Date Issued: 2015
Using risk mitigation approaches to define the requirements for software escrow
- Authors: Rode, Karl
- Date: 2015
- Subjects: Escrows , Source code (Computer Science)
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4714 , http://hdl.handle.net/10962/d1017936
- Description: Two or more parties entering into a contract for service or goods may make use of an escrow of the funds for payment to enable trust in the contract. In such an event the documents or financial instruments, the object(s) in escrow, are held in trust by a trusted third party (escrow provider) until the specified conditions are fulfilled. In the scenario of software escrow, the object of escrow is typically the source code, and the specified release conditions usually address potential scenarios wherein the software provider becomes unable to continue providing services (such as due to bankruptcy or a change in services provided, etc.) The subject of software escrow is not well documented in the academic body of work, with the largest information sources, active commentary and supporting papers provided by commercial software escrow providers, both in South Africa and abroad. This work maps the software escrow topic onto the King III compliance framework in South Africa. This is of value since any users of bespoke developed applications may require extended professional assistance to align with the King III guidelines. The supporting risk assessment model developed in this work will serve as a tool to evaluate and motivate for software escrow agreements. It will also provide an overview of the various escrow agreement types and will transfer the focus to the value proposition that they each hold. Initial research has indicated that current awareness of software escrow in industry is still very low. This was evidenced by the significant number of approached specialists that declined to participate in the survey due to their own admitted inexperience in applying the discipline of software escrow within their companies. Moreover, the participants that contributed to the research indicated that they only required software escrow for medium to highly critical applications. This proved the value of assessing the various risk factors that bespoke software development introduces, as well as the risk mitigation options available, through tools such as escrow, to reduce the actual and residual risk to a manageable level.
- Full Text:
- Date Issued: 2015
- Authors: Rode, Karl
- Date: 2015
- Subjects: Escrows , Source code (Computer Science)
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4714 , http://hdl.handle.net/10962/d1017936
- Description: Two or more parties entering into a contract for service or goods may make use of an escrow of the funds for payment to enable trust in the contract. In such an event the documents or financial instruments, the object(s) in escrow, are held in trust by a trusted third party (escrow provider) until the specified conditions are fulfilled. In the scenario of software escrow, the object of escrow is typically the source code, and the specified release conditions usually address potential scenarios wherein the software provider becomes unable to continue providing services (such as due to bankruptcy or a change in services provided, etc.) The subject of software escrow is not well documented in the academic body of work, with the largest information sources, active commentary and supporting papers provided by commercial software escrow providers, both in South Africa and abroad. This work maps the software escrow topic onto the King III compliance framework in South Africa. This is of value since any users of bespoke developed applications may require extended professional assistance to align with the King III guidelines. The supporting risk assessment model developed in this work will serve as a tool to evaluate and motivate for software escrow agreements. It will also provide an overview of the various escrow agreement types and will transfer the focus to the value proposition that they each hold. Initial research has indicated that current awareness of software escrow in industry is still very low. This was evidenced by the significant number of approached specialists that declined to participate in the survey due to their own admitted inexperience in applying the discipline of software escrow within their companies. Moreover, the participants that contributed to the research indicated that they only required software escrow for medium to highly critical applications. This proved the value of assessing the various risk factors that bespoke software development introduces, as well as the risk mitigation options available, through tools such as escrow, to reduce the actual and residual risk to a manageable level.
- Full Text:
- Date Issued: 2015
Recent developments in banking supervision and the soundness of the financial system : a comparative study of South Africa, Brazil and China
- Authors: Gutu, Taurai Fortune
- Date: 2015
- Subjects: Basel III (2010) , Bank management -- South Africa , Bank management -- Brazil , Bank management -- China , Global Financial Crisis, 2008-2009 , Ratio analysis , Liquidity (Economics)
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:1130 , http://hdl.handle.net/10962/d1020892
- Description: While the 2008 financial crisis has come and gone, its effects on the global financial sector still show. Globalisation has since changed the way that banks do business, and increased competitiveness and with it the level of risk within the international banking community. Therefore, because of these prolonged effects of the financial crisis and the rise in the level of risk in banking, regulators deemed it fit to make the global financial sector safer and sounder. As a result, the BASEL III Capital Accord was introduced with tighter capital adequacy and liquidity ratio requirements; as well as also introducing the leverage ratio. In this paper, through the study of the rules and regulations on banks in South Africa, Brazil and China, it was discovered that all three countries have since begun the implementation of the new Accord as from January 2013. While preparatory measures may be different, there is a general sense of regulatory alignment among the three countries. By analysing the capital adequacy, liquidity and leverage ratios of the three countries, it was also established that these ratios are interconnected, with the capital adequacy ratio being the most important one. The study concludes that, with proper implementation of these ratios and effective management, countries implementing the BASEL III regulations would be in a stronger position to achieve soundness in their banking systems. , Gutu, Taurai Fortunate
- Full Text:
- Date Issued: 2015
- Authors: Gutu, Taurai Fortune
- Date: 2015
- Subjects: Basel III (2010) , Bank management -- South Africa , Bank management -- Brazil , Bank management -- China , Global Financial Crisis, 2008-2009 , Ratio analysis , Liquidity (Economics)
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:1130 , http://hdl.handle.net/10962/d1020892
- Description: While the 2008 financial crisis has come and gone, its effects on the global financial sector still show. Globalisation has since changed the way that banks do business, and increased competitiveness and with it the level of risk within the international banking community. Therefore, because of these prolonged effects of the financial crisis and the rise in the level of risk in banking, regulators deemed it fit to make the global financial sector safer and sounder. As a result, the BASEL III Capital Accord was introduced with tighter capital adequacy and liquidity ratio requirements; as well as also introducing the leverage ratio. In this paper, through the study of the rules and regulations on banks in South Africa, Brazil and China, it was discovered that all three countries have since begun the implementation of the new Accord as from January 2013. While preparatory measures may be different, there is a general sense of regulatory alignment among the three countries. By analysing the capital adequacy, liquidity and leverage ratios of the three countries, it was also established that these ratios are interconnected, with the capital adequacy ratio being the most important one. The study concludes that, with proper implementation of these ratios and effective management, countries implementing the BASEL III regulations would be in a stronger position to achieve soundness in their banking systems. , Gutu, Taurai Fortunate
- Full Text:
- Date Issued: 2015
Investigating quality in Education through the use of an active learning framework : the case of an intervention in the Namibian Environmental Studies curriculum
- Authors: Jacobs, Nicola Clara
- Date: 2015
- Subjects: Environmental education -- Study and teaching -- Activity programs -- Namibia -- Windhoek , Active learning -- Namibia -- Windhoek , Education -- Evaluation
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:2058 , http://hdl.handle.net/10962/d1019803
- Description: The study was conducted to explore the relationship between active learning processes emerging from the use of O’Donoghue’s (2001) active learning framework and a series of education quality indicators proposed by Nikel and Lowe (2010). To achieve this aim a professional educational intervention was conducted encouraging the use of this active learning framework in the Namibian Environmental Studies Curriculum, in order to strengthen educational quality within the Environmental Studies Curriculum. The research was conducted in the Windhoek region at the school where I am currently teaching. Four teachers took part in this study, including myself in the role of a participantobserver. The active learning framework was used to guide us in the planning and presentations of environmental learning lessons. The study was conducted within the interpretive paradigm and was qualitative in nature as well as focusing on a quantitative aspect to analyse some of the data (learners’ written work). Qualitative data were generated through individual interviews, focus-group discussions, lesson observations and document analysis. The key findings of the study were that: a) prior to the intervention with the active learning framework the teachers who took part in the study did not ask learners to explore environmental issues in the environment or to respond to particular environmental issues; b) active learning processes have the potential to facilitate the exploration of environmental issues in the environment, and responses to particular environmental issues. Active learning also have the potential to strengthen all aspects of education quality indicated in Nikel and Lowe’s (2010) quality model, namely effectiveness, efficiency, equity, relevance, responsiveness, reflexivity and sustainability; c) the active learning framework encouraged teachers to use a variety of situated learning approaches, such as the collaborative method, the cooperative method, the problem-solving method and the enquiry method, in order to strengthen the educational quality in Environmental Studies classrooms; and d) teachers find the active learning framework useful as a tool for planning and presenting environmental learning lessons. The findings of the study have the potential to inform curriculum developers, materials developers and educators with an interest in improving education quality through environmental learning processes within the Environmental Studies Curriculum in Namibia. Furthermore, Nikel and Lowe’s education quality indicators provided an informative and comprehensive understanding of education quality and provided a useful tool in evaluating and reflecting on education quality as well as my own work as a teacher.
- Full Text:
- Date Issued: 2015
- Authors: Jacobs, Nicola Clara
- Date: 2015
- Subjects: Environmental education -- Study and teaching -- Activity programs -- Namibia -- Windhoek , Active learning -- Namibia -- Windhoek , Education -- Evaluation
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:2058 , http://hdl.handle.net/10962/d1019803
- Description: The study was conducted to explore the relationship between active learning processes emerging from the use of O’Donoghue’s (2001) active learning framework and a series of education quality indicators proposed by Nikel and Lowe (2010). To achieve this aim a professional educational intervention was conducted encouraging the use of this active learning framework in the Namibian Environmental Studies Curriculum, in order to strengthen educational quality within the Environmental Studies Curriculum. The research was conducted in the Windhoek region at the school where I am currently teaching. Four teachers took part in this study, including myself in the role of a participantobserver. The active learning framework was used to guide us in the planning and presentations of environmental learning lessons. The study was conducted within the interpretive paradigm and was qualitative in nature as well as focusing on a quantitative aspect to analyse some of the data (learners’ written work). Qualitative data were generated through individual interviews, focus-group discussions, lesson observations and document analysis. The key findings of the study were that: a) prior to the intervention with the active learning framework the teachers who took part in the study did not ask learners to explore environmental issues in the environment or to respond to particular environmental issues; b) active learning processes have the potential to facilitate the exploration of environmental issues in the environment, and responses to particular environmental issues. Active learning also have the potential to strengthen all aspects of education quality indicated in Nikel and Lowe’s (2010) quality model, namely effectiveness, efficiency, equity, relevance, responsiveness, reflexivity and sustainability; c) the active learning framework encouraged teachers to use a variety of situated learning approaches, such as the collaborative method, the cooperative method, the problem-solving method and the enquiry method, in order to strengthen the educational quality in Environmental Studies classrooms; and d) teachers find the active learning framework useful as a tool for planning and presenting environmental learning lessons. The findings of the study have the potential to inform curriculum developers, materials developers and educators with an interest in improving education quality through environmental learning processes within the Environmental Studies Curriculum in Namibia. Furthermore, Nikel and Lowe’s education quality indicators provided an informative and comprehensive understanding of education quality and provided a useful tool in evaluating and reflecting on education quality as well as my own work as a teacher.
- Full Text:
- Date Issued: 2015
The effect of strike action on the value and volatility of the South African Rand
- Authors: Gordon, Ross Patrick
- Date: 2015
- Subjects: Foreign exchange rates -- South Africa , Strikes and lockouts -- South Africa -- Economic aspects , South Africa -- Foreign economic relations , South Africa -- Economic conditions -- 1991- , Rand, South African , Dollar, American
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:1124 , http://hdl.handle.net/10962/d1020018
- Description: This study analyses whether the advent of strike action has an effect on the value and volatility of the South African Rand compared with the US Dollar. The literature suggests that strike action can have a significant effect on the exchange rate in terms of either value or volatility, and consequences can result that cause inefficiencies in the economy; inhibiting employment and economic growth. Strike action has become common place in South Africa, with 2012 alone recording 99 strikes, 45 of which were “wildcat” or unprotected strikes. This study uses GARCH and Intervention Analyses to determine what the resulting effects of the strikes might be on the exchange rate. The analysis used ZAR/USD exchange rate data for the period January 2000 to October 2013, and covered 72 of the most significant strikes in terms of lost man-days. The results are mixed, suggesting that the effects of strikes do not always conform to expectations (increased volatility and a depreciation in the Rand), and that outside factors affecting the global economy may have a more significant effect on the exchange rate than strikes on their own.
- Full Text:
- Date Issued: 2015
- Authors: Gordon, Ross Patrick
- Date: 2015
- Subjects: Foreign exchange rates -- South Africa , Strikes and lockouts -- South Africa -- Economic aspects , South Africa -- Foreign economic relations , South Africa -- Economic conditions -- 1991- , Rand, South African , Dollar, American
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:1124 , http://hdl.handle.net/10962/d1020018
- Description: This study analyses whether the advent of strike action has an effect on the value and volatility of the South African Rand compared with the US Dollar. The literature suggests that strike action can have a significant effect on the exchange rate in terms of either value or volatility, and consequences can result that cause inefficiencies in the economy; inhibiting employment and economic growth. Strike action has become common place in South Africa, with 2012 alone recording 99 strikes, 45 of which were “wildcat” or unprotected strikes. This study uses GARCH and Intervention Analyses to determine what the resulting effects of the strikes might be on the exchange rate. The analysis used ZAR/USD exchange rate data for the period January 2000 to October 2013, and covered 72 of the most significant strikes in terms of lost man-days. The results are mixed, suggesting that the effects of strikes do not always conform to expectations (increased volatility and a depreciation in the Rand), and that outside factors affecting the global economy may have a more significant effect on the exchange rate than strikes on their own.
- Full Text:
- Date Issued: 2015
IsiXhosa storytelling (iintsomi) as an alternative medium for maternal health education in primary healthcare in the Eastern Cape
- Authors: Zakaza, Nompucuko
- Date: 2015
- Subjects: Communication in community health services -- South Africa -- Eastern Cape , Communication in reproductive health -- South Africa -- Eastern Cape , Storytelling in education , Applied folklore
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3648 , http://hdl.handle.net/10962/d1017188
- Description: The aim of this study is to explore the introduction of IsiXhosa (iintsomi) as an alternative method in the maternal health education in rural Primary Health Care in the Eastern Cape. An informal preliminary observation of a maternal health lesson by the researcher indicated a further need for maternal health educators to introduce storytelling into the health content themes. To re-inforce the maternal health educator lesson on the causes of teenage pregnancy, lifestyles for pregnant women, causes of miscarriage and termination of pregnancy, the Community Health Workers can undoubtedly use isiXhosa iintsomi in selected clinics and maternal waiting homes. As a readily available resource that cuts across all literacy barriers, iintsomi (isiXhosa) fosters a cross-cultural consultation which enables the healthcare worker to convey messages that make sense to the rural women. While the conventional methods of teaching have a tendency to create tension and lack of participation, use of folktale (iintsomi) have huge potential to bring lesson enjoyment; a meaningful interaction and story sharing by the maternal health educator, the pregnant women and greater community; access to important health messages; and strengthened utilisation of Primary Health Care. The study therefore suggests that there is a place for isiXhosa iintsomi: From the Fireplace into the Workplace.
- Full Text:
- Date Issued: 2015
- Authors: Zakaza, Nompucuko
- Date: 2015
- Subjects: Communication in community health services -- South Africa -- Eastern Cape , Communication in reproductive health -- South Africa -- Eastern Cape , Storytelling in education , Applied folklore
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3648 , http://hdl.handle.net/10962/d1017188
- Description: The aim of this study is to explore the introduction of IsiXhosa (iintsomi) as an alternative method in the maternal health education in rural Primary Health Care in the Eastern Cape. An informal preliminary observation of a maternal health lesson by the researcher indicated a further need for maternal health educators to introduce storytelling into the health content themes. To re-inforce the maternal health educator lesson on the causes of teenage pregnancy, lifestyles for pregnant women, causes of miscarriage and termination of pregnancy, the Community Health Workers can undoubtedly use isiXhosa iintsomi in selected clinics and maternal waiting homes. As a readily available resource that cuts across all literacy barriers, iintsomi (isiXhosa) fosters a cross-cultural consultation which enables the healthcare worker to convey messages that make sense to the rural women. While the conventional methods of teaching have a tendency to create tension and lack of participation, use of folktale (iintsomi) have huge potential to bring lesson enjoyment; a meaningful interaction and story sharing by the maternal health educator, the pregnant women and greater community; access to important health messages; and strengthened utilisation of Primary Health Care. The study therefore suggests that there is a place for isiXhosa iintsomi: From the Fireplace into the Workplace.
- Full Text:
- Date Issued: 2015
The tax consequences of a contingent liability disposed of as part of the sale of a business as a going concern
- Authors: Staude, Daylan
- Date: 2015
- Subjects: Sale of business enterprises -- Taxation -- South Africa , Sale of business enterprises -- Law and legislation -- South Africa , Tax deductions -- South Africa , Contingent liabilities (Accounting) -- Taxation -- South Africa
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:918 , http://hdl.handle.net/10962/d1017544
- Description: The sale of an entity as a going concern has a number of tax consequences for both the purchaser and the seller. The tax deductibility of a contingent liability upon its transfer from the seller to the purchaser, where the selling price has been reduced by the value of the contingent liabilities transferred, remains uncertain following the decision in Ackermans Ltd v Commissioner for the South African Revenue Service. An expense is either deductible under a specific section of the Income Tax Act, 58 of 1962, or under the general expense provisions in terms of sections 11(a) and 23(g). The Act does not contain a specific section relating to contingent liabilities and therefore a contingent liability will need to be considered for deduction under these sections. The Act further disallows an expense as a deduction under section 23(e), where a reserve is created (for example a leave pay provision). This study analyses the tax deductibility of a contingent liability, where the contingent liability has been transferred from the seller to the purchaser in a sale of an entity as a going concern and the purchase price has been reduced to compensate for the transfer of the contingent liability. The deductibility of the contingent liability was first assessed in terms of the provisions of the Act (sections 11(a), 23(g) and 23(e)) and associated case law. The decision in the Ackermans case and its preceding Income Tax Case 1839 was then analysed in order to establish the principles arising from the decisions. Finally the proposals in the Draft Taxation Laws Amendment Bill, 2011, and the subsequent Discussion Document issued by the South African Revenue Service were discussed. The analysis revealed the continuing confusion surrounding the status quo, thus demonstrating the importance of legislative intervention to provide guidelines for taxpayers.
- Full Text:
- Date Issued: 2015
- Authors: Staude, Daylan
- Date: 2015
- Subjects: Sale of business enterprises -- Taxation -- South Africa , Sale of business enterprises -- Law and legislation -- South Africa , Tax deductions -- South Africa , Contingent liabilities (Accounting) -- Taxation -- South Africa
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:918 , http://hdl.handle.net/10962/d1017544
- Description: The sale of an entity as a going concern has a number of tax consequences for both the purchaser and the seller. The tax deductibility of a contingent liability upon its transfer from the seller to the purchaser, where the selling price has been reduced by the value of the contingent liabilities transferred, remains uncertain following the decision in Ackermans Ltd v Commissioner for the South African Revenue Service. An expense is either deductible under a specific section of the Income Tax Act, 58 of 1962, or under the general expense provisions in terms of sections 11(a) and 23(g). The Act does not contain a specific section relating to contingent liabilities and therefore a contingent liability will need to be considered for deduction under these sections. The Act further disallows an expense as a deduction under section 23(e), where a reserve is created (for example a leave pay provision). This study analyses the tax deductibility of a contingent liability, where the contingent liability has been transferred from the seller to the purchaser in a sale of an entity as a going concern and the purchase price has been reduced to compensate for the transfer of the contingent liability. The deductibility of the contingent liability was first assessed in terms of the provisions of the Act (sections 11(a), 23(g) and 23(e)) and associated case law. The decision in the Ackermans case and its preceding Income Tax Case 1839 was then analysed in order to establish the principles arising from the decisions. Finally the proposals in the Draft Taxation Laws Amendment Bill, 2011, and the subsequent Discussion Document issued by the South African Revenue Service were discussed. The analysis revealed the continuing confusion surrounding the status quo, thus demonstrating the importance of legislative intervention to provide guidelines for taxpayers.
- Full Text:
- Date Issued: 2015
Bilingual teaching practices in South African higher education : making a case for terminology planning
- Authors: Mawonga, Sisonke
- Date: 2015
- Subjects: Language and education -- South Africa , Native language and education , Language policy -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3653 , http://hdl.handle.net/10962/d1017894
- Description: When the apartheid government was in power universities in South Africa were segregated according to a race and language. After apartheid, the democratic government came into power and its vision was abolition of segregation. There was also equal and equity of access to public institutions which were set aside for certain people to have access to. Access to universities was equalized and students with different racial, social, cultural and linguistic backgrounds were allowed access to universities which they used not to have access to before. The students‟ access to all universities led to diversity within these institutions. Even though this was the case, there were no changes in the system prevalent during apartheid. English, for example, continued to be the language of learning and teaching (LoLT) while the numbers of students who speak languages other than English (LOTE) as home languages was also increasing. The Constitution of South Africa (Section 6, Act 108 of 1996) acknowledges the previous marginalization of indigenous languages in the country and encourages the development and use of these languages as official languages. The right of access to educational institutions, and accessing education in one‟s language, if that language is one of the official languages, is also encouraged by the Constitution. There are other supporting legislative documents such as the Languages Bill (2011), the Higher Education Act (1997) and the national Language Policy for Higher Education (LPHE) (2002) that support multilingualism, the equal promotion of the official languages as well as use of multiple languages in higher education institutions (HEIs) to support learning. The above mentioned policies and legislations may exist to ensure equality and equity, and even though HEIs have become heterogonous, that does not guarantee that the students enrolled in these institutions have equal access to knowledge offered by the HEIs in SA. This research uses the theories of languages and conceptualization; language and learning as well as language planning to show that the students‟ first languages in learning can assist to facilitate cognition. Terminology development, as part of corpus planning which is the body of language planning is introduced in this study in the form of bilingual glossaries as an intervention especially for students‟ whose mother tongue is not English as language used for learning at university for different disciplines tend to be abstract. The data for this research was collected from the 2014 first year students registered in the Extended Studies Unit (ESU) in the Humanities Faculty at Rhodes University. Research methods such as questionnaires, participant observations, interviews as well as content analysis were used to collect the data. These methods were used to look at the students‟ use and perceptions of bilingual glossaries as additional resource materials which can assist them in learning. A Political Philosophy I module offered by the Political Science department was used for this research. This thesis presents a model which can be used for the development of bilingual glossaries in order to facilitate learning. The thesis recommends the use of corpus extraction tools such as WordSmith Tools (WST) that can be used to generate and extract terms and illustrates the use of this tool by extracting terms from an English Political Philosophy textbook. These terms are defined and these are then translated into isiXhosa to provide a sample of the bilingual glossary. This glossary has been designed to illustrate how the bi/multilingual glossaries with terms and definitions can be developed in order for use by students to facilitate learning them. The study also presents a terminology list which consists of Political Philosophy terms that have been generated during the corpus extraction process. It is recommended that further research looks into the development of bi/multilingual glossaries using the suggested model so that the students who are speakers of LOTE can also be able to understand abstract terms which are used at university
- Full Text:
- Date Issued: 2015
- Authors: Mawonga, Sisonke
- Date: 2015
- Subjects: Language and education -- South Africa , Native language and education , Language policy -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3653 , http://hdl.handle.net/10962/d1017894
- Description: When the apartheid government was in power universities in South Africa were segregated according to a race and language. After apartheid, the democratic government came into power and its vision was abolition of segregation. There was also equal and equity of access to public institutions which were set aside for certain people to have access to. Access to universities was equalized and students with different racial, social, cultural and linguistic backgrounds were allowed access to universities which they used not to have access to before. The students‟ access to all universities led to diversity within these institutions. Even though this was the case, there were no changes in the system prevalent during apartheid. English, for example, continued to be the language of learning and teaching (LoLT) while the numbers of students who speak languages other than English (LOTE) as home languages was also increasing. The Constitution of South Africa (Section 6, Act 108 of 1996) acknowledges the previous marginalization of indigenous languages in the country and encourages the development and use of these languages as official languages. The right of access to educational institutions, and accessing education in one‟s language, if that language is one of the official languages, is also encouraged by the Constitution. There are other supporting legislative documents such as the Languages Bill (2011), the Higher Education Act (1997) and the national Language Policy for Higher Education (LPHE) (2002) that support multilingualism, the equal promotion of the official languages as well as use of multiple languages in higher education institutions (HEIs) to support learning. The above mentioned policies and legislations may exist to ensure equality and equity, and even though HEIs have become heterogonous, that does not guarantee that the students enrolled in these institutions have equal access to knowledge offered by the HEIs in SA. This research uses the theories of languages and conceptualization; language and learning as well as language planning to show that the students‟ first languages in learning can assist to facilitate cognition. Terminology development, as part of corpus planning which is the body of language planning is introduced in this study in the form of bilingual glossaries as an intervention especially for students‟ whose mother tongue is not English as language used for learning at university for different disciplines tend to be abstract. The data for this research was collected from the 2014 first year students registered in the Extended Studies Unit (ESU) in the Humanities Faculty at Rhodes University. Research methods such as questionnaires, participant observations, interviews as well as content analysis were used to collect the data. These methods were used to look at the students‟ use and perceptions of bilingual glossaries as additional resource materials which can assist them in learning. A Political Philosophy I module offered by the Political Science department was used for this research. This thesis presents a model which can be used for the development of bilingual glossaries in order to facilitate learning. The thesis recommends the use of corpus extraction tools such as WordSmith Tools (WST) that can be used to generate and extract terms and illustrates the use of this tool by extracting terms from an English Political Philosophy textbook. These terms are defined and these are then translated into isiXhosa to provide a sample of the bilingual glossary. This glossary has been designed to illustrate how the bi/multilingual glossaries with terms and definitions can be developed in order for use by students to facilitate learning them. The study also presents a terminology list which consists of Political Philosophy terms that have been generated during the corpus extraction process. It is recommended that further research looks into the development of bi/multilingual glossaries using the suggested model so that the students who are speakers of LOTE can also be able to understand abstract terms which are used at university
- Full Text:
- Date Issued: 2015
An exploration of the structural, cultural and agential conditions that shape life skills teachers' responses and experiences in teaching sexuality and HIV and AIDS
- Authors: Hakaala, Beatha Ndinelao
- Date: 2015
- Subjects: Life skills -- Study and teaching (Secondary) -- Namibia , Sex instruction -- Study and teaching (Secondary) -- Namibia , HIV infections -- Study and teaching (Secondary) -- Namibia , AIDS (Disease) -- Study and teaching (Secondary) -- Namibia
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:2029 , http://hdl.handle.net/10962/d1017340
- Description: This paper reports findings on how Namibian secondary school Life Skills teachers are exercising their agency to teach or not to teach Sexuality and HIV and AIDS, a subject which is regarded as sensitive and has been surrounded by secrecy and has issues which are cloaked by silence and taboos. The aim of the study was to explore the structural and cultural factors that shape the responses and experiences of Life Skills teachers in teaching sexuality and HIV and AIDS. The study was conducted through observations and interviews with four full-time Life Skills teachers. Document analysis was carried out throughout the study in which lesson plans, portfolios, assessment forms, Life Skills syllabuses, schemes of works, national curriculum documents and subject policy on HIV and AIDS were analysed. The data were analysed by identifying categories, codes and themes using the analytic dualism framework, and the literature review was used to summarise the findings. The study revealed that all teachers operate in an environment that consists of the National structures such as high teacher: learner ratio in their classrooms that they have to teach Life Skills and do day to day counselling, a lack of teaching and learning support material that they should use to scaffold the learning of sexuality and HIV and AIDS, and little time allocated to Life Skills teaching. The same study also revealed that the teaching of Life Skills is hampered by the cultural structures which emerged from teachers’ discourses as evidenced from the data which shows that cultural properties have powers that condition teachers in teaching sexuality and HIV and AIDS. This included learners’ silence in sex-related discussion versus teachers’ position; discourses on the importance of full-time Life Skills teachers in school; comfort in teaching selected topics in Life Skills; Life Skills teachers’ perceptions on parents’ feelings on teaching sexuality and HIV and AIDS in schools, and perceptions on the Life Skills teachers’ position and teaching sexuality and sex education. While the findings revealed that teachers are conditioned by the structural and cultural conditions that acted as constraints to teaching sexuality and HIV and AIDS, the observations revealed agency on their part. The study finding depicts instances where teachers acted in agreement or in contravention of the structural and cultural pressures or conditions in their environments.
- Full Text:
- Date Issued: 2015
- Authors: Hakaala, Beatha Ndinelao
- Date: 2015
- Subjects: Life skills -- Study and teaching (Secondary) -- Namibia , Sex instruction -- Study and teaching (Secondary) -- Namibia , HIV infections -- Study and teaching (Secondary) -- Namibia , AIDS (Disease) -- Study and teaching (Secondary) -- Namibia
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:2029 , http://hdl.handle.net/10962/d1017340
- Description: This paper reports findings on how Namibian secondary school Life Skills teachers are exercising their agency to teach or not to teach Sexuality and HIV and AIDS, a subject which is regarded as sensitive and has been surrounded by secrecy and has issues which are cloaked by silence and taboos. The aim of the study was to explore the structural and cultural factors that shape the responses and experiences of Life Skills teachers in teaching sexuality and HIV and AIDS. The study was conducted through observations and interviews with four full-time Life Skills teachers. Document analysis was carried out throughout the study in which lesson plans, portfolios, assessment forms, Life Skills syllabuses, schemes of works, national curriculum documents and subject policy on HIV and AIDS were analysed. The data were analysed by identifying categories, codes and themes using the analytic dualism framework, and the literature review was used to summarise the findings. The study revealed that all teachers operate in an environment that consists of the National structures such as high teacher: learner ratio in their classrooms that they have to teach Life Skills and do day to day counselling, a lack of teaching and learning support material that they should use to scaffold the learning of sexuality and HIV and AIDS, and little time allocated to Life Skills teaching. The same study also revealed that the teaching of Life Skills is hampered by the cultural structures which emerged from teachers’ discourses as evidenced from the data which shows that cultural properties have powers that condition teachers in teaching sexuality and HIV and AIDS. This included learners’ silence in sex-related discussion versus teachers’ position; discourses on the importance of full-time Life Skills teachers in school; comfort in teaching selected topics in Life Skills; Life Skills teachers’ perceptions on parents’ feelings on teaching sexuality and HIV and AIDS in schools, and perceptions on the Life Skills teachers’ position and teaching sexuality and sex education. While the findings revealed that teachers are conditioned by the structural and cultural conditions that acted as constraints to teaching sexuality and HIV and AIDS, the observations revealed agency on their part. The study finding depicts instances where teachers acted in agreement or in contravention of the structural and cultural pressures or conditions in their environments.
- Full Text:
- Date Issued: 2015
Contextualising work-family conflict, social support and gender ideologies of professional/registered nurses in the Cacadu District, Eastern Cape
- Authors: Koeberg, Richenda
- Date: 2015
- Subjects: Nursing -- Social aspects -- South Africa -- Eastern Cape , Nurses -- Job stress -- South Africa -- Eastern Cape , Work and family
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3261 , http://hdl.handle.net/10962/d1017884
- Description: The focus of this study was to investigate work-family conflict, social support and gender ideologies of professional/registered nurses in the South African context, specifically within the Cacadu District (Eastern Cape). The study had four aims: (a) to investigate the construct validity of the measuring instrument, (b) to investigate the relationship between social support provided by family and family interference with work (FIW), (c) to ascertain the influence of shift work on perceived work-family conflict, and lastly, (d) to determine whether there is a difference between the number of children in households and nurses’ perceptions of work-family conflict. A quantitative research design was used in the study. The sample (N = 106) was taken from five district hospitals in the Cacadu District, Eastern Cape. The measuring instrument consisted of three scales, namely the Multi-dimensional Work-Family Conflict Scale (Carlson, Kacmar, & Williams, 2000), the Social Support Questionnaire (Sarason, Sarason, Shearin, & Pierce, 1987), and an adapted Gender Ideology Scale (Tsai, 2008). The results indicated that the construct validity of the Multi-dimensional Work-Family Conflict scale was satisfactory. However, analysis of the Social Support Questionnaire and Gender Ideology scales both suggested that these scales have not been validated for use with diverse samples outside the contexts in which they were developed. The results also indicated that there is a relationship between social support provided by families and behaviour-based family interference with work. Additionally, there appeared to be a difference between the shifts worked by nurses and their perceived work-family conflict, except for strain-based work interference with family. And lastly, the only significant difference between the number of children in the household and work-family conflict was reported for strain-based work interference with family. The implications of the results for future research suggest the importance of developing and validating work-family conflict, social support and gender ideology scales that are dependent on the context of the research. In so doing, the constructs of the scale are made meaningful. Additionally, the findings provide preliminary evidence of tailoring work-family initiatives that address the needs of the nursing profession and the context of healthcare institutions
- Full Text:
- Date Issued: 2015
- Authors: Koeberg, Richenda
- Date: 2015
- Subjects: Nursing -- Social aspects -- South Africa -- Eastern Cape , Nurses -- Job stress -- South Africa -- Eastern Cape , Work and family
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3261 , http://hdl.handle.net/10962/d1017884
- Description: The focus of this study was to investigate work-family conflict, social support and gender ideologies of professional/registered nurses in the South African context, specifically within the Cacadu District (Eastern Cape). The study had four aims: (a) to investigate the construct validity of the measuring instrument, (b) to investigate the relationship between social support provided by family and family interference with work (FIW), (c) to ascertain the influence of shift work on perceived work-family conflict, and lastly, (d) to determine whether there is a difference between the number of children in households and nurses’ perceptions of work-family conflict. A quantitative research design was used in the study. The sample (N = 106) was taken from five district hospitals in the Cacadu District, Eastern Cape. The measuring instrument consisted of three scales, namely the Multi-dimensional Work-Family Conflict Scale (Carlson, Kacmar, & Williams, 2000), the Social Support Questionnaire (Sarason, Sarason, Shearin, & Pierce, 1987), and an adapted Gender Ideology Scale (Tsai, 2008). The results indicated that the construct validity of the Multi-dimensional Work-Family Conflict scale was satisfactory. However, analysis of the Social Support Questionnaire and Gender Ideology scales both suggested that these scales have not been validated for use with diverse samples outside the contexts in which they were developed. The results also indicated that there is a relationship between social support provided by families and behaviour-based family interference with work. Additionally, there appeared to be a difference between the shifts worked by nurses and their perceived work-family conflict, except for strain-based work interference with family. And lastly, the only significant difference between the number of children in the household and work-family conflict was reported for strain-based work interference with family. The implications of the results for future research suggest the importance of developing and validating work-family conflict, social support and gender ideology scales that are dependent on the context of the research. In so doing, the constructs of the scale are made meaningful. Additionally, the findings provide preliminary evidence of tailoring work-family initiatives that address the needs of the nursing profession and the context of healthcare institutions
- Full Text:
- Date Issued: 2015
Investigating integrated catchment management using a simple water quantity and quality model : a case study of the Crocodile River Catchment, South Africa
- Retief, Daniel Christoffel Hugo
- Authors: Retief, Daniel Christoffel Hugo
- Date: 2015
- Subjects: Watersheds -- South Africa -- Krokodilrivier (Mpumalanga) , Integrated water development -- South Africa -- Krokodilrivier (Mpumalanga) , Water quality management -- South Africa -- Krokodilrivier (Mpumalanga) , Water-supply -- South Africa -- Krokodilrivier (Mpumalanga) , Water quality -- Measurement
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:6050 , http://hdl.handle.net/10962/d1017875
- Description: Internationally, water resources are facing increasing pressure due to over-exploitation and pollution. Integrated Water Resource Management (IWRM) has been accepted internationally as a paradigm for integrative and sustainable management of water resources. However, in practice, the implementation and success of IWRM policies has been hampered by the lack of availability of integrative decision support tools, especially within the context of limited resources and observed data. This is true for the Crocodile River Catchment (CRC), located within the Mpumalanga Province of South Africa. The catchment has been experiencing a decline in water quality as a result of the point source input of a cocktail of pollutants, which are discharged from industrial and municipal wastewater treatment plants, as well as diffuse source runoff and return flows from the extensive areas of irrigated agriculture and mining sites. The decline in water quality has profound implications for a range of stakeholders across the catchment including increased treatment costs and reduced crop yields. The combination of deteriorating water quality and the lack of understanding of the relationships between water quantity and quality for determining compliance/non-compliance in the CRC have resulted in collaboration between stakeholders, willing to work in a participatory and transparent manner to create an Integrated Water Quality Management Plan (IWQMP). This project aimed to model water quality, (combined water quality and quantity), to facilitate the IWQMP aiding in the understanding of the relationship between water quantity and quality in the CRC. A relatively simple water quality model (WQSAM) was used that receives inputs from established water quantity systems models, and was designed to be a water quality decision support tool for South African catchments. The model was applied to the CRC, achieving acceptable simulations of total dissolved solids (used as a surrogate for salinity) and nutrients (including orthophosphates, nitrates +nitrites and ammonium) for historical conditions. Validation results revealed that there is little consistency within the catchment, attributed to the non-stationary nature of water quality at many of the sites in the CRC. The analyses of the results using a number of representations including, seasonal load distributions, load duration curves and load flow plots, confirmed that the WQSAM model was able to capture the variability of relationships between water quantity and quality, provided that simulated hydrology was sufficiently accurate. The outputs produced by WQSAM was seen as useful for the CRC, with the Inkomati-Usuthu Catchment Management Agency (IUCMA) planning to operationalise the model in 2015. The ability of WQSAM to simulate water quality in data scarce catchments, with constituents that are appropriate for the needs of water resource management within South Africa, is highly beneficial.
- Full Text:
- Date Issued: 2015
- Authors: Retief, Daniel Christoffel Hugo
- Date: 2015
- Subjects: Watersheds -- South Africa -- Krokodilrivier (Mpumalanga) , Integrated water development -- South Africa -- Krokodilrivier (Mpumalanga) , Water quality management -- South Africa -- Krokodilrivier (Mpumalanga) , Water-supply -- South Africa -- Krokodilrivier (Mpumalanga) , Water quality -- Measurement
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:6050 , http://hdl.handle.net/10962/d1017875
- Description: Internationally, water resources are facing increasing pressure due to over-exploitation and pollution. Integrated Water Resource Management (IWRM) has been accepted internationally as a paradigm for integrative and sustainable management of water resources. However, in practice, the implementation and success of IWRM policies has been hampered by the lack of availability of integrative decision support tools, especially within the context of limited resources and observed data. This is true for the Crocodile River Catchment (CRC), located within the Mpumalanga Province of South Africa. The catchment has been experiencing a decline in water quality as a result of the point source input of a cocktail of pollutants, which are discharged from industrial and municipal wastewater treatment plants, as well as diffuse source runoff and return flows from the extensive areas of irrigated agriculture and mining sites. The decline in water quality has profound implications for a range of stakeholders across the catchment including increased treatment costs and reduced crop yields. The combination of deteriorating water quality and the lack of understanding of the relationships between water quantity and quality for determining compliance/non-compliance in the CRC have resulted in collaboration between stakeholders, willing to work in a participatory and transparent manner to create an Integrated Water Quality Management Plan (IWQMP). This project aimed to model water quality, (combined water quality and quantity), to facilitate the IWQMP aiding in the understanding of the relationship between water quantity and quality in the CRC. A relatively simple water quality model (WQSAM) was used that receives inputs from established water quantity systems models, and was designed to be a water quality decision support tool for South African catchments. The model was applied to the CRC, achieving acceptable simulations of total dissolved solids (used as a surrogate for salinity) and nutrients (including orthophosphates, nitrates +nitrites and ammonium) for historical conditions. Validation results revealed that there is little consistency within the catchment, attributed to the non-stationary nature of water quality at many of the sites in the CRC. The analyses of the results using a number of representations including, seasonal load distributions, load duration curves and load flow plots, confirmed that the WQSAM model was able to capture the variability of relationships between water quantity and quality, provided that simulated hydrology was sufficiently accurate. The outputs produced by WQSAM was seen as useful for the CRC, with the Inkomati-Usuthu Catchment Management Agency (IUCMA) planning to operationalise the model in 2015. The ability of WQSAM to simulate water quality in data scarce catchments, with constituents that are appropriate for the needs of water resource management within South Africa, is highly beneficial.
- Full Text:
- Date Issued: 2015
The quantification of fucoxanthin from selected South African marine brown algae (Phaeophyta) using HPLC-UV/Vis
- Authors: Mubaiwa, Byron Tawanda
- Date: 2015
- Subjects: Marine algae , Brown algae , High performance liquid chromatography , Functional foods , Xanthophylls , Carotenoids , Extraction (Chemistry)
- Language: English
- Type: Thesis , Masters , MPharm
- Identifier: vital:3868 , http://hdl.handle.net/10962/d1017879
- Description: Marine brown algae (seaweeds) are a rich source of fucoxanthin, a xanthophyll carotenoid that is naturally, an accessory pigment in the process of photosynthesis of sea vegetation such as Sargassum incisifolium. Fucoxanthin has been exploited by nutraceutical companies for its anti-obesity effects that has resulted in an increase of seaweed slimming preparations such as FucoThin™. The field is getting widespread consumer attention as interest in fucoxanthin has also transcended to its widespread biological potential which include cytotoxicity, anti-diabetic, anti-oxidant, anti-inflammatory and anti-plasmodium effects. We therefore wanted to identify a reliable source(s) of fucoxanthin from diverse samples of South African marine brown algae in order to explore our medicinal chemistry interests around the cytotoxicity and anti-malarial potential of fucoxanthin. A known source, Sargassum incisifolium, was used to isolate (maceration in CH₂Cl₂/MeOH at 35 °C followed by a hexane/EtOAc step gradient silica column of the crude extract and reversed phase semi-prep HPLC) and characterize (1D and 2D NMR) fucoxanthin (reference standard) in order to develop an analytical method for its determination in selected diverse brown algae commonly found in South Africa. The HPLC [Column: Phenomenex® Synergi™ (250 x 3.0 mm i.d); Mobile phase: ACN/H2O (95:5)] method developed for this analysis was validated according the guidelines set by the International Conference on Harmonization (ICH). Fifteen species were then assessed for fucoxanthin content (μg/g of dried weight) using the developed method. Stability studies on fucoxanthin were also carried out to assess photo- and pH degradation of fucoxanthin. Zonaria subarticulata (KOS130226-18) from Kenton-On-Sea beach and Sargassum incisifolium (PA130427-1) from Port Alfred beach were found to be the highest producers of fucoxanthin with 0.50 mg/g and 0.45 mg/g dried weight respectively. Fucoxanthin was found to be both photo-labile and sensitive to both acidic and basic pH environments. However, the pigment was more photostable in pure as opposed to extract form and also showed to be more stable at pH 10.0. Our findings show that Z. subarticulata and S. incisifolium could be reliable sources of fucoxanthin and can be considered as the algae to use in optimized extraction procedures in further studies. Also, when working with fucoxanthin, it is important to protect it from light. Any consideration of taking fucoxanthin preparation orally (as a nutraceutical) should consider protecting the active from the harsh conditions of the gastrointestinal tract. Any upscale production of fucoxanthin from seaweed should consider variations such as geographical, seasonal, lifecycle stage, etc. of identified algae as these may be important factors in obtaining effective concentrations of fucoxanthin.
- Full Text:
- Date Issued: 2015
- Authors: Mubaiwa, Byron Tawanda
- Date: 2015
- Subjects: Marine algae , Brown algae , High performance liquid chromatography , Functional foods , Xanthophylls , Carotenoids , Extraction (Chemistry)
- Language: English
- Type: Thesis , Masters , MPharm
- Identifier: vital:3868 , http://hdl.handle.net/10962/d1017879
- Description: Marine brown algae (seaweeds) are a rich source of fucoxanthin, a xanthophyll carotenoid that is naturally, an accessory pigment in the process of photosynthesis of sea vegetation such as Sargassum incisifolium. Fucoxanthin has been exploited by nutraceutical companies for its anti-obesity effects that has resulted in an increase of seaweed slimming preparations such as FucoThin™. The field is getting widespread consumer attention as interest in fucoxanthin has also transcended to its widespread biological potential which include cytotoxicity, anti-diabetic, anti-oxidant, anti-inflammatory and anti-plasmodium effects. We therefore wanted to identify a reliable source(s) of fucoxanthin from diverse samples of South African marine brown algae in order to explore our medicinal chemistry interests around the cytotoxicity and anti-malarial potential of fucoxanthin. A known source, Sargassum incisifolium, was used to isolate (maceration in CH₂Cl₂/MeOH at 35 °C followed by a hexane/EtOAc step gradient silica column of the crude extract and reversed phase semi-prep HPLC) and characterize (1D and 2D NMR) fucoxanthin (reference standard) in order to develop an analytical method for its determination in selected diverse brown algae commonly found in South Africa. The HPLC [Column: Phenomenex® Synergi™ (250 x 3.0 mm i.d); Mobile phase: ACN/H2O (95:5)] method developed for this analysis was validated according the guidelines set by the International Conference on Harmonization (ICH). Fifteen species were then assessed for fucoxanthin content (μg/g of dried weight) using the developed method. Stability studies on fucoxanthin were also carried out to assess photo- and pH degradation of fucoxanthin. Zonaria subarticulata (KOS130226-18) from Kenton-On-Sea beach and Sargassum incisifolium (PA130427-1) from Port Alfred beach were found to be the highest producers of fucoxanthin with 0.50 mg/g and 0.45 mg/g dried weight respectively. Fucoxanthin was found to be both photo-labile and sensitive to both acidic and basic pH environments. However, the pigment was more photostable in pure as opposed to extract form and also showed to be more stable at pH 10.0. Our findings show that Z. subarticulata and S. incisifolium could be reliable sources of fucoxanthin and can be considered as the algae to use in optimized extraction procedures in further studies. Also, when working with fucoxanthin, it is important to protect it from light. Any consideration of taking fucoxanthin preparation orally (as a nutraceutical) should consider protecting the active from the harsh conditions of the gastrointestinal tract. Any upscale production of fucoxanthin from seaweed should consider variations such as geographical, seasonal, lifecycle stage, etc. of identified algae as these may be important factors in obtaining effective concentrations of fucoxanthin.
- Full Text:
- Date Issued: 2015
The cheetahs of the Northern Tuli Game Reserve, Botswana: population estimates, monitoring techniques and human-predator conflict
- Authors: Brassine, Eleanor I
- Date: 2015
- Subjects: Cheetah -- Botswana , Northern Tuli Game Reserve , Animal populations -- Botswana
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5922 , http://hdl.handle.net/10962/d1017800
- Description: Remaining viable cheetah (Acinonyx jubatus) populations in Africa are threatened by direct persecution through conflict with farmers and habitat degradation and fragmentation. Botswana is considered a stronghold for free roaming cheetahs in Africa, yet the country has had relatively limited research on its cheetahs, and information from the east of the country is lacking. Data on the current status of populations is thus required to make informed management decisions. My study provides estimates of population density, abundance, distribution and status for the demographically open cheetah population of the Northern Tuli Game Reserve (NOTUGRE) in Botswana. The effectiveness of two population monitoring methods, namely camera trapping and a photographic survey, were also investigated. Moreover, I report on the level of conflict between livestock farmers and predators on rural communal farmlands within and adjacent to NOTUGRE. Data were collected between May 2012 and November 2013. Results indicate a low population density of 0.61 ± 0.18 adult cheetahs per 100 km² and a minimum population size of 10 individuals (nine adults and one cub). Camera traps placed at cheetah scent-marking posts increased detection rates and provided ideal set up locations. This approach, together with Spatial Explicit Capture- Recapture (SECR) models, is recommended for future studies. The long-term studies that are required to better understand the status of cheetahs in Botswana do not exist. Thus, photographic surveys may provide an alternative method for providing baseline data on population numbers, distribution and demography. The third aspect of my study gathered information on levels of livestock loss and human tolerance of predators through the use of interviews (n = 80). Conflict with subsistence farmers is a concern as livestock depredation is relatively high (9.1% of total livestock owned) and farmers had an overall negative attitude towards conservation of large predators. My results suggest that human-predator conflict in this area is more complex than the direct financial loss from depredation. Hence, reducing depredation rates alone is unlikely to change farmer tolerance of wildlife on farmlands. Improved, responsible farm management, including self-responsibility for livestock rearing, and positive appreciation for wildlife are necessary. The NOTUGRE cheetah population requires further research to understand possible threats to the population. Furthermore, a better understanding of the connectivity between cheetahs of NOTUGRE, South Africa and Zimbabwe is required. The number of cheetahs within NOTUGRE is too small to sustain a viable population, hence conserving cheetahs outside of the protected area should be a priority for the conservation of the population. This can only be achieved through assistance and involvement from national authorities, local people and conservation organisations.
- Full Text:
- Date Issued: 2015
- Authors: Brassine, Eleanor I
- Date: 2015
- Subjects: Cheetah -- Botswana , Northern Tuli Game Reserve , Animal populations -- Botswana
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5922 , http://hdl.handle.net/10962/d1017800
- Description: Remaining viable cheetah (Acinonyx jubatus) populations in Africa are threatened by direct persecution through conflict with farmers and habitat degradation and fragmentation. Botswana is considered a stronghold for free roaming cheetahs in Africa, yet the country has had relatively limited research on its cheetahs, and information from the east of the country is lacking. Data on the current status of populations is thus required to make informed management decisions. My study provides estimates of population density, abundance, distribution and status for the demographically open cheetah population of the Northern Tuli Game Reserve (NOTUGRE) in Botswana. The effectiveness of two population monitoring methods, namely camera trapping and a photographic survey, were also investigated. Moreover, I report on the level of conflict between livestock farmers and predators on rural communal farmlands within and adjacent to NOTUGRE. Data were collected between May 2012 and November 2013. Results indicate a low population density of 0.61 ± 0.18 adult cheetahs per 100 km² and a minimum population size of 10 individuals (nine adults and one cub). Camera traps placed at cheetah scent-marking posts increased detection rates and provided ideal set up locations. This approach, together with Spatial Explicit Capture- Recapture (SECR) models, is recommended for future studies. The long-term studies that are required to better understand the status of cheetahs in Botswana do not exist. Thus, photographic surveys may provide an alternative method for providing baseline data on population numbers, distribution and demography. The third aspect of my study gathered information on levels of livestock loss and human tolerance of predators through the use of interviews (n = 80). Conflict with subsistence farmers is a concern as livestock depredation is relatively high (9.1% of total livestock owned) and farmers had an overall negative attitude towards conservation of large predators. My results suggest that human-predator conflict in this area is more complex than the direct financial loss from depredation. Hence, reducing depredation rates alone is unlikely to change farmer tolerance of wildlife on farmlands. Improved, responsible farm management, including self-responsibility for livestock rearing, and positive appreciation for wildlife are necessary. The NOTUGRE cheetah population requires further research to understand possible threats to the population. Furthermore, a better understanding of the connectivity between cheetahs of NOTUGRE, South Africa and Zimbabwe is required. The number of cheetahs within NOTUGRE is too small to sustain a viable population, hence conserving cheetahs outside of the protected area should be a priority for the conservation of the population. This can only be achieved through assistance and involvement from national authorities, local people and conservation organisations.
- Full Text:
- Date Issued: 2015
An examination of the Mobisam project and Grocott's Mail : towards mobile social accountability monitoring in Grahamstown
- Authors: Reinecke, Romi Kami
- Date: 2015
- Subjects: Grocott's Mail (Grahamstown, South Africa) , Electronic discussion groups -- South Africa -- Grahamstown , Citizen journalism -- South Africa -- Grahamstown , Municipal services -- South Africa -- Grahamstown , Government accountability -- South Africa -- Grahamstown , Social action -- South Africa -- Grahamstown , Municipal services -- Citizen participation , Municipal government -- South Africa -- Grahamstown
- Language: English
- Type: Thesis , Masters , MSocSc
- Identifier: vital:3541 , http://hdl.handle.net/10962/d1017782
- Description: This thesis critically examines the nature and purpose of the MobiSAM partnership, in relation to its value as a model resonating with normative theories on the role of the media in South African democratic society. The MobiSAM project introduces a mobile polling application, designed for citizens to provide real-time, user-generated data on crucial municipal service delivery such as clean water in Grahamstown, Eastern Cape, South Africa. The project has partnered with the local community newspaper, Grocott's Mail, to broadcast this data, with the aim to facilitate citizen participation in public problem solving and support local government accountability in service delivery. Despite pervasive poverty in areas such as the Eastern Cape, mobile penetration in South Africa is near universal. The MobiSAM partnership is an ongoing effort to forge new links between social accountability monitors, new media, traditional media, citizens and local government around public issues in Grahamstown, in line with the development objectives of the post-apartheid South African state. The overall theoretical framework for this thesis is taken from Christians, Glasser, McQuail, Nordenstreng and White's Normative Theories of the Media, which provides an analysis of four roles of the media in a democratic society, that is: the monitorial, the facilitative, the radical and the collaborative roles. Within each of these roles, the stated journalistic approach is explored, that is investigative journalism, public journalism, radical journalism and development journalism. Public journalism is focused on as having the most resonance with the goals of the MobiSAM partnership. The chosen research design is a critical realist case study with the selected methods of thematic document analysis and, primarily, in-depth interviews with key project participants. The research goals were to analyse this primary data against the normative theory on the role of the media in a democratic society, and the 'real world' constraints posed by the project’s specific political and socioeconomic context. The findings conclude by offering certain recommendations and areas for further research, such as the central importance of a dedicated municipal reporter for covering complex public issues. This critical realist case study, drawing on qualitative interviews with both the accountability monitors and the media practitioners, interrogates the philosophical understandings on the role of the media in this new project, towards an empirical model for advancing substantive socio-economic change through media in South Africa.
- Full Text:
- Date Issued: 2015
- Authors: Reinecke, Romi Kami
- Date: 2015
- Subjects: Grocott's Mail (Grahamstown, South Africa) , Electronic discussion groups -- South Africa -- Grahamstown , Citizen journalism -- South Africa -- Grahamstown , Municipal services -- South Africa -- Grahamstown , Government accountability -- South Africa -- Grahamstown , Social action -- South Africa -- Grahamstown , Municipal services -- Citizen participation , Municipal government -- South Africa -- Grahamstown
- Language: English
- Type: Thesis , Masters , MSocSc
- Identifier: vital:3541 , http://hdl.handle.net/10962/d1017782
- Description: This thesis critically examines the nature and purpose of the MobiSAM partnership, in relation to its value as a model resonating with normative theories on the role of the media in South African democratic society. The MobiSAM project introduces a mobile polling application, designed for citizens to provide real-time, user-generated data on crucial municipal service delivery such as clean water in Grahamstown, Eastern Cape, South Africa. The project has partnered with the local community newspaper, Grocott's Mail, to broadcast this data, with the aim to facilitate citizen participation in public problem solving and support local government accountability in service delivery. Despite pervasive poverty in areas such as the Eastern Cape, mobile penetration in South Africa is near universal. The MobiSAM partnership is an ongoing effort to forge new links between social accountability monitors, new media, traditional media, citizens and local government around public issues in Grahamstown, in line with the development objectives of the post-apartheid South African state. The overall theoretical framework for this thesis is taken from Christians, Glasser, McQuail, Nordenstreng and White's Normative Theories of the Media, which provides an analysis of four roles of the media in a democratic society, that is: the monitorial, the facilitative, the radical and the collaborative roles. Within each of these roles, the stated journalistic approach is explored, that is investigative journalism, public journalism, radical journalism and development journalism. Public journalism is focused on as having the most resonance with the goals of the MobiSAM partnership. The chosen research design is a critical realist case study with the selected methods of thematic document analysis and, primarily, in-depth interviews with key project participants. The research goals were to analyse this primary data against the normative theory on the role of the media in a democratic society, and the 'real world' constraints posed by the project’s specific political and socioeconomic context. The findings conclude by offering certain recommendations and areas for further research, such as the central importance of a dedicated municipal reporter for covering complex public issues. This critical realist case study, drawing on qualitative interviews with both the accountability monitors and the media practitioners, interrogates the philosophical understandings on the role of the media in this new project, towards an empirical model for advancing substantive socio-economic change through media in South Africa.
- Full Text:
- Date Issued: 2015
Teacher perceptions regarding training and their subsequent ability to integrate ICTs into marginalised rural schools : The ICT4RED Case Study
- Authors: Nkula, Kanya Zonke
- Date: 2015
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:20978 , http://hdl.handle.net/10962/5798
- Description: It is well documented that Information and Communication Technologies (ICTs) play an important role in education and that their use is associated with improving student learning and adding value to the curriculum. However, despite the opportunities that ICTs offer, numerous schools in South Africa face various barriers that result in the limited use of ICTs in the classroom. Literature has highlighted the lack of integration as one of these barriers. Teachers focus on teaching about ICTs where the focus is on developing computer literacy or technical knowledge rather than allowing students to learn through or with ICTs. This thesis aims to explore the concept of ICT integration in rural schools, where ICTs form an integral part of teaching and learning practices. It presents a number of theoretical considerations for ICT integration with a particular focus on teacher pedagogical beliefs and barriers to integration. Using interpretivism as the underlying philosophy and thematic analysis as the analysis tool, the author reflects on ICT integration in the ICT4RED project at Arthur Mfebe Senior Secondary School in the Eastern Cape Province. Furthermore, this thesis offers an in-depth understanding of integration barriers in rural marginalised schools. These barriers are presented in Thematic Maps as well as a framework which incorporates both theoretical considerations and themes that emerged from fieldwork.
- Full Text:
- Date Issued: 2015
- Authors: Nkula, Kanya Zonke
- Date: 2015
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:20978 , http://hdl.handle.net/10962/5798
- Description: It is well documented that Information and Communication Technologies (ICTs) play an important role in education and that their use is associated with improving student learning and adding value to the curriculum. However, despite the opportunities that ICTs offer, numerous schools in South Africa face various barriers that result in the limited use of ICTs in the classroom. Literature has highlighted the lack of integration as one of these barriers. Teachers focus on teaching about ICTs where the focus is on developing computer literacy or technical knowledge rather than allowing students to learn through or with ICTs. This thesis aims to explore the concept of ICT integration in rural schools, where ICTs form an integral part of teaching and learning practices. It presents a number of theoretical considerations for ICT integration with a particular focus on teacher pedagogical beliefs and barriers to integration. Using interpretivism as the underlying philosophy and thematic analysis as the analysis tool, the author reflects on ICT integration in the ICT4RED project at Arthur Mfebe Senior Secondary School in the Eastern Cape Province. Furthermore, this thesis offers an in-depth understanding of integration barriers in rural marginalised schools. These barriers are presented in Thematic Maps as well as a framework which incorporates both theoretical considerations and themes that emerged from fieldwork.
- Full Text:
- Date Issued: 2015
Using the larval parasitoid, Agathis bishopi (Nixon) (Hymenoptera: Braconidae), for early detection of false codling moth, Thaumatotibia leucotreta (Meyrick) (Lepidoptera: Tortricidae) infested fruit
- Authors: Zimba, Kennedy Josaya
- Date: 2015
- Subjects: Cryptophlebia leucotreta , Citrus -- Diseases and pests -- South Africa , Pests -- Biological control -- South Africa , Cryptophlebia leucotreta -- Detection , Parasitoids -- Hosts , Braconidae
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5919 , http://hdl.handle.net/10962/d1017186
- Description: Thaumatotibia leucotreta (Meyrick) (Lepidoptera: Tortricidae) is one of the major citrus pests of economic importance for South Africa’s citrus industry. It is endemic to Africa, and therefore a phytosanitary pest with zero tolerance by most export markets. The cryptic nature of T. leucotreta makes visual inspection an inefficient method for detecting neonate larvae in fruit in the packhouse. Therefore, a more accurate method for sorting infested fruit at the packhouse, particularly for newly infested fruit could ensure market access. A recent study showed that fruit infested by T. leucotreta emit a chemical profile different from that of a healthy fruit. Several studies provide evidence that parasitoids locate their hosts feeding on fruit by exploiting the novel chemical profiles produced due to host herbivory. The aim of this study was to evaluate the potential of using the naturally occurring behaviour of a larval parasitoid Agathis bishopi (Nixon) (Hymenoptera: Braconidae) for detection of T. leucotreta infested fruit, by determining which compound in infested fruit is attractive to parasitoids. Ytube olfactometer and flight-tunnel bioassays with healthy and T. leucotreta infested fruit showed a significantly stronger response of A. bishopi female parasitoids to infested fruit. Among the volatile compounds associated with T. leucotreta infested fruit, D-limonene elicited the strongest attraction to A. bishopi female parasitoids. Attraction of mated A. bishopi female parasitoids to T. leucotreta infested fruit and D-limonene significantly increased after oviposition experience. Behavioural responses of A. bishopi female parasitoids that were associated with T. leucotreta infested fruit were investigated to determine which behaviours are distinct and interpretable. Probing and oviposition behaviours were the most noticeable and were only elicited on infested fruit when parasitoids contacted T. leucotreta frass, indicating that chemical compounds in frass are short-range cues used for final host location. Since production of D-limonene by fruit is elevated due to herbivory by different pests including mechanical injury on fruit, response of A. bishopi female parasitoids to compounds in frass offers a more specific and potentially useful mechanism for development of a detection system for T. leucotreta infested fruit. Chemical analysis of T. leucotreta frass and conditioning A. bishopi parasitoids to respond behaviourally to compounds in frass is proposed.
- Full Text:
- Date Issued: 2015
- Authors: Zimba, Kennedy Josaya
- Date: 2015
- Subjects: Cryptophlebia leucotreta , Citrus -- Diseases and pests -- South Africa , Pests -- Biological control -- South Africa , Cryptophlebia leucotreta -- Detection , Parasitoids -- Hosts , Braconidae
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5919 , http://hdl.handle.net/10962/d1017186
- Description: Thaumatotibia leucotreta (Meyrick) (Lepidoptera: Tortricidae) is one of the major citrus pests of economic importance for South Africa’s citrus industry. It is endemic to Africa, and therefore a phytosanitary pest with zero tolerance by most export markets. The cryptic nature of T. leucotreta makes visual inspection an inefficient method for detecting neonate larvae in fruit in the packhouse. Therefore, a more accurate method for sorting infested fruit at the packhouse, particularly for newly infested fruit could ensure market access. A recent study showed that fruit infested by T. leucotreta emit a chemical profile different from that of a healthy fruit. Several studies provide evidence that parasitoids locate their hosts feeding on fruit by exploiting the novel chemical profiles produced due to host herbivory. The aim of this study was to evaluate the potential of using the naturally occurring behaviour of a larval parasitoid Agathis bishopi (Nixon) (Hymenoptera: Braconidae) for detection of T. leucotreta infested fruit, by determining which compound in infested fruit is attractive to parasitoids. Ytube olfactometer and flight-tunnel bioassays with healthy and T. leucotreta infested fruit showed a significantly stronger response of A. bishopi female parasitoids to infested fruit. Among the volatile compounds associated with T. leucotreta infested fruit, D-limonene elicited the strongest attraction to A. bishopi female parasitoids. Attraction of mated A. bishopi female parasitoids to T. leucotreta infested fruit and D-limonene significantly increased after oviposition experience. Behavioural responses of A. bishopi female parasitoids that were associated with T. leucotreta infested fruit were investigated to determine which behaviours are distinct and interpretable. Probing and oviposition behaviours were the most noticeable and were only elicited on infested fruit when parasitoids contacted T. leucotreta frass, indicating that chemical compounds in frass are short-range cues used for final host location. Since production of D-limonene by fruit is elevated due to herbivory by different pests including mechanical injury on fruit, response of A. bishopi female parasitoids to compounds in frass offers a more specific and potentially useful mechanism for development of a detection system for T. leucotreta infested fruit. Chemical analysis of T. leucotreta frass and conditioning A. bishopi parasitoids to respond behaviourally to compounds in frass is proposed.
- Full Text:
- Date Issued: 2015
Entrepreneurial intention among Rhodes University undergraduate students
- Authors: Bell, Jonathan Andrew
- Date: 2015
- Subjects: Rhodes University -- Undergraduates , Entrepreneurship -- South Africa -- Grahamstown , Social cognitive theory , Intention , Attitude (Psychology) , Influence (Psychology) , South Africa -- Economic conditions -- 1991-
- Language: English
- Type: Thesis , Masters , MSocSc
- Identifier: vital:3267 , http://hdl.handle.net/10962/d1020011
- Description: The entrepreneurial intentions of university students are important factors to consider when developing entrepreneurship offerings at tertiary level institutions. This research study reports on pertinent findings from a study which set out to determine Rhodes university undergraduate students‟ entrepreneurial intentions and their pull and push factors that have brought them to the decision to become entrepreneurs. A survey, using a 43 question structured web-based instrument was used to capture the responses from undergraduate students across different departments at Rhodes University, Grahamstown. Key findings suggest that few undergraduate students intend to enter into an entrepreneurship career immediately after completion of their studies, whereas many of the respondents were more interested in doing so five years after graduation. The vast majority of students were satisfied without having formal entrepreneurial education and factors such as previous employment in entrepreneurial activities, and family influence had a statistical significant relationship with entrepreneurial intention.
- Full Text:
- Date Issued: 2015
- Authors: Bell, Jonathan Andrew
- Date: 2015
- Subjects: Rhodes University -- Undergraduates , Entrepreneurship -- South Africa -- Grahamstown , Social cognitive theory , Intention , Attitude (Psychology) , Influence (Psychology) , South Africa -- Economic conditions -- 1991-
- Language: English
- Type: Thesis , Masters , MSocSc
- Identifier: vital:3267 , http://hdl.handle.net/10962/d1020011
- Description: The entrepreneurial intentions of university students are important factors to consider when developing entrepreneurship offerings at tertiary level institutions. This research study reports on pertinent findings from a study which set out to determine Rhodes university undergraduate students‟ entrepreneurial intentions and their pull and push factors that have brought them to the decision to become entrepreneurs. A survey, using a 43 question structured web-based instrument was used to capture the responses from undergraduate students across different departments at Rhodes University, Grahamstown. Key findings suggest that few undergraduate students intend to enter into an entrepreneurship career immediately after completion of their studies, whereas many of the respondents were more interested in doing so five years after graduation. The vast majority of students were satisfied without having formal entrepreneurial education and factors such as previous employment in entrepreneurial activities, and family influence had a statistical significant relationship with entrepreneurial intention.
- Full Text:
- Date Issued: 2015
A flight of fancy in the Chorister Robin-Chat (Cossypha dichroa) : an isotopic standpoint
- Wolmarans, Milena Helena Louise
- Authors: Wolmarans, Milena Helena Louise
- Date: 2015
- Subjects: Muscicapidae -- South Africa , Muscicapidae -- Food , Muscicapidae -- Habitat , Muscicapidae -- Habitat -- Conservation , Forest birds -- South Africa , Isotopes , Stable isotope tracers
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5920 , http://hdl.handle.net/10962/d1017207
- Description: Forested areas have been cited for their highly diverse floral and faunal assemblages, which are currently under threat from anthropogenic activities that restrict their range and deplete the resources produced within these naturally fragmented patches. Historically, up to 67 percent of avifaunal species associated with well-treed areas have undergone localised extinctions, consequentially affecting biodiversity as a measure of species richness and ecosystem functionality. To date, more than 900 of the bird species affiliated with forests are under threat and despite the theory surrounding functional redundancy, the mass extinction that is currently underway poses considerable limitations on the ecological integrity of these biomes. In South Africa, indigenous forest (one of the rarest biomes), occurs predominantly in small isolated patches along the eastern escarpment. With mountainous terrain emphasised as ‘prominent hotspots of extinction’, the limited dispersal and habitat sensitivity of montane forest fauna renders these species more prone to localised extinctions. BirdLife International, the IUCN and SABAP2 all indicate reductions in the range and abundance of the Chorister Robin-Chat (Cossypha dichroa) - an endemic forest specialist that is reported to move seasonally between high-altitude forest patches where they breed in summer, and lowland coastal forests where they overwinter. Beyond diet, body morphology and vocalisations, much of the information available on the altitudinal movements of C. dichroa is based on secondary sources and the assumptions therein. This study aimed to investigate the potential utilisation of δ13C and δ15N stable isotopes in determining the dietary niche width and altitudinal movements of C. dichroa. Feathers obtained in forested patches of the Limpopo, KwaZulu-Natal and Eastern Cape provinces exhibited a wide trophic niche width and generalised diet. Strong regional separation is apparent in the isotopic signatures suggesting little movement between provinces. A comparison of 13C-isotopes showed minimal variation that point to a uniformity in the carbon-base utilised by C. dichroa across their range. The 15N-signatures obtained in Limpopo, however, revealed a distinct trophic segregation between the northern-most Chorister populations and their southern counterparts. No altitudinal movements were detected in the isotopic signatures of recaptured Choristers, but more research is needed to investigate the long-term accuracy of these results and the breeding potential of resident Choristers in lowland coastal forests; especially when considering the reduced range and abundance reported for this endemic species.
- Full Text:
- Date Issued: 2015
- Authors: Wolmarans, Milena Helena Louise
- Date: 2015
- Subjects: Muscicapidae -- South Africa , Muscicapidae -- Food , Muscicapidae -- Habitat , Muscicapidae -- Habitat -- Conservation , Forest birds -- South Africa , Isotopes , Stable isotope tracers
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5920 , http://hdl.handle.net/10962/d1017207
- Description: Forested areas have been cited for their highly diverse floral and faunal assemblages, which are currently under threat from anthropogenic activities that restrict their range and deplete the resources produced within these naturally fragmented patches. Historically, up to 67 percent of avifaunal species associated with well-treed areas have undergone localised extinctions, consequentially affecting biodiversity as a measure of species richness and ecosystem functionality. To date, more than 900 of the bird species affiliated with forests are under threat and despite the theory surrounding functional redundancy, the mass extinction that is currently underway poses considerable limitations on the ecological integrity of these biomes. In South Africa, indigenous forest (one of the rarest biomes), occurs predominantly in small isolated patches along the eastern escarpment. With mountainous terrain emphasised as ‘prominent hotspots of extinction’, the limited dispersal and habitat sensitivity of montane forest fauna renders these species more prone to localised extinctions. BirdLife International, the IUCN and SABAP2 all indicate reductions in the range and abundance of the Chorister Robin-Chat (Cossypha dichroa) - an endemic forest specialist that is reported to move seasonally between high-altitude forest patches where they breed in summer, and lowland coastal forests where they overwinter. Beyond diet, body morphology and vocalisations, much of the information available on the altitudinal movements of C. dichroa is based on secondary sources and the assumptions therein. This study aimed to investigate the potential utilisation of δ13C and δ15N stable isotopes in determining the dietary niche width and altitudinal movements of C. dichroa. Feathers obtained in forested patches of the Limpopo, KwaZulu-Natal and Eastern Cape provinces exhibited a wide trophic niche width and generalised diet. Strong regional separation is apparent in the isotopic signatures suggesting little movement between provinces. A comparison of 13C-isotopes showed minimal variation that point to a uniformity in the carbon-base utilised by C. dichroa across their range. The 15N-signatures obtained in Limpopo, however, revealed a distinct trophic segregation between the northern-most Chorister populations and their southern counterparts. No altitudinal movements were detected in the isotopic signatures of recaptured Choristers, but more research is needed to investigate the long-term accuracy of these results and the breeding potential of resident Choristers in lowland coastal forests; especially when considering the reduced range and abundance reported for this endemic species.
- Full Text:
- Date Issued: 2015