Supply chain efficacy for reefer cargo destined for Cape Town terminal
- Authors: Tefu, Johanna
- Date: 2019
- Subjects: Business logistics -- South Africa -- Cape Town , Industrial procurement Physical distribution of goods Marine terminals -- South Africa -- Cape Town
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/43867 , vital:37066
- Description: Economical earnings for South Africa rely severely on export earnings, which are dependent on the effectiveness and efficiency of the cold chain. Achieving an efficient, integrated, effective, collaborative, focused and proficient supply chain in the exporting of reefer cargo plays a pivotal role in growing a country’s economy. The purpose of this treatise is to develop a conceptual framework that can be adopted by the cold chain industry in South Africa to achieve supply chain efficacy for reefer cargo destined for Cape Town Terminal. A quantitative approach was adopted for the collection of data, as well as an in-depth literature review was conducted, where efficacy in a supply chain was studied. Variables that were explored in the study for the attainment of supply chain efficacy include; the reliability of the cold chain, communication, innovation, agility, asset management and the level of service quality. Information that was needed for the study was collected using a questionnaire and available literature. A questionnaire was used to determine key elements that are imperative in the development of a conceptual framework to ensure the attainment of supply chain efficacy. This study explores the necessary literature on the South Africa fruit industry, the cold chain and its participants, the SCOR process model and elements that determine supply chain efficacy. The study also explored the various dimensions of an integrated supply chain. The ideal conceptual framework was developed which was used to form a basis for the formulation of the questionnaire. The study comprised of 126 respondents and various statistical methods were used to analyse the conceptual model. Hereafter, a proposed conceptual model to measure supply chain efficacy was constructed. The model includes reliability, communication, innovation, asset management, and service quality, which have been tested to be determinants of supply chain efficacy. The study concludes with managerial recommendations that participants in the cold chain can adopt to achieve efficacy. Some of the recommendations include Port Terminals implementing control measures that will ensure proper and accurate pre-advice of reefer cargo, this is to take place prior to containers arriving at the terminal gate. Port Terminals and Shipping Lines to develop a platform e.g. an application whereby timeous and informative communication will be made available to industry when the port is faced with periods of high winds or any changes in vessel schedules. The fostering of partnerships that will make possible the opportunity for exploring Lean Six Sigma principles with efforts of improving export processes. The development of a performance tracking tool that can be used by the entire cold chain, so as to ascertain where improvement areas to the process are and implement immediate change. The industry to invest in extensive market research to examine and improve on fruit export trade. Focusing on strategies such as diversifying the market, this can be done as a result of the volatility of the sector. Port Terminals to explore possibilities of increasing rail activities for reefer containers. Controlling bodies such as the PPECB to conduct industry-wide training programmes for refining the handling of reefer cargo in aims of improving trade. The industry to also establish platforms were feedback would be given pertaining to the performance of the cold chain at the end of the reefer peak season, with variable action items. This treatise looks at proposing a conceptual framework that can be adopted to achieve supply chain efficacy for reefer cargo destined for the Cape Town Terminal. This study will enable the integration of the cold chain network in the Western Cape in order to meet fruit export demand and seasonality requirements.
- Full Text:
- Date Issued: 2019
- Authors: Tefu, Johanna
- Date: 2019
- Subjects: Business logistics -- South Africa -- Cape Town , Industrial procurement Physical distribution of goods Marine terminals -- South Africa -- Cape Town
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/43867 , vital:37066
- Description: Economical earnings for South Africa rely severely on export earnings, which are dependent on the effectiveness and efficiency of the cold chain. Achieving an efficient, integrated, effective, collaborative, focused and proficient supply chain in the exporting of reefer cargo plays a pivotal role in growing a country’s economy. The purpose of this treatise is to develop a conceptual framework that can be adopted by the cold chain industry in South Africa to achieve supply chain efficacy for reefer cargo destined for Cape Town Terminal. A quantitative approach was adopted for the collection of data, as well as an in-depth literature review was conducted, where efficacy in a supply chain was studied. Variables that were explored in the study for the attainment of supply chain efficacy include; the reliability of the cold chain, communication, innovation, agility, asset management and the level of service quality. Information that was needed for the study was collected using a questionnaire and available literature. A questionnaire was used to determine key elements that are imperative in the development of a conceptual framework to ensure the attainment of supply chain efficacy. This study explores the necessary literature on the South Africa fruit industry, the cold chain and its participants, the SCOR process model and elements that determine supply chain efficacy. The study also explored the various dimensions of an integrated supply chain. The ideal conceptual framework was developed which was used to form a basis for the formulation of the questionnaire. The study comprised of 126 respondents and various statistical methods were used to analyse the conceptual model. Hereafter, a proposed conceptual model to measure supply chain efficacy was constructed. The model includes reliability, communication, innovation, asset management, and service quality, which have been tested to be determinants of supply chain efficacy. The study concludes with managerial recommendations that participants in the cold chain can adopt to achieve efficacy. Some of the recommendations include Port Terminals implementing control measures that will ensure proper and accurate pre-advice of reefer cargo, this is to take place prior to containers arriving at the terminal gate. Port Terminals and Shipping Lines to develop a platform e.g. an application whereby timeous and informative communication will be made available to industry when the port is faced with periods of high winds or any changes in vessel schedules. The fostering of partnerships that will make possible the opportunity for exploring Lean Six Sigma principles with efforts of improving export processes. The development of a performance tracking tool that can be used by the entire cold chain, so as to ascertain where improvement areas to the process are and implement immediate change. The industry to invest in extensive market research to examine and improve on fruit export trade. Focusing on strategies such as diversifying the market, this can be done as a result of the volatility of the sector. Port Terminals to explore possibilities of increasing rail activities for reefer containers. Controlling bodies such as the PPECB to conduct industry-wide training programmes for refining the handling of reefer cargo in aims of improving trade. The industry to also establish platforms were feedback would be given pertaining to the performance of the cold chain at the end of the reefer peak season, with variable action items. This treatise looks at proposing a conceptual framework that can be adopted to achieve supply chain efficacy for reefer cargo destined for the Cape Town Terminal. This study will enable the integration of the cold chain network in the Western Cape in order to meet fruit export demand and seasonality requirements.
- Full Text:
- Date Issued: 2019
An evaluation of the effectiveness of campus safety and security measures in crime prevention at the University of Fort Hare (Alice) campus
- Authors: Mdlungu, Tandiwe
- Date: 2018
- Subjects: Crime prevention Campus violence Universities and colleges -- Security measures
- Language: English
- Type: Thesis , Masters , MSoc
- Identifier: http://hdl.handle.net/10353/12557 , vital:39287
- Description: The study focused on safety and security measures employed at institutions of higher learning. The purpose of this study is to evaluate the effectiveness of safety and security measures employed by institutions of higher learning in preventing crime. The study was carried out at the University of Fort Hare. An empirical research was conducted to collect data from the students using questionnaires. The study highlighted the rate of crime on campus as well as the effectiveness of safety and security measures on campus. The general finding of this study indicate that 51 percent of the students on campus have been victims of crime. From the victims, more than 50 percent did not report the crime to authorities. Majority of crimes are property crimes. Majority of students are not aware of any safety and security policies in the campus. Findings highlighted crime prevention challenges faced by the university. Moreover, students agree that the institution needs to improve as well as upgrade its existing safety and security measure which could help prevent the high prevalence of crime on campus From the findings of the research the researcher made recommendations and drew conclusions that could be beneficial to students as well as the institutions administrators.
- Full Text:
- Date Issued: 2018
- Authors: Mdlungu, Tandiwe
- Date: 2018
- Subjects: Crime prevention Campus violence Universities and colleges -- Security measures
- Language: English
- Type: Thesis , Masters , MSoc
- Identifier: http://hdl.handle.net/10353/12557 , vital:39287
- Description: The study focused on safety and security measures employed at institutions of higher learning. The purpose of this study is to evaluate the effectiveness of safety and security measures employed by institutions of higher learning in preventing crime. The study was carried out at the University of Fort Hare. An empirical research was conducted to collect data from the students using questionnaires. The study highlighted the rate of crime on campus as well as the effectiveness of safety and security measures on campus. The general finding of this study indicate that 51 percent of the students on campus have been victims of crime. From the victims, more than 50 percent did not report the crime to authorities. Majority of crimes are property crimes. Majority of students are not aware of any safety and security policies in the campus. Findings highlighted crime prevention challenges faced by the university. Moreover, students agree that the institution needs to improve as well as upgrade its existing safety and security measure which could help prevent the high prevalence of crime on campus From the findings of the research the researcher made recommendations and drew conclusions that could be beneficial to students as well as the institutions administrators.
- Full Text:
- Date Issued: 2018
Participatory development communication and the sustainability of poverty alleviation projects in Lesotho : a case of Lifajaneng
- Authors: Ntobo-Letsie, Hlompho
- Date: 2018
- Subjects: Communication in economic development Communication in rural development Economic assistance, Domestic
- Language: English
- Type: Thesis , Masters , MSoc
- Identifier: http://hdl.handle.net/10353/10244 , vital:35384
- Description: This study aimed at assessing the impact of communication on the sustainability of poverty alleviation programmes established for selected beneficiaries in the rural community of Lifajaneng. This is conducted with the purpose of understanding how the Mafeteng community engages in the poverty alleviation projects carried out within their area of residence, so as to encourage more commitment in participation. The conceptual framework for this study is the empowerment approach and the study is informed by two theories; the participatory communication theory and the diffusion of innovation theory. The study employed the mixed method approach to gather and analyze the data; that is using questionnaires, focus group discussions and face to face interviews to solicit for information from project participants and project managers. The quantitative data was presented and analyzed through charts and graphs buttressed with themes that emerged in the qualitative data. The study revealed that the sustainability of the poverty alleviation projects remains questionable due to a number of challenges. The results reflect that communities are more comfortable when the mother language (Sesotho) is used predominantly as the medium of communication. The results also reflected that meetings had a higher attendance rate if called for by local leaders through word of mouth followed by communications done telephonically. Mainstream media such as radio and newspapers were the least effective when mobilizing the communities for meetings related to the poverty alleviation projects in the poor community. The study also unfolded the following issues; lack of full participation and commitment of the beneficiaries, inadequate funding to allow sufficient training of the beneficiaries. This is because the funds had some strings attached and the beneficiaries had their own expectations of the funds, therefore the objectives and the limits of the funder did not match the objectives and the limitations of the beneficiaries. Hence, the end results are lack of motivation for the beneficiaries.
- Full Text:
- Date Issued: 2018
- Authors: Ntobo-Letsie, Hlompho
- Date: 2018
- Subjects: Communication in economic development Communication in rural development Economic assistance, Domestic
- Language: English
- Type: Thesis , Masters , MSoc
- Identifier: http://hdl.handle.net/10353/10244 , vital:35384
- Description: This study aimed at assessing the impact of communication on the sustainability of poverty alleviation programmes established for selected beneficiaries in the rural community of Lifajaneng. This is conducted with the purpose of understanding how the Mafeteng community engages in the poverty alleviation projects carried out within their area of residence, so as to encourage more commitment in participation. The conceptual framework for this study is the empowerment approach and the study is informed by two theories; the participatory communication theory and the diffusion of innovation theory. The study employed the mixed method approach to gather and analyze the data; that is using questionnaires, focus group discussions and face to face interviews to solicit for information from project participants and project managers. The quantitative data was presented and analyzed through charts and graphs buttressed with themes that emerged in the qualitative data. The study revealed that the sustainability of the poverty alleviation projects remains questionable due to a number of challenges. The results reflect that communities are more comfortable when the mother language (Sesotho) is used predominantly as the medium of communication. The results also reflected that meetings had a higher attendance rate if called for by local leaders through word of mouth followed by communications done telephonically. Mainstream media such as radio and newspapers were the least effective when mobilizing the communities for meetings related to the poverty alleviation projects in the poor community. The study also unfolded the following issues; lack of full participation and commitment of the beneficiaries, inadequate funding to allow sufficient training of the beneficiaries. This is because the funds had some strings attached and the beneficiaries had their own expectations of the funds, therefore the objectives and the limits of the funder did not match the objectives and the limitations of the beneficiaries. Hence, the end results are lack of motivation for the beneficiaries.
- Full Text:
- Date Issued: 2018
The impact of human resource practices on employee commitment and retention among nurses in Amathole District, South Africa
- Authors: Terera, Sharon Ruvimbo
- Date: 2018
- Subjects: Employee retention--South Africa Nurses--South Africa
- Language: English
- Type: Thesis , Masters , Industrial Psychology
- Identifier: http://hdl.handle.net/10353/17727 , vital:41188
- Description: This study explored the impact of human resource practices on employee commitment and retention among nurses in Amathole District, South Africa. The objectives of this study were to determine the influence of human resources practices (HR) on nurse retention in public hospitals; investigate the influence of HR practices on organizational commitment of nurses, and retention and to make recommendations to the hospitals on possible ways to improve the organisational commitment and employee retention of nurses based on the research findings. The study utilized a quantitative research design and questionnaires were used to collect data. The sample comprised of 150 nurses and the data was analysed through descriptive and inferential statistics. Research findings revealed that the effective use of sound human resources practices reduces nurse turnover whilst nurse organisational commitment and retention improves.
- Full Text:
- Date Issued: 2018
- Authors: Terera, Sharon Ruvimbo
- Date: 2018
- Subjects: Employee retention--South Africa Nurses--South Africa
- Language: English
- Type: Thesis , Masters , Industrial Psychology
- Identifier: http://hdl.handle.net/10353/17727 , vital:41188
- Description: This study explored the impact of human resource practices on employee commitment and retention among nurses in Amathole District, South Africa. The objectives of this study were to determine the influence of human resources practices (HR) on nurse retention in public hospitals; investigate the influence of HR practices on organizational commitment of nurses, and retention and to make recommendations to the hospitals on possible ways to improve the organisational commitment and employee retention of nurses based on the research findings. The study utilized a quantitative research design and questionnaires were used to collect data. The sample comprised of 150 nurses and the data was analysed through descriptive and inferential statistics. Research findings revealed that the effective use of sound human resources practices reduces nurse turnover whilst nurse organisational commitment and retention improves.
- Full Text:
- Date Issued: 2018
An exploration of the effectiveness of social work interventions in assisting children living with HIV/AIDS : the case of Nobuhle Unit 8 Community Clinic, Mdantsane, Eastern Cape
- Authors: Mdlankomo, Andiswa Pamella
- Date: 2017
- Subjects: Social case work -- South Africa -- Eastern Cape Social work with children -- South Africa -- Eastern Cape HIV infections
- Language: English
- Type: Thesis , Masters , MSoc
- Identifier: http://hdl.handle.net/10353/8574 , vital:33137
- Description: Social work practice in South African societies is of paramount importance because of high levels of poverty and various vulnerabilities. Despite the fact that there is much research on social work and children living with HIV/AIDS in South Africa, the link between social work approaches and vulnerable children has remained silent. Therefore, it was necessary to explore the quality of service delivery and understand how effective are social work interventions towards specific vulnerable children with the aim of enhancing their wellbeing. Thus, the study explored social work interventions towards assisting children living with HIV/AIDS. The study adopted qualitative research approach method for the purposes of collecting data. In-depth interviews were used as methods of data collection to find out the effectiveness and relevancy of social work interventions towards assisting children living with HIV/AIDS. The data was thematically analysed. The main findings indicated a lack of commitment in social work practice and that mirrors a lack of adequate Continuous Professional Development Training (CPDT); Social work practice in Mdantsane is overwhelmed by statutory work; and social work practice as associated with monotonous duties or an inescapable boring work routine. Moreover, the study unearthed that social workers‟ interventions towards assisting children living with HIV/AIDS are ineffective in Mdantsane Nobuhle Unit 8 community due to service delivery constraints faced by social workers, such as lack of specific HIV/AIDS proper care work training of social workers, lack of resources, high caseloads, misconceptions, and poor implementation of governmental policies. Hence, the study recommends the need for more social workers to fill up this shortage. Thus, the study recommended that there should be an indigenous social welfare and social work practice of assisting children infected and affected by HIV/AIDs. Furthermore, the study recommended that social workers should be equipped with local based skills and knowledge so as to be able to practice professionally. The study concluded that, there should be practical interventions looking into the socio-economic and political contexts and challenging the theorization of the practice, but adopting a more pragmatic approach through influencing and lobbying the government to respondent to the children needs.
- Full Text:
- Date Issued: 2017
- Authors: Mdlankomo, Andiswa Pamella
- Date: 2017
- Subjects: Social case work -- South Africa -- Eastern Cape Social work with children -- South Africa -- Eastern Cape HIV infections
- Language: English
- Type: Thesis , Masters , MSoc
- Identifier: http://hdl.handle.net/10353/8574 , vital:33137
- Description: Social work practice in South African societies is of paramount importance because of high levels of poverty and various vulnerabilities. Despite the fact that there is much research on social work and children living with HIV/AIDS in South Africa, the link between social work approaches and vulnerable children has remained silent. Therefore, it was necessary to explore the quality of service delivery and understand how effective are social work interventions towards specific vulnerable children with the aim of enhancing their wellbeing. Thus, the study explored social work interventions towards assisting children living with HIV/AIDS. The study adopted qualitative research approach method for the purposes of collecting data. In-depth interviews were used as methods of data collection to find out the effectiveness and relevancy of social work interventions towards assisting children living with HIV/AIDS. The data was thematically analysed. The main findings indicated a lack of commitment in social work practice and that mirrors a lack of adequate Continuous Professional Development Training (CPDT); Social work practice in Mdantsane is overwhelmed by statutory work; and social work practice as associated with monotonous duties or an inescapable boring work routine. Moreover, the study unearthed that social workers‟ interventions towards assisting children living with HIV/AIDS are ineffective in Mdantsane Nobuhle Unit 8 community due to service delivery constraints faced by social workers, such as lack of specific HIV/AIDS proper care work training of social workers, lack of resources, high caseloads, misconceptions, and poor implementation of governmental policies. Hence, the study recommends the need for more social workers to fill up this shortage. Thus, the study recommended that there should be an indigenous social welfare and social work practice of assisting children infected and affected by HIV/AIDs. Furthermore, the study recommended that social workers should be equipped with local based skills and knowledge so as to be able to practice professionally. The study concluded that, there should be practical interventions looking into the socio-economic and political contexts and challenging the theorization of the practice, but adopting a more pragmatic approach through influencing and lobbying the government to respondent to the children needs.
- Full Text:
- Date Issued: 2017
Community attitudes on differences between therapeutic interventions offered by traditional healers and biomedics in combatting HIV/AIDS. The case of Dimbaza township
- Authors: Duda, Bathandwa Zimkhitha
- Date: 2017
- Subjects: Healers -- South Africa -- Eastern Cape Traditional medicine -- South Africa -- Eastern Cape AIDS (Disease)-- Treatment -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSoc
- Identifier: http://hdl.handle.net/10353/12788 , vital:39361
- Description: The researcher attempted to investigate and assess the attitudes about therapeutic interventions of traditional healers and bio medics which throw PLWHA into confusion in regards to their health. People living with the virus tend to use both therapies in tandem, yet the rate of HIV/AIDS is escalating in South Africa. This study sought to explore the community attitudes about traditional healing and bio- medics in treating HIV/AIDS. The study used a qualitative approach with explorative and descriptive in designs and a case study as the specific research design. It was also guided by a qualitative research paradigm. For data collection, the study employed in-depth interviews, focus groups and document analysis. The study used non-probability methodology of sample selection, but specifically, snow ball sampling was used to reach to twenty (20) participants; who comprised 6 community members, 6 people living with HIV/AIDS, 4 nurses and 4 traditional healers. Data was analysed qualitatively through content thematic analysis. The study came up with the following findings: lack of faith in traditional healers and their therapies; traditional healers put the PLWHA’s health at stake; cultural beliefs and faith systems’ conformity prompts PLWHA to use healer’s concoctions; ARVs passes the litmus test as a perfect medication in treating PLWHA; ARVs administration fosters good behaviour change; the side effects of the use of ARVs usher in an opportunity to spread the disease; health care workers are source of inspiration in combating stigma; traditional healers’ therapeutic modalities are dangerous to the health of the PLWHA; traditional healers hoodwink societies that HIV/AIDS is a spiritual disease and use of traditional medication in treatment of various ailments supported. The study recommended the following; Scientific researchers need to shed more light on the concurrent use of traditional and bio-medical therapy in managing HIV; World Health Organization need to develop campaigns on the use of African and Western therapies in treating HIV/AIDS; Ongoing training of traditional healers regarding health care practise need to be enforced; Promote cultural methods as a vehicle for prevention strategies to prevent and manage HIV/AIDS and referral of clients to the hospital by traditional healers. Recommendations for social workers; Community based campaigns in managing and preventing the spread of HIV/AIDS and Empower, educate and monitor traditional healers.
- Full Text:
- Date Issued: 2017
- Authors: Duda, Bathandwa Zimkhitha
- Date: 2017
- Subjects: Healers -- South Africa -- Eastern Cape Traditional medicine -- South Africa -- Eastern Cape AIDS (Disease)-- Treatment -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSoc
- Identifier: http://hdl.handle.net/10353/12788 , vital:39361
- Description: The researcher attempted to investigate and assess the attitudes about therapeutic interventions of traditional healers and bio medics which throw PLWHA into confusion in regards to their health. People living with the virus tend to use both therapies in tandem, yet the rate of HIV/AIDS is escalating in South Africa. This study sought to explore the community attitudes about traditional healing and bio- medics in treating HIV/AIDS. The study used a qualitative approach with explorative and descriptive in designs and a case study as the specific research design. It was also guided by a qualitative research paradigm. For data collection, the study employed in-depth interviews, focus groups and document analysis. The study used non-probability methodology of sample selection, but specifically, snow ball sampling was used to reach to twenty (20) participants; who comprised 6 community members, 6 people living with HIV/AIDS, 4 nurses and 4 traditional healers. Data was analysed qualitatively through content thematic analysis. The study came up with the following findings: lack of faith in traditional healers and their therapies; traditional healers put the PLWHA’s health at stake; cultural beliefs and faith systems’ conformity prompts PLWHA to use healer’s concoctions; ARVs passes the litmus test as a perfect medication in treating PLWHA; ARVs administration fosters good behaviour change; the side effects of the use of ARVs usher in an opportunity to spread the disease; health care workers are source of inspiration in combating stigma; traditional healers’ therapeutic modalities are dangerous to the health of the PLWHA; traditional healers hoodwink societies that HIV/AIDS is a spiritual disease and use of traditional medication in treatment of various ailments supported. The study recommended the following; Scientific researchers need to shed more light on the concurrent use of traditional and bio-medical therapy in managing HIV; World Health Organization need to develop campaigns on the use of African and Western therapies in treating HIV/AIDS; Ongoing training of traditional healers regarding health care practise need to be enforced; Promote cultural methods as a vehicle for prevention strategies to prevent and manage HIV/AIDS and referral of clients to the hospital by traditional healers. Recommendations for social workers; Community based campaigns in managing and preventing the spread of HIV/AIDS and Empower, educate and monitor traditional healers.
- Full Text:
- Date Issued: 2017
Evaluating the effects of foster care placement on childhood development : a study of Berlin location, Buffalo City municipality
- Authors: Mbonda, Mamela
- Date: 2017
- Subjects: Foster home care Orphans Child development
- Language: English
- Type: Thesis , Masters , MSoc
- Identifier: http://hdl.handle.net/10353/15343 , vital:40399
- Description: The number of orphaned and vulnerable children in South Africa is drastically increasing which leads to most children being put in a foster care system. Yet there are great lacunae within its implementation; facilitation and monitoring which effectively affect the children involved. This evoked interest to the researcher on evaluating the effects of foster placement on childhood development; a study of Berlin Location, Buffalo City Municipality. The study intended to fulfil the following objectives: 1. To document environments that challenges foster care placement as an intervention of child placement; 2. To understand the negative impacts of foster care on a child’s psychosocial development; 3. To explore the impact of host parent’s culture to the child’s adaptation; 4. To establish the strengths and weaknesses of the South African child protection system. The study utilized qualitative paradigms guided by the qualitative research approach by adopting a case study cum phenomenological design. It employed in-depth interviews, focus groups, key informants as data collection methods. The study used both non-probability and probability sampling methods of which purposive and simple random sampling technique was utilised. The population of study was made up of twenty (20) participants who were incorporated of five (5) foster parents, five (5) key informants and ten (10) foster children. The data was analysed qualitatively through content thematic analysis. The study revealed the following findings: (i) challenges pertaining to adjustment to home milieu, (ii) lack of knowledge on foster parents’ rights and responsibilities, (iii) inadequateness of foster grant, (iv) cultural deviance, (v) prevalence of drug use and teenage pregnancy, (vi) dire lack of awareness raising sessions for the foster parents and their children, (vii) identity crisis disposition displayed by foster children, (viii) lack of individualizing cases of foster care placement by the social workers, (ix) efficiency of alternative care in comparison to residential care, (x) internalization of emotions by foster children, (xi) continued void for the biological mother’s love and affection,(xii) paucity of monitoring services to children, (xiii) information sharing and capacity building workshops for social workers a prerequisite, (xiv) Effectiveness of authoritative parenting a successful method and difficulty with telling foster children about their background. The study findings made the following recommendations: Strengthening inter-sectoral relationships and capacitate different stakeholders; Emphasis on early intervention and preventative programmes; Enforcement of punishment measure for incompliance; Implementation of training for foster parents and children; Foster care process made a specialization for social workers, Government to invest on psychosocial support and capacitating workshops for social workers. The researcher, therefore, hopes to have fulfilled the study objectives and further explored all the requirements of the study during data collection. More-so, fulfilment of objectives will assist the government and relevant stakeholders in bridging the gaps that exist with child protection.
- Full Text:
- Date Issued: 2017
- Authors: Mbonda, Mamela
- Date: 2017
- Subjects: Foster home care Orphans Child development
- Language: English
- Type: Thesis , Masters , MSoc
- Identifier: http://hdl.handle.net/10353/15343 , vital:40399
- Description: The number of orphaned and vulnerable children in South Africa is drastically increasing which leads to most children being put in a foster care system. Yet there are great lacunae within its implementation; facilitation and monitoring which effectively affect the children involved. This evoked interest to the researcher on evaluating the effects of foster placement on childhood development; a study of Berlin Location, Buffalo City Municipality. The study intended to fulfil the following objectives: 1. To document environments that challenges foster care placement as an intervention of child placement; 2. To understand the negative impacts of foster care on a child’s psychosocial development; 3. To explore the impact of host parent’s culture to the child’s adaptation; 4. To establish the strengths and weaknesses of the South African child protection system. The study utilized qualitative paradigms guided by the qualitative research approach by adopting a case study cum phenomenological design. It employed in-depth interviews, focus groups, key informants as data collection methods. The study used both non-probability and probability sampling methods of which purposive and simple random sampling technique was utilised. The population of study was made up of twenty (20) participants who were incorporated of five (5) foster parents, five (5) key informants and ten (10) foster children. The data was analysed qualitatively through content thematic analysis. The study revealed the following findings: (i) challenges pertaining to adjustment to home milieu, (ii) lack of knowledge on foster parents’ rights and responsibilities, (iii) inadequateness of foster grant, (iv) cultural deviance, (v) prevalence of drug use and teenage pregnancy, (vi) dire lack of awareness raising sessions for the foster parents and their children, (vii) identity crisis disposition displayed by foster children, (viii) lack of individualizing cases of foster care placement by the social workers, (ix) efficiency of alternative care in comparison to residential care, (x) internalization of emotions by foster children, (xi) continued void for the biological mother’s love and affection,(xii) paucity of monitoring services to children, (xiii) information sharing and capacity building workshops for social workers a prerequisite, (xiv) Effectiveness of authoritative parenting a successful method and difficulty with telling foster children about their background. The study findings made the following recommendations: Strengthening inter-sectoral relationships and capacitate different stakeholders; Emphasis on early intervention and preventative programmes; Enforcement of punishment measure for incompliance; Implementation of training for foster parents and children; Foster care process made a specialization for social workers, Government to invest on psychosocial support and capacitating workshops for social workers. The researcher, therefore, hopes to have fulfilled the study objectives and further explored all the requirements of the study during data collection. More-so, fulfilment of objectives will assist the government and relevant stakeholders in bridging the gaps that exist with child protection.
- Full Text:
- Date Issued: 2017
An evaluation of medicinal plants used in South Africa and Lesotho for uterotonic contractile purposes
- Authors: Smit, Inge
- Date: 2016
- Subjects: Traditional medicine -- South Africa Traditional medicine -- Lesotho
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10353/15232 , vital:40256
- Description: Background One of the leading cause of maternal mortality globally is postpartum haemorrhage (PPH), which mainly occur in developing countries. By identifying traditional medicinal plants that is used by Traditional birth attendants we can analysis the plants for cyclotides which contain uterotonic properties and a wide variety of other properties. The indigenous knowledge of traditional medicinal plants need to be preserved and scientifically proven to ensure future drug development and continued use of these plants. Cyclotides can be used as a backbone to develop novel drugs in that cyclotides are very stable proteins. Methods: Ten plants were identified that are commonly used to prevent or treat postpartum haemorrhage. The plant samples were collected, prepared and dried in South Africa. The plants were analysed in Austria. The plants underwent extraction of one gram of each plant was analysed using: Matrix-Assisted Laser desorption Ionization time-of-flight Mass Spectrometry (MALDI-TOF-MS); Tandem Mass Spectrometry and Analysis by High-performance Liquid Chromatography (HPLC). Results None of the ten plants analysed showed the presence of cyclotides. It is important to report negative results, because it informs the academic fraternity and could be entered in a global data base of results. The plants analysed is known to be used by Traditional Birth Attendants for the treatment or prevention of postpartum haemorrhage. Conclusion All the plants analysed are commonly used to prevent and treat PPH. The fact that no cyclotides were found do not dispute the practical use of these plants to prevent and treat PPH. There continue to be a gap in what uterotonic properties these plants contain and should be further investigated.
- Full Text:
- Date Issued: 2016
- Authors: Smit, Inge
- Date: 2016
- Subjects: Traditional medicine -- South Africa Traditional medicine -- Lesotho
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10353/15232 , vital:40256
- Description: Background One of the leading cause of maternal mortality globally is postpartum haemorrhage (PPH), which mainly occur in developing countries. By identifying traditional medicinal plants that is used by Traditional birth attendants we can analysis the plants for cyclotides which contain uterotonic properties and a wide variety of other properties. The indigenous knowledge of traditional medicinal plants need to be preserved and scientifically proven to ensure future drug development and continued use of these plants. Cyclotides can be used as a backbone to develop novel drugs in that cyclotides are very stable proteins. Methods: Ten plants were identified that are commonly used to prevent or treat postpartum haemorrhage. The plant samples were collected, prepared and dried in South Africa. The plants were analysed in Austria. The plants underwent extraction of one gram of each plant was analysed using: Matrix-Assisted Laser desorption Ionization time-of-flight Mass Spectrometry (MALDI-TOF-MS); Tandem Mass Spectrometry and Analysis by High-performance Liquid Chromatography (HPLC). Results None of the ten plants analysed showed the presence of cyclotides. It is important to report negative results, because it informs the academic fraternity and could be entered in a global data base of results. The plants analysed is known to be used by Traditional Birth Attendants for the treatment or prevention of postpartum haemorrhage. Conclusion All the plants analysed are commonly used to prevent and treat PPH. The fact that no cyclotides were found do not dispute the practical use of these plants to prevent and treat PPH. There continue to be a gap in what uterotonic properties these plants contain and should be further investigated.
- Full Text:
- Date Issued: 2016
Being civil
- Matshoba, Zongezile Theophilus
- Authors: Matshoba, Zongezile Theophilus
- Date: 2016
- Language: English , Xhosa
- Type: Thesis , Masters , MA
- Identifier: vital:6017 , http://hdl.handle.net/10962/d1021237
- Description: My collection of short stories delves into government and governance, democracy, citizenship, civil servants, poverty, corruption and nepotism. My stories draw on the traditions of gritty urban crime fiction uncovering crimes of violence, service delivery, vandalism and corruption. They explore themes of mental cruelty and greed, self- preservation and community in rural areas, farms, townships and cities characterized by wrenching contradictions and inequalities. , This epic dramatic poetic verse delves into government and school governance, labour unions, liberation struggle, parenting and a wide range of school perceptions. It interrogates the roles of parents, teachers, students, department of education officials and that of other stakeholders that make use of schools. Influenced by William Wellington Gqoba’s ‘A great debate on education: a Parable’ wayback, it continues the education debate in the current post-democratic South Africa characterized by wrenching contradictions and inequalities. , This thesis is presented in two parts: English and isiXhosa.
- Full Text:
- Date Issued: 2016
- Authors: Matshoba, Zongezile Theophilus
- Date: 2016
- Language: English , Xhosa
- Type: Thesis , Masters , MA
- Identifier: vital:6017 , http://hdl.handle.net/10962/d1021237
- Description: My collection of short stories delves into government and governance, democracy, citizenship, civil servants, poverty, corruption and nepotism. My stories draw on the traditions of gritty urban crime fiction uncovering crimes of violence, service delivery, vandalism and corruption. They explore themes of mental cruelty and greed, self- preservation and community in rural areas, farms, townships and cities characterized by wrenching contradictions and inequalities. , This epic dramatic poetic verse delves into government and school governance, labour unions, liberation struggle, parenting and a wide range of school perceptions. It interrogates the roles of parents, teachers, students, department of education officials and that of other stakeholders that make use of schools. Influenced by William Wellington Gqoba’s ‘A great debate on education: a Parable’ wayback, it continues the education debate in the current post-democratic South Africa characterized by wrenching contradictions and inequalities. , This thesis is presented in two parts: English and isiXhosa.
- Full Text:
- Date Issued: 2016
Grade 12 learners' perceptions of the effect of urban agriculture on life satisfaction in Duncan Village
- Authors: Beni, Ntombomzi Octavia
- Date: 2016
- Subjects: Urban agriculture -- South Africa -- Eastern Cape Agricultural education
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: http://hdl.handle.net/10353/17861 , vital:41461
- Description: The importance of agricultural sciences in the school curriculum all over the world cannot be over-emphasized. It includes an alternative source of fresh produce, improved life satisfaction and a way to preserve cultural identity and traditions. This research study seeks to investigate the perception of Grade 12 learners on the effects of urban agriculture on life satisfaction in Duncan Village. The study adopts a descriptive survey design to elicit information from the respondents on their perceptions on the effects of urban agriculture on life satisfaction. A validated structured questionnaire whose reliability co-efficient is 0.81 was used to collect information. The simple random sampling technique was used to select 78 (seventy-eight) Grade 12 learners. The study reveals among others some components of life satisfaction as a result of urban agriculture. These components are; nutrition, self-employment, food security and poverty eradication and they have positive effects on life satisfaction of the respondents. The study recommends that the South Africa Government should make agriculture education as a compulsory subject for grade 10 and 11 learners in rural areas. This will enable them to develop entrepreneurial skills and self-reliance mentality before they finish their secondary school careers. Similarly, the practical components of this subject should constitute 50percent if not more from the overall marks. Realisation of this idea will alleviate, to some extent burden of unemployment and food scarcity as school leavers will be able to implement right away agricultural skills already acquired.
- Full Text:
- Date Issued: 2016
- Authors: Beni, Ntombomzi Octavia
- Date: 2016
- Subjects: Urban agriculture -- South Africa -- Eastern Cape Agricultural education
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: http://hdl.handle.net/10353/17861 , vital:41461
- Description: The importance of agricultural sciences in the school curriculum all over the world cannot be over-emphasized. It includes an alternative source of fresh produce, improved life satisfaction and a way to preserve cultural identity and traditions. This research study seeks to investigate the perception of Grade 12 learners on the effects of urban agriculture on life satisfaction in Duncan Village. The study adopts a descriptive survey design to elicit information from the respondents on their perceptions on the effects of urban agriculture on life satisfaction. A validated structured questionnaire whose reliability co-efficient is 0.81 was used to collect information. The simple random sampling technique was used to select 78 (seventy-eight) Grade 12 learners. The study reveals among others some components of life satisfaction as a result of urban agriculture. These components are; nutrition, self-employment, food security and poverty eradication and they have positive effects on life satisfaction of the respondents. The study recommends that the South Africa Government should make agriculture education as a compulsory subject for grade 10 and 11 learners in rural areas. This will enable them to develop entrepreneurial skills and self-reliance mentality before they finish their secondary school careers. Similarly, the practical components of this subject should constitute 50percent if not more from the overall marks. Realisation of this idea will alleviate, to some extent burden of unemployment and food scarcity as school leavers will be able to implement right away agricultural skills already acquired.
- Full Text:
- Date Issued: 2016
The influence of physical service recovery and online service recovery on trust and relationship retention
- Authors: Dube, Langelihle
- Date: 2016
- Subjects: Consumer complaints Customer loyalty Customer services
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10353/12766 , vital:39359
- Description: Service mishaps remain a profound topic in business due to their inevitability and detrimental impacts they bring about. As a result of this incessant detrimental effect, service recovery has been initiated into business exchanges to curb such. Moreover, service recovery programmes have been embarked on both in the offline and online delivery systems to retain this diverse need market consisting of the technological averse and experts in trading. This study therefore has to pinpoint the difficulties experienced in offline and online service recovery procedures and demarcate which of the two is the preferred channel. Service failures cut across all sectors and industries, and banking has not been spared in turn. Clients tend to choose a service recovery method based on various factors such as the panel of occurrence, technological skills and awareness, personal behaviours and available options provided by the service provider. Clients tend to choose a service recovery method based on various factors such as the panel of occurrence, technological skills and awareness, personal behaviours and available options provided by the service provider (Buttle, (2009); Clark & Melancon, (2013). The panel of occurrence depicts the method of service delivery that resulted in failed services, thus, an online service delivery is likely to attract an online resolution. Customers who transact online are highly likely to choose the same recovery method due to the associated innate benefits. Technological skills and awareness deal with the client’s articulateness in navigating the business’ website in effort to resolve the encountered problem. Personal behaviours explain that introvert clients would prefer to interact with the system and assistants online to resolve the issue while extroverts will choose the offline methods so as to experience facial interactions. Organisations sometimes detect the panel of solution based on the severity of the problem. Thus, for example, serious problems to be handled using physical means. Assessments of the degree of impact on retaining relations and gaining trust that presently employed recovery strategies pose were unearthed in this study. For physical service recovery, contact, empathy and politeness were assessed on the significance they have in recouping failed services. Responsiveness and the state of the bank’s websites will also depict the degree to which failed clients can be restored in online service delivery. Physical service recovery received greater apprehension by clients during a service error with empathy and politeness emerging as the most customer required successful strategy to enhance relations and trust thereafter. Despite its less preference, online service recovery strategies such as responsiveness and website interface resulted in significant correlations affirming their importance during service delivery and recovery. The measurement model fit quite well with sound goodness of fit indices results as per the comparison with the recommended thresholds. Moreover, the Structural Equation Model fit well with data collected.
- Full Text:
- Date Issued: 2016
- Authors: Dube, Langelihle
- Date: 2016
- Subjects: Consumer complaints Customer loyalty Customer services
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10353/12766 , vital:39359
- Description: Service mishaps remain a profound topic in business due to their inevitability and detrimental impacts they bring about. As a result of this incessant detrimental effect, service recovery has been initiated into business exchanges to curb such. Moreover, service recovery programmes have been embarked on both in the offline and online delivery systems to retain this diverse need market consisting of the technological averse and experts in trading. This study therefore has to pinpoint the difficulties experienced in offline and online service recovery procedures and demarcate which of the two is the preferred channel. Service failures cut across all sectors and industries, and banking has not been spared in turn. Clients tend to choose a service recovery method based on various factors such as the panel of occurrence, technological skills and awareness, personal behaviours and available options provided by the service provider. Clients tend to choose a service recovery method based on various factors such as the panel of occurrence, technological skills and awareness, personal behaviours and available options provided by the service provider (Buttle, (2009); Clark & Melancon, (2013). The panel of occurrence depicts the method of service delivery that resulted in failed services, thus, an online service delivery is likely to attract an online resolution. Customers who transact online are highly likely to choose the same recovery method due to the associated innate benefits. Technological skills and awareness deal with the client’s articulateness in navigating the business’ website in effort to resolve the encountered problem. Personal behaviours explain that introvert clients would prefer to interact with the system and assistants online to resolve the issue while extroverts will choose the offline methods so as to experience facial interactions. Organisations sometimes detect the panel of solution based on the severity of the problem. Thus, for example, serious problems to be handled using physical means. Assessments of the degree of impact on retaining relations and gaining trust that presently employed recovery strategies pose were unearthed in this study. For physical service recovery, contact, empathy and politeness were assessed on the significance they have in recouping failed services. Responsiveness and the state of the bank’s websites will also depict the degree to which failed clients can be restored in online service delivery. Physical service recovery received greater apprehension by clients during a service error with empathy and politeness emerging as the most customer required successful strategy to enhance relations and trust thereafter. Despite its less preference, online service recovery strategies such as responsiveness and website interface resulted in significant correlations affirming their importance during service delivery and recovery. The measurement model fit quite well with sound goodness of fit indices results as per the comparison with the recommended thresholds. Moreover, the Structural Equation Model fit well with data collected.
- Full Text:
- Date Issued: 2016
Understanding sexual concurrency and HIV/AIDS: implicit and explicit attitudes in a South African student population
- Authors: Malataliana, Maleeto Lucy
- Date: 2016
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10962/3335 , vital:20484
- Description: There are more people infected with HIV in South Africa, than in any other country in the world. Studies indicate a plausible relationship between concurrently organised sexual partnership and the spread of STIs, with concurrency being accountable for as much as 74% of HIV infections in South Africa. Understanding sexual concurrency is therefore of vital importance, especially in the South African perspective. It has, however, become increasingly unreliable to rely solely on explicit self-measures to study sexual concurrency, and research has suggested that implicit cognition is a reliable alternative to understanding sexual behaviour and attitudes towards sexuality, which cannot be directly measured by explicit means. The purpose of this study was to understand sexual concurrency among a population of university students by researching their implicit and explicit attitudes towards sexual concurrency; and thereby to aid in understanding sexual concurrency in relation to the spread of HIV. A quantitative research methodology was used to analyse results from explicit measures of sexual concurrency in the form of a questionnaire, and implicit measures of sexual concurrency in the form of the Implicit Association Test (IAT). Although no correlation existed between implicit and explicit measures attitudes towards sexual concurrency, it was, however, observed that sexual concurrency has and is being broadly practiced, and that age is a key determinant for sexual concurrency.
- Full Text:
- Date Issued: 2016
- Authors: Malataliana, Maleeto Lucy
- Date: 2016
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10962/3335 , vital:20484
- Description: There are more people infected with HIV in South Africa, than in any other country in the world. Studies indicate a plausible relationship between concurrently organised sexual partnership and the spread of STIs, with concurrency being accountable for as much as 74% of HIV infections in South Africa. Understanding sexual concurrency is therefore of vital importance, especially in the South African perspective. It has, however, become increasingly unreliable to rely solely on explicit self-measures to study sexual concurrency, and research has suggested that implicit cognition is a reliable alternative to understanding sexual behaviour and attitudes towards sexuality, which cannot be directly measured by explicit means. The purpose of this study was to understand sexual concurrency among a population of university students by researching their implicit and explicit attitudes towards sexual concurrency; and thereby to aid in understanding sexual concurrency in relation to the spread of HIV. A quantitative research methodology was used to analyse results from explicit measures of sexual concurrency in the form of a questionnaire, and implicit measures of sexual concurrency in the form of the Implicit Association Test (IAT). Although no correlation existed between implicit and explicit measures attitudes towards sexual concurrency, it was, however, observed that sexual concurrency has and is being broadly practiced, and that age is a key determinant for sexual concurrency.
- Full Text:
- Date Issued: 2016
Using bioinformatics tools to screen for trypanosomal cathepsin B cysteine protease inhibitors from the SANCDB as a novel therapeutic modality against Human African Trypanosomiasis (HAT)
- Authors: Mokhawa, Gaone
- Date: 2016
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/3304 , vital:20470
- Description: Human African Trypanosomiasis (HAT), also known as sleeping sickness, is a fatal chronic disease that is caused by flagellated protozoans, Trypanosoma brucei gambiense and Trypanosoma brucei rhodesiense. HAT is spread by a bite from an infected tsetse fly of the Glosina genus. Up to 60 million people in 36 countries in sub-Saharan Africa are at a risk of infection from HAT with up to 30 000 deaths reported every year. Current chemotherapy for HAT is insufficient since the available drugs exhibit unacceptable side effects (toxicity) and parasite resistance. Novel treatments and approaches for development of specific and more potent drugs for HAT are therefore required. One approach is to target vital proteins that are essential to the life cycle of the parasite. The main interest of this study is to explore Trypanosoma brucei cathepsin B-like protease (TbCatB) structural and functional properties with the primary goal of discovering non peptide small molecule inhibitors of TbCatB using bioinformatics approaches. TbCatB is a papain family C1 cysteine protease which belongs to clan CA group and it has emerged as a potential HAT drug target. Papain family cysteine proteases of Clan CA group of Trypanosoma brucei (rhodesain and TbCatB) have demonstrated potential as chemotherapeutic targets using synthetic protease inhibitors like Z-Phe-Ala-CHN2 to kill the parasite in vitro and in vivo. TbCatB has been identified as the essential cysteine protease of T. brucei since mRNA silencing of TbCatB killed the parasite and resulted in a cure in mice infected with T. brucei while mRNA silencing of rhodesain only extended mice life. TbCatB is therefore a promising drug target against HAT and the discovery and development of compounds that can selectively inhibit TbCatB without posing any danger to the human host represent a great therapeutic solution for treatment of HAT. To understand protein-inhibitor interactions, useful information can be obtained from high resolution protease-inhibitor crystal structure complexes. This study aims to use bioinformatics approaches to carry out comparative sequence, structural and functional analysis of TbCatB protease and its homologs from T. congolense, T, cruzi, T. vivax and H. sapien as well as to identify non-peptide small molecule inhibitors of TbCatB cysteine proteases from natural compounds of South African origin. Sequences of TbCatB (PDB ID: 3HHI) homologs were retrieved by a BLAST search. Human cathepsin B (PDB ID: 3CBJ) was selected from a list of templates for homology modelling found by HHpred. MODELLER version 9.10 program was used to generate a hundred models for T. congolense, T, cruzi and T. vivax cathepsin B like proteases using 3HHI and 3CBJ as templates. The best models were chosen based on their low DOPE Z scores before validation using MetaMQAPII, ANOLEA, PROCHECK and QMEAN6. The DOPE Z scores and the RMSD (RMS) values of the calculated models indicate that the models are of acceptable energy (stability) and fold (conformation). Results from the different MQAPs indicate the models are of acceptable quality and they can be used for docking studies. High throughput screening of SANCDB using AutoDock Vina revealed nine compounds, SANC00 478, 479, 480, 481, 482, 488, 489, 490 and 491, having a strong affinity for Trypanosoma spp. cathepsin B proteases than HsCatB. SANC00488 has the strongest binding to Trypanosoma spp. cathepsin B proteases and the weakest binding to HsCatB protease. Molecular dynamics (MD) simulations show that the complexes between SANC00488 and TbCatB, TcCatB, TcrCatB and TvCatB are stable and do not come apart during simulation. The complex between this compound and HsCatB however is unstable and comes apart during simulation. Residues that are important for the stability of SANC00488-TbCatB complex are Gly328 of the S2 subsite, Phe208, and Ala256. In conclusion SANC00488 is a good candidate for development of a drug against HAT.
- Full Text:
- Date Issued: 2016
- Authors: Mokhawa, Gaone
- Date: 2016
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/3304 , vital:20470
- Description: Human African Trypanosomiasis (HAT), also known as sleeping sickness, is a fatal chronic disease that is caused by flagellated protozoans, Trypanosoma brucei gambiense and Trypanosoma brucei rhodesiense. HAT is spread by a bite from an infected tsetse fly of the Glosina genus. Up to 60 million people in 36 countries in sub-Saharan Africa are at a risk of infection from HAT with up to 30 000 deaths reported every year. Current chemotherapy for HAT is insufficient since the available drugs exhibit unacceptable side effects (toxicity) and parasite resistance. Novel treatments and approaches for development of specific and more potent drugs for HAT are therefore required. One approach is to target vital proteins that are essential to the life cycle of the parasite. The main interest of this study is to explore Trypanosoma brucei cathepsin B-like protease (TbCatB) structural and functional properties with the primary goal of discovering non peptide small molecule inhibitors of TbCatB using bioinformatics approaches. TbCatB is a papain family C1 cysteine protease which belongs to clan CA group and it has emerged as a potential HAT drug target. Papain family cysteine proteases of Clan CA group of Trypanosoma brucei (rhodesain and TbCatB) have demonstrated potential as chemotherapeutic targets using synthetic protease inhibitors like Z-Phe-Ala-CHN2 to kill the parasite in vitro and in vivo. TbCatB has been identified as the essential cysteine protease of T. brucei since mRNA silencing of TbCatB killed the parasite and resulted in a cure in mice infected with T. brucei while mRNA silencing of rhodesain only extended mice life. TbCatB is therefore a promising drug target against HAT and the discovery and development of compounds that can selectively inhibit TbCatB without posing any danger to the human host represent a great therapeutic solution for treatment of HAT. To understand protein-inhibitor interactions, useful information can be obtained from high resolution protease-inhibitor crystal structure complexes. This study aims to use bioinformatics approaches to carry out comparative sequence, structural and functional analysis of TbCatB protease and its homologs from T. congolense, T, cruzi, T. vivax and H. sapien as well as to identify non-peptide small molecule inhibitors of TbCatB cysteine proteases from natural compounds of South African origin. Sequences of TbCatB (PDB ID: 3HHI) homologs were retrieved by a BLAST search. Human cathepsin B (PDB ID: 3CBJ) was selected from a list of templates for homology modelling found by HHpred. MODELLER version 9.10 program was used to generate a hundred models for T. congolense, T, cruzi and T. vivax cathepsin B like proteases using 3HHI and 3CBJ as templates. The best models were chosen based on their low DOPE Z scores before validation using MetaMQAPII, ANOLEA, PROCHECK and QMEAN6. The DOPE Z scores and the RMSD (RMS) values of the calculated models indicate that the models are of acceptable energy (stability) and fold (conformation). Results from the different MQAPs indicate the models are of acceptable quality and they can be used for docking studies. High throughput screening of SANCDB using AutoDock Vina revealed nine compounds, SANC00 478, 479, 480, 481, 482, 488, 489, 490 and 491, having a strong affinity for Trypanosoma spp. cathepsin B proteases than HsCatB. SANC00488 has the strongest binding to Trypanosoma spp. cathepsin B proteases and the weakest binding to HsCatB protease. Molecular dynamics (MD) simulations show that the complexes between SANC00488 and TbCatB, TcCatB, TcrCatB and TvCatB are stable and do not come apart during simulation. The complex between this compound and HsCatB however is unstable and comes apart during simulation. Residues that are important for the stability of SANC00488-TbCatB complex are Gly328 of the S2 subsite, Phe208, and Ala256. In conclusion SANC00488 is a good candidate for development of a drug against HAT.
- Full Text:
- Date Issued: 2016
Professional development among counselling psychology interns : exploring critical incidents
- Authors: Teixeira, Beverley
- Date: 2015
- Subjects: Counseling psychologists -- Training of -- South Africa , Critical incident technique , Career development -- South Africa , Internship programs -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3265 , http://hdl.handle.net/10962/d1017888
- Description: The journey towards becoming a counselling psychologist, in South Africa, includes the completion a 12 month internship. The internship year holds many challenges and demands for novice professionals and aims to assist them in making the transition from student to professional. This study aims to explore the subjective experiences of intern counselling psychologists and the critical incidents which assist them in making this transition. In addition, it aims to identify experiences impacting on the interns’ professional development and professional identity. Three registered counselling psychologists, who completed their internship at a South African university counselling centre within the last year, were recruited and participated in individual interviews. These interviews were semi-structured and followed the Critical Incident Technique method. Each interview was voice recorded and transcribed. The data collected was analysed using thematic content analysis. As the research design is qualitative, using a phenomenological approach, the focus is on presenting information-rich and detailed descriptions of participants “lived” experiences of their internship year. It attempts to understand significant incidents or events which influenced the participants’ professional and personal development as they navigate through this ambiguous period to become independent and ethical practitioners. Four predominant themes emerged from the data collected, which include a discussion pertaining to professional boundaries and limitations, learning within the internship environment, the effects of professional and personal support and, lastly, the transition from dependent to independent professional functioning.
- Full Text:
- Date Issued: 2015
- Authors: Teixeira, Beverley
- Date: 2015
- Subjects: Counseling psychologists -- Training of -- South Africa , Critical incident technique , Career development -- South Africa , Internship programs -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3265 , http://hdl.handle.net/10962/d1017888
- Description: The journey towards becoming a counselling psychologist, in South Africa, includes the completion a 12 month internship. The internship year holds many challenges and demands for novice professionals and aims to assist them in making the transition from student to professional. This study aims to explore the subjective experiences of intern counselling psychologists and the critical incidents which assist them in making this transition. In addition, it aims to identify experiences impacting on the interns’ professional development and professional identity. Three registered counselling psychologists, who completed their internship at a South African university counselling centre within the last year, were recruited and participated in individual interviews. These interviews were semi-structured and followed the Critical Incident Technique method. Each interview was voice recorded and transcribed. The data collected was analysed using thematic content analysis. As the research design is qualitative, using a phenomenological approach, the focus is on presenting information-rich and detailed descriptions of participants “lived” experiences of their internship year. It attempts to understand significant incidents or events which influenced the participants’ professional and personal development as they navigate through this ambiguous period to become independent and ethical practitioners. Four predominant themes emerged from the data collected, which include a discussion pertaining to professional boundaries and limitations, learning within the internship environment, the effects of professional and personal support and, lastly, the transition from dependent to independent professional functioning.
- Full Text:
- Date Issued: 2015
Sources of change in the money stock
- Smith, Robert Ayreton Bailey
- Authors: Smith, Robert Ayreton Bailey
- Date: 2015
- Subjects: Money supply -- South Africa , Money -- South Africa , Banks and banking, Central -- South Africa
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:1118 , http://hdl.handle.net/10962/d1017543
- Description: This research provides an historical, theoretical and practical appraisal of exogenous and endogenous money and money creation, with South Africa as the focus of the practical investigation. Monetary theory of recent decades can be categorised as belonging to one of two distinct paradigms: mainstream (neoclassical) or post Keynesian. The mainstream (orthodox) view presents a Euclidian or Cartesian, ergodic, deductive, and axiomatic theoretical interpretation of the world. This is perpetuated through the continued, and inaccurate, depiction in academia of exogenous money creation, the money multiplier concept, asset transformation by banks, imposed alterations to the money stock by central banks and long-run closed system equilibrium models (and associated homogeneity, and long term behavioural assumptions). In the real world, economic agents, structures, institutions and their interrelations are perpetually evolving. The post Keynesian paradigm provides the theoretical framework within which to understand such a world. Unfortunately the necessity for a multiplicity of methods and methodology makes it a paradigm that is currently prohibitively complex, preventing simple exposition. Money creation should, both historically, and according to the analysis conducted, be defined according to the actual source of change in the money stock, that is, credit extension. In a nonergodic world, changes in the stock of money take on a causal role with regard the initiation of productive processes, and thus influence future economic conditions. The simple, although powerful, technique of balance sheet analysis conducted herein provides a detailed method of identification of causal changes in money stock. Within the context of the institutional and structural environment, it clearly demonstrates the residual nature of money m modern economies. This research serves to emphasise the importance of monetary matters for economic management, as well as the important difference between the money creation process and the residual deposit securities. It serves also to discourage the perpetuation of fallacies of money creation, and capabilities of monetary authorities. In South Africa, as in most countries, the central bank can influence the conditions under which borrowers and banks mutually create money, but do not themselves create or distribute money beyond the facilitation of credit extension by banks
- Full Text:
- Date Issued: 2015
- Authors: Smith, Robert Ayreton Bailey
- Date: 2015
- Subjects: Money supply -- South Africa , Money -- South Africa , Banks and banking, Central -- South Africa
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:1118 , http://hdl.handle.net/10962/d1017543
- Description: This research provides an historical, theoretical and practical appraisal of exogenous and endogenous money and money creation, with South Africa as the focus of the practical investigation. Monetary theory of recent decades can be categorised as belonging to one of two distinct paradigms: mainstream (neoclassical) or post Keynesian. The mainstream (orthodox) view presents a Euclidian or Cartesian, ergodic, deductive, and axiomatic theoretical interpretation of the world. This is perpetuated through the continued, and inaccurate, depiction in academia of exogenous money creation, the money multiplier concept, asset transformation by banks, imposed alterations to the money stock by central banks and long-run closed system equilibrium models (and associated homogeneity, and long term behavioural assumptions). In the real world, economic agents, structures, institutions and their interrelations are perpetually evolving. The post Keynesian paradigm provides the theoretical framework within which to understand such a world. Unfortunately the necessity for a multiplicity of methods and methodology makes it a paradigm that is currently prohibitively complex, preventing simple exposition. Money creation should, both historically, and according to the analysis conducted, be defined according to the actual source of change in the money stock, that is, credit extension. In a nonergodic world, changes in the stock of money take on a causal role with regard the initiation of productive processes, and thus influence future economic conditions. The simple, although powerful, technique of balance sheet analysis conducted herein provides a detailed method of identification of causal changes in money stock. Within the context of the institutional and structural environment, it clearly demonstrates the residual nature of money m modern economies. This research serves to emphasise the importance of monetary matters for economic management, as well as the important difference between the money creation process and the residual deposit securities. It serves also to discourage the perpetuation of fallacies of money creation, and capabilities of monetary authorities. In South Africa, as in most countries, the central bank can influence the conditions under which borrowers and banks mutually create money, but do not themselves create or distribute money beyond the facilitation of credit extension by banks
- Full Text:
- Date Issued: 2015
The presentation of African government leaders or Sovereigns' in selected African and mainstream films
- Tjalle, Rosalie Olivia Vanessa
- Authors: Tjalle, Rosalie Olivia Vanessa
- Date: 2015
- Subjects: Motion pictures -- Political aspects -- Africa Political science -- Philosophy , Sovereignty
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/12392 , vital:27062
- Description: African Cinema is an entity as diverse as the various countries, languages and cultures on this continent. The entertainment value of Cinema has been more popular than the study of its ideological significance, but nevertheless in a contemporary Africa where politics affect the social, cultural and economical survival of its citizens, Cinema can be used as a valuable asset and a powerful means of communication that can conscientize and educate African audiences. Thomas Hobbes’s leadership model and political theory of sovereignty, though a XVIIth century framework, can theoretically contribute in the analysis of the representation of African leadership styles in Cinema. This article analyzes four fiction films representing four different political leaders in, respectively, South Africa, Uganda, Cameroon and Nigeria. A film content analysis will explore the different representation of leadership styles, the personality of each leader, the power struggles in each society and how this may suggest value judgments about African leadership to the films’ various target audiences.
- Full Text:
- Date Issued: 2015
- Authors: Tjalle, Rosalie Olivia Vanessa
- Date: 2015
- Subjects: Motion pictures -- Political aspects -- Africa Political science -- Philosophy , Sovereignty
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/12392 , vital:27062
- Description: African Cinema is an entity as diverse as the various countries, languages and cultures on this continent. The entertainment value of Cinema has been more popular than the study of its ideological significance, but nevertheless in a contemporary Africa where politics affect the social, cultural and economical survival of its citizens, Cinema can be used as a valuable asset and a powerful means of communication that can conscientize and educate African audiences. Thomas Hobbes’s leadership model and political theory of sovereignty, though a XVIIth century framework, can theoretically contribute in the analysis of the representation of African leadership styles in Cinema. This article analyzes four fiction films representing four different political leaders in, respectively, South Africa, Uganda, Cameroon and Nigeria. A film content analysis will explore the different representation of leadership styles, the personality of each leader, the power struggles in each society and how this may suggest value judgments about African leadership to the films’ various target audiences.
- Full Text:
- Date Issued: 2015
The impact of learning advancement and quality of work-life on turnover intentions among nurses in Amathole District, South Africa
- Authors: Marufu, Tandiwe Joy
- Date: 2014
- Subjects: Nurses -- Job satisfaction -- South Africa -- Eastern Cape Employee retention -- South Africa -- Eastern Cape Labor turnover -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10353/5630 , vital:29353
- Description: Ongoing instability in the nursing workforce is raising questions globally about the issue of nurse turnover. It is against this background that this research examines the impact of learning, advancement and quality of work-life on turnover intentions among nurses in selected hospitals from Eastern Cape. Little research has been conducted to investigate the impact of the above mentioned subjects on turnover intentions among nurses in the South African health sector. Research questions as well as hypotheses were formulated as the means to gain data on the subject. The research employed a quantitative design with a sample size of 160 nurses and 159 were returned. The data analysis consisted of both descriptive and inferential statistics. The main findings of the study showed a positive relationship among job satisfaction, work-life rewards, learning and advancement opportunities and job satisfaction. However, there were negative relationships between job satisfaction and turnover intentions; work-life rewards and turnover intentions; and also among learning, career advancement and turnover intentions. Finally, suggestions were made to the top management in the Health sector to come up with strategies and mechanisms that improve nurses’ quality of work-life and offering them training and advancement opportunities through organisational change programs.
- Full Text:
- Date Issued: 2014
- Authors: Marufu, Tandiwe Joy
- Date: 2014
- Subjects: Nurses -- Job satisfaction -- South Africa -- Eastern Cape Employee retention -- South Africa -- Eastern Cape Labor turnover -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10353/5630 , vital:29353
- Description: Ongoing instability in the nursing workforce is raising questions globally about the issue of nurse turnover. It is against this background that this research examines the impact of learning, advancement and quality of work-life on turnover intentions among nurses in selected hospitals from Eastern Cape. Little research has been conducted to investigate the impact of the above mentioned subjects on turnover intentions among nurses in the South African health sector. Research questions as well as hypotheses were formulated as the means to gain data on the subject. The research employed a quantitative design with a sample size of 160 nurses and 159 were returned. The data analysis consisted of both descriptive and inferential statistics. The main findings of the study showed a positive relationship among job satisfaction, work-life rewards, learning and advancement opportunities and job satisfaction. However, there were negative relationships between job satisfaction and turnover intentions; work-life rewards and turnover intentions; and also among learning, career advancement and turnover intentions. Finally, suggestions were made to the top management in the Health sector to come up with strategies and mechanisms that improve nurses’ quality of work-life and offering them training and advancement opportunities through organisational change programs.
- Full Text:
- Date Issued: 2014
The impact of learning advancement and quality of work-life on turnover intentions among nurses in Amathole District, South Africa
- Authors: Marufu, Tandiwe Joy
- Date: 2014
- Subjects: Nurses -- Job satisfaction -- South Africa -- Eastern Cape Employee retention -- South Africa -- Eastern Cape Labor turnover -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10353/2182 , vital:27666
- Description: Ongoing instability in the nursing workforce is raising questions globally about the issue of nurse turnover. It is against this background that this research examines the impact of learning, advancement and quality of work-life on turnover intentions among nurses in selected hospitals from Eastern Cape. Little research has been conducted to investigate the impact of the above mentioned subjects on turnover intentions among nurses in the South African health sector. Research questions as well as hypotheses were formulated as the means to gain data on the subject. The research employed a quantitative design with a sample size of 160 nurses and 159 were returned. The data analysis consisted of both descriptive and inferential statistics. The main findings of the study showed a positive relationship among job satisfaction, work-life rewards, learning and advancement opportunities and job satisfaction. However, there were negative relationships between job satisfaction and turnover intentions; work-life rewards and turnover intentions; and also among learning, career advancement and turnover intentions. Finally, suggestions were made to the top management in the Health sector to come up with strategies and mechanisms that improve nurses’ quality of work-life and offering them training and advancement opportunities through organisational change programs.
- Full Text:
- Date Issued: 2014
- Authors: Marufu, Tandiwe Joy
- Date: 2014
- Subjects: Nurses -- Job satisfaction -- South Africa -- Eastern Cape Employee retention -- South Africa -- Eastern Cape Labor turnover -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10353/2182 , vital:27666
- Description: Ongoing instability in the nursing workforce is raising questions globally about the issue of nurse turnover. It is against this background that this research examines the impact of learning, advancement and quality of work-life on turnover intentions among nurses in selected hospitals from Eastern Cape. Little research has been conducted to investigate the impact of the above mentioned subjects on turnover intentions among nurses in the South African health sector. Research questions as well as hypotheses were formulated as the means to gain data on the subject. The research employed a quantitative design with a sample size of 160 nurses and 159 were returned. The data analysis consisted of both descriptive and inferential statistics. The main findings of the study showed a positive relationship among job satisfaction, work-life rewards, learning and advancement opportunities and job satisfaction. However, there were negative relationships between job satisfaction and turnover intentions; work-life rewards and turnover intentions; and also among learning, career advancement and turnover intentions. Finally, suggestions were made to the top management in the Health sector to come up with strategies and mechanisms that improve nurses’ quality of work-life and offering them training and advancement opportunities through organisational change programs.
- Full Text:
- Date Issued: 2014
The role of the deep spawning grounds in chokka squid (Loligo reynaudi d'orbigny, 1845) recruitment
- Authors: Downey, Nicola Jean
- Date: 2014
- Subjects: Squids -- Spawning -- South Africa Squids -- Effect of temperature on -- South Africa Squids -- Embryos -- South Africa Squids -- South Africa -- Geographical distribution Loligo -- Research -- South Africa Loligo fisheries -- South Africa Recruitment (Population biology) -- South Africa
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:5359 , http://hdl.handle.net/10962/d1011867
- Description: It was previously thought that the South African chokka squid Loligo reynaudi is exclusively an inshore, shallow water spawner. Although spawning mostly within shallow bays (<60 m) the presence of squid eggs in trawls at depths up to 130 m indicates this species frequently makes use of deeper spawning areas on the mid-shelf. The extent of mid-shelf spawning (referred to as deep spawning) and the contribution to recruitment has yet to be assessed. Studies have shown mid-shelf bottom temperature to vary considerably from those inshore, suggesting chokka squid spawn in two very different oceanographic environments. Considering these apparent environmental differences, what leads to the mid-shelf environment becoming a suitable spawning habitat? Does a suitable benthic habitat, required for the attachment of egg pods, occur on the mid-shelf? These questions are not only important for determining the extent of deep spawning, but also to the understanding of factors “driving” deep spawning. The fate of deep spawned hatchlings is another unknown. It has been proposed that the main chokka squid inshore spawning grounds are positioned to exploit the net westward currents on the Eastern Agulhas Bank, i.e. paralarvae would be transported west from the hatching site to the cold ridge, an area of high primary and secondary productivity on the Central Agulhas Bank. This concept has come to be known as the Western Transport Hypothesis. Lagrangian ROMS-IBMs (regional ocean model system – individual-based model) predict the net westward transport of paralarvae from both the inshore and deep spawning grounds, to the cold ridge. These simulations were used to investigate the transport of hatchlings to the cold ridge feeding grounds before the exhaustion of yolk reserves. The fate of paralarvae on reaching the feeding grounds has not yet been investigated. This work has contributed new knowledge to our understanding of deep spawning and its role in recruitment. Specific aims of this study were to (1) determine the extent, range and importance of the deep spawning grounds relative to those inshore; (2) investigate the deep spawning ground habitat (Agulhas Bank mid-shelf) morphology and oceanographic environment; (3) determine the transport and survival of deep spawned hatchlings; and (4) investigate the origin and distribution of chokka squid paralarvae on the Agulhas Bank. The extent, depth range and importance of the deep spawning grounds, relative to those inshore was assessed using 23 years of demersal trawl survey data. Data for both the west and south coasts of South Africa were examined for egg capsules. No spawning was found on the west coast. Data showed that chokka squid preferred the Eastern Agulhas Bank for spawning. Spawning occurred not only inshore but also on the mid-shelf extending to depths of 270 m near the shelf edge. The majority of deep spawned eggs however, were found in the depth range 71-130 m. Squid egg density markedly decreased beyond 70 m, suggesting delineation between the inshore and deep spawning grounds. Total egg biomass calculations for depths shallower and deeper than 70 m indicated the coastal area to be strongly favoured, i.e. 82 vs. 18%. These results contest the commonly accepted notion that chokka squid is an inshore spawner and redefine the spawning grounds to extend across the shelf. Apart from an initial study investigating bottom temperature on the mid-shelf, very little is known about the deep spawning habitat. St Francis Bay, a commonly used spawning location, was chosen as a demonstration area for further study. The deep spawning grounds (71-130 m) were mapped and benthic habitat described from underwater video footage. A study investigating cross-shelf bottom conditions was undertaken off Thys Bay. CTD data were used to compare seasonal bottom temperature and oxygen on the St Francis Bay inshore and deep spawning grounds. Squid movement between the two spawning habitats was assessed using filament tagging. Predation and fishing pressure across the spawning grounds was reviewed. The mid-shelf benthic habitat was found to be similar to that inshore and available for spawning. Despite the generally colder bottom temperatures on the mid-shelf, this study showed that bottom temperature in deeper waters can at times be warmer than inshore. Although mid-shelf warming events lasted from a few hours to a number of days, they resulted in similar conditions to those on the inshore spawning grounds. It is likely these events act to expand or shift spawning habitat. The movement of squid between the two spawning habitats makes it possible for them to seek patches of warm bottom water with appropiate substrate. This suggests they are spawning habitat opportunists. Predation and fishing pressure appear to be higher on the inshore spawning grounds. It is feasible that this also forces spawners to seek out more favourable habitat offshore. An individual-based model was used to predict the fate of mid-shelf and inshore hatched paralarvae. Within the model, both the highly productive cold ridge and inshore spawning grounds were considered feeding or nursery areas. Paralarvae were released from six inshore and six deep spawning sites, spanning the coast between Port Alfred and Knysna. All paralarvae not reaching the feeding areas before the exhaustion of yolk-reserves (≤5 days), not retained within the feeding grounds (≥14 days), and not retained on the Agulhas Bank after exiting the feeding grounds were considered lost. This work illustrated the dependence of paralarval transport success on both spawning location and time of hatching, as established in earlier studies. The current IBM has expanded on initial work, emphasizing the importance of the cold ridge and inshore spawning grounds as nursery areas for deep and inshore spawned paralarvae, respectively. This work has highlighted the complex interactions between processes influencing recruitment variability for chokka squid. Possible relationships between periods of highest recruitment success and spawning peaks were identified for both spawning habitats. Based on the likely autumn increase in deep spawning off Tsitsikamma, and the beneficial currents during this period, it can be concluded deep spawning may at times contribute significantly to recruitment. This is particularly true for years where the cold ridge persists into winter. Data on chokka squid paralarval distribution are scarce. Paralarval distribution and abundance, in relation to Agulhas Bank oceanography, was investigated using bongo caught paralarvae and corresponding oceanographic data. Individual-based models (IBMs) were used to predict the origin or spawning site of the wild caught paralarvae, with reference to inshore versus deep spawning. Although failing to predict realistic points of origin, this study provided evidence to support a number of scenarios previously assumed to influence chokka squid recruitment. First is the possible influence of coastal upwelling on the retention, and hence spatial distribution, of paralarvae on the inshore spawning grounds. The second factor thought to impact recruitment is the loss of paralarvae from the Agulhas Bank ecosystem. This study confirmed the removal of paralarvae from the Eastern Agulhas Bank due to Agulhas Current boundary phenomena and resultant offshelf leakage. In addition, data suggested that the formation of the cold ridge could enhance retention on the Central Agulhas Bank, and so prevent offshelf leakage from the Central and Western Agulhas Bank. A synthesis of the main conclusions is presented. Implications of the findings and directions for future research are discussed.
- Full Text:
- Date Issued: 2014
- Authors: Downey, Nicola Jean
- Date: 2014
- Subjects: Squids -- Spawning -- South Africa Squids -- Effect of temperature on -- South Africa Squids -- Embryos -- South Africa Squids -- South Africa -- Geographical distribution Loligo -- Research -- South Africa Loligo fisheries -- South Africa Recruitment (Population biology) -- South Africa
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:5359 , http://hdl.handle.net/10962/d1011867
- Description: It was previously thought that the South African chokka squid Loligo reynaudi is exclusively an inshore, shallow water spawner. Although spawning mostly within shallow bays (<60 m) the presence of squid eggs in trawls at depths up to 130 m indicates this species frequently makes use of deeper spawning areas on the mid-shelf. The extent of mid-shelf spawning (referred to as deep spawning) and the contribution to recruitment has yet to be assessed. Studies have shown mid-shelf bottom temperature to vary considerably from those inshore, suggesting chokka squid spawn in two very different oceanographic environments. Considering these apparent environmental differences, what leads to the mid-shelf environment becoming a suitable spawning habitat? Does a suitable benthic habitat, required for the attachment of egg pods, occur on the mid-shelf? These questions are not only important for determining the extent of deep spawning, but also to the understanding of factors “driving” deep spawning. The fate of deep spawned hatchlings is another unknown. It has been proposed that the main chokka squid inshore spawning grounds are positioned to exploit the net westward currents on the Eastern Agulhas Bank, i.e. paralarvae would be transported west from the hatching site to the cold ridge, an area of high primary and secondary productivity on the Central Agulhas Bank. This concept has come to be known as the Western Transport Hypothesis. Lagrangian ROMS-IBMs (regional ocean model system – individual-based model) predict the net westward transport of paralarvae from both the inshore and deep spawning grounds, to the cold ridge. These simulations were used to investigate the transport of hatchlings to the cold ridge feeding grounds before the exhaustion of yolk reserves. The fate of paralarvae on reaching the feeding grounds has not yet been investigated. This work has contributed new knowledge to our understanding of deep spawning and its role in recruitment. Specific aims of this study were to (1) determine the extent, range and importance of the deep spawning grounds relative to those inshore; (2) investigate the deep spawning ground habitat (Agulhas Bank mid-shelf) morphology and oceanographic environment; (3) determine the transport and survival of deep spawned hatchlings; and (4) investigate the origin and distribution of chokka squid paralarvae on the Agulhas Bank. The extent, depth range and importance of the deep spawning grounds, relative to those inshore was assessed using 23 years of demersal trawl survey data. Data for both the west and south coasts of South Africa were examined for egg capsules. No spawning was found on the west coast. Data showed that chokka squid preferred the Eastern Agulhas Bank for spawning. Spawning occurred not only inshore but also on the mid-shelf extending to depths of 270 m near the shelf edge. The majority of deep spawned eggs however, were found in the depth range 71-130 m. Squid egg density markedly decreased beyond 70 m, suggesting delineation between the inshore and deep spawning grounds. Total egg biomass calculations for depths shallower and deeper than 70 m indicated the coastal area to be strongly favoured, i.e. 82 vs. 18%. These results contest the commonly accepted notion that chokka squid is an inshore spawner and redefine the spawning grounds to extend across the shelf. Apart from an initial study investigating bottom temperature on the mid-shelf, very little is known about the deep spawning habitat. St Francis Bay, a commonly used spawning location, was chosen as a demonstration area for further study. The deep spawning grounds (71-130 m) were mapped and benthic habitat described from underwater video footage. A study investigating cross-shelf bottom conditions was undertaken off Thys Bay. CTD data were used to compare seasonal bottom temperature and oxygen on the St Francis Bay inshore and deep spawning grounds. Squid movement between the two spawning habitats was assessed using filament tagging. Predation and fishing pressure across the spawning grounds was reviewed. The mid-shelf benthic habitat was found to be similar to that inshore and available for spawning. Despite the generally colder bottom temperatures on the mid-shelf, this study showed that bottom temperature in deeper waters can at times be warmer than inshore. Although mid-shelf warming events lasted from a few hours to a number of days, they resulted in similar conditions to those on the inshore spawning grounds. It is likely these events act to expand or shift spawning habitat. The movement of squid between the two spawning habitats makes it possible for them to seek patches of warm bottom water with appropiate substrate. This suggests they are spawning habitat opportunists. Predation and fishing pressure appear to be higher on the inshore spawning grounds. It is feasible that this also forces spawners to seek out more favourable habitat offshore. An individual-based model was used to predict the fate of mid-shelf and inshore hatched paralarvae. Within the model, both the highly productive cold ridge and inshore spawning grounds were considered feeding or nursery areas. Paralarvae were released from six inshore and six deep spawning sites, spanning the coast between Port Alfred and Knysna. All paralarvae not reaching the feeding areas before the exhaustion of yolk-reserves (≤5 days), not retained within the feeding grounds (≥14 days), and not retained on the Agulhas Bank after exiting the feeding grounds were considered lost. This work illustrated the dependence of paralarval transport success on both spawning location and time of hatching, as established in earlier studies. The current IBM has expanded on initial work, emphasizing the importance of the cold ridge and inshore spawning grounds as nursery areas for deep and inshore spawned paralarvae, respectively. This work has highlighted the complex interactions between processes influencing recruitment variability for chokka squid. Possible relationships between periods of highest recruitment success and spawning peaks were identified for both spawning habitats. Based on the likely autumn increase in deep spawning off Tsitsikamma, and the beneficial currents during this period, it can be concluded deep spawning may at times contribute significantly to recruitment. This is particularly true for years where the cold ridge persists into winter. Data on chokka squid paralarval distribution are scarce. Paralarval distribution and abundance, in relation to Agulhas Bank oceanography, was investigated using bongo caught paralarvae and corresponding oceanographic data. Individual-based models (IBMs) were used to predict the origin or spawning site of the wild caught paralarvae, with reference to inshore versus deep spawning. Although failing to predict realistic points of origin, this study provided evidence to support a number of scenarios previously assumed to influence chokka squid recruitment. First is the possible influence of coastal upwelling on the retention, and hence spatial distribution, of paralarvae on the inshore spawning grounds. The second factor thought to impact recruitment is the loss of paralarvae from the Agulhas Bank ecosystem. This study confirmed the removal of paralarvae from the Eastern Agulhas Bank due to Agulhas Current boundary phenomena and resultant offshelf leakage. In addition, data suggested that the formation of the cold ridge could enhance retention on the Central Agulhas Bank, and so prevent offshelf leakage from the Central and Western Agulhas Bank. A synthesis of the main conclusions is presented. Implications of the findings and directions for future research are discussed.
- Full Text:
- Date Issued: 2014
Achieving more cost-effective implementation of an Eastern Cape Thicket Rehabilitation project
- Authors: Gusha, Samora Mkuseli
- Date: 2012
- Subjects: Project management -- Cost effectiveness , Cost control , Activity-based costing
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/6214 , vital:21056
- Description: The study was looking at achieving more cost-effective implementation of the Eastern Cape Thicket Rehabilitation Project. Project management has been identified as a key for a proper implementation of any kind of work. For project management to be effective, individual learning and development of project managers is of paramount importance. An improved communication process is vital, that clearly specifies objectives if any success will be achieved. A proper and structural way of addressing change is a need, so that no unnecessary delays are experienced. A need is there for processes to be streamlined to avoid duplications as they are unnecessary costs. Employees need to be given an opportunity to have their ideas looked at, a way of testing if they really have been empowered. The important thing is that their views must speak to the standards of the project. Reductions in costs are a must for more communities to benefit in the project. Continuous improvement is the way forward.
- Full Text:
- Date Issued: 2012
- Authors: Gusha, Samora Mkuseli
- Date: 2012
- Subjects: Project management -- Cost effectiveness , Cost control , Activity-based costing
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/6214 , vital:21056
- Description: The study was looking at achieving more cost-effective implementation of the Eastern Cape Thicket Rehabilitation Project. Project management has been identified as a key for a proper implementation of any kind of work. For project management to be effective, individual learning and development of project managers is of paramount importance. An improved communication process is vital, that clearly specifies objectives if any success will be achieved. A proper and structural way of addressing change is a need, so that no unnecessary delays are experienced. A need is there for processes to be streamlined to avoid duplications as they are unnecessary costs. Employees need to be given an opportunity to have their ideas looked at, a way of testing if they really have been empowered. The important thing is that their views must speak to the standards of the project. Reductions in costs are a must for more communities to benefit in the project. Continuous improvement is the way forward.
- Full Text:
- Date Issued: 2012