The effect of new teaching methods in chemistry on the foundation certificate learners' results
- Authors: Nagel, Lilian Estelle
- Date: 2005
- Subjects: Chemistry -- Study and teaching (Higher)
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: vital:10787 , http://hdl.handle.net/10948/162 , Chemistry -- Study and teaching (Higher)
- Description: This study investigated possible alternative Chemistry teaching methods to improve the learning and thus the pass rate of the learners of access programmes at the Port Elizabeth Technikon. The study traced Chemistry learning from the Pre-Technician course to the present Science Foundation Certificate. Since the latter programme is a new course with new criteria, only implemented since the beginning of 2003, it provided a suitable platform for the evaluation and updating, if necessary, of new teaching methods. The study was limited to the subject of Chemistry. The participating learners in this qualitative research were fully informed of the objectives of this research and, for ethical reasons, their identities were protected. The methodology chosen was action research, which will include discussions regarding the choice, necessity and value of the research method. The following tools were used to collect data to determine approaches to learning and how the examination results were influenced: Questionnaires; Journal entries of students; Interviews; Data of examination results.
- Full Text:
- Date Issued: 2005
- Authors: Nagel, Lilian Estelle
- Date: 2005
- Subjects: Chemistry -- Study and teaching (Higher)
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: vital:10787 , http://hdl.handle.net/10948/162 , Chemistry -- Study and teaching (Higher)
- Description: This study investigated possible alternative Chemistry teaching methods to improve the learning and thus the pass rate of the learners of access programmes at the Port Elizabeth Technikon. The study traced Chemistry learning from the Pre-Technician course to the present Science Foundation Certificate. Since the latter programme is a new course with new criteria, only implemented since the beginning of 2003, it provided a suitable platform for the evaluation and updating, if necessary, of new teaching methods. The study was limited to the subject of Chemistry. The participating learners in this qualitative research were fully informed of the objectives of this research and, for ethical reasons, their identities were protected. The methodology chosen was action research, which will include discussions regarding the choice, necessity and value of the research method. The following tools were used to collect data to determine approaches to learning and how the examination results were influenced: Questionnaires; Journal entries of students; Interviews; Data of examination results.
- Full Text:
- Date Issued: 2005
The effect of personalised adjustments to computer workstations on the efficiency and physical comfort of computer operators
- Authors: James, Genevieve
- Date: 2005
- Subjects: Human engineering , Engineering design , Work environment , Microcomputer workstations -- Health aspects , Occupational diseases -- Prevention
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5112 , http://hdl.handle.net/10962/d1005190 , Human engineering , Engineering design , Work environment , Microcomputer workstations -- Health aspects , Occupational diseases -- Prevention
- Description: The present study sought to investigate the effects of a Standard workstation, designed for “average” users, on an anthropometrically diverse sample of computer operators, and to assess whether physical and perceptual responses, as well as performance efficiency were dependent on stature. Further investigation assessed the influence of personalised adjustments to the Standard workstation, based on the anthropometric characteristics of the subjects, as well as the introduction of a custom-designed ‘floating’ wrist support, on subject responses. All subjects (n=30) were tested in each of the three workstations: Standard, Personalised and Wrist Support. For analysis of responses in the Standard workstation, subjects were divided into three groups depending on their stature: Short (<1650mm), Medium (1650mm to 1800mm), Tall (>1800mm). The musculoskeletal responses indicated that Tall subjects were forced to adopt the most awkward general body postures as a result of the low computer screen. However, the low screen allowed for the Short subjects to adopt the most natural general body postures, although levels of muscular activity in the upper trapezius suggest that the muscular load imposed on both Short and Tall subjects was significantly greater than that imposed on the Medium subjects. In addition, the Medium subjects’ perceptions of the Standard workstation dimensions support the fact that this workstation was better suited to users with “average” morphologies. The responses elicited in the Personalised and Wrist Support workstations were improved significantly when compared to the Standard workstation. Joint angles were more natural, upper trapezius EMG was reduced, standard of performance improved and perceptual responses indicated a diminished incidence of body and visual discomfort, as well as greater perceived satisfaction with these workstation dimensions. The improved physical responses suggest a decrease in the risk of developing cumulative trauma disorders. Although subjects were unaccustomed to the wrist support device, this workstation demonstrated a further reduction in the range of wrist angles, as well as a general positive attitude towards the concept.
- Full Text:
- Date Issued: 2005
- Authors: James, Genevieve
- Date: 2005
- Subjects: Human engineering , Engineering design , Work environment , Microcomputer workstations -- Health aspects , Occupational diseases -- Prevention
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5112 , http://hdl.handle.net/10962/d1005190 , Human engineering , Engineering design , Work environment , Microcomputer workstations -- Health aspects , Occupational diseases -- Prevention
- Description: The present study sought to investigate the effects of a Standard workstation, designed for “average” users, on an anthropometrically diverse sample of computer operators, and to assess whether physical and perceptual responses, as well as performance efficiency were dependent on stature. Further investigation assessed the influence of personalised adjustments to the Standard workstation, based on the anthropometric characteristics of the subjects, as well as the introduction of a custom-designed ‘floating’ wrist support, on subject responses. All subjects (n=30) were tested in each of the three workstations: Standard, Personalised and Wrist Support. For analysis of responses in the Standard workstation, subjects were divided into three groups depending on their stature: Short (<1650mm), Medium (1650mm to 1800mm), Tall (>1800mm). The musculoskeletal responses indicated that Tall subjects were forced to adopt the most awkward general body postures as a result of the low computer screen. However, the low screen allowed for the Short subjects to adopt the most natural general body postures, although levels of muscular activity in the upper trapezius suggest that the muscular load imposed on both Short and Tall subjects was significantly greater than that imposed on the Medium subjects. In addition, the Medium subjects’ perceptions of the Standard workstation dimensions support the fact that this workstation was better suited to users with “average” morphologies. The responses elicited in the Personalised and Wrist Support workstations were improved significantly when compared to the Standard workstation. Joint angles were more natural, upper trapezius EMG was reduced, standard of performance improved and perceptual responses indicated a diminished incidence of body and visual discomfort, as well as greater perceived satisfaction with these workstation dimensions. The improved physical responses suggest a decrease in the risk of developing cumulative trauma disorders. Although subjects were unaccustomed to the wrist support device, this workstation demonstrated a further reduction in the range of wrist angles, as well as a general positive attitude towards the concept.
- Full Text:
- Date Issued: 2005
The effect of prolonged cold storage of eland (Taurotragus oryx) cauda epididymides on the spermatozoa: possible implications for the conservation of biodiversity
- Bissett, Charlene, Bernard, Ric T F
- Authors: Bissett, Charlene , Bernard, Ric T F
- Date: 2005
- Language: English
- Type: Article
- Identifier: vital:6947 , http://hdl.handle.net/10962/d1011976
- Description: The objectives of this study were to investigate the effects of prolonged storage of cauda epididymides at 4 °C on spermatozoa, and to determine the practicality of utilising epididymal sperm, harvested from testes collected during routine culling of game animals, in assisted reproductive technologies. Testes from eland (Taurotragus oryx) were collected and epididymides removed and maintained at 4 °C. Sperm motility, viability, morphology and membrane integrity were examined at 12 h intervals for 108 h. Sperm motility and viability were significantly lower at the end of the experiment than at the start (P < 0.05) and there was individual variation in the rate at which motility and viability declined. The total number of normal sperm decreased significantly with prolonged storage at 4 °C. Midpiece defects were the most common and head and tail abnormalities were rare. A significant decrease in acrosomal and nuclear membrane integrity was observed with prolonged cold storage but there was no significant change in cell membrane integrity. However, about 30% of epididymal sperm survived for 3 days at 4 °C and more than 10% survived for 4 days, and it should be possible to use sperm from culled animals in some assisted reproductive technologies.
- Full Text:
- Date Issued: 2005
- Authors: Bissett, Charlene , Bernard, Ric T F
- Date: 2005
- Language: English
- Type: Article
- Identifier: vital:6947 , http://hdl.handle.net/10962/d1011976
- Description: The objectives of this study were to investigate the effects of prolonged storage of cauda epididymides at 4 °C on spermatozoa, and to determine the practicality of utilising epididymal sperm, harvested from testes collected during routine culling of game animals, in assisted reproductive technologies. Testes from eland (Taurotragus oryx) were collected and epididymides removed and maintained at 4 °C. Sperm motility, viability, morphology and membrane integrity were examined at 12 h intervals for 108 h. Sperm motility and viability were significantly lower at the end of the experiment than at the start (P < 0.05) and there was individual variation in the rate at which motility and viability declined. The total number of normal sperm decreased significantly with prolonged storage at 4 °C. Midpiece defects were the most common and head and tail abnormalities were rare. A significant decrease in acrosomal and nuclear membrane integrity was observed with prolonged cold storage but there was no significant change in cell membrane integrity. However, about 30% of epididymal sperm survived for 3 days at 4 °C and more than 10% survived for 4 days, and it should be possible to use sperm from culled animals in some assisted reproductive technologies.
- Full Text:
- Date Issued: 2005
The effect of structure on the electrochemical properties of 14 marine pyrroloquinoline metabolites
- Antunes, Edith M, Maree, Suzanne E, Nyokong, Tebello, Davies-Coleman, Mike T, Maree, M David
- Authors: Antunes, Edith M , Maree, Suzanne E , Nyokong, Tebello , Davies-Coleman, Mike T , Maree, M David
- Date: 2005
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/286126 , vital:56242 , xlink:href="https://doi.org/10.3184/030823405775146915"
- Description: The electrochemical properties of 14 structurally related pyrroloquinoline metabolites (compounds 1–14) isolated from marine sponges were studied in pH-varied experiments using cyclic and square wave voltammetry. In general both substitution patterns and pH were observed to influence the reduction potentials of these molecules.
- Full Text:
- Date Issued: 2005
- Authors: Antunes, Edith M , Maree, Suzanne E , Nyokong, Tebello , Davies-Coleman, Mike T , Maree, M David
- Date: 2005
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/286126 , vital:56242 , xlink:href="https://doi.org/10.3184/030823405775146915"
- Description: The electrochemical properties of 14 structurally related pyrroloquinoline metabolites (compounds 1–14) isolated from marine sponges were studied in pH-varied experiments using cyclic and square wave voltammetry. In general both substitution patterns and pH were observed to influence the reduction potentials of these molecules.
- Full Text:
- Date Issued: 2005
The effects of the invasive mussel mytilus galloprovincialis and human exploitation on the indigenous mussel Perna perna on the South Coast of South Africa
- Authors: Rius Viladomiu, Marc
- Date: 2005
- Subjects: Mussels -- South Africa , Perna -- South Africa , Mytilus galloprovincialis -- South Africa , Mytilidae -- South Africa , Biological invasions , Marine resources conservation -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5684 , http://hdl.handle.net/10962/d1005370 , Mussels -- South Africa , Perna -- South Africa , Mytilus galloprovincialis -- South Africa , Mytilidae -- South Africa , Biological invasions , Marine resources conservation -- South Africa
- Description: In South Africa, the indigenous mussel Perna perna is threatened by both an invasive species and excessive human exploitation. The Mediterranean mussel Mytilus galloprovincialis is an invasive species that has been introduced to many parts of the world. In South Africa, this species arrived in the 1970s and spread rapidly along the west coast where today it is the dominant mussel species. Along the west coast, M. galloprovincialis is competitively superior in all aspects to the indigenous mussel species, and, as a result, has displaced some of them. On the south coast, M. galloprovincialis found more oligotrophic waters, higher species richness, and a stronger competitor in the indigenous mussel P. perna. The rate of spread of M. galloprovincialis along the south coast has decreased over the last 10 years and the present eastern limit of its distribution in South African is East London. On the south coast, M. galloprovincialis has not yet completely replaced P. perna; instead, the two exhibit spatial segregation, with P. perna dominating the low shore, M. galloprovincialis the high shore and an overlap zone between the two. An experiment on competition was carried out at one site on the south coast. The results showed that, on the low shore, P. perna is a more dominant competitor for space than M. galloprovincialis. Also byssus attachment of the two species differs, P. perna being much stronger than M. galloprovincialis, which suffers high mortality due to wave action on the low shore, especially in monospecific beds. As a result, mortality of M. galloprovincialis through wave action is reduced by the presence of P. perna, which seems to confer protection against dislodgement. However, in the absence of strong wave action, P. perna competitively excludes M. galloprovincialis. Human exploitation along 160 km of coast was examined by sampling mussel populations and using aerial surveys to determine where harvesters were distributed. Collectors did not seem to discriminate between species. The study has shown that higher abundances of mussels were found in protected or inaccessible sites, while in unprotected sites mussels were scarce. Coastal nature reserves are being proven to be effective in protecting mussel populations.
- Full Text:
- Date Issued: 2005
- Authors: Rius Viladomiu, Marc
- Date: 2005
- Subjects: Mussels -- South Africa , Perna -- South Africa , Mytilus galloprovincialis -- South Africa , Mytilidae -- South Africa , Biological invasions , Marine resources conservation -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5684 , http://hdl.handle.net/10962/d1005370 , Mussels -- South Africa , Perna -- South Africa , Mytilus galloprovincialis -- South Africa , Mytilidae -- South Africa , Biological invasions , Marine resources conservation -- South Africa
- Description: In South Africa, the indigenous mussel Perna perna is threatened by both an invasive species and excessive human exploitation. The Mediterranean mussel Mytilus galloprovincialis is an invasive species that has been introduced to many parts of the world. In South Africa, this species arrived in the 1970s and spread rapidly along the west coast where today it is the dominant mussel species. Along the west coast, M. galloprovincialis is competitively superior in all aspects to the indigenous mussel species, and, as a result, has displaced some of them. On the south coast, M. galloprovincialis found more oligotrophic waters, higher species richness, and a stronger competitor in the indigenous mussel P. perna. The rate of spread of M. galloprovincialis along the south coast has decreased over the last 10 years and the present eastern limit of its distribution in South African is East London. On the south coast, M. galloprovincialis has not yet completely replaced P. perna; instead, the two exhibit spatial segregation, with P. perna dominating the low shore, M. galloprovincialis the high shore and an overlap zone between the two. An experiment on competition was carried out at one site on the south coast. The results showed that, on the low shore, P. perna is a more dominant competitor for space than M. galloprovincialis. Also byssus attachment of the two species differs, P. perna being much stronger than M. galloprovincialis, which suffers high mortality due to wave action on the low shore, especially in monospecific beds. As a result, mortality of M. galloprovincialis through wave action is reduced by the presence of P. perna, which seems to confer protection against dislodgement. However, in the absence of strong wave action, P. perna competitively excludes M. galloprovincialis. Human exploitation along 160 km of coast was examined by sampling mussel populations and using aerial surveys to determine where harvesters were distributed. Collectors did not seem to discriminate between species. The study has shown that higher abundances of mussels were found in protected or inaccessible sites, while in unprotected sites mussels were scarce. Coastal nature reserves are being proven to be effective in protecting mussel populations.
- Full Text:
- Date Issued: 2005
The environmental Kuznets curve: a literature survey
- Nahman, Anton, Antrobus, Geoffrey G
- Authors: Nahman, Anton , Antrobus, Geoffrey G
- Date: 2005
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/143191 , vital:38209 , DOI: 10.1111/j.1813-6982.2005.00008.x
- Description: Literature on the environmental Kuznets curve (EKC) is examined, focussing on the possibility that the EKC may be explained by trade patterns. If significant, this trade effect would cast doubt on the oft‐stated conclusion that economic growth automatically leads to environmental improvement. Research has been insufficient, although a number of promising approaches have been developed. Although evidence on the pollution‐haven hypothesis is mixed, there is enough to suggest that the EKC development path may not be available to today's developing countries. Other problems cast doubt on whether the EKC exists in any relevant sense at all.
- Full Text:
- Date Issued: 2005
- Authors: Nahman, Anton , Antrobus, Geoffrey G
- Date: 2005
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/143191 , vital:38209 , DOI: 10.1111/j.1813-6982.2005.00008.x
- Description: Literature on the environmental Kuznets curve (EKC) is examined, focussing on the possibility that the EKC may be explained by trade patterns. If significant, this trade effect would cast doubt on the oft‐stated conclusion that economic growth automatically leads to environmental improvement. Research has been insufficient, although a number of promising approaches have been developed. Although evidence on the pollution‐haven hypothesis is mixed, there is enough to suggest that the EKC development path may not be available to today's developing countries. Other problems cast doubt on whether the EKC exists in any relevant sense at all.
- Full Text:
- Date Issued: 2005
The evaluation of a multi-modal cognitive-behavioural approach to treating an adolescent with conduct disorder
- Authors: Mashalaba, Eugenia Dudu
- Date: 2005
- Subjects: Conduct disorders in adolescence , Aggressiveness in adolescence , Violence in children , Behavior disorders in children -- Treatment , Attention-deficit disorder in adolescence , Oppositional defiant disorder in adolescence , Cognitive therapy Case studies
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3014 , http://hdl.handle.net/10962/d1002523 , Conduct disorders in adolescence , Aggressiveness in adolescence , Violence in children , Behavior disorders in children -- Treatment , Attention-deficit disorder in adolescence , Oppositional defiant disorder in adolescence , Cognitive therapy Case studies
- Description: Conduct Disorder (CD) is a repetitive and persistent pattern of behaviour in which the basic rights of others or major age-appropriate societal norms or rules are violated. It is one of the most common problems in South African schools, particularly in those that are poverty-stricken. The child who participated in the study lived in the shelter that was for homeless and disadvantaged children. He attended at Amasango School where the majority of children in the shelter attended. There were many conduct-disordered children in the shelter and the school, particularly in the school. They disrupted classes making in difficult for teachers to carry out their education activities. The aim of this study was to draw on the standard procedures of the CBT in order to design interventions that would be effective in reducing aggressive behaviour in an adolescent who had CD Adolescent-Type and who lived at the shelter. This case study evaluated the effectiveness of a multi-modal CBT programme in a 16 year-old Black male who had been displaying aggressive behaviour for about a year. The treatment consisted of 23 sessions and included teacher counseling, contingency management, self-control and self-instructional training. The treatment was evaluated qualitatively by means of interviews with the child and teacher and quantitatively by means of repeated applications of behaviour checklists completed by the teacher. The results showed a decrease in the client's aggressive behaviour and an increase in prosocial behaviour. The client ultimately ceased from all aggressive behaviour towards his peers and this outcome was sustained during his last two months in therapy.
- Full Text:
- Date Issued: 2005
- Authors: Mashalaba, Eugenia Dudu
- Date: 2005
- Subjects: Conduct disorders in adolescence , Aggressiveness in adolescence , Violence in children , Behavior disorders in children -- Treatment , Attention-deficit disorder in adolescence , Oppositional defiant disorder in adolescence , Cognitive therapy Case studies
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3014 , http://hdl.handle.net/10962/d1002523 , Conduct disorders in adolescence , Aggressiveness in adolescence , Violence in children , Behavior disorders in children -- Treatment , Attention-deficit disorder in adolescence , Oppositional defiant disorder in adolescence , Cognitive therapy Case studies
- Description: Conduct Disorder (CD) is a repetitive and persistent pattern of behaviour in which the basic rights of others or major age-appropriate societal norms or rules are violated. It is one of the most common problems in South African schools, particularly in those that are poverty-stricken. The child who participated in the study lived in the shelter that was for homeless and disadvantaged children. He attended at Amasango School where the majority of children in the shelter attended. There were many conduct-disordered children in the shelter and the school, particularly in the school. They disrupted classes making in difficult for teachers to carry out their education activities. The aim of this study was to draw on the standard procedures of the CBT in order to design interventions that would be effective in reducing aggressive behaviour in an adolescent who had CD Adolescent-Type and who lived at the shelter. This case study evaluated the effectiveness of a multi-modal CBT programme in a 16 year-old Black male who had been displaying aggressive behaviour for about a year. The treatment consisted of 23 sessions and included teacher counseling, contingency management, self-control and self-instructional training. The treatment was evaluated qualitatively by means of interviews with the child and teacher and quantitatively by means of repeated applications of behaviour checklists completed by the teacher. The results showed a decrease in the client's aggressive behaviour and an increase in prosocial behaviour. The client ultimately ceased from all aggressive behaviour towards his peers and this outcome was sustained during his last two months in therapy.
- Full Text:
- Date Issued: 2005
The experiences and needs of HIV/AIDS counsellors at a South African hospital
- Nulty, M, Edwards, David J A
- Authors: Nulty, M , Edwards, David J A
- Date: 2005
- Language: English
- Type: Article
- Identifier: vital:6269 , http://hdl.handle.net/10962/d1008268
- Description: To increase the availability of HIV/AIDS counselling in South Africa, nurses have been trained to serve as counsellors within hospital services. The aim of the study was to document the experiences and needs of nurse HIV/AIDS counsellors at a small South African hospital (with 279 beds and 10 medical doctors on the staff). The design was a qualitative, multiple-case study. The sample consisted of four nurse counsellors and the co-ordinator of HIV/AIDS services at the hospital. Three semi-structured interviews with the counsellors were used as the basis for case narratives of their experiences. These narratives were in turn subjected to content analysis to determine the range and nature of the concerns identified by the counsellors. The counsellors found their HIV/AIDS counselling work to be emotionally demanding and identified several significant problems. These were related to confidentiality, stigmatisation, motional responses to informing clients of their HIV-positive status, cultural and contextual factors and situational stressors related to the organisation of the work environment. They did not feel sufficiently supported by their work infrastructure. It is recommended that in setting up counselling services of this sort, managers need to be aware of the need for ongoing support in the form of facilitated groups, professional supervision, managerial attention to problems in the working environment, and regular in-service training.
- Full Text:
- Date Issued: 2005
- Authors: Nulty, M , Edwards, David J A
- Date: 2005
- Language: English
- Type: Article
- Identifier: vital:6269 , http://hdl.handle.net/10962/d1008268
- Description: To increase the availability of HIV/AIDS counselling in South Africa, nurses have been trained to serve as counsellors within hospital services. The aim of the study was to document the experiences and needs of nurse HIV/AIDS counsellors at a small South African hospital (with 279 beds and 10 medical doctors on the staff). The design was a qualitative, multiple-case study. The sample consisted of four nurse counsellors and the co-ordinator of HIV/AIDS services at the hospital. Three semi-structured interviews with the counsellors were used as the basis for case narratives of their experiences. These narratives were in turn subjected to content analysis to determine the range and nature of the concerns identified by the counsellors. The counsellors found their HIV/AIDS counselling work to be emotionally demanding and identified several significant problems. These were related to confidentiality, stigmatisation, motional responses to informing clients of their HIV-positive status, cultural and contextual factors and situational stressors related to the organisation of the work environment. They did not feel sufficiently supported by their work infrastructure. It is recommended that in setting up counselling services of this sort, managers need to be aware of the need for ongoing support in the form of facilitated groups, professional supervision, managerial attention to problems in the working environment, and regular in-service training.
- Full Text:
- Date Issued: 2005
The exploration of the impact of state ownership on Uganda's New Vision Newspaper's social role
- Authors: Wasswa, John Baptist
- Date: 2005
- Subjects: New Vision (Uganda) , Government and the press -- Uganda , Press and politics -- Uganda , Newspaper publishing -- Uganda
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3493 , http://hdl.handle.net/10962/d1002948 , New Vision (Uganda) , Government and the press -- Uganda , Press and politics -- Uganda , Newspaper publishing -- Uganda
- Description: The global trends of democratisation and privatisation that swept much of the developing world in the 1980s and 1990s led to significant changes in the conceptualisation, organisation and performance of the media. In Africa democratisation attained a new meaning with associated processes of liberalisation of broadcasting to end the monopoly of broadcasting by the state. The private media of the liberalised market is increasingly putting the public media system, both broadcast and print, under serious competition, and forcing them to adjust to changing circumstances. The New Vision newspaper in Uganda is one such public service media organisations that are owned by the state and yet have to compete in the new more democratic and liberalised environment. This study set out to explore the extent to which state-ownership impacts on The New Vision’s social role. Using both qualitative and quantitative methods of date collection, I have established the that although The New Vision is a public service medium for which government remains the major source of news, it does not in most cases give the state more or preferentially prominent coverage at the expense of other interest groups in society. On contrary, basing of the amount of coverage of civil society I established that The New Vision enabled the various groups public sphere to interact. The newspaper to an extent also plays the democratic role of monitoring government although there was little evidence of monitoring of corporate abuse. The nature of The New Vision Statute, and the global trends that have changed the conduct of official and private business, have rendered the theories on the 1980s’ development media theories increasingly inapplicable, forcing The New Vision to develop its own version of development journalism that is socially relevant. The study recommends that whereas much of The New Vision Statute is progressive, sections of it should be removed to protect the newspaper from being manipulated by government functionaries, if the it is to continue enabling the public sphere. The newspaper should also increase its monitoring of corporate abuse, and make internal reforms to improve the coverage of development related issues.
- Full Text:
- Date Issued: 2005
- Authors: Wasswa, John Baptist
- Date: 2005
- Subjects: New Vision (Uganda) , Government and the press -- Uganda , Press and politics -- Uganda , Newspaper publishing -- Uganda
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3493 , http://hdl.handle.net/10962/d1002948 , New Vision (Uganda) , Government and the press -- Uganda , Press and politics -- Uganda , Newspaper publishing -- Uganda
- Description: The global trends of democratisation and privatisation that swept much of the developing world in the 1980s and 1990s led to significant changes in the conceptualisation, organisation and performance of the media. In Africa democratisation attained a new meaning with associated processes of liberalisation of broadcasting to end the monopoly of broadcasting by the state. The private media of the liberalised market is increasingly putting the public media system, both broadcast and print, under serious competition, and forcing them to adjust to changing circumstances. The New Vision newspaper in Uganda is one such public service media organisations that are owned by the state and yet have to compete in the new more democratic and liberalised environment. This study set out to explore the extent to which state-ownership impacts on The New Vision’s social role. Using both qualitative and quantitative methods of date collection, I have established the that although The New Vision is a public service medium for which government remains the major source of news, it does not in most cases give the state more or preferentially prominent coverage at the expense of other interest groups in society. On contrary, basing of the amount of coverage of civil society I established that The New Vision enabled the various groups public sphere to interact. The newspaper to an extent also plays the democratic role of monitoring government although there was little evidence of monitoring of corporate abuse. The nature of The New Vision Statute, and the global trends that have changed the conduct of official and private business, have rendered the theories on the 1980s’ development media theories increasingly inapplicable, forcing The New Vision to develop its own version of development journalism that is socially relevant. The study recommends that whereas much of The New Vision Statute is progressive, sections of it should be removed to protect the newspaper from being manipulated by government functionaries, if the it is to continue enabling the public sphere. The newspaper should also increase its monitoring of corporate abuse, and make internal reforms to improve the coverage of development related issues.
- Full Text:
- Date Issued: 2005
The factors predisposing social workers to burnout in the social services organizations of the Eastern Cape
- Authors: Ramphele, Thamaga Zacharia
- Date: 2005
- Subjects: Burn out (Psychology) , Social workers -- Psychology , Job stress , Social service -- Research , Social workers -- Job stress -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSocSc
- Identifier: vital:6059 , http://hdl.handle.net/10962/d1006667 , Burn out (Psychology) , Social workers -- Psychology , Job stress , Social service -- Research , Social workers -- Job stress -- South Africa -- Eastern Cape
- Description: This work was based on an investigation of the subject of burnout, as observed by the researcher among social workers that worked for various social services organizations - both Government Departments and Non-Governmental Organizations - based in the Eastern Cape Province. The study of burnout was conducted with the aim to obtain information from the respondents about their conditions at work, and how those conditions contributed, as alleged, to burnout experienced by them. A qualitative research method was used as an approach that the researcher found best in that it allowed for an in-depth probe into the circumstances of the respondents (including the attitudes and emotions of the respondents), to give a broad picture of the situation as experienced by the respondents at work. A qualitative method was handled through the exploratory research principle of sampling and gathering of data, as the researcher felt it a sufficiently appropriate route to help yield the required outcomes of the study. The researcher's motivation to pursue the research was prompted by several indicators which included an article in the Daily Dispatch of 26 August 2003 that wrote 'Social workers quit in droves' and some personal contact with graduated students of social work, recently employed as social workers in various settings. Interesting dynamics about social work practice and its frustrations surfaced, and out of that premise, the researcher felt that it was an opportune moment to carry out an investigation to discover the facts about burnout as experienced by social workers. The findings on the research would be published, and the researcher intended to inform the social work community about the outcomes of research, hoping that the information would become useful to them in curtailing or preventing future encounters of burnout as experienced by them at the work place. In other words, recommendations for solutions would be provided based on the findings as an outcome of that investigation. To allow for the success of the research process, the researcher planned to draw from several resource centers and other researchers' data, any valuable piece of information, record, or existing data that could assist in evaluating information that became available during data collection. Such information was seen as very important since it helped in making the data analysis process easier and more than enough information could thus be obtained. Finally the researcher had found the study quite fascinating in that it addressed human concerns in the form of social work issues at work, which the researcher personally considered important and shared as one of the issues affecting social work professionals.
- Full Text:
- Date Issued: 2005
- Authors: Ramphele, Thamaga Zacharia
- Date: 2005
- Subjects: Burn out (Psychology) , Social workers -- Psychology , Job stress , Social service -- Research , Social workers -- Job stress -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSocSc
- Identifier: vital:6059 , http://hdl.handle.net/10962/d1006667 , Burn out (Psychology) , Social workers -- Psychology , Job stress , Social service -- Research , Social workers -- Job stress -- South Africa -- Eastern Cape
- Description: This work was based on an investigation of the subject of burnout, as observed by the researcher among social workers that worked for various social services organizations - both Government Departments and Non-Governmental Organizations - based in the Eastern Cape Province. The study of burnout was conducted with the aim to obtain information from the respondents about their conditions at work, and how those conditions contributed, as alleged, to burnout experienced by them. A qualitative research method was used as an approach that the researcher found best in that it allowed for an in-depth probe into the circumstances of the respondents (including the attitudes and emotions of the respondents), to give a broad picture of the situation as experienced by the respondents at work. A qualitative method was handled through the exploratory research principle of sampling and gathering of data, as the researcher felt it a sufficiently appropriate route to help yield the required outcomes of the study. The researcher's motivation to pursue the research was prompted by several indicators which included an article in the Daily Dispatch of 26 August 2003 that wrote 'Social workers quit in droves' and some personal contact with graduated students of social work, recently employed as social workers in various settings. Interesting dynamics about social work practice and its frustrations surfaced, and out of that premise, the researcher felt that it was an opportune moment to carry out an investigation to discover the facts about burnout as experienced by social workers. The findings on the research would be published, and the researcher intended to inform the social work community about the outcomes of research, hoping that the information would become useful to them in curtailing or preventing future encounters of burnout as experienced by them at the work place. In other words, recommendations for solutions would be provided based on the findings as an outcome of that investigation. To allow for the success of the research process, the researcher planned to draw from several resource centers and other researchers' data, any valuable piece of information, record, or existing data that could assist in evaluating information that became available during data collection. Such information was seen as very important since it helped in making the data analysis process easier and more than enough information could thus be obtained. Finally the researcher had found the study quite fascinating in that it addressed human concerns in the form of social work issues at work, which the researcher personally considered important and shared as one of the issues affecting social work professionals.
- Full Text:
- Date Issued: 2005
The feeding ecology and habitat use of lions reintroduced to small, enclosed reserves in the Eastern Cape Province, South Africa
- Authors: Rapson, Jackie Anne
- Date: 2005
- Subjects: Lion -- Food -- South Africa -- Eastern Cape , Lion -- Behavior -- South Africa -- Eastern Cape , Predation (Biology) , Lion -- Nutrition
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5938 , http://hdl.handle.net/10962/d1018268
- Description: Lions have recently been introduced to a number of small (<300km²), enclosed reserves in the Eastern Cape Province as a draw-card for tourists. However, there have been few studies of lion behaviour or predator prey interactions within small reserves. Thus the aim of this study is to contribute towards a better understanding of the effects of space on diet and habitat use of re-introduced lions. The research was conducted at two small private reserves, Shamwari and Kwandwe. Kills were mostly large (55%, >120kg), adult (41%) and male (39%) and the five most commonly killed species (kudu, black wildebeest, warthog, bushbuck and Blesbuck) comprised 67.9% of all kills and 67.8% of total biomass consumed. In an attempt to overcome the problem of gaps in the kill lists, a subset of data, which excluded kills more than five days apart, was analyzed and this gave similar results to analysis of the full kill lists. Mean daily intake rates varied annually between 2.26 and 5.23kg.FEQ⁻¹ for the full data set and 4.53 and 1 0.46kg.FEQ⁻¹ for the subset. The difference between estimated (calculated using daily intake rates of 5 and 7.12kg.FEQ⁻¹) and observed offtake for each ungulate species reflected the preference ratings for that species. Analysis of bone marrow indicated that: lions killed ungulates in moderate to good condition; condition of culled animals was lower than that of kills; distal bones could be used in analyses; and that that bones exposed to the environment for at least a week could be used to analyze condition of prey. Home ranges and activity centers ranged from 21.42km² to 73.27km² and 2.7lkm² to 17.47km² respectively, which was smaller than expected from previous studies. Although, lions at K wandwe and Shan1wari preferred different vegetation types, at both reserves they generally occupied areas that were structurally similar to what has previously been reported. Continuous monitoring and analyses of diet, including condition of the prey, and habitat use will provide reserve managers with some of the necessary information to enable them to effectively manage their lion populations and to predict and minimize potential problems.
- Full Text:
- Date Issued: 2005
- Authors: Rapson, Jackie Anne
- Date: 2005
- Subjects: Lion -- Food -- South Africa -- Eastern Cape , Lion -- Behavior -- South Africa -- Eastern Cape , Predation (Biology) , Lion -- Nutrition
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5938 , http://hdl.handle.net/10962/d1018268
- Description: Lions have recently been introduced to a number of small (<300km²), enclosed reserves in the Eastern Cape Province as a draw-card for tourists. However, there have been few studies of lion behaviour or predator prey interactions within small reserves. Thus the aim of this study is to contribute towards a better understanding of the effects of space on diet and habitat use of re-introduced lions. The research was conducted at two small private reserves, Shamwari and Kwandwe. Kills were mostly large (55%, >120kg), adult (41%) and male (39%) and the five most commonly killed species (kudu, black wildebeest, warthog, bushbuck and Blesbuck) comprised 67.9% of all kills and 67.8% of total biomass consumed. In an attempt to overcome the problem of gaps in the kill lists, a subset of data, which excluded kills more than five days apart, was analyzed and this gave similar results to analysis of the full kill lists. Mean daily intake rates varied annually between 2.26 and 5.23kg.FEQ⁻¹ for the full data set and 4.53 and 1 0.46kg.FEQ⁻¹ for the subset. The difference between estimated (calculated using daily intake rates of 5 and 7.12kg.FEQ⁻¹) and observed offtake for each ungulate species reflected the preference ratings for that species. Analysis of bone marrow indicated that: lions killed ungulates in moderate to good condition; condition of culled animals was lower than that of kills; distal bones could be used in analyses; and that that bones exposed to the environment for at least a week could be used to analyze condition of prey. Home ranges and activity centers ranged from 21.42km² to 73.27km² and 2.7lkm² to 17.47km² respectively, which was smaller than expected from previous studies. Although, lions at K wandwe and Shan1wari preferred different vegetation types, at both reserves they generally occupied areas that were structurally similar to what has previously been reported. Continuous monitoring and analyses of diet, including condition of the prey, and habitat use will provide reserve managers with some of the necessary information to enable them to effectively manage their lion populations and to predict and minimize potential problems.
- Full Text:
- Date Issued: 2005
The feeding ecology, habitat selection and hunting behaviour of re-introduced cheetah on Kwandwe Private Game Reserve, Eastern Cape Province
- Authors: Bissett, Charlene
- Date: 2005
- Subjects: Kwandwe Game Reserve (South Africa) , Cheetah -- Behavior -- South Africa -- Eastern Cape , Cheetah -- Nutrition -- South Africa -- Eastern Cape , Cheetah -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5698 , http://hdl.handle.net/10962/d1005384 , Kwandwe Game Reserve (South Africa) , Cheetah -- Behavior -- South Africa -- Eastern Cape , Cheetah -- Nutrition -- South Africa -- Eastern Cape , Cheetah -- South Africa -- Eastern Cape
- Description: The re-introduction of cheetah onto small reserves in the Eastern Cape Province has created the opportunity to study this species in an environment (Valley Bushveld) in which it has not previously been studied and which is quite different from the less wooded habitats in which previous studies have occurred. Thus the aim of this study is to add to the growing number of studies of cheetah in more wooded habitats and to contribute a better understanding of the level of specialization or adaptability in space use, habitat selection, diet and hunting behaviour that the cheetah possesses. The research was conducted on Kwandwe Private Game Reserve from February 2003 to August 2004. Direct observations, scat analysis and continuous observations were used to avoid bias towards large sized prey found when only using direct observations to study diet. The cheetah killed 15 species and four of the five most important prey species (kudu, springbok, grey duiker and bushbuck) were hunted according to their abundance on the reserve, while impala, the fifth most important prey species, was avoided (i.e. preference index less than one) by the cheetah. The cheetah’s main prey was medium sized ungulates, although the three male coalition killed larger prey than females and females with cubs. The daily food intake per cheetah per day was calculated to range from 5.3kg/cheetah/day for the coalition to 8kg/cheetah/day for a solitary female. Home range areas ranged from 11.1 km² for female cheetah with cubs in a den to 65.6 km² for single female cheetah and core areas ranged from 6 km² for the three male coalition to 26.5 km² for independent cubs. Habitat selection by cheetah on Kwandwe varied between the social groups depending on their susceptibility to predation by lions, their need for cover and need for water, and was similar to what has been previously reported. The home range of the coalition incorporated the most open vegetation type (karroid shrubland) with surrounding denser vegetation, while females occupied areas of denser vegetation. Activity patterns and hunting behaviour varied between different cheetah social groups with female cheetah being more active during day light hours compared to males which made 38% of their kills after dark. The average chase distances for the various cheetah groups varied considerably, and the chase distance for successful hunts was longer than for unsuccessful for all groups except single female cheetah. The percentage of kills’ kleptoparasitised on Kwandwe was very low compared to other studies possibly due to the low density of direct competitors, which in turn lead to longer mean kill retention times. These results suggest that cheetah are more adaptable than previously thought and this adaptability may have important implications for their conservation.
- Full Text:
- Date Issued: 2005
- Authors: Bissett, Charlene
- Date: 2005
- Subjects: Kwandwe Game Reserve (South Africa) , Cheetah -- Behavior -- South Africa -- Eastern Cape , Cheetah -- Nutrition -- South Africa -- Eastern Cape , Cheetah -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5698 , http://hdl.handle.net/10962/d1005384 , Kwandwe Game Reserve (South Africa) , Cheetah -- Behavior -- South Africa -- Eastern Cape , Cheetah -- Nutrition -- South Africa -- Eastern Cape , Cheetah -- South Africa -- Eastern Cape
- Description: The re-introduction of cheetah onto small reserves in the Eastern Cape Province has created the opportunity to study this species in an environment (Valley Bushveld) in which it has not previously been studied and which is quite different from the less wooded habitats in which previous studies have occurred. Thus the aim of this study is to add to the growing number of studies of cheetah in more wooded habitats and to contribute a better understanding of the level of specialization or adaptability in space use, habitat selection, diet and hunting behaviour that the cheetah possesses. The research was conducted on Kwandwe Private Game Reserve from February 2003 to August 2004. Direct observations, scat analysis and continuous observations were used to avoid bias towards large sized prey found when only using direct observations to study diet. The cheetah killed 15 species and four of the five most important prey species (kudu, springbok, grey duiker and bushbuck) were hunted according to their abundance on the reserve, while impala, the fifth most important prey species, was avoided (i.e. preference index less than one) by the cheetah. The cheetah’s main prey was medium sized ungulates, although the three male coalition killed larger prey than females and females with cubs. The daily food intake per cheetah per day was calculated to range from 5.3kg/cheetah/day for the coalition to 8kg/cheetah/day for a solitary female. Home range areas ranged from 11.1 km² for female cheetah with cubs in a den to 65.6 km² for single female cheetah and core areas ranged from 6 km² for the three male coalition to 26.5 km² for independent cubs. Habitat selection by cheetah on Kwandwe varied between the social groups depending on their susceptibility to predation by lions, their need for cover and need for water, and was similar to what has been previously reported. The home range of the coalition incorporated the most open vegetation type (karroid shrubland) with surrounding denser vegetation, while females occupied areas of denser vegetation. Activity patterns and hunting behaviour varied between different cheetah social groups with female cheetah being more active during day light hours compared to males which made 38% of their kills after dark. The average chase distances for the various cheetah groups varied considerably, and the chase distance for successful hunts was longer than for unsuccessful for all groups except single female cheetah. The percentage of kills’ kleptoparasitised on Kwandwe was very low compared to other studies possibly due to the low density of direct competitors, which in turn lead to longer mean kill retention times. These results suggest that cheetah are more adaptable than previously thought and this adaptability may have important implications for their conservation.
- Full Text:
- Date Issued: 2005
The glaciations of Wales and adjacent areas, Introduction and Chapter 8: The upper Wye and USK regions
- Lewis, Colin A, Thomas, G S P
- Authors: Lewis, Colin A , Thomas, G S P
- Date: 2005
- Language: English
- Type: Book chapter
- Identifier: vital:6727 , http://hdl.handle.net/10962/d1007160
- Description: [From the preface]: The landscapes of Wales and adjacent areas have been profoundly influenced by glaciation. Much attention has been paid to the origins of the Welsh landscape, and, especially, to its morphology. This book, like its predecessor, "The glaciations of Wales and adjoining regions", published in 1970, aims to encourage and guide further research into the glacial history of Wales and its borderlands. [From Chapter 8]: Mid-Wales was probably glaciated on at least two occasions during the Pleistocene. The glacial sediments and landforms discussed in this chapter appear to be of Late Devensian age. The scale of glaciation during the Late Devensian varied from ice-sheet to cirque glacier in size. During glaciation the mid-Wales ice-sheet shrank to become two major valley glaciers, those of the Wye and the Usk. The age of deglaciation, especially in the Wye drainage basin, is a matter for debate and much absolute dating is still needed.
- Full Text:
- Date Issued: 2005
- Authors: Lewis, Colin A , Thomas, G S P
- Date: 2005
- Language: English
- Type: Book chapter
- Identifier: vital:6727 , http://hdl.handle.net/10962/d1007160
- Description: [From the preface]: The landscapes of Wales and adjacent areas have been profoundly influenced by glaciation. Much attention has been paid to the origins of the Welsh landscape, and, especially, to its morphology. This book, like its predecessor, "The glaciations of Wales and adjoining regions", published in 1970, aims to encourage and guide further research into the glacial history of Wales and its borderlands. [From Chapter 8]: Mid-Wales was probably glaciated on at least two occasions during the Pleistocene. The glacial sediments and landforms discussed in this chapter appear to be of Late Devensian age. The scale of glaciation during the Late Devensian varied from ice-sheet to cirque glacier in size. During glaciation the mid-Wales ice-sheet shrank to become two major valley glaciers, those of the Wye and the Usk. The age of deglaciation, especially in the Wye drainage basin, is a matter for debate and much absolute dating is still needed.
- Full Text:
- Date Issued: 2005
The Grameen Bank model of microcredit and its relevance for South Africa
- Authors: Akpan, Iniobong Wilson
- Date: 2005
- Subjects: Grameen Bank , Microfinance -- South Africa , Microfinance -- Bangladesh , Credit -- Management , Risk management , Poor -- Finance, Personal , South Africa -- Economic conditions , Bangladesh -- Economic conditions
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:980 , http://hdl.handle.net/10962/d1002714 , Grameen Bank , Microfinance -- South Africa , Microfinance -- Bangladesh , Credit -- Management , Risk management , Poor -- Finance, Personal , South Africa -- Economic conditions , Bangladesh -- Economic conditions
- Description: Among the reasons for financial exclusion is the fact that the poor, being largely illiterate and unemployed, are traditionally perceived as ‘bad credit risks’. This is the dominant perception of the poor in the formal credit markets – a perception that also exists in the microcredit sector. In other words, while information asymmetry is a recognized problem in lender-borrower relationships, lenders consider the problem particularly severe when they contemplate doing business with the poor. A contrasting paradigm, such as the one adopted by Grameen Bank of Bangladesh, views the poor as possessing economic potentials that have not been tapped – that is, as ‘good credit risks’. Grameen Bank’s microcredit features appear to have successfully mitigated the problems of information asymmetry and, to a large extent, made it possible for the poor to access microenterprise credit. Using the Grameen Bank model as a benchmark, this study examined the lending features of private sector microlenders in South Africa and those of KhulaStart (credit) scheme. The aim was to identify how the lending features affect microenterprise credit access. Primary data were obtained through interviews, while relevant secondary data were also used in the study. A key finding of the study was that while the Khulastart scheme was, like Grameencredit, targeted at the poor, the method of its delivery appeared diluted or unduly influenced by the conventional (private sector) paradigm that pre-classifies people as ‘good’ or ‘bad’ credit risks. As a result, the scheme was not robust enough to support microenterprise credit access. This has consequences for job-creation and poverty reduction. Based on the findings, the study maintains that a realistic broadening of microenterprise credit access will not occur unless there is a fundamental paradigm shift in microcredit practices, and unless measures designed to mitigate information asymmetries are sensitive to the historical, economic and sociocultural realities of the South African poor.
- Full Text:
- Date Issued: 2005
- Authors: Akpan, Iniobong Wilson
- Date: 2005
- Subjects: Grameen Bank , Microfinance -- South Africa , Microfinance -- Bangladesh , Credit -- Management , Risk management , Poor -- Finance, Personal , South Africa -- Economic conditions , Bangladesh -- Economic conditions
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:980 , http://hdl.handle.net/10962/d1002714 , Grameen Bank , Microfinance -- South Africa , Microfinance -- Bangladesh , Credit -- Management , Risk management , Poor -- Finance, Personal , South Africa -- Economic conditions , Bangladesh -- Economic conditions
- Description: Among the reasons for financial exclusion is the fact that the poor, being largely illiterate and unemployed, are traditionally perceived as ‘bad credit risks’. This is the dominant perception of the poor in the formal credit markets – a perception that also exists in the microcredit sector. In other words, while information asymmetry is a recognized problem in lender-borrower relationships, lenders consider the problem particularly severe when they contemplate doing business with the poor. A contrasting paradigm, such as the one adopted by Grameen Bank of Bangladesh, views the poor as possessing economic potentials that have not been tapped – that is, as ‘good credit risks’. Grameen Bank’s microcredit features appear to have successfully mitigated the problems of information asymmetry and, to a large extent, made it possible for the poor to access microenterprise credit. Using the Grameen Bank model as a benchmark, this study examined the lending features of private sector microlenders in South Africa and those of KhulaStart (credit) scheme. The aim was to identify how the lending features affect microenterprise credit access. Primary data were obtained through interviews, while relevant secondary data were also used in the study. A key finding of the study was that while the Khulastart scheme was, like Grameencredit, targeted at the poor, the method of its delivery appeared diluted or unduly influenced by the conventional (private sector) paradigm that pre-classifies people as ‘good’ or ‘bad’ credit risks. As a result, the scheme was not robust enough to support microenterprise credit access. This has consequences for job-creation and poverty reduction. Based on the findings, the study maintains that a realistic broadening of microenterprise credit access will not occur unless there is a fundamental paradigm shift in microcredit practices, and unless measures designed to mitigate information asymmetries are sensitive to the historical, economic and sociocultural realities of the South African poor.
- Full Text:
- Date Issued: 2005
The great arch of unimagined bridges: integrative play therapy with an abused child
- Authors: McDermott, R
- Date: 2005
- Language: English
- Type: text , Article
- Identifier: vital:6272 , http://hdl.handle.net/10962/d1008272
- Description: This case study describes the early phases of integrative, long-term psychotherapy undertaken with a child subjected to chronic domestic trauma including violence, alcohol abuse, neglect, abandonment, and bereavement resulting from HIV/AIDS. Recent statistics on the prevalence of violent trauma, domestic abuse and HIV/AIDS in South Africa are reviewed, as are principles of trauma intervention that have been established across a range of psychotherapeutic modalities. Following from integrative trauma work undertaken locally, this therapeutic process acknowledges both indigenous and western frameworks of meaning, the latter most heavily informed by principles of analytical psychology. Selected aspects of the therapy are discussed in light of both perspectives, with reference to the child’s process of recovery. This paper seeks to add support to practised and published local work in which a range of possible healing practices, meanings, and experience are taken into account. It is proposed that such integrative efforts contribute towards an evolving African psychotherapy.
- Full Text:
- Date Issued: 2005
- Authors: McDermott, R
- Date: 2005
- Language: English
- Type: text , Article
- Identifier: vital:6272 , http://hdl.handle.net/10962/d1008272
- Description: This case study describes the early phases of integrative, long-term psychotherapy undertaken with a child subjected to chronic domestic trauma including violence, alcohol abuse, neglect, abandonment, and bereavement resulting from HIV/AIDS. Recent statistics on the prevalence of violent trauma, domestic abuse and HIV/AIDS in South Africa are reviewed, as are principles of trauma intervention that have been established across a range of psychotherapeutic modalities. Following from integrative trauma work undertaken locally, this therapeutic process acknowledges both indigenous and western frameworks of meaning, the latter most heavily informed by principles of analytical psychology. Selected aspects of the therapy are discussed in light of both perspectives, with reference to the child’s process of recovery. This paper seeks to add support to practised and published local work in which a range of possible healing practices, meanings, and experience are taken into account. It is proposed that such integrative efforts contribute towards an evolving African psychotherapy.
- Full Text:
- Date Issued: 2005
The historiographical development of the concept "mfecane" and the writing of early Southern African history, from the 1820s to 1920s
- Authors: Richner, Jürg Emile
- Date: 2005
- Subjects: South Africa -- History , South Africa -- Historiography , Bantu-speaking peoples -- Migrations , Africa, Southern -- History -- Mfecane period, 1816-ca. 1840
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2554 , http://hdl.handle.net/10962/d1002406 , South Africa -- History , South Africa -- Historiography , Bantu-speaking peoples -- Migrations , Africa, Southern -- History -- Mfecane period, 1816-ca. 1840
- Description: The mfecane was for most of the twentieth century regarded as a historical certainty for the South African public and the Apartheid government, as well as for historians here and world-wide. The mfecane had achieved the permanence of a paradigm and a dominant discourse, as it was accepted equally by settler, liberal, Afrikaner, Africanist and Neo-Marxist historians. This certainty was shaken when Cobbing’s mfecane critique appeared in 1988, with which I concur. This study examines how mfecane history was written from the first published articles in mid-1823 until Walker coined the concept mfecane in 1928. This thesis undertakes a journey through a host of published works, books, pamphlets and articles in journals, magazines and newspapers, from which a number of conclusions emerge. The mfecane narrative was developed over a period of a hundred years in the English language by almost exclusively white, English-speaking male amateur historians and ethnographers. Their occupations, age, ideology and level of education differed markedly, but they shared one European ideological value, the discourse of the European “Image of Africa”, which regarded Africans as the negative Other of their own positively perceived society. This was a culturallyshared view of Africans, which formed the baggage in the mind of all writers examined, and accounts for the mfecane narrative’s negative attitude towards Africans. Furthermore, mfecane history was influenced by racism and the use of literary devices such as the gothic novel and the romance. Authors writing in the 1823 to 1846 period on events which had taken place in the “blank space” beyond the Cape Colony, which most of them had never visited, laid the basis for the mfecane narrative. It constituted a set of geographical or ethnically focused, separate accounts. These separate accounts focused on the themes of Shaka’s creation of the Zulu state, including his expulsion of several chiefdoms; his depopulation of Natal and the flight of the Fingo to the Transkei; the path of destruction of the Hlubi and Ngwane during their flight from Natal via the greater Caledon Valley area to the Transkei; the incorporation of the Kololo and other Sotho chiefdoms into the Mantatees - due to pressure from the invaders from Natal - who subsequently laid waste the Free State and Transvaal as far as Dithakong, where they were defeated; the further depopulation of the Transvaal by the Ndebele during their escape from Shaka; the flight of Moshoeshoe and his people to Thaba Bosiu where he built up the Sotho state, with Moshoeshoe being the only positive figure in this history. This multi-narrative was thereafter repeated without any critical thought by all authors examined until in 1885 Theal created a Zulu-centric, geographically integrated mfecane narrative whereby he integrated the previously separate accounts into one coherent whole - a whole which was so much more than the sum of its parts, but so far without a defining name. That was provided by Walker in 1928 when he coined the Xhosa neologism, mfecane. The Theal, Cory and Walker racist mfecane was thus bequeathed as the mfecane to the rest of the twentieth century.
- Full Text:
- Date Issued: 2005
- Authors: Richner, Jürg Emile
- Date: 2005
- Subjects: South Africa -- History , South Africa -- Historiography , Bantu-speaking peoples -- Migrations , Africa, Southern -- History -- Mfecane period, 1816-ca. 1840
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2554 , http://hdl.handle.net/10962/d1002406 , South Africa -- History , South Africa -- Historiography , Bantu-speaking peoples -- Migrations , Africa, Southern -- History -- Mfecane period, 1816-ca. 1840
- Description: The mfecane was for most of the twentieth century regarded as a historical certainty for the South African public and the Apartheid government, as well as for historians here and world-wide. The mfecane had achieved the permanence of a paradigm and a dominant discourse, as it was accepted equally by settler, liberal, Afrikaner, Africanist and Neo-Marxist historians. This certainty was shaken when Cobbing’s mfecane critique appeared in 1988, with which I concur. This study examines how mfecane history was written from the first published articles in mid-1823 until Walker coined the concept mfecane in 1928. This thesis undertakes a journey through a host of published works, books, pamphlets and articles in journals, magazines and newspapers, from which a number of conclusions emerge. The mfecane narrative was developed over a period of a hundred years in the English language by almost exclusively white, English-speaking male amateur historians and ethnographers. Their occupations, age, ideology and level of education differed markedly, but they shared one European ideological value, the discourse of the European “Image of Africa”, which regarded Africans as the negative Other of their own positively perceived society. This was a culturallyshared view of Africans, which formed the baggage in the mind of all writers examined, and accounts for the mfecane narrative’s negative attitude towards Africans. Furthermore, mfecane history was influenced by racism and the use of literary devices such as the gothic novel and the romance. Authors writing in the 1823 to 1846 period on events which had taken place in the “blank space” beyond the Cape Colony, which most of them had never visited, laid the basis for the mfecane narrative. It constituted a set of geographical or ethnically focused, separate accounts. These separate accounts focused on the themes of Shaka’s creation of the Zulu state, including his expulsion of several chiefdoms; his depopulation of Natal and the flight of the Fingo to the Transkei; the path of destruction of the Hlubi and Ngwane during their flight from Natal via the greater Caledon Valley area to the Transkei; the incorporation of the Kololo and other Sotho chiefdoms into the Mantatees - due to pressure from the invaders from Natal - who subsequently laid waste the Free State and Transvaal as far as Dithakong, where they were defeated; the further depopulation of the Transvaal by the Ndebele during their escape from Shaka; the flight of Moshoeshoe and his people to Thaba Bosiu where he built up the Sotho state, with Moshoeshoe being the only positive figure in this history. This multi-narrative was thereafter repeated without any critical thought by all authors examined until in 1885 Theal created a Zulu-centric, geographically integrated mfecane narrative whereby he integrated the previously separate accounts into one coherent whole - a whole which was so much more than the sum of its parts, but so far without a defining name. That was provided by Walker in 1928 when he coined the Xhosa neologism, mfecane. The Theal, Cory and Walker racist mfecane was thus bequeathed as the mfecane to the rest of the twentieth century.
- Full Text:
- Date Issued: 2005
The identification of a model to promote intrapreneurship in an automotive component company
- Authors: Du Preez, Catherine Amanda
- Date: 2005
- Subjects: Entrepreneurship , Automobile industry and trade -- South Africa , Organizational change
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8549 , http://hdl.handle.net/10948/423 , Entrepreneurship , Automobile industry and trade -- South Africa , Organizational change
- Description: South African organisations are facing a new era of intense global competition. The modern business world is characterised by change and this change presents both challenges and opportunities. As a result, organisations have to become more responsive to change by continuous, rapid and cost-effective innovation through integrating the strengths of the entrepreneurial small firm, such as creativity, flexibility and innovativeness, with the market power and resources of the large firm. Due to the dynamic nature of the automotive industry, it is vital that South African organisations and management identify creativity and innovation as the main sources of sustainable competitive advantage. Sustained competitive advantage is derived from consistently satisfying customers’ wants and needs through innovation. An intrapreneurial philosophy is of key importance to an organisation’s corporate strategy, ensuring that entrepreneurial values are incorporated into the culture of the organisation. This study took place within an automotive component company operating in the Eastern Cape. Based on the theoretical findings of the literature study a questionnaire was developed and distributed to all employees of the company. The objective of the questionnaire was to measure the prevalence of intrapreneurship within the company and based on the findings of the literature study, recommendations on the structure, systems, culture and management styles of the organisation were made. Finally, a model was developed that identifies the importance of innovation, customer-solution centeredness and being market driven as core strategic values.
- Full Text:
- Date Issued: 2005
- Authors: Du Preez, Catherine Amanda
- Date: 2005
- Subjects: Entrepreneurship , Automobile industry and trade -- South Africa , Organizational change
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8549 , http://hdl.handle.net/10948/423 , Entrepreneurship , Automobile industry and trade -- South Africa , Organizational change
- Description: South African organisations are facing a new era of intense global competition. The modern business world is characterised by change and this change presents both challenges and opportunities. As a result, organisations have to become more responsive to change by continuous, rapid and cost-effective innovation through integrating the strengths of the entrepreneurial small firm, such as creativity, flexibility and innovativeness, with the market power and resources of the large firm. Due to the dynamic nature of the automotive industry, it is vital that South African organisations and management identify creativity and innovation as the main sources of sustainable competitive advantage. Sustained competitive advantage is derived from consistently satisfying customers’ wants and needs through innovation. An intrapreneurial philosophy is of key importance to an organisation’s corporate strategy, ensuring that entrepreneurial values are incorporated into the culture of the organisation. This study took place within an automotive component company operating in the Eastern Cape. Based on the theoretical findings of the literature study a questionnaire was developed and distributed to all employees of the company. The objective of the questionnaire was to measure the prevalence of intrapreneurship within the company and based on the findings of the literature study, recommendations on the structure, systems, culture and management styles of the organisation were made. Finally, a model was developed that identifies the importance of innovation, customer-solution centeredness and being market driven as core strategic values.
- Full Text:
- Date Issued: 2005
The labour market drop-out rate : a new approach to estimating the returns to government investment in higher education : the case for marine science in South Africa
- Authors: Grootes, Pieter Brian
- Date: 2005
- Subjects: Labor market Marine scientists -- South Africa Education -- Economic aspects -- South Africa Higher education and state -- South Africa Education -- Social aspects Human capital -- South Africa Education, Higher -- Economic aspects -- South Africa
- Language: English
- Type: Thesis , Masters , MEcon
- Identifier: vital:950 , http://hdl.handle.net/10962/d1002684
- Description: The private and social returns to education literature share the same conclusion: that education is beneficial for both the individual and society. However, the theoretical underpinnings are flawed as the literature does not account for the main feature that leads to the acquisition of education: the private demand for education. An understanding of the factors that motivate the individual to invest in education would lead to a deeper insight as to why both private and social returns to education exist, and would provide a clearer framework on which to base the government funding of education. This thesis provides a first attempt at filling this gap by introducing a method of estimating the returns to government investment in education, which is labelled the ‘labour market drop-out rate approach’. The approach focuses on the social return to education, not in terms of graduate earnings, but in terms of the interaction of the graduate with the economy. The approach introduces a measure of expertise utilisation, based on the premise that there is no social return to an individual acquiring education if he or she does not utilise the acquired knowledge base on entering the labour market. The approach is tested using the labour market for marine scientists in South Africa as a case study. In this case the private demand for education is found to be heavily influenced by the provision of student bursaries from the National Research Foundation, with a resulting estimate of the social return to a degree in marine science being a mere 20% to 25%. Owing to this, a new approach to government investment in marine science is introduced, that of graduate contribution schemes. Of broader significance is the ease of application of this approach, it may be adopted to analyse any funding programme in which a government may decide to invest. As such, the labour market drop-out rate provides an extension to the returns to education literature through its theoretical dealings of the private demand for education, as well as a practical tool which government agencies can use to evaluate the efficacy of any government funding of education.
- Full Text:
- Date Issued: 2005
- Authors: Grootes, Pieter Brian
- Date: 2005
- Subjects: Labor market Marine scientists -- South Africa Education -- Economic aspects -- South Africa Higher education and state -- South Africa Education -- Social aspects Human capital -- South Africa Education, Higher -- Economic aspects -- South Africa
- Language: English
- Type: Thesis , Masters , MEcon
- Identifier: vital:950 , http://hdl.handle.net/10962/d1002684
- Description: The private and social returns to education literature share the same conclusion: that education is beneficial for both the individual and society. However, the theoretical underpinnings are flawed as the literature does not account for the main feature that leads to the acquisition of education: the private demand for education. An understanding of the factors that motivate the individual to invest in education would lead to a deeper insight as to why both private and social returns to education exist, and would provide a clearer framework on which to base the government funding of education. This thesis provides a first attempt at filling this gap by introducing a method of estimating the returns to government investment in education, which is labelled the ‘labour market drop-out rate approach’. The approach focuses on the social return to education, not in terms of graduate earnings, but in terms of the interaction of the graduate with the economy. The approach introduces a measure of expertise utilisation, based on the premise that there is no social return to an individual acquiring education if he or she does not utilise the acquired knowledge base on entering the labour market. The approach is tested using the labour market for marine scientists in South Africa as a case study. In this case the private demand for education is found to be heavily influenced by the provision of student bursaries from the National Research Foundation, with a resulting estimate of the social return to a degree in marine science being a mere 20% to 25%. Owing to this, a new approach to government investment in marine science is introduced, that of graduate contribution schemes. Of broader significance is the ease of application of this approach, it may be adopted to analyse any funding programme in which a government may decide to invest. As such, the labour market drop-out rate provides an extension to the returns to education literature through its theoretical dealings of the private demand for education, as well as a practical tool which government agencies can use to evaluate the efficacy of any government funding of education.
- Full Text:
- Date Issued: 2005
The learning styles of first year university students
- Authors: Vawda, Aamena
- Date: 2005
- Subjects: Learning, Psychology of , College students -- South Africa -- Evaluation , Learning ability
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9849 , http://hdl.handle.net/10948/358 , http://hdl.handle.net/10948/d1005817 , Learning, Psychology of , College students -- South Africa -- Evaluation , Learning ability
- Description: There has been a shift in the South African education system from a purely grade-oriented system to that of a learner-centred outcome-based system of education which challenges higher educational institutions and their faculties to adjust their goals to this system. In South Africa there is evidence of poor academic performance at higher education institutions. Among other things, noncognitive factors may be important mediators of academic success. With the expansion of higher education and the increased emphasis on access, retention and life-long learning, it is a good reason to explore the nature of different learning styles (Healey & Jenkins, 2000). Learning styles and personality types has been identified as significant predictors of academic performance. The present study aimed to contribute to this body of research in general and to Kolb’s (1981) theory of experiential learning and his conceptualisation of learning styles in particular. The aims of the study were to explore and describe the learning styles of first year university students (Aim 1), to explore and describe the learning styles of first year university students per faculty (Aim 2), and to explore the relationship between learning styles and academic performance for students in the various faculties (Aim 3). The study used an explorative descriptive and correlational research method and was conducted within a quantitative framework. Participants were selected using a non-probability convenience sampling technique. The sample was comprised of 391 first year university students to whom Kolb’s Learning Style Indicator was administered as part of the Explore programme during orientation week. Descriptive statistics were used in order to explore and describe the learning style of the learners for the sample as a whole and per faculty. Data for the learning styles and academic performance categories were cross tabulated so as to comment on the relationship between learning styles and academic performance per faculty. Small cell sizes made it impossible to analyse the latter data statistically. Across the six faculties the Accommodator learning style was the most represented, followed by the Diverger learning style. No significant relationship was found between learning styles and academic performance. The implications of the findings for counselling and teaching students are highlighted and suggestions to expand the research through using larger samples are also made.
- Full Text:
- Date Issued: 2005
- Authors: Vawda, Aamena
- Date: 2005
- Subjects: Learning, Psychology of , College students -- South Africa -- Evaluation , Learning ability
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9849 , http://hdl.handle.net/10948/358 , http://hdl.handle.net/10948/d1005817 , Learning, Psychology of , College students -- South Africa -- Evaluation , Learning ability
- Description: There has been a shift in the South African education system from a purely grade-oriented system to that of a learner-centred outcome-based system of education which challenges higher educational institutions and their faculties to adjust their goals to this system. In South Africa there is evidence of poor academic performance at higher education institutions. Among other things, noncognitive factors may be important mediators of academic success. With the expansion of higher education and the increased emphasis on access, retention and life-long learning, it is a good reason to explore the nature of different learning styles (Healey & Jenkins, 2000). Learning styles and personality types has been identified as significant predictors of academic performance. The present study aimed to contribute to this body of research in general and to Kolb’s (1981) theory of experiential learning and his conceptualisation of learning styles in particular. The aims of the study were to explore and describe the learning styles of first year university students (Aim 1), to explore and describe the learning styles of first year university students per faculty (Aim 2), and to explore the relationship between learning styles and academic performance for students in the various faculties (Aim 3). The study used an explorative descriptive and correlational research method and was conducted within a quantitative framework. Participants were selected using a non-probability convenience sampling technique. The sample was comprised of 391 first year university students to whom Kolb’s Learning Style Indicator was administered as part of the Explore programme during orientation week. Descriptive statistics were used in order to explore and describe the learning style of the learners for the sample as a whole and per faculty. Data for the learning styles and academic performance categories were cross tabulated so as to comment on the relationship between learning styles and academic performance per faculty. Small cell sizes made it impossible to analyse the latter data statistically. Across the six faculties the Accommodator learning style was the most represented, followed by the Diverger learning style. No significant relationship was found between learning styles and academic performance. The implications of the findings for counselling and teaching students are highlighted and suggestions to expand the research through using larger samples are also made.
- Full Text:
- Date Issued: 2005
The life history patterns of the polychaete, Terebrasabella heterouncinata, a pest of cultured abalone
- Authors: Simon, Carol Anne
- Date: 2005
- Subjects: Polychaeta -- Physiology Sabellidae -- Physiology Abalones -- Diseases Polychaeta -- Reproduction Sabellidae -- Reproduction Abalone culture -- South Africa
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:5336 , http://hdl.handle.net/10962/d1005632
- Description: Terebrasabella heterouncinata is a small K-selected sabellid polychaete. It is a simultaneous hermaphrodite with a semi-continuous mode of reproduction, producing relatively few large eggs that are brooded within the parental burrow until the larvae emerge, to settle on the growing edge of the abalone shell. Despite its low fecundity, this worm has become problematic on abalone farms in South Africa. The present study was conducted to gain an understanding of the life history patterns of T. helerouncinata to determine how they contributed to the success of these worms under altered conditions. This study demonstrated that conditions prevalent on abalone farms were conducive to enhancing the reproductive success of this worm, and suggests that larger, more fecund worms may have been selected for in the decade that these worms have been present on the farms. Increased nutrient availability, and possibly the increased stability of the farm environment relative to its natural environment, has led to a 1.5-fold increase in the average size of the worms. Body size was found to be positively correlated with brood size, and this resulted in worms on farms brooding 3 to 4.5 times more offspring at a time than worms from wild abalone. The ability to increase the number of eggs produced at a time may have been limited by the fact that these worms have only two ovaries. Thus, the increase in fecundity may have been related primarily to the increase in the rate at which the eggs were laid by the worms on the farms, and the increase in the coelomic space available for the storage of these rapidly developing eggs. The ability to increase the rate at which oocytes develop may be related to the vitellogenic mechanisms employed by these worms. Vitellogenic oocytes are able to incorporate high molecular weight yolk precursors from the surrounding coelomic fluid through endocytotic activity. This may allow the oocytes to increase the rate at which they incorporate yolk material under conditions of nutrient enrichment. The increase in fecundity did not occur at the expense of offspring size and, presumably, quality. The increased reproductive output on the farms was compounded by a proportionate increase in the number of reproducing worms within the population. In addition, these worms are long-lived (worms from farmed abalone reached a maximum age of approximately 40 months) and exhibit negligible senescence. Thus, their reproductive output did not change significantly with an increase in age. Furthermore, the proportion of the reproductive worms did not decrease with an increase in age. Thus, within the age range tested, worms of all ages have the potential to make equal contributions to population growth. While diet and abalone stocking density could not be identified as having a significant effect on reproductive output and infestation rate under intensive culture conditions, it was demonstrated that in a naïve abalone population, the total intensity of infestation increased exponentially with time. This increase may be a consequence of an increase in fertilisation success. These worms continuously produce entaquasperm that are released into the water column. The sperm are collected by other individuals that then store the sperm in a single spermatheca. The ability to store sperm relieves individuals of a dependence on the synchronisation of spawning of eggs and sperm. As the population size and density increases, there could be more individuals releasing sperm into the water column, resulting in a continuous supply of sperm. The increased production of eggs would therefore not be constrained by a lack of sperm. The stored sperm are released into the brood chamber to fertilise eggs as they are laid, and this would probably increase the fertilisation success in the species. This study also provides evidence to suggest that reproduction in this worm has a seasonal component. Future studies should concentrate on measuring fertilisation success in greater detail, measuring the effect of season on reproduction, determining whether there are genetic differences between worms on farmed and wild abalone and determining whether wild worms have similar life-spans and age-related fecundity as worms on farms.
- Full Text:
- Date Issued: 2005
- Authors: Simon, Carol Anne
- Date: 2005
- Subjects: Polychaeta -- Physiology Sabellidae -- Physiology Abalones -- Diseases Polychaeta -- Reproduction Sabellidae -- Reproduction Abalone culture -- South Africa
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:5336 , http://hdl.handle.net/10962/d1005632
- Description: Terebrasabella heterouncinata is a small K-selected sabellid polychaete. It is a simultaneous hermaphrodite with a semi-continuous mode of reproduction, producing relatively few large eggs that are brooded within the parental burrow until the larvae emerge, to settle on the growing edge of the abalone shell. Despite its low fecundity, this worm has become problematic on abalone farms in South Africa. The present study was conducted to gain an understanding of the life history patterns of T. helerouncinata to determine how they contributed to the success of these worms under altered conditions. This study demonstrated that conditions prevalent on abalone farms were conducive to enhancing the reproductive success of this worm, and suggests that larger, more fecund worms may have been selected for in the decade that these worms have been present on the farms. Increased nutrient availability, and possibly the increased stability of the farm environment relative to its natural environment, has led to a 1.5-fold increase in the average size of the worms. Body size was found to be positively correlated with brood size, and this resulted in worms on farms brooding 3 to 4.5 times more offspring at a time than worms from wild abalone. The ability to increase the number of eggs produced at a time may have been limited by the fact that these worms have only two ovaries. Thus, the increase in fecundity may have been related primarily to the increase in the rate at which the eggs were laid by the worms on the farms, and the increase in the coelomic space available for the storage of these rapidly developing eggs. The ability to increase the rate at which oocytes develop may be related to the vitellogenic mechanisms employed by these worms. Vitellogenic oocytes are able to incorporate high molecular weight yolk precursors from the surrounding coelomic fluid through endocytotic activity. This may allow the oocytes to increase the rate at which they incorporate yolk material under conditions of nutrient enrichment. The increase in fecundity did not occur at the expense of offspring size and, presumably, quality. The increased reproductive output on the farms was compounded by a proportionate increase in the number of reproducing worms within the population. In addition, these worms are long-lived (worms from farmed abalone reached a maximum age of approximately 40 months) and exhibit negligible senescence. Thus, their reproductive output did not change significantly with an increase in age. Furthermore, the proportion of the reproductive worms did not decrease with an increase in age. Thus, within the age range tested, worms of all ages have the potential to make equal contributions to population growth. While diet and abalone stocking density could not be identified as having a significant effect on reproductive output and infestation rate under intensive culture conditions, it was demonstrated that in a naïve abalone population, the total intensity of infestation increased exponentially with time. This increase may be a consequence of an increase in fertilisation success. These worms continuously produce entaquasperm that are released into the water column. The sperm are collected by other individuals that then store the sperm in a single spermatheca. The ability to store sperm relieves individuals of a dependence on the synchronisation of spawning of eggs and sperm. As the population size and density increases, there could be more individuals releasing sperm into the water column, resulting in a continuous supply of sperm. The increased production of eggs would therefore not be constrained by a lack of sperm. The stored sperm are released into the brood chamber to fertilise eggs as they are laid, and this would probably increase the fertilisation success in the species. This study also provides evidence to suggest that reproduction in this worm has a seasonal component. Future studies should concentrate on measuring fertilisation success in greater detail, measuring the effect of season on reproduction, determining whether there are genetic differences between worms on farmed and wild abalone and determining whether wild worms have similar life-spans and age-related fecundity as worms on farms.
- Full Text:
- Date Issued: 2005