Trading with selected SADC countries and economic growth in South Africa
- Authors: Malimba, Nwabisa
- Date: 2018
- Subjects: Southern African Development Community , Economic development -- South Africa South Africa -- Economic conditions -- 1991 Economic development -- Africa, Southern
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10948/31962 , vital:31867
- Description: This study empirically evaluates the impact of trading with SADC countries on the economic growth of South Africa (2010 -2016). The study used Fixed Effects Model to determine the relationship between economic growth of South Africa and the selected explanatory variables. The study made use of annual panel data from World Bank, Focus Economics and Trading economics. The relationship between South Africa’s economic growth and its determinants was examined using the procedure suggested in the literature by William (2017). Various tests were conducted to ensure that the relevant model is used and to produce reliable results. The results of a fixed effects model revealed that exports, imports and trade openness are statistically significant for South African economic growth. However, the p-values indicated that trade openness is the most statistically significant variable in explaining the variation in South African economic growth better than other explanatory variables confirm. Other variables that explained the fitness of the model for the data indicated that the model was a good fit. The implication of the results obtained from Fixed Effects model is that there was little trade between South Africa and selected SADC countries during the period under review. Trading with SADC countries has a negative effect on South African economy mainly because there was a decrease in exports to SADC over the past six years and that SADC countries still need to be more open to trade. Less intensive trading between SADC countries could be attributed to shortage of capital, infrastructure and skilled labour among SADC countries. The main trading partners of South Africa are countries that are characterised by being capital intensive and have highly skilled labour. In the light of the challenges that negatively affects trade in the SADC region, the study suggests that SADC should spell out the criteria that countries need to meet before they can become members of the union. These should be non-negotiable and ensure that member states harmonise their policies with those of SADC. The study also suggests that SADC countries should be more open to trade as it has been empirically proven that trade openness has a positive relationship with economic growth. Empirical evidence presents that countries with open, large and more developed neighbouring economies grow faster than those with closed, smaller, and less developed neighbouring economies. Trade should be intensified because there are potential gains to trading with SADC. It is further suggested that more focus should be given on work related training to improve the skills of our labour force. These suggestions are based on the belief that African countries have the ability to rescue themselves out of the vicious cycle of poverty.
- Full Text:
- Date Issued: 2018
- Authors: Malimba, Nwabisa
- Date: 2018
- Subjects: Southern African Development Community , Economic development -- South Africa South Africa -- Economic conditions -- 1991 Economic development -- Africa, Southern
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10948/31962 , vital:31867
- Description: This study empirically evaluates the impact of trading with SADC countries on the economic growth of South Africa (2010 -2016). The study used Fixed Effects Model to determine the relationship between economic growth of South Africa and the selected explanatory variables. The study made use of annual panel data from World Bank, Focus Economics and Trading economics. The relationship between South Africa’s economic growth and its determinants was examined using the procedure suggested in the literature by William (2017). Various tests were conducted to ensure that the relevant model is used and to produce reliable results. The results of a fixed effects model revealed that exports, imports and trade openness are statistically significant for South African economic growth. However, the p-values indicated that trade openness is the most statistically significant variable in explaining the variation in South African economic growth better than other explanatory variables confirm. Other variables that explained the fitness of the model for the data indicated that the model was a good fit. The implication of the results obtained from Fixed Effects model is that there was little trade between South Africa and selected SADC countries during the period under review. Trading with SADC countries has a negative effect on South African economy mainly because there was a decrease in exports to SADC over the past six years and that SADC countries still need to be more open to trade. Less intensive trading between SADC countries could be attributed to shortage of capital, infrastructure and skilled labour among SADC countries. The main trading partners of South Africa are countries that are characterised by being capital intensive and have highly skilled labour. In the light of the challenges that negatively affects trade in the SADC region, the study suggests that SADC should spell out the criteria that countries need to meet before they can become members of the union. These should be non-negotiable and ensure that member states harmonise their policies with those of SADC. The study also suggests that SADC countries should be more open to trade as it has been empirically proven that trade openness has a positive relationship with economic growth. Empirical evidence presents that countries with open, large and more developed neighbouring economies grow faster than those with closed, smaller, and less developed neighbouring economies. Trade should be intensified because there are potential gains to trading with SADC. It is further suggested that more focus should be given on work related training to improve the skills of our labour force. These suggestions are based on the belief that African countries have the ability to rescue themselves out of the vicious cycle of poverty.
- Full Text:
- Date Issued: 2018
Traditional, indigenous, or leafy?: A definition, typology, and way forward for African vegetables
- Towns, Alexander M, Shackleton, Charlie M
- Authors: Towns, Alexander M , Shackleton, Charlie M
- Date: 2018
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/179791 , vital:43189 , xlink:href="https://doi.org/10.1007/s12231-019-09448-1"
- Description: Around 1000 different species of indigenous and naturalized vegetables contribute to the dietary diversity, food security, and livelihoods of populations across sub-Saharan Africa. These foods are also a part of alimentary traditions and cultural identity, but have suffered as neglected and underutilized species. Slowly, African vegetables are beginning to gain the attention of universities, research centers, and development organizations; however, the terminology used to describe the plants is characterized by widespread disagreement and redundancy. Key terms and concepts used such as indigenous, traditional, and leafy have different interpretations and are used interchangeably, creating a challenge for coordinated research and extension efforts. Through analyzing a broad set of peer-reviewed journal articles on African vegetables, we (1) provide an overview with respect to definitions and terms used in the literature, (2) propose a definition of the term traditional African vegetable (TAV), (3) create a typology to classify the main groups of African vegetables, and (4) identify trends and gaps for further research and extension on African vegetables. We propose not only a unified way to categorize these vegetables but also a way for a more holistic and interdisciplinary systems approach to further the research agenda and practical management of African vegetables.
- Full Text:
- Date Issued: 2018
- Authors: Towns, Alexander M , Shackleton, Charlie M
- Date: 2018
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/179791 , vital:43189 , xlink:href="https://doi.org/10.1007/s12231-019-09448-1"
- Description: Around 1000 different species of indigenous and naturalized vegetables contribute to the dietary diversity, food security, and livelihoods of populations across sub-Saharan Africa. These foods are also a part of alimentary traditions and cultural identity, but have suffered as neglected and underutilized species. Slowly, African vegetables are beginning to gain the attention of universities, research centers, and development organizations; however, the terminology used to describe the plants is characterized by widespread disagreement and redundancy. Key terms and concepts used such as indigenous, traditional, and leafy have different interpretations and are used interchangeably, creating a challenge for coordinated research and extension efforts. Through analyzing a broad set of peer-reviewed journal articles on African vegetables, we (1) provide an overview with respect to definitions and terms used in the literature, (2) propose a definition of the term traditional African vegetable (TAV), (3) create a typology to classify the main groups of African vegetables, and (4) identify trends and gaps for further research and extension on African vegetables. We propose not only a unified way to categorize these vegetables but also a way for a more holistic and interdisciplinary systems approach to further the research agenda and practical management of African vegetables.
- Full Text:
- Date Issued: 2018
Transformation at Rhodes University: investigating the extent of support for the participation of students with disabilities in the transformation processes of the Institution
- Authors: Israel, Veronica
- Date: 2018
- Subjects: Rhodes University , Educational change -- South Africa -- Makhanda , Educational equalization -- South Africa -- Makhanda , College students with disabilities -- South Africa -- Makhanda , Students with disabilities -- Services for , Corporate culture -- South Africa -- Makhanda , Critical Disability Studies Approach (CDSA)
- Language: English
- Type: text , Thesis , Masters , MSocSc
- Identifier: http://hdl.handle.net/10962/62006 , vital:28095
- Description: This study is motivated by the vigorous discourse around transformation at Rhodes University and investigates the extent of support for and engagement with students with disabilities in the transformation processes of the institution. It analyses the extent to which integration is holistic at institutions of Higher Learning. Particular interest is given to the institutional culture of Rhodes University, namely whether it values and embraces diversity and is committed to inclusivity, centering the presence and voice of students with disabilities. It explores institutional responses to students with disabilities and their capacity to flourish beyond notions of access, therefore, delivering on the demand for institutional transformation. The thesis draws on the Critical Disability Studies Approach (CDSA), the social justice reform agenda with reference to the feminist analysis of disability, and the concept of inclusive education. The study uses a qualitative research methodology. The sample size used in the study was sufficient to highlight the challenges students with disabilities at Rhodes University face and their coping mechanisms while investigating the extent of support and active participation in the transformation discourse. The study found that the majority of the participants’ academic capabilities were influenced by their disability and impacted on their academic success. The study further revealed that there is a disjuncture between policy and practice in terms of awareness, and as such, effectiveness. While there is a supportive institutional framework, as indicated by more than 50% of the participants in the study, the recommendations ensuing from this research indicate that there are areas in which the university can improve its support mechanisms. Improving support structures is possible through establishing platforms which can be used for students to share their lived experiences and making disability a visible part of the institutional discourse on transformation. The study concludes by arguing for the application of principles of Ubuntu which demonstrate the commitment of Rhodes University in inculcating an inclusive institutional culture and understanding that disability is intersectional with social registers such as race and gender. It emphasises the recognition of the institution as a transforming one if the body that matters is the body whose presence, voice and lived experience is acknowledged and recognised.
- Full Text:
- Date Issued: 2018
- Authors: Israel, Veronica
- Date: 2018
- Subjects: Rhodes University , Educational change -- South Africa -- Makhanda , Educational equalization -- South Africa -- Makhanda , College students with disabilities -- South Africa -- Makhanda , Students with disabilities -- Services for , Corporate culture -- South Africa -- Makhanda , Critical Disability Studies Approach (CDSA)
- Language: English
- Type: text , Thesis , Masters , MSocSc
- Identifier: http://hdl.handle.net/10962/62006 , vital:28095
- Description: This study is motivated by the vigorous discourse around transformation at Rhodes University and investigates the extent of support for and engagement with students with disabilities in the transformation processes of the institution. It analyses the extent to which integration is holistic at institutions of Higher Learning. Particular interest is given to the institutional culture of Rhodes University, namely whether it values and embraces diversity and is committed to inclusivity, centering the presence and voice of students with disabilities. It explores institutional responses to students with disabilities and their capacity to flourish beyond notions of access, therefore, delivering on the demand for institutional transformation. The thesis draws on the Critical Disability Studies Approach (CDSA), the social justice reform agenda with reference to the feminist analysis of disability, and the concept of inclusive education. The study uses a qualitative research methodology. The sample size used in the study was sufficient to highlight the challenges students with disabilities at Rhodes University face and their coping mechanisms while investigating the extent of support and active participation in the transformation discourse. The study found that the majority of the participants’ academic capabilities were influenced by their disability and impacted on their academic success. The study further revealed that there is a disjuncture between policy and practice in terms of awareness, and as such, effectiveness. While there is a supportive institutional framework, as indicated by more than 50% of the participants in the study, the recommendations ensuing from this research indicate that there are areas in which the university can improve its support mechanisms. Improving support structures is possible through establishing platforms which can be used for students to share their lived experiences and making disability a visible part of the institutional discourse on transformation. The study concludes by arguing for the application of principles of Ubuntu which demonstrate the commitment of Rhodes University in inculcating an inclusive institutional culture and understanding that disability is intersectional with social registers such as race and gender. It emphasises the recognition of the institution as a transforming one if the body that matters is the body whose presence, voice and lived experience is acknowledged and recognised.
- Full Text:
- Date Issued: 2018
Transformation through engagement: developing Grade 9 leadership opportunities through activity system using change laboratory intervention in a secondary school in Omusati region of Namibia
- Authors: Vaino, Loide Mwasheka
- Date: 2018
- Subjects: School management and organization Namibia Omusati , Student participation in administration Namibia Omusati , Educational leadership Namibia Omusati , Student government Namibia Omusati
- Language: English
- Type: text , Thesis , Masters , MEd
- Identifier: http://hdl.handle.net/10962/61569 , vital:28038
- Description: The evolution of traditional educational leadership theory to contemporary leadership theory came as a response to an increased demand for better services in schools by creating platforms for learner leadership such as distributed leadership where learner leadership is located. This study of learner leadership is conducted in a secondary school in Omusati region of Namibia. Drawing on distributed leadership theory, the study sought to promote the distribution of leadership opportunities amongst all educational stakeholders, including learners, as provided for by policy and projected by educational leadership theory. The motivation of this study was the need to understand the problems associated with learner leadership as identified by past research. In addition, this study hoped to address the gap in the literature by exploring learner leadership development opportunities developing agency in learners through a Change Laboratory (CL) intervention. This study was as a transformative case study, how the grade 9s in the case study school were involved in leadership, the constraining factors that hindered the involvement of grade 9 learners in leadership, the enhancement of learner leadership at school, the positive contributions of CL workshops to participants and the leadership growth brought about by an intervention. This study generated data through observation, questionnaires, semi-structured interviews, focus group interviews, and Change Laboratory Workshops. The findings revealed that the grade 9 learners were marginally involved in leadership at the school. The most substantial challenge relates to traditional and outdated views of leadership on the part of teachers and educational managers. Additionally, the findings from the Change Laboratory workshops revealed that despite grade 9 learners being the youngest at school, they have the potential to be learner leaders. Hence in addition to several practical recommendations, the study recommends a change of mindset towards learner leadership so that opportunities are provided to contribute to the growth and development of learners. Finally, these research study findings will help my professional colleagues and policy makers in education to better understand the significance role of learner leadership involvements in schools.
- Full Text:
- Date Issued: 2018
- Authors: Vaino, Loide Mwasheka
- Date: 2018
- Subjects: School management and organization Namibia Omusati , Student participation in administration Namibia Omusati , Educational leadership Namibia Omusati , Student government Namibia Omusati
- Language: English
- Type: text , Thesis , Masters , MEd
- Identifier: http://hdl.handle.net/10962/61569 , vital:28038
- Description: The evolution of traditional educational leadership theory to contemporary leadership theory came as a response to an increased demand for better services in schools by creating platforms for learner leadership such as distributed leadership where learner leadership is located. This study of learner leadership is conducted in a secondary school in Omusati region of Namibia. Drawing on distributed leadership theory, the study sought to promote the distribution of leadership opportunities amongst all educational stakeholders, including learners, as provided for by policy and projected by educational leadership theory. The motivation of this study was the need to understand the problems associated with learner leadership as identified by past research. In addition, this study hoped to address the gap in the literature by exploring learner leadership development opportunities developing agency in learners through a Change Laboratory (CL) intervention. This study was as a transformative case study, how the grade 9s in the case study school were involved in leadership, the constraining factors that hindered the involvement of grade 9 learners in leadership, the enhancement of learner leadership at school, the positive contributions of CL workshops to participants and the leadership growth brought about by an intervention. This study generated data through observation, questionnaires, semi-structured interviews, focus group interviews, and Change Laboratory Workshops. The findings revealed that the grade 9 learners were marginally involved in leadership at the school. The most substantial challenge relates to traditional and outdated views of leadership on the part of teachers and educational managers. Additionally, the findings from the Change Laboratory workshops revealed that despite grade 9 learners being the youngest at school, they have the potential to be learner leaders. Hence in addition to several practical recommendations, the study recommends a change of mindset towards learner leadership so that opportunities are provided to contribute to the growth and development of learners. Finally, these research study findings will help my professional colleagues and policy makers in education to better understand the significance role of learner leadership involvements in schools.
- Full Text:
- Date Issued: 2018
Transformations in Hlengwe ethnicity in Chiredzi, Zimbabwe, 1890 to 2014
- Authors: Chisi, Taderera Hebert
- Date: 2018
- Subjects: Hlengwe (African people) -- Zimbabwe -- Chiredzi Rural District , Ethnicity -- Zimbabwe -- Chiredzi Rural District , Social constructionism , Black people -- Race identity -- Zimbabwe -- Chiredzi Rural District , Zimbabwe -- History , Imperialism -- History
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/62296 , vital:28152
- Description: Studies of ethnicity have shifted from primordialism to diverse variants of social constructivism, which include instrumentalism, invention of tribalism by the colonial elite and missionaries and demotic constructivism or creation of ethnicity from below. The studies have generally generated two broad schools of thought. One school avers that African ethnicity was invented by the colonial elite and missionaries in the colonial period whilst the other and more recent asserts that ethnicity had a precolonial currency and the generality of Africans also played a key role in identity formation. Also most notable is that most studies have tended to focus on larger and more visible ethnic groups, ignoring the stories of small communities mostly found in remote border areas of modern ‘nation’ states. Using archival material, colonial records, autobiographies, oral and secondary sources, this thesis, which is largely guided by the demotic constructivist theoretical perspective examines the evolution of the ethnic identity of an ‘obscure’ Hlengwe ethnic community of the south-east lowveld of Zimbabwe from the pre-colonial period to 2014. History of the Hlengwe history has been blurred by the use of the term “Shangaan” to denote the Hlengwe, yet they were not ethnically so. A chronological approach and demotic constuctivism have been used to enable a deeper analysis of the critical historical phases, key players and processes in Hlengwe identity formation as time wore on. While we acknowledge that identity formation involves diverse players, we also focus on the role of the generally neglected commoners in the making of African ethnicity. This study differs from other works on ethnicity which focus on events of short historical phases and the role of selected elitist agents in the making of African ethnicity, by analysing the making of Hlengwe ethnicity from the precolonial to the postcolonial period. We prove that Hlengwe ethnicity was created in the pre-colonial period but did not remain static as it was perpetually reshaped by unpredictable historical events right up to 2014. The Hlengwe community was subjected to processes of social transformation over a long period of time to an extent that the one time docile, ‘uncivilised”, inward looking community bearing an identity of shame had evolved by the close of the 20th century and early 21st century to an assertive community, proud of its identity and actively seeking political, economic and cultural recognition and rights for its ‘underdog’ Hlengwe constituency in a country where diverse Shona groups andNdebele form the dominant ethnic communities.
- Full Text:
- Date Issued: 2018
- Authors: Chisi, Taderera Hebert
- Date: 2018
- Subjects: Hlengwe (African people) -- Zimbabwe -- Chiredzi Rural District , Ethnicity -- Zimbabwe -- Chiredzi Rural District , Social constructionism , Black people -- Race identity -- Zimbabwe -- Chiredzi Rural District , Zimbabwe -- History , Imperialism -- History
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/62296 , vital:28152
- Description: Studies of ethnicity have shifted from primordialism to diverse variants of social constructivism, which include instrumentalism, invention of tribalism by the colonial elite and missionaries and demotic constructivism or creation of ethnicity from below. The studies have generally generated two broad schools of thought. One school avers that African ethnicity was invented by the colonial elite and missionaries in the colonial period whilst the other and more recent asserts that ethnicity had a precolonial currency and the generality of Africans also played a key role in identity formation. Also most notable is that most studies have tended to focus on larger and more visible ethnic groups, ignoring the stories of small communities mostly found in remote border areas of modern ‘nation’ states. Using archival material, colonial records, autobiographies, oral and secondary sources, this thesis, which is largely guided by the demotic constructivist theoretical perspective examines the evolution of the ethnic identity of an ‘obscure’ Hlengwe ethnic community of the south-east lowveld of Zimbabwe from the pre-colonial period to 2014. History of the Hlengwe history has been blurred by the use of the term “Shangaan” to denote the Hlengwe, yet they were not ethnically so. A chronological approach and demotic constuctivism have been used to enable a deeper analysis of the critical historical phases, key players and processes in Hlengwe identity formation as time wore on. While we acknowledge that identity formation involves diverse players, we also focus on the role of the generally neglected commoners in the making of African ethnicity. This study differs from other works on ethnicity which focus on events of short historical phases and the role of selected elitist agents in the making of African ethnicity, by analysing the making of Hlengwe ethnicity from the precolonial to the postcolonial period. We prove that Hlengwe ethnicity was created in the pre-colonial period but did not remain static as it was perpetually reshaped by unpredictable historical events right up to 2014. The Hlengwe community was subjected to processes of social transformation over a long period of time to an extent that the one time docile, ‘uncivilised”, inward looking community bearing an identity of shame had evolved by the close of the 20th century and early 21st century to an assertive community, proud of its identity and actively seeking political, economic and cultural recognition and rights for its ‘underdog’ Hlengwe constituency in a country where diverse Shona groups andNdebele form the dominant ethnic communities.
- Full Text:
- Date Issued: 2018
Transformative potential of social protection in fragile contexts : a case study of the social cash transfer pilot scheme on child wellbeing in Bomi County of Liberia
- Authors: Ngwerume, Christopher
- Date: 2018
- Subjects: Economic development -- Social aspects Political development -- Social aspects
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10353/13631 , vital:39686
- Description: The topic of social cash transfers is often viewed with scepticism. In the context of fragile states, questions of misuse, inaccessibility of social services, dependency and sustainability are often raised. This study sought to examine the transformative potential of social cash transfers on child wellbeing in fragile contexts through a case study of the social cash transfer pilot scheme in Bomi County of Liberia. The study specifically set out to to assess the relevance of cash transfers in the context of child wellbeing; determine how the wellbeing of child recipients of cash transfers had transformed; and analyse the determinants of the transformative effects of cash transfers on child wellbeing. The study adopted a quasi-experimental, mixed method, and cross-sectional research design. It utilised existing household survey datasets of the mid term and end term evaluations of the Bomi County pilot social cash transfer scheme conducted in Liberia in 2012 and 2015 respectively. A sample size of 224 (about 12percent of the sample frame) was used where Confidence Level was 95percent and P=0.5. This sample size was divided equally between households receiving cash (experimental group) and households with the same characteristics although not receiving cash transfers (control group). For the qualitative method, 66 participants were purposively sampled. A total of 34 participants participated in the indepth interviews, 32 children were sampled for focus group discussions. These were divided into 16 children from the experimental group and 16 children from the control group. Quantitative data sets were analysed in Statistical Package for Social Sciences (SPSS), and qualitative data was analysed through thematic analysis. The findings from the study provide a persuasive case for the transformative potential of social protection in fragile contexts. The study confirms the relevance of social cash transfers in promoting child wellbeing through empowering families to address children‘s physical and dependency-related vulnerabilities and institutional disadvantage. The study also confirms the transformative effects of social cash transfers on child health, food consumption, education, housing conditions, household assets, and child labour. In addition, the results indicate that social cash transfers mitigated gender based institutionalised disadvantage, created safe and protective environments for children and positively impacted on the local economy. However, the study also showed that, to a limited extent, social cash transfers had unintended impacts, particularly increase in child labour, where children were requested to sell in family petty businesses, and instances in which recipients misused the cash. The transformative effects of social cash transfers on child wellbeing were dependent on the size of the transfer, priorities in the use of cash, decision-making dynamics, and fairness of the selection process. The study proffers a Child Sensitive Transformative Social Cash Transfer Model based on the determinants of the impact of social cash transfer. The study ends by highlighting the critical role of social protection in infusing a transformative dimension to social work practice in fragile contexts, with a view to addressing equity, gender equality and child rights through confronting child vulnerabilities and institutionalised disadvantage.
- Full Text:
- Date Issued: 2018
- Authors: Ngwerume, Christopher
- Date: 2018
- Subjects: Economic development -- Social aspects Political development -- Social aspects
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10353/13631 , vital:39686
- Description: The topic of social cash transfers is often viewed with scepticism. In the context of fragile states, questions of misuse, inaccessibility of social services, dependency and sustainability are often raised. This study sought to examine the transformative potential of social cash transfers on child wellbeing in fragile contexts through a case study of the social cash transfer pilot scheme in Bomi County of Liberia. The study specifically set out to to assess the relevance of cash transfers in the context of child wellbeing; determine how the wellbeing of child recipients of cash transfers had transformed; and analyse the determinants of the transformative effects of cash transfers on child wellbeing. The study adopted a quasi-experimental, mixed method, and cross-sectional research design. It utilised existing household survey datasets of the mid term and end term evaluations of the Bomi County pilot social cash transfer scheme conducted in Liberia in 2012 and 2015 respectively. A sample size of 224 (about 12percent of the sample frame) was used where Confidence Level was 95percent and P=0.5. This sample size was divided equally between households receiving cash (experimental group) and households with the same characteristics although not receiving cash transfers (control group). For the qualitative method, 66 participants were purposively sampled. A total of 34 participants participated in the indepth interviews, 32 children were sampled for focus group discussions. These were divided into 16 children from the experimental group and 16 children from the control group. Quantitative data sets were analysed in Statistical Package for Social Sciences (SPSS), and qualitative data was analysed through thematic analysis. The findings from the study provide a persuasive case for the transformative potential of social protection in fragile contexts. The study confirms the relevance of social cash transfers in promoting child wellbeing through empowering families to address children‘s physical and dependency-related vulnerabilities and institutional disadvantage. The study also confirms the transformative effects of social cash transfers on child health, food consumption, education, housing conditions, household assets, and child labour. In addition, the results indicate that social cash transfers mitigated gender based institutionalised disadvantage, created safe and protective environments for children and positively impacted on the local economy. However, the study also showed that, to a limited extent, social cash transfers had unintended impacts, particularly increase in child labour, where children were requested to sell in family petty businesses, and instances in which recipients misused the cash. The transformative effects of social cash transfers on child wellbeing were dependent on the size of the transfer, priorities in the use of cash, decision-making dynamics, and fairness of the selection process. The study proffers a Child Sensitive Transformative Social Cash Transfer Model based on the determinants of the impact of social cash transfer. The study ends by highlighting the critical role of social protection in infusing a transformative dimension to social work practice in fragile contexts, with a view to addressing equity, gender equality and child rights through confronting child vulnerabilities and institutionalised disadvantage.
- Full Text:
- Date Issued: 2018
Transforming while transferring: An exploratory study of how transferability of skills is key in the transformation of higher education
- Bazana, Sandiso, McLaren, Logan, Kabungaidze, Trust
- Authors: Bazana, Sandiso , McLaren, Logan , Kabungaidze, Trust
- Date: 2018
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/453793 , vital:75286 , xlink:href="https://hdl.handle.net/10520/EJC-102f9d32bf"
- Description: The importance of skills within the transformation of higher education is a crucial factor that has been insufficiently considered. Transformation in terms of higher education forms a fundamental part of the post-apartheid South African society. This transformation movement seems to exclude the possible role and contributions of the older generation of academics. Using a social constructionist viewpoint, this qualitative study sought to bring to the debate of transformation of higher education the important question of skills transferability between older generation academics and the new generation. From interviewing five retired white academics, the study found that institutional culture and implementation of labour legislation through the Human Resources department by the university in question affect the transferability of skills and that proper programmes of voluntary mentorship should be put in place as to allow the growth of both the older generation and new generation academics. The use of new generation academics’ perspectives could yield more results and findings that can further this area of study, as well as allow a more diverse and richer understanding of the perception of skills transferability within the transformation of higher education institutions. This further understanding for research is needed to emphasise the importance of knowledge production through the integration of both young academics’ as well as older academics’ perspectives. This is to be achieved by engaging with other universities and academics, so that a broader analysis of skills transferability within higher education can be understood.
- Full Text:
- Date Issued: 2018
- Authors: Bazana, Sandiso , McLaren, Logan , Kabungaidze, Trust
- Date: 2018
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/453793 , vital:75286 , xlink:href="https://hdl.handle.net/10520/EJC-102f9d32bf"
- Description: The importance of skills within the transformation of higher education is a crucial factor that has been insufficiently considered. Transformation in terms of higher education forms a fundamental part of the post-apartheid South African society. This transformation movement seems to exclude the possible role and contributions of the older generation of academics. Using a social constructionist viewpoint, this qualitative study sought to bring to the debate of transformation of higher education the important question of skills transferability between older generation academics and the new generation. From interviewing five retired white academics, the study found that institutional culture and implementation of labour legislation through the Human Resources department by the university in question affect the transferability of skills and that proper programmes of voluntary mentorship should be put in place as to allow the growth of both the older generation and new generation academics. The use of new generation academics’ perspectives could yield more results and findings that can further this area of study, as well as allow a more diverse and richer understanding of the perception of skills transferability within the transformation of higher education institutions. This further understanding for research is needed to emphasise the importance of knowledge production through the integration of both young academics’ as well as older academics’ perspectives. This is to be achieved by engaging with other universities and academics, so that a broader analysis of skills transferability within higher education can be understood.
- Full Text:
- Date Issued: 2018
Traversing ethical imperatives: Learning from stories from the field
- Treharne, Gareth J, Mnyaka, Phindezwa, Marx, Jacqueline, Macleod, Catriona I
- Authors: Treharne, Gareth J , Mnyaka, Phindezwa , Marx, Jacqueline , Macleod, Catriona I
- Date: 2018
- Subjects: To be catalogued
- Language: English
- Type: text , book chapter
- Identifier: http://hdl.handle.net/10962/434279 , vital:73044 , ISBN 978-3-319-74720-0 , https://link.springer.com/chapter/10.1007/978-3-319-74721-7_28
- Description: In this chapter we integrate the lessons that are shared across this handbook through the rich, storied examples of ethics in critical research. We outline central themes to the handbook that cut across all of the sections. The notions of vulnerability and harm are pertinent in critical research not only as a duty to protect participants, but also as signifiers that are mobilised and can constrain what is achieved in critical research. The stories told in this handbook contribute to ongoing learning about ethics in critical research by drawing on ethically important moments in the unfolding research processes. We ask whether ethical critical research requires relational models of reciprocity between researchers and participants/co-researchers and appreciation of situated ethics in the bureaucratic review processes.
- Full Text:
- Date Issued: 2018
- Authors: Treharne, Gareth J , Mnyaka, Phindezwa , Marx, Jacqueline , Macleod, Catriona I
- Date: 2018
- Subjects: To be catalogued
- Language: English
- Type: text , book chapter
- Identifier: http://hdl.handle.net/10962/434279 , vital:73044 , ISBN 978-3-319-74720-0 , https://link.springer.com/chapter/10.1007/978-3-319-74721-7_28
- Description: In this chapter we integrate the lessons that are shared across this handbook through the rich, storied examples of ethics in critical research. We outline central themes to the handbook that cut across all of the sections. The notions of vulnerability and harm are pertinent in critical research not only as a duty to protect participants, but also as signifiers that are mobilised and can constrain what is achieved in critical research. The stories told in this handbook contribute to ongoing learning about ethics in critical research by drawing on ethically important moments in the unfolding research processes. We ask whether ethical critical research requires relational models of reciprocity between researchers and participants/co-researchers and appreciation of situated ethics in the bureaucratic review processes.
- Full Text:
- Date Issued: 2018
Trophic ecology of adult male O donata. II. D ietary contributions of aquatic food sources
- Chari, Lenin D, Moyo, Sydney, Richoux, Nicole B
- Authors: Chari, Lenin D , Moyo, Sydney , Richoux, Nicole B
- Date: 2018
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/456403 , vital:75510 , xlink:href="https://doi.org/10.1111/een.12459"
- Description: 1. Insects that emerge from rivers provide nutritional subsidies to local riparian predators. Adult damselflies and dragonflies often benefit from aquatic resources, but their high mobility and evasiveness have made it difficult to monitor their diets. 2. A dual fatty acid and stable isotope analysis approach was used to investigate the links between Odonata size and behaviour with proportions of their aquatically derived nutri-tional sources. Additionally, the study investigated the variation in die-tary contributions of aquatic food sources to Odonata between two sec-tions of a river, each with different aquatic productivity rates. 3. Varia-tions in body size and foraging method of Odonata in the Kowie River (South Africa) contributed to differences in the contributions of aquatic food sources to their diets. Large Odonata that consumed prey in flight had smaller proportions of aquatic indicator fatty acids and stable iso-tope‐generated proportions of aquatic food sources than did the smaller Odonata that consumed prey from perches. 4. There was a considera-ble amount of interspecific variation in indicators of aquatic feeding, but Odonata at an upstream site had smaller proportions of aquatic indica-tors than those at a downstream site which had higher insect emer-gence rates. 5. The findings of this study contribute information on the dynamics of feeding ecology among adult Odonata, and the substantial contributions of aquatic prey (>80% of total diet in some cases) indicat-ed that cross‐boundary trophic linkages via odonates are strong in the Kowie River.
- Full Text:
- Date Issued: 2018
- Authors: Chari, Lenin D , Moyo, Sydney , Richoux, Nicole B
- Date: 2018
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/456403 , vital:75510 , xlink:href="https://doi.org/10.1111/een.12459"
- Description: 1. Insects that emerge from rivers provide nutritional subsidies to local riparian predators. Adult damselflies and dragonflies often benefit from aquatic resources, but their high mobility and evasiveness have made it difficult to monitor their diets. 2. A dual fatty acid and stable isotope analysis approach was used to investigate the links between Odonata size and behaviour with proportions of their aquatically derived nutri-tional sources. Additionally, the study investigated the variation in die-tary contributions of aquatic food sources to Odonata between two sec-tions of a river, each with different aquatic productivity rates. 3. Varia-tions in body size and foraging method of Odonata in the Kowie River (South Africa) contributed to differences in the contributions of aquatic food sources to their diets. Large Odonata that consumed prey in flight had smaller proportions of aquatic indicator fatty acids and stable iso-tope‐generated proportions of aquatic food sources than did the smaller Odonata that consumed prey from perches. 4. There was a considera-ble amount of interspecific variation in indicators of aquatic feeding, but Odonata at an upstream site had smaller proportions of aquatic indica-tors than those at a downstream site which had higher insect emer-gence rates. 5. The findings of this study contribute information on the dynamics of feeding ecology among adult Odonata, and the substantial contributions of aquatic prey (>80% of total diet in some cases) indicat-ed that cross‐boundary trophic linkages via odonates are strong in the Kowie River.
- Full Text:
- Date Issued: 2018
Trophic ecology of adult male Odonata. I. Dietary niche metrics by foraging guild, species, body size, and location
- Chari, Lenin D, Moyo, Sydney, Richoux, Nicole B
- Authors: Chari, Lenin D , Moyo, Sydney , Richoux, Nicole B
- Date: 2018
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/456379 , vital:75508 , xlink:href="https://doi.org/10.1111/een.12458"
- Description: 1. Information on the dietary niches of adult odonates is sparse, as they are highly mobile and evasive animals, which makes them difficult to observe in their natural habitat. Moreover, there is a lack of knowledge on how varying behavioural traits of odonates relate to phenomena like niche partitioning. 2. This study investigated niche partitioning amongst odonate species, foraging guilds and size classes in a riverine system in the Eastern Cape province of South Africa. A combination of stable isotope and fatty acid‐based niches was used to infer odonate feeding. 3. Both fatty acid and stable isotope‐based niches showed that there was niche separation amongst odonates that forage in flight (fliers) and those that forage from a perch (perchers), amongst odonates of different size classes (damselflies, medium‐ and large‐sized dragonflies), and amongst species, although varying levels of niche overlap were observed in each case. 4. Niche sizes of odonates varied between an upstream and a downstream site. Generally greater niche overlap was recorded at the narrow upstream site (associated with low insect emergence rates) than the wider downstream site (associated with high insect emergence rates), indicating that a greater degree of resource sharing occurred at the upstream site where aquatic food was less abundant. 5. The findings of this study suggest that dietary niches of odonates can be influenced by foraging guild, body size, and/or environmental conditions, and additional study in a variety of regions is recommended to determine the greater applicability of these findings.
- Full Text:
- Date Issued: 2018
- Authors: Chari, Lenin D , Moyo, Sydney , Richoux, Nicole B
- Date: 2018
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/456379 , vital:75508 , xlink:href="https://doi.org/10.1111/een.12458"
- Description: 1. Information on the dietary niches of adult odonates is sparse, as they are highly mobile and evasive animals, which makes them difficult to observe in their natural habitat. Moreover, there is a lack of knowledge on how varying behavioural traits of odonates relate to phenomena like niche partitioning. 2. This study investigated niche partitioning amongst odonate species, foraging guilds and size classes in a riverine system in the Eastern Cape province of South Africa. A combination of stable isotope and fatty acid‐based niches was used to infer odonate feeding. 3. Both fatty acid and stable isotope‐based niches showed that there was niche separation amongst odonates that forage in flight (fliers) and those that forage from a perch (perchers), amongst odonates of different size classes (damselflies, medium‐ and large‐sized dragonflies), and amongst species, although varying levels of niche overlap were observed in each case. 4. Niche sizes of odonates varied between an upstream and a downstream site. Generally greater niche overlap was recorded at the narrow upstream site (associated with low insect emergence rates) than the wider downstream site (associated with high insect emergence rates), indicating that a greater degree of resource sharing occurred at the upstream site where aquatic food was less abundant. 5. The findings of this study suggest that dietary niches of odonates can be influenced by foraging guild, body size, and/or environmental conditions, and additional study in a variety of regions is recommended to determine the greater applicability of these findings.
- Full Text:
- Date Issued: 2018
Trophic preference of southern African dung beetles (Scarabaeoidea: Scarabaeinae and Aphodiinae) and its influence on bioindicator surveys:
- Tocco, Claudia, Balmer, Jonathan P, Villet, Martin H
- Authors: Tocco, Claudia , Balmer, Jonathan P , Villet, Martin H
- Date: 2018
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/140796 , vital:37919 , DOI: 10.1111/aje.12523
- Description: Environmental assessments using bioindicators gain value if the interpretability of the indicator used is high, and it is clear how survey methods affect survey comparisons. Because dung beetles are favoured as bioindicators, we studied the trophic preference of a southern African beetle community and its potential effects on surveys of beetle diversity using manual sampling of droppings and pitfall traps baited with carnivore, ruminant or nonruminant dung. Manual sampling showed no significant differences between dung types in either dung beetles abundance or species richness. Generalised linear mixed models of total and endocoprid abundances, species richness and Real Shannon index of trap samples showed higher dung beetle diversity associated with ruminant than with nonruminant dung, which in turn was significantly preferred over carnivore dung.
- Full Text:
- Date Issued: 2018
- Authors: Tocco, Claudia , Balmer, Jonathan P , Villet, Martin H
- Date: 2018
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/140796 , vital:37919 , DOI: 10.1111/aje.12523
- Description: Environmental assessments using bioindicators gain value if the interpretability of the indicator used is high, and it is clear how survey methods affect survey comparisons. Because dung beetles are favoured as bioindicators, we studied the trophic preference of a southern African beetle community and its potential effects on surveys of beetle diversity using manual sampling of droppings and pitfall traps baited with carnivore, ruminant or nonruminant dung. Manual sampling showed no significant differences between dung types in either dung beetles abundance or species richness. Generalised linear mixed models of total and endocoprid abundances, species richness and Real Shannon index of trap samples showed higher dung beetle diversity associated with ruminant than with nonruminant dung, which in turn was significantly preferred over carnivore dung.
- Full Text:
- Date Issued: 2018
Two-tissue stable isotope analysis to elucidate isotopic incorporation and trophic niche patterns for chubbyhead barb Enteromius anoplus
- Authors: Kambikambi, Manda Juliet
- Date: 2018
- Subjects: Food chains (Ecology) , Barbus -- South Africa -- Great Fish River Estuary , Stable isotopes , Freshwater fishes -- Feeding and feeds , Freshwater fishes -- Food , Fins (Anatomy) , Akaike Information Criterion , Freshwater fishes -- Conservation , Chubbyhead barb Enteromius anoplus
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/61906 , vital:28082
- Description: Knowledge of trophic ecology underpins conservation and management of threatened species. Stable isotope analysis has been widely used as a more objective approach for elucidating the trophic positions of freshwater fishes. Until recently, stable isotope analysis for trophic ecology studies in freshwater fishes largely utilised white muscle tissue. This sampling approach, however, involves either euthanasia or muscle biopsy procedures that may be inappropriate for small-sized and endangered fishes. These concerns raised the need to explore and validate the utility of non-lethal alternatives such as fin clips, mucus and scales. The present study investigated the use of caudal fin tissue as a potential non-lethal alternative to muscle tissue for trophic studies on the chubbyhead barb Enteromius anoplus. The chubbyhead barb was selected as a model taxon for the present study because it is closely related or comparable in body size to a number of highly threatened small-bodied minnows in southern Africa. The chubbyhead barb was also considered an ideal species for this study because it is widespread, abundant and classified as Least Concern on the IUCN list of threatened species. The study used a two-pronged approach based on laboratory and field experiments. A laboratory experiment was conducted to quantify isotopic turnover rates and diet-tissue discrimination factors (DTDFs/A) for both muscle and fin tissues. This involved feeding chubbyhead barb two diets with distinct carbon (δ13C) and nitrogen (δ15N) values, and monitoring the temporal isotopic incorporation patterns into the two tissues. These patterns were assessed by applying least squares non-linear one- and two-compartment isotopic kinetics models. Model comparisons, based on Akaike information criterion (AIC), revealed that one- compartment models described isotopic incorporation patterns better than two-compartment models for both muscle and fin tissues. For δ13C, relatively short and comparable turnover rates were observed for muscle and fin tissues, which suggests that fin tissue could potentially provide similar inference as muscle tissue when assessing short term dietary patterns for chubbyhead barb. In contrast to δ13C, turnover rates for δ15N between muscle and fin tissue were different for both diets. Specifically, stable isotope incorporation turnover rate was faster in muscle tissue for animals that were fed on isotopically enriched diets compared to fin tissue. Conversely, stable isotope incorporation into fin tissue was faster in animals fed on isotopically depleted diets compared to muscle tissue. This suggests that knowledge of animal diet is critical when inferring fin tissue δ15N turnover rates, particularly when extrapolating both short and long term dietary patterns. Diet-tissue discrimination factors were influenced by diet type, with the fish fed on isotopically enriched diet having lower DTDFs than animals fed on isotopically depleted diets. This variation may be explained by the protein quality hypothesis, which suggests that the DTDFs of consumers will decrease as protein quality increases. When A13C and A15N values were averaged across diets in muscle and fin tissue, the values were 0.74‰ and 0.64‰, respectively, for A13C, and 5.53‰ and 5.83 ‰, respectively, for A15N. This appeared to be consistent with studies on other taxa for A13C (0-1 ‰), but for A15N (3-5 ‰) the results of this study were higher than those reported for other taxa. These results suggest that investigating appropriate DTDFs for both muscle and fin tissues is important in trophic ecology studies of these minnows. A field-based study was conducted to investigate temporal dynamics in food web patterns for chubbyhead barb in the wild within the headwaters of the Koonap River, a tributary of the Great Fish River, in the Eastern Cape, South Africa. This was achieved by collecting and comparing stable isotope data for chubbyhead barb and its potential food sources on a seasonal scale. There was a discernible difference in both the composition of carbon and nitrogen isotope values for basal food sources and macroinvertebrate communities, which suggests that this headwater stream was subject to temporal changes in food web dynamics. For chubbyhead barb, comparison of its isotopic niche sizes on a temporal scale based on both muscle and fin tissue showed differences across seasons. Furthermore, isotopic niche sizes inferred from fin tissue were larger than those inferred from muscle tissue during winter and spring, whereas during summer and autumn the isotopic niche sizes inferred from muscle and fin tissue were generally comparable. This suggests the likely influence of different metabolic and physiological processes that these two tissues undergo on a temporal scale. Therefore, difference in tissue type, and their associated metabolic pathways should be considered when using fin tissue as a substitute for muscle tissue on broad temporal scales. The results from this study indicated that caudal fin tissue has the potential to be a substitute for muscle in trophic studies of chubbyhead barb Enteromius anoplus, as well as other related small bodied endangered minnow species from South Africa.
- Full Text:
- Date Issued: 2018
- Authors: Kambikambi, Manda Juliet
- Date: 2018
- Subjects: Food chains (Ecology) , Barbus -- South Africa -- Great Fish River Estuary , Stable isotopes , Freshwater fishes -- Feeding and feeds , Freshwater fishes -- Food , Fins (Anatomy) , Akaike Information Criterion , Freshwater fishes -- Conservation , Chubbyhead barb Enteromius anoplus
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/61906 , vital:28082
- Description: Knowledge of trophic ecology underpins conservation and management of threatened species. Stable isotope analysis has been widely used as a more objective approach for elucidating the trophic positions of freshwater fishes. Until recently, stable isotope analysis for trophic ecology studies in freshwater fishes largely utilised white muscle tissue. This sampling approach, however, involves either euthanasia or muscle biopsy procedures that may be inappropriate for small-sized and endangered fishes. These concerns raised the need to explore and validate the utility of non-lethal alternatives such as fin clips, mucus and scales. The present study investigated the use of caudal fin tissue as a potential non-lethal alternative to muscle tissue for trophic studies on the chubbyhead barb Enteromius anoplus. The chubbyhead barb was selected as a model taxon for the present study because it is closely related or comparable in body size to a number of highly threatened small-bodied minnows in southern Africa. The chubbyhead barb was also considered an ideal species for this study because it is widespread, abundant and classified as Least Concern on the IUCN list of threatened species. The study used a two-pronged approach based on laboratory and field experiments. A laboratory experiment was conducted to quantify isotopic turnover rates and diet-tissue discrimination factors (DTDFs/A) for both muscle and fin tissues. This involved feeding chubbyhead barb two diets with distinct carbon (δ13C) and nitrogen (δ15N) values, and monitoring the temporal isotopic incorporation patterns into the two tissues. These patterns were assessed by applying least squares non-linear one- and two-compartment isotopic kinetics models. Model comparisons, based on Akaike information criterion (AIC), revealed that one- compartment models described isotopic incorporation patterns better than two-compartment models for both muscle and fin tissues. For δ13C, relatively short and comparable turnover rates were observed for muscle and fin tissues, which suggests that fin tissue could potentially provide similar inference as muscle tissue when assessing short term dietary patterns for chubbyhead barb. In contrast to δ13C, turnover rates for δ15N between muscle and fin tissue were different for both diets. Specifically, stable isotope incorporation turnover rate was faster in muscle tissue for animals that were fed on isotopically enriched diets compared to fin tissue. Conversely, stable isotope incorporation into fin tissue was faster in animals fed on isotopically depleted diets compared to muscle tissue. This suggests that knowledge of animal diet is critical when inferring fin tissue δ15N turnover rates, particularly when extrapolating both short and long term dietary patterns. Diet-tissue discrimination factors were influenced by diet type, with the fish fed on isotopically enriched diet having lower DTDFs than animals fed on isotopically depleted diets. This variation may be explained by the protein quality hypothesis, which suggests that the DTDFs of consumers will decrease as protein quality increases. When A13C and A15N values were averaged across diets in muscle and fin tissue, the values were 0.74‰ and 0.64‰, respectively, for A13C, and 5.53‰ and 5.83 ‰, respectively, for A15N. This appeared to be consistent with studies on other taxa for A13C (0-1 ‰), but for A15N (3-5 ‰) the results of this study were higher than those reported for other taxa. These results suggest that investigating appropriate DTDFs for both muscle and fin tissues is important in trophic ecology studies of these minnows. A field-based study was conducted to investigate temporal dynamics in food web patterns for chubbyhead barb in the wild within the headwaters of the Koonap River, a tributary of the Great Fish River, in the Eastern Cape, South Africa. This was achieved by collecting and comparing stable isotope data for chubbyhead barb and its potential food sources on a seasonal scale. There was a discernible difference in both the composition of carbon and nitrogen isotope values for basal food sources and macroinvertebrate communities, which suggests that this headwater stream was subject to temporal changes in food web dynamics. For chubbyhead barb, comparison of its isotopic niche sizes on a temporal scale based on both muscle and fin tissue showed differences across seasons. Furthermore, isotopic niche sizes inferred from fin tissue were larger than those inferred from muscle tissue during winter and spring, whereas during summer and autumn the isotopic niche sizes inferred from muscle and fin tissue were generally comparable. This suggests the likely influence of different metabolic and physiological processes that these two tissues undergo on a temporal scale. Therefore, difference in tissue type, and their associated metabolic pathways should be considered when using fin tissue as a substitute for muscle tissue on broad temporal scales. The results from this study indicated that caudal fin tissue has the potential to be a substitute for muscle in trophic studies of chubbyhead barb Enteromius anoplus, as well as other related small bodied endangered minnow species from South Africa.
- Full Text:
- Date Issued: 2018
Understanding and quantifying channel transmission loss processes in the Limpopo River Basin
- Authors: Mvandaba, Vuyelwa
- Date: 2018
- Subjects: Water-supply -- Management , Water-supply -- Limpopo River Watershed , Alluvium -- Limpopo River Watershed , Streamflow -- Limpopo River Watershed
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/63797 , vital:28490
- Description: Water availability is one of the major societal issues facing the world. The ability to understand and quantify the impact of key hydrological processes on the availability of water resources is therefore integral to ensuring equitable and sustainable resource management. A review of previous hydrological studies conducted in the Limpopo River Basin has revealed a gap in the understanding of surface water-groundwater interactions, particularly channel transmission loss processes. These earlier studies, focused largely on the Limpopo River’s main stem, have attributed the existence of these streamflow losses to the presence of significant alluvial aquifers and indicated that the losses account for about 30 percent (or 1000 Mm3 a-1) of the basin’s water balance. The work conducted in this dissertation reports on the delineation of alluvial aquifers across three sub-basins of the Limpopo River Basin namely, the Mokolo (South Africa), Motloutse (Botswana) and Mzingwane (Zimbabwe) sub-basins and the estimation of potential channel transmission losses based on the alluvial aquifer properties. Additionally, an assessment of the different approaches that can be applied to simulate these channel transmission losses in the Pitman Model is presented. To delineate alluvial aquifers, general land cover classes including alluvial aquifers were produced from Landsat-8 imagery through image classification. The areal extent of the delineated alluvial aquifers was calculated using ArcMap 10.3. To quantify channel transmission losses and determine the effects on regional water resources, three approaches using the Pitman model were applied. The three approaches include an explicit transmission loss function, the use of a wetland function to represent channel-floodplain storage exchanges and the use of a ‘dummy’ reservoir to represent floodplain storage and evapotranspiration losses. Results indicate that all three approaches were able to simulate channel transmission losses, although with differing magnitudes. Observed monthly flow data were used to as a means of validating loss simulations however for each sub-basin, medium and low flows were over-simulated which accounts for water uses that were inefficiently represented due to lack of data. Knowledge of the structure of the transmission loss function dictates that it is better at representing the dynamics of channel transmission losses, as it takes into account the contribution of losses to groundwater recharge whereas the other two functions simply store water and release it back to the channel. Overall, the hydrological modelling results demonstrate the potential of each approach in reproducing the dynamics of channel transmission losses between channel and alluvial aquifer within an existing sub-basin scale hydrological model. It is believed that better quantification of losses and more efficient qualitative determination of the function which best represents transmission losses, can be attained with more reliable observed data. In conclusion, a study of this nature can be beneficial to water resource estimation programmes as it highlights the uncertainties related with quantifying channel transmission loss processes in a semi-arid environment.
- Full Text:
- Date Issued: 2018
- Authors: Mvandaba, Vuyelwa
- Date: 2018
- Subjects: Water-supply -- Management , Water-supply -- Limpopo River Watershed , Alluvium -- Limpopo River Watershed , Streamflow -- Limpopo River Watershed
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/63797 , vital:28490
- Description: Water availability is one of the major societal issues facing the world. The ability to understand and quantify the impact of key hydrological processes on the availability of water resources is therefore integral to ensuring equitable and sustainable resource management. A review of previous hydrological studies conducted in the Limpopo River Basin has revealed a gap in the understanding of surface water-groundwater interactions, particularly channel transmission loss processes. These earlier studies, focused largely on the Limpopo River’s main stem, have attributed the existence of these streamflow losses to the presence of significant alluvial aquifers and indicated that the losses account for about 30 percent (or 1000 Mm3 a-1) of the basin’s water balance. The work conducted in this dissertation reports on the delineation of alluvial aquifers across three sub-basins of the Limpopo River Basin namely, the Mokolo (South Africa), Motloutse (Botswana) and Mzingwane (Zimbabwe) sub-basins and the estimation of potential channel transmission losses based on the alluvial aquifer properties. Additionally, an assessment of the different approaches that can be applied to simulate these channel transmission losses in the Pitman Model is presented. To delineate alluvial aquifers, general land cover classes including alluvial aquifers were produced from Landsat-8 imagery through image classification. The areal extent of the delineated alluvial aquifers was calculated using ArcMap 10.3. To quantify channel transmission losses and determine the effects on regional water resources, three approaches using the Pitman model were applied. The three approaches include an explicit transmission loss function, the use of a wetland function to represent channel-floodplain storage exchanges and the use of a ‘dummy’ reservoir to represent floodplain storage and evapotranspiration losses. Results indicate that all three approaches were able to simulate channel transmission losses, although with differing magnitudes. Observed monthly flow data were used to as a means of validating loss simulations however for each sub-basin, medium and low flows were over-simulated which accounts for water uses that were inefficiently represented due to lack of data. Knowledge of the structure of the transmission loss function dictates that it is better at representing the dynamics of channel transmission losses, as it takes into account the contribution of losses to groundwater recharge whereas the other two functions simply store water and release it back to the channel. Overall, the hydrological modelling results demonstrate the potential of each approach in reproducing the dynamics of channel transmission losses between channel and alluvial aquifer within an existing sub-basin scale hydrological model. It is believed that better quantification of losses and more efficient qualitative determination of the function which best represents transmission losses, can be attained with more reliable observed data. In conclusion, a study of this nature can be beneficial to water resource estimation programmes as it highlights the uncertainties related with quantifying channel transmission loss processes in a semi-arid environment.
- Full Text:
- Date Issued: 2018
Understanding Collective Learning and Human Agency in Diverse Social, Cultural and Material Settings
- Olvitt, Lausanne L, Lotz-Sisitka, Heila, Læssøe, Jeppe, Jordt Jørgensen, Nanna
- Authors: Olvitt, Lausanne L , Lotz-Sisitka, Heila , Læssøe, Jeppe , Jordt Jørgensen, Nanna
- Date: 2018
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/127226 , vital:35979 , https://www.ajol.info/index.php/sajee/article/view/172221/161620
- Description: The significance of environment and sustainability education research and practice, and its potential contribution to a sustainable future for humanity, is conveyed by the International Social Science Council (n.d.), which explains: People everywhere will need to learn how to create new forms of human activity and new social systems that are more sustainable and socially just. However, we have limited knowledge about the type of learning that creates such change, how such learning emerges, or how it can be scaled-up to create transformations at many levels.Here, the important shift is towards considering what social systems, forms of knowledge, learning processes and questions of justice are associated with perpetuating or halting the decline of Earth’s bio-geo-chemical systems. This edition of the Southern African Journal of Environmental Education contributes three research papers and a themed Think Piece collection to these international deliberations about the role of education in enabling transformations to sustainability. Collectively, the articles highlight how relationality and the formation of human agency in socio-cultural and material settings in past–present–future configurations underpin all environment-oriented learning processes. The three research papers constituting the first part of this volume offer glimpses into how current unsustainable socio-cultural and material configurations might be transformed to address social inequalities and damaged people–nature relations. The Think Piece collection, introduced by Lotz-Sisitka, Læssøe and Jørgensen later in this editorial, focuses on how learning can foster and contribute to the development of change agents and collective agency for climate-resilient development.
- Full Text:
- Date Issued: 2018
Understanding Collective Learning and Human Agency in Diverse Social, Cultural and Material Settings
- Authors: Olvitt, Lausanne L , Lotz-Sisitka, Heila , Læssøe, Jeppe , Jordt Jørgensen, Nanna
- Date: 2018
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/127226 , vital:35979 , https://www.ajol.info/index.php/sajee/article/view/172221/161620
- Description: The significance of environment and sustainability education research and practice, and its potential contribution to a sustainable future for humanity, is conveyed by the International Social Science Council (n.d.), which explains: People everywhere will need to learn how to create new forms of human activity and new social systems that are more sustainable and socially just. However, we have limited knowledge about the type of learning that creates such change, how such learning emerges, or how it can be scaled-up to create transformations at many levels.Here, the important shift is towards considering what social systems, forms of knowledge, learning processes and questions of justice are associated with perpetuating or halting the decline of Earth’s bio-geo-chemical systems. This edition of the Southern African Journal of Environmental Education contributes three research papers and a themed Think Piece collection to these international deliberations about the role of education in enabling transformations to sustainability. Collectively, the articles highlight how relationality and the formation of human agency in socio-cultural and material settings in past–present–future configurations underpin all environment-oriented learning processes. The three research papers constituting the first part of this volume offer glimpses into how current unsustainable socio-cultural and material configurations might be transformed to address social inequalities and damaged people–nature relations. The Think Piece collection, introduced by Lotz-Sisitka, Læssøe and Jørgensen later in this editorial, focuses on how learning can foster and contribute to the development of change agents and collective agency for climate-resilient development.
- Full Text:
- Date Issued: 2018
Understanding factors that influence the acceptance of electronic medical records by nurses in hospitals: a framework
- Authors: Makalima, Melissa
- Date: 2018
- Subjects: Electronic records -- Management , Information storage and retrieval systems -- Management Medical records -- South Africa Medical records -- Data processing
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/31488 , vital:31495
- Description: Globally, unlike in the past, it is rare for a patient to consult the same healthcare provider throughout his or her lifetime. However, this makes it difficult to maintain informational continuity of care. Researchers have confirmed that paper-based methods of record keeping do not meet the needs of informational continuity of care. As a result, the popularity of electronic means of recordkeeping, specifically, electronic medical records (EMRs), is growing. However, the implementation of EMRs in hospitals is not without challenges with these challenges playing a significant role in the failure of EMRs. One such challenge is a lack of user acceptance. Research reveals that nurses comprise the largest user group of EMRs in the hospital setting. However, there is inadequate literature that focuses on the factors contributing to EMR acceptance with nurses as the user group. Hence, the main problem addressed in this research study relates to the inadequate understanding of the factors that influence the acceptance of EMRs by nurses. In order to address this problem, a literature review and a case study were conducted to ascertain and investigate the factors that influence the acceptance of EMRs by nurses. A total of 39 factors were formulated. Subsequent to the formulation of these factors, knowledge on the impact of each factor on EMR acceptance was collected. Socio-technical Systems Theory (STS) was used as a theoretical lens through which to view the resulting factors. The STS dimension from which each factor originates as well as the STS dimension influenced by the factor were identified. The analysis of the different stages of acceptance as well as the STS analysis resulted in a framework that could play an important role in providing a better understanding of EMR acceptance by nurses in hospitals. It was anticipated that this study would contribute to a better understanding of the factors that hospitals should address in order to create a conducive environment for EMR acceptance by nurses within the hospitals.
- Full Text:
- Date Issued: 2018
- Authors: Makalima, Melissa
- Date: 2018
- Subjects: Electronic records -- Management , Information storage and retrieval systems -- Management Medical records -- South Africa Medical records -- Data processing
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/31488 , vital:31495
- Description: Globally, unlike in the past, it is rare for a patient to consult the same healthcare provider throughout his or her lifetime. However, this makes it difficult to maintain informational continuity of care. Researchers have confirmed that paper-based methods of record keeping do not meet the needs of informational continuity of care. As a result, the popularity of electronic means of recordkeeping, specifically, electronic medical records (EMRs), is growing. However, the implementation of EMRs in hospitals is not without challenges with these challenges playing a significant role in the failure of EMRs. One such challenge is a lack of user acceptance. Research reveals that nurses comprise the largest user group of EMRs in the hospital setting. However, there is inadequate literature that focuses on the factors contributing to EMR acceptance with nurses as the user group. Hence, the main problem addressed in this research study relates to the inadequate understanding of the factors that influence the acceptance of EMRs by nurses. In order to address this problem, a literature review and a case study were conducted to ascertain and investigate the factors that influence the acceptance of EMRs by nurses. A total of 39 factors were formulated. Subsequent to the formulation of these factors, knowledge on the impact of each factor on EMR acceptance was collected. Socio-technical Systems Theory (STS) was used as a theoretical lens through which to view the resulting factors. The STS dimension from which each factor originates as well as the STS dimension influenced by the factor were identified. The analysis of the different stages of acceptance as well as the STS analysis resulted in a framework that could play an important role in providing a better understanding of EMR acceptance by nurses in hospitals. It was anticipated that this study would contribute to a better understanding of the factors that hospitals should address in order to create a conducive environment for EMR acceptance by nurses within the hospitals.
- Full Text:
- Date Issued: 2018
Understanding ongoing support for the African National Congress amongst the urban poor in national elections in South Africa: the case of Mlungisi, Queenstown
- Authors: Makwetu, Ncebakazi
- Date: 2018
- Subjects: African National Congress , Urban poor -- South Africa -- Queenstown , Elections -- South Africa , Political campaigns -- South Africa , Political capital -- South Africa -- Queenstown , Political psychology -- South Africa -- Queenstown , Postcolonialism -- South Africa , Allegiance -- South Africa -- Queenstown
- Language: English
- Type: text , Thesis , Masters , MSocSc
- Identifier: http://hdl.handle.net/10962/62582 , vital:28209
- Description: The main objective of the thesis is to understand the ongoing support for the African National Congress (ANC) amongst the urban poor in national elections in South Africa with specific reference to Queenstown. The study involved 50 residents in Mlungisi in Queenstown, the vast majority of whom are shack dwellers. The use of semi-structured interviews allowed for an indepth understanding of why people vote for the ANC. The research participants have always voted for the ANC and have no intentions of voting for any other political party. Since 1994, the ANC has in the main pursued a neo-liberal project with a limited focus on redistribution. Because of this, most blacks living in urban areas continue to live under conditions of extreme poverty. The abject material conditions of people living in Mlungisi does not provide a strong basis for why they would vote almost unreservedly for the ANC. In seeking to offer an explanation, the thesis turns to theories of the post-colony, including the work of Frantz Fanon and Partha Chatterjee, as these theories provide an analysis of the character of the post-colonial state and the ways in which the government engages with its citizens. These macro-level theories are complemented by middle-level theories about voting and voting patterns in seeking to understand why Mlungisi residents vote for the ANC, raising questions of identity, loyalty and clientelism in the process.
- Full Text:
- Date Issued: 2018
- Authors: Makwetu, Ncebakazi
- Date: 2018
- Subjects: African National Congress , Urban poor -- South Africa -- Queenstown , Elections -- South Africa , Political campaigns -- South Africa , Political capital -- South Africa -- Queenstown , Political psychology -- South Africa -- Queenstown , Postcolonialism -- South Africa , Allegiance -- South Africa -- Queenstown
- Language: English
- Type: text , Thesis , Masters , MSocSc
- Identifier: http://hdl.handle.net/10962/62582 , vital:28209
- Description: The main objective of the thesis is to understand the ongoing support for the African National Congress (ANC) amongst the urban poor in national elections in South Africa with specific reference to Queenstown. The study involved 50 residents in Mlungisi in Queenstown, the vast majority of whom are shack dwellers. The use of semi-structured interviews allowed for an indepth understanding of why people vote for the ANC. The research participants have always voted for the ANC and have no intentions of voting for any other political party. Since 1994, the ANC has in the main pursued a neo-liberal project with a limited focus on redistribution. Because of this, most blacks living in urban areas continue to live under conditions of extreme poverty. The abject material conditions of people living in Mlungisi does not provide a strong basis for why they would vote almost unreservedly for the ANC. In seeking to offer an explanation, the thesis turns to theories of the post-colony, including the work of Frantz Fanon and Partha Chatterjee, as these theories provide an analysis of the character of the post-colonial state and the ways in which the government engages with its citizens. These macro-level theories are complemented by middle-level theories about voting and voting patterns in seeking to understand why Mlungisi residents vote for the ANC, raising questions of identity, loyalty and clientelism in the process.
- Full Text:
- Date Issued: 2018
Understanding the contribution of third space theory in the Masikhulisane reading programme
- Authors: Janse van Rensburg, Monique
- Date: 2018
- Subjects: Literacy programs -- South Africa , Literacy -- Social aspects -- South Africa , Language arts -- South Africa , Reading promotion
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: http://hdl.handle.net/10948/18652 , vital:28699
- Description: The focus of this study is to understand the contribution third space theory makes to literacy practices in the Masikhulisane Reading Programme. The Masikhulisane Reading Programme is an in-school reading club involving reading stories for enjoyment. This study concentrated on the Grade Six participants in term three of the programme, where cross-age reading receives emphasis in service of cultivating reading for pleasure. An older (or more experienced) learner was paired with a younger (less competent) learner for the purpose of nurturing quality reading competencies and reading for enjoyment. The challenges of bilingual reading and developing reading practices without sufficient resources informed this study. The Masikhulisane Reading Programme seems to provide a solution to some of these challenges, offering reading material to learners and affording them agency in terms of their buddy system. Multiple data generation methods were used in order to gain a real understanding of what the Masikhulisane Reading Programme meant to the Grade Six learners, namely: observation of classroom practice, drawings with written and verbal descriptions, and two teacher interviews. The teachers corroborated what the learners said, supporting the idea that learners benefit from an abundance of opportunities to read, while taking ownership in their paired reading. The framework designed for data analysis provided a type of coding, and a way of recognising themes. The designed framework provided an overview and was applied to all the data as a means of drawing out patters to provide explanatory potential. One way to understanding this programme is through the, Third Space Theory, which recognises that in different spaces, participants can take up different positions, allowing for different ways of being. Each Grade Six learners became the teachers with one buddy, teaching and establishing a reading practice with their younger buddy. This gave them the chance to be responsible for developing a love for reading, which was empowering for both them and their buddy.
- Full Text:
- Date Issued: 2018
- Authors: Janse van Rensburg, Monique
- Date: 2018
- Subjects: Literacy programs -- South Africa , Literacy -- Social aspects -- South Africa , Language arts -- South Africa , Reading promotion
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: http://hdl.handle.net/10948/18652 , vital:28699
- Description: The focus of this study is to understand the contribution third space theory makes to literacy practices in the Masikhulisane Reading Programme. The Masikhulisane Reading Programme is an in-school reading club involving reading stories for enjoyment. This study concentrated on the Grade Six participants in term three of the programme, where cross-age reading receives emphasis in service of cultivating reading for pleasure. An older (or more experienced) learner was paired with a younger (less competent) learner for the purpose of nurturing quality reading competencies and reading for enjoyment. The challenges of bilingual reading and developing reading practices without sufficient resources informed this study. The Masikhulisane Reading Programme seems to provide a solution to some of these challenges, offering reading material to learners and affording them agency in terms of their buddy system. Multiple data generation methods were used in order to gain a real understanding of what the Masikhulisane Reading Programme meant to the Grade Six learners, namely: observation of classroom practice, drawings with written and verbal descriptions, and two teacher interviews. The teachers corroborated what the learners said, supporting the idea that learners benefit from an abundance of opportunities to read, while taking ownership in their paired reading. The framework designed for data analysis provided a type of coding, and a way of recognising themes. The designed framework provided an overview and was applied to all the data as a means of drawing out patters to provide explanatory potential. One way to understanding this programme is through the, Third Space Theory, which recognises that in different spaces, participants can take up different positions, allowing for different ways of being. Each Grade Six learners became the teachers with one buddy, teaching and establishing a reading practice with their younger buddy. This gave them the chance to be responsible for developing a love for reading, which was empowering for both them and their buddy.
- Full Text:
- Date Issued: 2018
Understanding the extension capacity needs of the CapeNature Stewardship Programme in the Western Cape Province of South Africa
- Coetzee, Johannes Christiaan
- Authors: Coetzee, Johannes Christiaan
- Date: 2018
- Subjects: Conservation projects (Natural resources) , Psychometrics , Adaptive natural resource management , Biodiversity conservation , CapeNature Stewardship Programme
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/63220 , vital:28383
- Description: There is an increasing call for conservation programmes to provide sound evidence of effectiveness, and employing empirical evaluations can assist in the transition to evidence-based conservation practices. The objectives of this research were to develop a logic model for the CapeNature Stewardship Programme which would articulate the programme's theory of operation with respect to its Stewardship Programme landholders. The second major objective was to develop psychometric instruments for assessing the motivations and satisfactions of the programme's stewardship landholders. Both objectives included the aim to provide robust and repeatable instruments for exploring landholder's psychology, and developing a programme's theory of operation to understand the programme and improve with understanding the needs of the landowners. In this regard the processes and methodologies employed represent a major component of this research. A mixed methods approach was utilized, including stakeholder and volunteer surveys, conducted via mailing hardcopies and the internet, together with three focus groups held with the programme's management, extension staff and the stewardship landholders. Analysis of the data thus collected included both qualitative and quantitative approaches, specifically coding and content analysis, together with statistical tests of internal consistency, factor analysis and doubling correspondence analysis. Robust indices for example validity and internal consistency were developed for assessing landholder’s satisfaction with extension and level of satisfaction with the stewardship programme (Babbie 2007). These indices revealed that landholders in the Stewardship Programme are not satisfied with the programme, and exhibit behaviours suggesting they act as advocates for the programme. Demographic data and additional information provided further insights into the programme. The development of a method for articulating the programme's theory of operation is represented, together with four logic models which graphically illustrate this theory. This process and theory allowed for recommendations to be provided for the programme's improvement. A platform for adaptive management and further evaluations of this, and similar programmes, represents a major outcome of this research, understanding the extension capacity needs for the conservation of biodiversity in the CapeNature Stewardship Programme to function as a model for improving the implementation of the programme across the Western Cape, South Africa. This research feeds into an evaluation of CapeNature’s Biodiveristy Stewardship programme and demonstrates the importance of incorporating psychology into conservation interventions.
- Full Text:
- Date Issued: 2018
- Authors: Coetzee, Johannes Christiaan
- Date: 2018
- Subjects: Conservation projects (Natural resources) , Psychometrics , Adaptive natural resource management , Biodiversity conservation , CapeNature Stewardship Programme
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/63220 , vital:28383
- Description: There is an increasing call for conservation programmes to provide sound evidence of effectiveness, and employing empirical evaluations can assist in the transition to evidence-based conservation practices. The objectives of this research were to develop a logic model for the CapeNature Stewardship Programme which would articulate the programme's theory of operation with respect to its Stewardship Programme landholders. The second major objective was to develop psychometric instruments for assessing the motivations and satisfactions of the programme's stewardship landholders. Both objectives included the aim to provide robust and repeatable instruments for exploring landholder's psychology, and developing a programme's theory of operation to understand the programme and improve with understanding the needs of the landowners. In this regard the processes and methodologies employed represent a major component of this research. A mixed methods approach was utilized, including stakeholder and volunteer surveys, conducted via mailing hardcopies and the internet, together with three focus groups held with the programme's management, extension staff and the stewardship landholders. Analysis of the data thus collected included both qualitative and quantitative approaches, specifically coding and content analysis, together with statistical tests of internal consistency, factor analysis and doubling correspondence analysis. Robust indices for example validity and internal consistency were developed for assessing landholder’s satisfaction with extension and level of satisfaction with the stewardship programme (Babbie 2007). These indices revealed that landholders in the Stewardship Programme are not satisfied with the programme, and exhibit behaviours suggesting they act as advocates for the programme. Demographic data and additional information provided further insights into the programme. The development of a method for articulating the programme's theory of operation is represented, together with four logic models which graphically illustrate this theory. This process and theory allowed for recommendations to be provided for the programme's improvement. A platform for adaptive management and further evaluations of this, and similar programmes, represents a major outcome of this research, understanding the extension capacity needs for the conservation of biodiversity in the CapeNature Stewardship Programme to function as a model for improving the implementation of the programme across the Western Cape, South Africa. This research feeds into an evaluation of CapeNature’s Biodiveristy Stewardship programme and demonstrates the importance of incorporating psychology into conservation interventions.
- Full Text:
- Date Issued: 2018
Understanding the impacts of foliar insect pests on eucalyptus species growth and the development of appropriate management strategies
- Dlamini, Lindokuhle Sithembiso
- Authors: Dlamini, Lindokuhle Sithembiso
- Date: 2018
- Subjects: Eucalyptus -- South Africa , Trees -- Breeding Wood-pulp industry -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10948/29962 , vital:30801
- Description: Within South Africa (SA), eucalypts contribute significantly to the commercial production of pulpwood, treated poles, wood chips and saw timber. Due to their rapid growth and desirable timber properties, 47% of the afforested area within SA is planted with various eucalypts and their hybrid combinations. Biotic and abiotic factors pose a risk to the productivity of eucalypts, with the most significant risk currently associated with the increased impacts of foliar insect pests on tree productivity, for example Leptocybe invasa Fisher & La Salle (Hymenoptera: Eulophidae); Gonipterus scutellatus Gyllenhal (Coleoptera; Curculionidae); Thaumastocoris peregrinus Carpintero and Dellape (Hemiptera: Thaumastocoridae); Glycaspis brimblecombei Moore (Hemiptera: Psyllidae) etc. Past and current research has focused more on the individual components of biological, cultural and chemical control, with limited research conducted on the practical integration of these management strategies. Although the combination of biological and cultural control methods for long-term management would be preferred, the use of environmentally acceptable insecticides can contribute to the short-term management of insect pests where necessary. Environmental constraints (associated with forest certification) around the use of insecticides, means that there are currently few insecticides available for controlling foliar insect pests of eucalypts within the SA forest industry. Due to the recent increased introduction of insect pests, there is also a lack of data related to their impacts on tree growth, as well as the success of any management methods used. To improve our understanding regarding these components, three groups of trials (five in total) were implemented in the summer rainfall region of SA to quantify the impacts of insect pests on eucalypt growth, test integrated management practices (chemical and cultural management), and test environmentally acceptable insecticides. In 2010, two insect exclusion trials were established at Palm Ridge and Teza plantations in KwaZulu-Natal to quantify the impact of insect pests on two Eucalyptus hybrids. The trial locations were selected adjacent to compartments for which the pests Gonipterus spp. and Thaumastocoris peregrinus were present. Each trial had an insecticide treatment with an active ingredient of alpha-cypermethrin at a rate of 100 g l-1 and a control treatment where trees were not sprayed. Insect pests were collected after every spraying event. A greater number of insect pests were collected from the Palm Ridge site. Gonipterus spp. were the predominant insect pests collected. No significant growth differences were recorded between treated and untreated trees at Teza. Measurements taken at Palm Ridge indicated that insecticide-treated trees had significantly greater tree growth than untreated trees. Final measurements showed a v 25% reduction in volume for the control treatment compared to the insecticide treatment. Results of this study indicate that timing and duration of insecticide application could hold larger and additive benefits for insect exclusion. Due to the lack of non-hazardous registered insecticides, and the susceptibility of many of the eucalypts grown within SA to L. invasa, a trial was initiated in 2011 in Zululand (KwaZulu-Natal). A 3 x 4 x 4 factorial combination of 48 treatments were replicated 3 trials and arranged in a split-split-plot design. The factors included insecticide type as the whole plot (fenvalerate, azadirachtin and imidacloprid), timing of insecticide application as a sub-plot (0, 3, 6 and 9 months) and type of hybrid as the sub-sub-plot (a susceptible and tolerant E. grandis x E. camaldulensis hybrid (GC_s and GC_t) and a susceptible and tolerant E. grandis x E. urophylla hybrid (GU_s and GU_t)). To determine insecticide efficacy, plots of untreated clones were included as control treatments within each replicate. The incidence and magnitude of L. invasa damage and tree performance were assessed for up to 5.5 years of age. L. invasa damage recorded over the trial period indicated that irrespective of treatment, damage was lower in the GU clones than the GC clones resulting in a 63.9 m3 ha-1 volume difference at 5.5 years. In addition, the difference between the GU_s and GU_t clones (3.2 m3 ha-1) was marginal when compared to the GC_s and GC_t clones (37.2 m3 ha-1). A decrease in GC stocking correlated with the period when there was a high damage incidence recorded for L. invasa. Although the three insecticides tested delayed the onset of L. invasa damage, they did not result in improved tree performance at 5.5 years. Results indicate that the planting of a tolerant species (hybrid in this trial) was the most viable option for the management of L. invasa. Two trials were implemented in the KwaZulu-Natal Midlands in October 2016 (at Ingwe and Balgowan plantations), to test the efficacy of eight different insecticides (synthetic and organic) for the management of foliar insect pests. The Ingwe trial was planted with Eucalyptus dunnii and the Balgowan trial was planted with Eucalyptus badjensis. The insecticides tested were azadirachtin, deltamethrin, imidacloprid (liquid and tablet), Beauveria bassiana, Bacillus thuringiensis, potassium silicate and a combination of plant oil extracts (garlic oil, soybean oil and capsicum oleoresin extract). The imidacloprid tablet, deltamethrin and an untreated control were implemented as additional treatments. The insecticides were tested at the recommended rate (single rate) and at double the recommended rate (double rate), except for the insecticides in the additional treatments which were only tested at the single rate. These insecticides were applied three times over a period of four months, and tree growth measurements (Gld/Dbh and Ht) were taken four times over a period of seven months. Gonipterus spp. vi was the only insect pest found in both these trials, thus the insecticides were tested for their efficacy in managing this specific insect pest. A higher population and damage of Gonipterus spp. was found in the E. dunnii trial and very little to no damage was observed in the E. badjensis trial. All insecticides tested were not effective in managing Gonipterus spp. in these specific sites. A low population of insect pests and incorrect timing and method of application of some of the insecticides could offer a plausible explanation of results. Results from these trials indicate that where foliar insect pests occur in high abundance, significant tree-growth reduction occurs. Although insecticides (deltamethrin - for G. scutellatus; imidacloprid for L. invasa) can be used for the short-term control of these insects, their commercial benefits may be reduced due to the number of repeat applications required and/or with high levels of infestation. Of the eight environmentally acceptable insecticides tested for foliar insect control, the low abundance of insect pests present in the trials meant that their efficacy could not be quantified. If an alternative insecticide were to be found, its application would need to be linked to the environmentally stimulated outbreaks of specific insects. Of the treatments implemented, the selection and planting of eucalypts with known resistance to specific insect pests currently remains the most viable management strategy. Breeding for increased tolerance within resistant eucalypts may also provide additional benefits. Although the above research showed the negative impacts of foliar insect pests on tree growth, it also indicated that no single control method is viable for all insect pests. Future research should look at the integration of different management methods while incorporating more insect pests and different seasons in the study.
- Full Text:
- Date Issued: 2018
- Authors: Dlamini, Lindokuhle Sithembiso
- Date: 2018
- Subjects: Eucalyptus -- South Africa , Trees -- Breeding Wood-pulp industry -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10948/29962 , vital:30801
- Description: Within South Africa (SA), eucalypts contribute significantly to the commercial production of pulpwood, treated poles, wood chips and saw timber. Due to their rapid growth and desirable timber properties, 47% of the afforested area within SA is planted with various eucalypts and their hybrid combinations. Biotic and abiotic factors pose a risk to the productivity of eucalypts, with the most significant risk currently associated with the increased impacts of foliar insect pests on tree productivity, for example Leptocybe invasa Fisher & La Salle (Hymenoptera: Eulophidae); Gonipterus scutellatus Gyllenhal (Coleoptera; Curculionidae); Thaumastocoris peregrinus Carpintero and Dellape (Hemiptera: Thaumastocoridae); Glycaspis brimblecombei Moore (Hemiptera: Psyllidae) etc. Past and current research has focused more on the individual components of biological, cultural and chemical control, with limited research conducted on the practical integration of these management strategies. Although the combination of biological and cultural control methods for long-term management would be preferred, the use of environmentally acceptable insecticides can contribute to the short-term management of insect pests where necessary. Environmental constraints (associated with forest certification) around the use of insecticides, means that there are currently few insecticides available for controlling foliar insect pests of eucalypts within the SA forest industry. Due to the recent increased introduction of insect pests, there is also a lack of data related to their impacts on tree growth, as well as the success of any management methods used. To improve our understanding regarding these components, three groups of trials (five in total) were implemented in the summer rainfall region of SA to quantify the impacts of insect pests on eucalypt growth, test integrated management practices (chemical and cultural management), and test environmentally acceptable insecticides. In 2010, two insect exclusion trials were established at Palm Ridge and Teza plantations in KwaZulu-Natal to quantify the impact of insect pests on two Eucalyptus hybrids. The trial locations were selected adjacent to compartments for which the pests Gonipterus spp. and Thaumastocoris peregrinus were present. Each trial had an insecticide treatment with an active ingredient of alpha-cypermethrin at a rate of 100 g l-1 and a control treatment where trees were not sprayed. Insect pests were collected after every spraying event. A greater number of insect pests were collected from the Palm Ridge site. Gonipterus spp. were the predominant insect pests collected. No significant growth differences were recorded between treated and untreated trees at Teza. Measurements taken at Palm Ridge indicated that insecticide-treated trees had significantly greater tree growth than untreated trees. Final measurements showed a v 25% reduction in volume for the control treatment compared to the insecticide treatment. Results of this study indicate that timing and duration of insecticide application could hold larger and additive benefits for insect exclusion. Due to the lack of non-hazardous registered insecticides, and the susceptibility of many of the eucalypts grown within SA to L. invasa, a trial was initiated in 2011 in Zululand (KwaZulu-Natal). A 3 x 4 x 4 factorial combination of 48 treatments were replicated 3 trials and arranged in a split-split-plot design. The factors included insecticide type as the whole plot (fenvalerate, azadirachtin and imidacloprid), timing of insecticide application as a sub-plot (0, 3, 6 and 9 months) and type of hybrid as the sub-sub-plot (a susceptible and tolerant E. grandis x E. camaldulensis hybrid (GC_s and GC_t) and a susceptible and tolerant E. grandis x E. urophylla hybrid (GU_s and GU_t)). To determine insecticide efficacy, plots of untreated clones were included as control treatments within each replicate. The incidence and magnitude of L. invasa damage and tree performance were assessed for up to 5.5 years of age. L. invasa damage recorded over the trial period indicated that irrespective of treatment, damage was lower in the GU clones than the GC clones resulting in a 63.9 m3 ha-1 volume difference at 5.5 years. In addition, the difference between the GU_s and GU_t clones (3.2 m3 ha-1) was marginal when compared to the GC_s and GC_t clones (37.2 m3 ha-1). A decrease in GC stocking correlated with the period when there was a high damage incidence recorded for L. invasa. Although the three insecticides tested delayed the onset of L. invasa damage, they did not result in improved tree performance at 5.5 years. Results indicate that the planting of a tolerant species (hybrid in this trial) was the most viable option for the management of L. invasa. Two trials were implemented in the KwaZulu-Natal Midlands in October 2016 (at Ingwe and Balgowan plantations), to test the efficacy of eight different insecticides (synthetic and organic) for the management of foliar insect pests. The Ingwe trial was planted with Eucalyptus dunnii and the Balgowan trial was planted with Eucalyptus badjensis. The insecticides tested were azadirachtin, deltamethrin, imidacloprid (liquid and tablet), Beauveria bassiana, Bacillus thuringiensis, potassium silicate and a combination of plant oil extracts (garlic oil, soybean oil and capsicum oleoresin extract). The imidacloprid tablet, deltamethrin and an untreated control were implemented as additional treatments. The insecticides were tested at the recommended rate (single rate) and at double the recommended rate (double rate), except for the insecticides in the additional treatments which were only tested at the single rate. These insecticides were applied three times over a period of four months, and tree growth measurements (Gld/Dbh and Ht) were taken four times over a period of seven months. Gonipterus spp. vi was the only insect pest found in both these trials, thus the insecticides were tested for their efficacy in managing this specific insect pest. A higher population and damage of Gonipterus spp. was found in the E. dunnii trial and very little to no damage was observed in the E. badjensis trial. All insecticides tested were not effective in managing Gonipterus spp. in these specific sites. A low population of insect pests and incorrect timing and method of application of some of the insecticides could offer a plausible explanation of results. Results from these trials indicate that where foliar insect pests occur in high abundance, significant tree-growth reduction occurs. Although insecticides (deltamethrin - for G. scutellatus; imidacloprid for L. invasa) can be used for the short-term control of these insects, their commercial benefits may be reduced due to the number of repeat applications required and/or with high levels of infestation. Of the eight environmentally acceptable insecticides tested for foliar insect control, the low abundance of insect pests present in the trials meant that their efficacy could not be quantified. If an alternative insecticide were to be found, its application would need to be linked to the environmentally stimulated outbreaks of specific insects. Of the treatments implemented, the selection and planting of eucalypts with known resistance to specific insect pests currently remains the most viable management strategy. Breeding for increased tolerance within resistant eucalypts may also provide additional benefits. Although the above research showed the negative impacts of foliar insect pests on tree growth, it also indicated that no single control method is viable for all insect pests. Future research should look at the integration of different management methods while incorporating more insect pests and different seasons in the study.
- Full Text:
- Date Issued: 2018
Understanding the role of social capital in enhancing community resilience to natural disasters: a case study of Muzarabani District, Zimbabwe
- Authors: Kasimba, Rosemary
- Date: 2018
- Subjects: Social capital (Sociology) -- Zimbabwe , Natural disasters -- Zimbabwe -- Social aspects , Resilience (Personality trait) -- Zimbabwe , Food security -- Climatic factors -- Zimbabwe , Social sciences -- Network analysis , Cooperativeness -- Zimbabwe
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/60292 , vital:27763
- Description: The central focus of the study was to seek an understanding of the role that Social Capital plays in enhancing the resilience and adaptive capacity of the community to floods and droughts in Muzarabani District of Northern Zimbabwe. The study was conducted in two of the wards in Muzarabani District namely Chadereka and Kapembere. In addition, the study sought to understand the coping and adaptation strategies employed by the most vulnerable groups such as the elderly, child heads, women and single heads of households. The specific objectives of the study were: to understand the effects of floods and droughts on residents’ livelihoods and food security, examine residents’ perceptions on droughts andfloods and to document community-based strategies utilised by women, child-headed families and the elderly to improve their livelihood and food security in the face of floods and droughts, explore different types of Social Capital that exist in the study area especially with regard to household resilience to disasters, comprehend the basis of residents’ resilience to floods and droughts and the extent to which vulnerable groups rely on Social Capital when coping with these disasters and to examine the repercussions of residents’ strategies on the community’s institutional structures. The study was informed by Social Capital theory and the social network analysis. Social Capital plays a pivotal role in enhancing the resilience of the community to floods and droughts. Different types of Social Capital that exist and help people to deal with floods and droughts include linking, bonding, and bridging and victim Social Capital. Inhabitants within and outside villages support each other. Non-Governmental Organisations (NGOs) and the government are also working hand in hand with community members to reduce the negative impacts of floods and droughts. Volunteerism, generalised reciprocity and mutual understanding are also at the centre of interventions. The study employed both quantitative and qualitative approaches to achieve its objectives. Questionnaires, focus groups discussions, observations, transect walks, key informant interviews and some participatory methods were used to collect data. SPSS, content and thematic analysis were used to analyse data. The study found that floods and droughts negatively impact on human security, causing acute food shortages, intensifying poverty, spread of water related diseases, increasing divorce rates, children dropping out of school, reduced livestock and crop production, family disintegration, chaos in religion, exacerbating local unemployment as well as negatively affecting the wellbeing of community members. On a positive note, floods in Chadereka cause the deposition of alluvial soils that are good for crop production. However, in Kapembere, volunteerism is not very common; inhabitants are not yet trained about the concept. Community members have also formed cooperatives where they would give each other money or grain. In Chadereka, women have formed a mother-support-group to assist children with food in schools. Strategies being employed by the most vulnerable groups include casual labour, joining cooperatives, migration, taking children from school, hiring out cattle, selling of assets, riverine farming, growing drought-resistant crops, making use of indigenous knowledge systems, skipping meals and exploiting natural resources among others. Some women have resorted to prostitution to increase their resilience to floods and drought impacts such as poverty and acute food shortages. The elderly also hire out their cattle. They also rely on support from the government and NGOs. There are a number of challenges faced by residents in dealing with floods and droughts. Community social relationships, migration, casual labour and the sale of assets are the basis of the people’s resilience against the impacts of floods and droughts. The study identified the following issues which all stakeholders involved could take note of: the government should not always be suspicious of disaster-risk reduction strategies implemented by NGOs as this scares away some of them that are willing to offer untied or unconditional assistance; timely and impartial distribution of agricultural inputs to inhabitants would be extremely useful. Moreover, the government needs to provide resources that support local organisations (formed by the local people) to assist the most vulnerable people in communities. Community leaders, together with the government and NGOs, are encouraged to hold awareness campaign programmes that dispel tribal and ethnic stereotypes, to promote local Social Capital among members of the community. Further investigations in the following areas are critical: A more comprehensive assessment of the determinants of resilience to droughts and floods in Zimbabwe is necessary.A study on the challenges faced by the disabled people and women in polygamous marriages and how they are adapting to floods and droughts, needs to be conducted and a critical investigation on the Zimbabwean government’s strengths and weaknesses in enhancing the resilience of the community to floods and droughts is necessary among others.
- Full Text:
- Date Issued: 2018
- Authors: Kasimba, Rosemary
- Date: 2018
- Subjects: Social capital (Sociology) -- Zimbabwe , Natural disasters -- Zimbabwe -- Social aspects , Resilience (Personality trait) -- Zimbabwe , Food security -- Climatic factors -- Zimbabwe , Social sciences -- Network analysis , Cooperativeness -- Zimbabwe
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/60292 , vital:27763
- Description: The central focus of the study was to seek an understanding of the role that Social Capital plays in enhancing the resilience and adaptive capacity of the community to floods and droughts in Muzarabani District of Northern Zimbabwe. The study was conducted in two of the wards in Muzarabani District namely Chadereka and Kapembere. In addition, the study sought to understand the coping and adaptation strategies employed by the most vulnerable groups such as the elderly, child heads, women and single heads of households. The specific objectives of the study were: to understand the effects of floods and droughts on residents’ livelihoods and food security, examine residents’ perceptions on droughts andfloods and to document community-based strategies utilised by women, child-headed families and the elderly to improve their livelihood and food security in the face of floods and droughts, explore different types of Social Capital that exist in the study area especially with regard to household resilience to disasters, comprehend the basis of residents’ resilience to floods and droughts and the extent to which vulnerable groups rely on Social Capital when coping with these disasters and to examine the repercussions of residents’ strategies on the community’s institutional structures. The study was informed by Social Capital theory and the social network analysis. Social Capital plays a pivotal role in enhancing the resilience of the community to floods and droughts. Different types of Social Capital that exist and help people to deal with floods and droughts include linking, bonding, and bridging and victim Social Capital. Inhabitants within and outside villages support each other. Non-Governmental Organisations (NGOs) and the government are also working hand in hand with community members to reduce the negative impacts of floods and droughts. Volunteerism, generalised reciprocity and mutual understanding are also at the centre of interventions. The study employed both quantitative and qualitative approaches to achieve its objectives. Questionnaires, focus groups discussions, observations, transect walks, key informant interviews and some participatory methods were used to collect data. SPSS, content and thematic analysis were used to analyse data. The study found that floods and droughts negatively impact on human security, causing acute food shortages, intensifying poverty, spread of water related diseases, increasing divorce rates, children dropping out of school, reduced livestock and crop production, family disintegration, chaos in religion, exacerbating local unemployment as well as negatively affecting the wellbeing of community members. On a positive note, floods in Chadereka cause the deposition of alluvial soils that are good for crop production. However, in Kapembere, volunteerism is not very common; inhabitants are not yet trained about the concept. Community members have also formed cooperatives where they would give each other money or grain. In Chadereka, women have formed a mother-support-group to assist children with food in schools. Strategies being employed by the most vulnerable groups include casual labour, joining cooperatives, migration, taking children from school, hiring out cattle, selling of assets, riverine farming, growing drought-resistant crops, making use of indigenous knowledge systems, skipping meals and exploiting natural resources among others. Some women have resorted to prostitution to increase their resilience to floods and drought impacts such as poverty and acute food shortages. The elderly also hire out their cattle. They also rely on support from the government and NGOs. There are a number of challenges faced by residents in dealing with floods and droughts. Community social relationships, migration, casual labour and the sale of assets are the basis of the people’s resilience against the impacts of floods and droughts. The study identified the following issues which all stakeholders involved could take note of: the government should not always be suspicious of disaster-risk reduction strategies implemented by NGOs as this scares away some of them that are willing to offer untied or unconditional assistance; timely and impartial distribution of agricultural inputs to inhabitants would be extremely useful. Moreover, the government needs to provide resources that support local organisations (formed by the local people) to assist the most vulnerable people in communities. Community leaders, together with the government and NGOs, are encouraged to hold awareness campaign programmes that dispel tribal and ethnic stereotypes, to promote local Social Capital among members of the community. Further investigations in the following areas are critical: A more comprehensive assessment of the determinants of resilience to droughts and floods in Zimbabwe is necessary.A study on the challenges faced by the disabled people and women in polygamous marriages and how they are adapting to floods and droughts, needs to be conducted and a critical investigation on the Zimbabwean government’s strengths and weaknesses in enhancing the resilience of the community to floods and droughts is necessary among others.
- Full Text:
- Date Issued: 2018