Genetic structure and biogeography of three wrasse species (Labridae) within the Western Indian Ocean
- Authors: Mayekiso, Sisanda
- Date: 2016
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/1114 , vital:20021
- Description: The biogeography of wrasses within the Western Indian Ocean (WIO) is poorly understood, with regard to origins and genetic differentiation or connectivity among the regions of the WIO. This region is a good model for studying the influence of physical complexities and biogeographic breaks in shaping patterns of differentiation in wrasses. Three reef-associated fish species, Cheilio inermis, Thalassoma hebraicum and T. lunare, were selected to examine the factors that have influenced patterns of differentiation across the WIO. Each species was sampled from various localities of the WIO, the Red Sea and Indo-West Pacific Islands. Sequence data were generated from two mitochondrial gene fragments (cytochrome b and ATPase 6) and one nuclear locus (the first intron of the ribosomal protein S7 gene). Genetic analyses were used to calculate genetic diversity indices within species, which were then compared among species. The relationships among haplotypes and alleles were constructed using median-joining networks. Where necessary, neighbour-joining trees (NJ) were constructed to examine relationships among haplotypes and alleles for the Thalassoma species. Population structure was analysed using AMOVA and pairwise ФST to compare and calculate differentiation between the WIO localities. Mismatch distributions were used to examine population growth and decline or stability, and demographic parameters were used to calculate time of population expansion. There was high haplotype (h = 0.88 to 0.98) and low nucleotide diversities (π = 0.003 to 0.008) among all species for mitochondrial markers. For S7 intron I, high allelic (A = 0.95 to 0.98) and low nucleotide diversities (π = 0.002 to 0.014) were observed for all species. The pairwise ФST values revealed little to great (ФST = -0.02 to 0.67) genetic differentiation between localities, across all species for the three gene regions. The pairwise comparisons indicated the differentiation in C. inermis of Tanzania and Kenya from Mozambique and Nosy Be (Madagascar). The widespread C. inermis also revealed the differentiation of Kenya and Tanzania. For C. inermis, the AMOVAs of ATPase 6 and cytochrome b data indicated high differentiation among defined locality groups. The groups were defined according to geographic proximity. However, the AMOVA of the nuclear gene (S7 intron I) did not find variation among defined locality groups. Cheilio inermis revealed a sequence divergence of 0.4%. The divergence that was found in C. inermis was not enough to suggest a cryptic species within the WIO. Overall, the widespread and monotypic C. inermis revealed genetic differentiation within the WIO. Thalassoma hebraicum generally revealed little genetic differentiation across the WIO. The AMOVAs of the three gene regions showed no variation among specimens of the defined locality groups. However, some differentiation was found between localities. The pairwise comparisons of T. hebraicum revealed the differentiation of Seychelles from the African mainland and Madagascar. Southern Africa was observed to be differentiated from Nosy Be and Zanzibar. The observed differentiation could be caused by oceanic barriers such as the South Equatorial Current (SEQC), East African Coastal Current (EACC), and the Comoros Gyres and eddies in the Mozambique Channel, and Agulhas Current. Thalassoma lunare revealed genetic isolation between the WIO and the Red Sea as well as within the WIO. The genetic isolation between the WIO and the Red Sea is probably due to the historical isolation by the Bab al Mandab and contemporary barriers such as the cold upwelling cells in Somalia. The differentiation of Maldives from the African mainland and Seychelles could be due to distance and the upwelling cells created by monsoon winds. Mismatch distributions suggested that C. inermis and T. hebraicum had undergone demographic expansion during the Pleistocene (92 678 to 40 219 years ago). The results of the current study are similar to those from previous studies of WIO reef fish species, and the results of the present study could have potential implications for conservation and fisheries management. Single genetic markers and single species studies do not detect all barriers to dispersal in the WIO, thus they are insufficient to inform conservation management. Thus, the use of multispecies and genetic markers in the current study can be adopted by other studies of the marine taxa of the WIO.
- Full Text:
- Authors: Mayekiso, Sisanda
- Date: 2016
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/1114 , vital:20021
- Description: The biogeography of wrasses within the Western Indian Ocean (WIO) is poorly understood, with regard to origins and genetic differentiation or connectivity among the regions of the WIO. This region is a good model for studying the influence of physical complexities and biogeographic breaks in shaping patterns of differentiation in wrasses. Three reef-associated fish species, Cheilio inermis, Thalassoma hebraicum and T. lunare, were selected to examine the factors that have influenced patterns of differentiation across the WIO. Each species was sampled from various localities of the WIO, the Red Sea and Indo-West Pacific Islands. Sequence data were generated from two mitochondrial gene fragments (cytochrome b and ATPase 6) and one nuclear locus (the first intron of the ribosomal protein S7 gene). Genetic analyses were used to calculate genetic diversity indices within species, which were then compared among species. The relationships among haplotypes and alleles were constructed using median-joining networks. Where necessary, neighbour-joining trees (NJ) were constructed to examine relationships among haplotypes and alleles for the Thalassoma species. Population structure was analysed using AMOVA and pairwise ФST to compare and calculate differentiation between the WIO localities. Mismatch distributions were used to examine population growth and decline or stability, and demographic parameters were used to calculate time of population expansion. There was high haplotype (h = 0.88 to 0.98) and low nucleotide diversities (π = 0.003 to 0.008) among all species for mitochondrial markers. For S7 intron I, high allelic (A = 0.95 to 0.98) and low nucleotide diversities (π = 0.002 to 0.014) were observed for all species. The pairwise ФST values revealed little to great (ФST = -0.02 to 0.67) genetic differentiation between localities, across all species for the three gene regions. The pairwise comparisons indicated the differentiation in C. inermis of Tanzania and Kenya from Mozambique and Nosy Be (Madagascar). The widespread C. inermis also revealed the differentiation of Kenya and Tanzania. For C. inermis, the AMOVAs of ATPase 6 and cytochrome b data indicated high differentiation among defined locality groups. The groups were defined according to geographic proximity. However, the AMOVA of the nuclear gene (S7 intron I) did not find variation among defined locality groups. Cheilio inermis revealed a sequence divergence of 0.4%. The divergence that was found in C. inermis was not enough to suggest a cryptic species within the WIO. Overall, the widespread and monotypic C. inermis revealed genetic differentiation within the WIO. Thalassoma hebraicum generally revealed little genetic differentiation across the WIO. The AMOVAs of the three gene regions showed no variation among specimens of the defined locality groups. However, some differentiation was found between localities. The pairwise comparisons of T. hebraicum revealed the differentiation of Seychelles from the African mainland and Madagascar. Southern Africa was observed to be differentiated from Nosy Be and Zanzibar. The observed differentiation could be caused by oceanic barriers such as the South Equatorial Current (SEQC), East African Coastal Current (EACC), and the Comoros Gyres and eddies in the Mozambique Channel, and Agulhas Current. Thalassoma lunare revealed genetic isolation between the WIO and the Red Sea as well as within the WIO. The genetic isolation between the WIO and the Red Sea is probably due to the historical isolation by the Bab al Mandab and contemporary barriers such as the cold upwelling cells in Somalia. The differentiation of Maldives from the African mainland and Seychelles could be due to distance and the upwelling cells created by monsoon winds. Mismatch distributions suggested that C. inermis and T. hebraicum had undergone demographic expansion during the Pleistocene (92 678 to 40 219 years ago). The results of the current study are similar to those from previous studies of WIO reef fish species, and the results of the present study could have potential implications for conservation and fisheries management. Single genetic markers and single species studies do not detect all barriers to dispersal in the WIO, thus they are insufficient to inform conservation management. Thus, the use of multispecies and genetic markers in the current study can be adopted by other studies of the marine taxa of the WIO.
- Full Text:
Tug of war : a critical discourse analysis of Punch and Daily Trust newspapers' coverage of polio eradication in Nigeria
- Authors: Oyewo, Ayanfeoluwa Olutosin
- Date: 2015
- Subjects: Punch (Nigeria) , Daily Trust (Nigeria) , Poliomyelitis -- Nigeria , Communication in medicine -- Nigeria , Journalism -- Political aspects -- Nigeria , Journalistic ethics -- Nigeria , Journalism -- Objectivity -- Nigeria , Critical discourse analysis
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3546 , http://hdl.handle.net/10962/d1017787
- Description: The resurgence of the polio virus in Nigeria following vaccine rejections poses a severe threat to the total worldwide eradication of polio. Vaccine refusals are a huge problem in Nigeria, especially in the North, which accounts for about 60 percent of polio cases in 2013. These refusals were informed by claims that polio vaccines contained anti-fertility properties that were designed by the ‘West’ to reduce the Muslim population. These claims and subsequent vaccine rejections culminated in the killing of health workers during an immunisation exercise in February 2013. This study is an analysis of the coverage of the polio eradication controversy by two newspapers- Punch and Daily Trust, following the killings of the health workers. Daily Trust is situated in Northern Nigeria, while Punch is situated in the South. The choice of these newspapers is based on the argument by Ayodele (1988) and Omenugha (2004) that the Nigerian press has been accused of escalating tension in the country because they view many aspects of the Nigerian reality from the lenses of religious, political and cultural prejudices. Because it is a text-based study, the chosen research method is Fairclough’s (1995) model of Critical Discourse Analysis (CDA), following a preliminary thematic content analysis. In addition to Fairclough’s model, the study employs textual analytic tools such as narrative analysis and rhetoric/argumentative analysis. The selected texts, which comprise editorials and news stories are analysed based on the themes identified during the thematic content analysis. The study concludes that while the two newspapers differ in their locations and stylistic approach to news, they are similar in their coverage of the polio eradication crisis. They both side with the Federal Government and help perpetuate the South versus North animosity thereby ignoring the intricacies involved in the polio eradication controversy.
- Full Text:
- Authors: Oyewo, Ayanfeoluwa Olutosin
- Date: 2015
- Subjects: Punch (Nigeria) , Daily Trust (Nigeria) , Poliomyelitis -- Nigeria , Communication in medicine -- Nigeria , Journalism -- Political aspects -- Nigeria , Journalistic ethics -- Nigeria , Journalism -- Objectivity -- Nigeria , Critical discourse analysis
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3546 , http://hdl.handle.net/10962/d1017787
- Description: The resurgence of the polio virus in Nigeria following vaccine rejections poses a severe threat to the total worldwide eradication of polio. Vaccine refusals are a huge problem in Nigeria, especially in the North, which accounts for about 60 percent of polio cases in 2013. These refusals were informed by claims that polio vaccines contained anti-fertility properties that were designed by the ‘West’ to reduce the Muslim population. These claims and subsequent vaccine rejections culminated in the killing of health workers during an immunisation exercise in February 2013. This study is an analysis of the coverage of the polio eradication controversy by two newspapers- Punch and Daily Trust, following the killings of the health workers. Daily Trust is situated in Northern Nigeria, while Punch is situated in the South. The choice of these newspapers is based on the argument by Ayodele (1988) and Omenugha (2004) that the Nigerian press has been accused of escalating tension in the country because they view many aspects of the Nigerian reality from the lenses of religious, political and cultural prejudices. Because it is a text-based study, the chosen research method is Fairclough’s (1995) model of Critical Discourse Analysis (CDA), following a preliminary thematic content analysis. In addition to Fairclough’s model, the study employs textual analytic tools such as narrative analysis and rhetoric/argumentative analysis. The selected texts, which comprise editorials and news stories are analysed based on the themes identified during the thematic content analysis. The study concludes that while the two newspapers differ in their locations and stylistic approach to news, they are similar in their coverage of the polio eradication crisis. They both side with the Federal Government and help perpetuate the South versus North animosity thereby ignoring the intricacies involved in the polio eradication controversy.
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How does security limit the right to protest? : a study examining the securitised response to protest in South Africa
- Authors: Royeppen, Andrea Leigh
- Date: 2014
- Subjects: Protest movements -- South Africa , Political violence -- South Africa , South Africa -- Politics and government -- 21st century , Civil rights -- South Africa , Police power -- South Africa , Abuse of administrative power -- South Africa , Police -- Complaints against -- South Africa , Right to strike -- South Africa , Democracy -- South Africa , Political leadership -- South Africa -- 21st century , Political participation -- South Africa , African National Congress , South African Police Service
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2878 , http://hdl.handle.net/10962/d1013071
- Description: In South Africa, the right to protest is under constant threat as a result of the state response. Increasing cases of forceful policing and sometimes unlawful procedural prohibitions of protest attest to this. This study aims to firstly describe this situation through securitisation theory, essentially arguing that South Africa has become a securitised state. It also aims to understand how this is sustained by the state and why the state needs to use a securitised response to maintain power. Interviews were conducted with members of different communities and organisations. Their responses helped to illustrate the frustration of the right to protest or brutal policing during a protest. This provided primary evidence to support the claims of the study. The research shows that claims to protest are being delegitimised under the guise of security as protestors are being constructed as threats to the state. This is further substantiated by looking at how the reorganisation and remililtarisation of the South African Police perpetuates the criminalisation of protestors which necessitates a forceful response from the state. Furthermore, it shows that there is a distinct relationship between the prohibition of protest and the recent increase in ‘violent’ protests which legitimate forceful policing thereby creating a state sustained cycle of violence. The larger implication of this treatment is that these protestors are treated as non- citizens who are definitively excluded from participating in governance. In understanding why this is taking place, it is clear that a securtitised response is an attempt to maintain power by dispelling any threats to power, a response which is seen to have a long history in the African National Congress (ANC) when examining the politics of the ANC during exile. Maintaining power in this way distracts from the larger agenda of the state, which this thesis argues, is to mask the unraveling of the ANC’s hegemony and inability to maintain national unity. In other words, the increasing dissatisfaction of some of the citizenry which has manifested through protest greatly undermines the legitimacy of the government to provide for its people.
- Full Text:
- Authors: Royeppen, Andrea Leigh
- Date: 2014
- Subjects: Protest movements -- South Africa , Political violence -- South Africa , South Africa -- Politics and government -- 21st century , Civil rights -- South Africa , Police power -- South Africa , Abuse of administrative power -- South Africa , Police -- Complaints against -- South Africa , Right to strike -- South Africa , Democracy -- South Africa , Political leadership -- South Africa -- 21st century , Political participation -- South Africa , African National Congress , South African Police Service
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2878 , http://hdl.handle.net/10962/d1013071
- Description: In South Africa, the right to protest is under constant threat as a result of the state response. Increasing cases of forceful policing and sometimes unlawful procedural prohibitions of protest attest to this. This study aims to firstly describe this situation through securitisation theory, essentially arguing that South Africa has become a securitised state. It also aims to understand how this is sustained by the state and why the state needs to use a securitised response to maintain power. Interviews were conducted with members of different communities and organisations. Their responses helped to illustrate the frustration of the right to protest or brutal policing during a protest. This provided primary evidence to support the claims of the study. The research shows that claims to protest are being delegitimised under the guise of security as protestors are being constructed as threats to the state. This is further substantiated by looking at how the reorganisation and remililtarisation of the South African Police perpetuates the criminalisation of protestors which necessitates a forceful response from the state. Furthermore, it shows that there is a distinct relationship between the prohibition of protest and the recent increase in ‘violent’ protests which legitimate forceful policing thereby creating a state sustained cycle of violence. The larger implication of this treatment is that these protestors are treated as non- citizens who are definitively excluded from participating in governance. In understanding why this is taking place, it is clear that a securtitised response is an attempt to maintain power by dispelling any threats to power, a response which is seen to have a long history in the African National Congress (ANC) when examining the politics of the ANC during exile. Maintaining power in this way distracts from the larger agenda of the state, which this thesis argues, is to mask the unraveling of the ANC’s hegemony and inability to maintain national unity. In other words, the increasing dissatisfaction of some of the citizenry which has manifested through protest greatly undermines the legitimacy of the government to provide for its people.
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"The wings of whipped butterflies" : trauma, silence and representation of the suffering child in selected contemporary African short fiction
- Authors: Njovane, Thandokazi
- Date: 2013
- Subjects: Children in literature Psychic trauma in literature Short stories, African (English) -- 21st century
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2253 , http://hdl.handle.net/10962/d1004214
- Description: This dissertation, which examines the literary representation of childhood trauma, is held together by three threads of inquiry. Firstly, I examine the stylistic devices through which three contemporary African writers – NoViolet Bulawayo, Uwem Akpan, and Mia Couto – engage with the subject of childhood trauma in five of their short stories: “Hitting Budapest”; “My Parents’ Bedroom” and “Fattening for Gabon”; and “The Day Mabata-bata Exploded” and “The Bird-Dreaming Baobab,” respectively. In each of these narratives, the use of ingén(u)s in the form of child narrators and/or focalisers instantiates a degree of structural irony, premised on the cognitive discrepancy between the protagonists’ perceptions and those of the implied reader. This structural irony then serves to underscore the reality that, though in a general sense the precise nature of traumatic experience cannot be directly communicated in language, this is exacerbated in the case of children, because children’s physical and psychological frameworks are underdeveloped. Consequently, children’s exposure to trauma and atrocity results in disruptions of both personal and communal notions of safety and security which are even more severe than those experienced by adults. Secondly, I analyse the political, cultural and economic factors which give rise to the traumatic incidents depicted in the stories, and the child characters’ interpretations and responses to these exigencies. Notions of subjectivity and intersubjectivity, identity and community, victimhood and survival, agency and disempowerment are discussed here in relation to the context of postcolonial Africa and the contemporary realities of chronic poverty, genocide, child-trafficking, the aftermath of civil war, and the legacies of colonialism and racism. Thirdly, this dissertation inspects the areas of congruence and divergence between trauma theory, literary scholarship on trauma narratives, and literary attempts to represent atrocity and trauma despite what is widely held to be the inadequacy of language – and therefore representation – to this task. There are certain differences between the three authors’ depictions of children’s experiences of trauma, despite the fact that the texts all grapple with the aporetic nature of trauma and the paradox of representing the unrepresentable. To this end, they utilise various strategies – temporal disjunctions and fragmentations, silences and lacunae, elements of the fantastical and surreal, magical realism, and instances of abjection and dissociation – to gesture towards the inexpressible, or that which is incommensurable with language. I argue that, ultimately, it is the endings of these stories which suggest the unrepresentable nature of trauma. Traumatic experience poses a challenge to representational conventions and, in its resistance, encourages a realisation that new ways of writing and speaking about trauma in the African continent, particularly with regards to children, are needed. , Adobe Acrobat 9.54 Paper Capture Plug-in
- Full Text:
- Authors: Njovane, Thandokazi
- Date: 2013
- Subjects: Children in literature Psychic trauma in literature Short stories, African (English) -- 21st century
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2253 , http://hdl.handle.net/10962/d1004214
- Description: This dissertation, which examines the literary representation of childhood trauma, is held together by three threads of inquiry. Firstly, I examine the stylistic devices through which three contemporary African writers – NoViolet Bulawayo, Uwem Akpan, and Mia Couto – engage with the subject of childhood trauma in five of their short stories: “Hitting Budapest”; “My Parents’ Bedroom” and “Fattening for Gabon”; and “The Day Mabata-bata Exploded” and “The Bird-Dreaming Baobab,” respectively. In each of these narratives, the use of ingén(u)s in the form of child narrators and/or focalisers instantiates a degree of structural irony, premised on the cognitive discrepancy between the protagonists’ perceptions and those of the implied reader. This structural irony then serves to underscore the reality that, though in a general sense the precise nature of traumatic experience cannot be directly communicated in language, this is exacerbated in the case of children, because children’s physical and psychological frameworks are underdeveloped. Consequently, children’s exposure to trauma and atrocity results in disruptions of both personal and communal notions of safety and security which are even more severe than those experienced by adults. Secondly, I analyse the political, cultural and economic factors which give rise to the traumatic incidents depicted in the stories, and the child characters’ interpretations and responses to these exigencies. Notions of subjectivity and intersubjectivity, identity and community, victimhood and survival, agency and disempowerment are discussed here in relation to the context of postcolonial Africa and the contemporary realities of chronic poverty, genocide, child-trafficking, the aftermath of civil war, and the legacies of colonialism and racism. Thirdly, this dissertation inspects the areas of congruence and divergence between trauma theory, literary scholarship on trauma narratives, and literary attempts to represent atrocity and trauma despite what is widely held to be the inadequacy of language – and therefore representation – to this task. There are certain differences between the three authors’ depictions of children’s experiences of trauma, despite the fact that the texts all grapple with the aporetic nature of trauma and the paradox of representing the unrepresentable. To this end, they utilise various strategies – temporal disjunctions and fragmentations, silences and lacunae, elements of the fantastical and surreal, magical realism, and instances of abjection and dissociation – to gesture towards the inexpressible, or that which is incommensurable with language. I argue that, ultimately, it is the endings of these stories which suggest the unrepresentable nature of trauma. Traumatic experience poses a challenge to representational conventions and, in its resistance, encourages a realisation that new ways of writing and speaking about trauma in the African continent, particularly with regards to children, are needed. , Adobe Acrobat 9.54 Paper Capture Plug-in
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An investigation of teachers' mathematical task selection in the Zambia context
- Authors: Kangwa, Evaristo
- Date: 2013
- Subjects: Mathematics -- Study and teaching
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1384 , http://hdl.handle.net/10962/d1001512
- Description: This research sought to investigate the sources and type of tasks used in the teaching of trigonometry in Zambia’s secondary schools, and to investigate the criteria used and decisions made by teachers in their selection and implementation of tasks. The study was conducted in three different school types located in high cost, medium cost and low cost respectively. One participant was chosen from each of the different categories of schools. The research was located within an interpretive paradigm. Data were collected through semi-structured interviews, lesson observations and document analysis which include: lesson plans for five consecutive days, pupils’ activity books and three textbooks predominantly used by the teachers. Document analysis was informed by the task analysis guide and essential themes which were used to tease out teachers’ task practice with regard to criteria used and decisions made in the selection and implementation of tasks. Essential themes that were qualitatively established were validated and explicated by the qualitative analysis. The findings of the study indicate that teachers picked tasks from prescribed textbooks. The study further suggests that teachers selected a mix of low and high level tasks, procedures without connections and procedures with connections tasks to be specific. There were no memorisations and doing mathematics tasks. Their choice of tasks was based on the purpose for which the task was intended. Some tasks were selected for the purpose of practicing the procedures and skills, other tasks for the promotion conceptual development. Most of high level tasks decline to low level tasks during implementation. The findings also indicate that teachers selected and implemented a variety of tasks and concepts. Furthermore, teachers presented tasks in various forms of representations and in a variety of ways. However, the results of this study could not be generalized because of the small sample involved. The results presented reflect the views and task practices of the target group. A possibility for future study would be to consider a large population, drawn across the country.
- Full Text:
- Authors: Kangwa, Evaristo
- Date: 2013
- Subjects: Mathematics -- Study and teaching
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1384 , http://hdl.handle.net/10962/d1001512
- Description: This research sought to investigate the sources and type of tasks used in the teaching of trigonometry in Zambia’s secondary schools, and to investigate the criteria used and decisions made by teachers in their selection and implementation of tasks. The study was conducted in three different school types located in high cost, medium cost and low cost respectively. One participant was chosen from each of the different categories of schools. The research was located within an interpretive paradigm. Data were collected through semi-structured interviews, lesson observations and document analysis which include: lesson plans for five consecutive days, pupils’ activity books and three textbooks predominantly used by the teachers. Document analysis was informed by the task analysis guide and essential themes which were used to tease out teachers’ task practice with regard to criteria used and decisions made in the selection and implementation of tasks. Essential themes that were qualitatively established were validated and explicated by the qualitative analysis. The findings of the study indicate that teachers picked tasks from prescribed textbooks. The study further suggests that teachers selected a mix of low and high level tasks, procedures without connections and procedures with connections tasks to be specific. There were no memorisations and doing mathematics tasks. Their choice of tasks was based on the purpose for which the task was intended. Some tasks were selected for the purpose of practicing the procedures and skills, other tasks for the promotion conceptual development. Most of high level tasks decline to low level tasks during implementation. The findings also indicate that teachers selected and implemented a variety of tasks and concepts. Furthermore, teachers presented tasks in various forms of representations and in a variety of ways. However, the results of this study could not be generalized because of the small sample involved. The results presented reflect the views and task practices of the target group. A possibility for future study would be to consider a large population, drawn across the country.
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'Becoming citizens': young people making sense of citizenship on a South African community radio station youth show
- Karamagi, Sharon Benna Kyakyo
- Authors: Karamagi, Sharon Benna Kyakyo
- Date: 2012
- Subjects: Citizenship -- Study and teaching -- South Africa Youth -- Social conditions Community radio -- South Africa -- Grahamstown Grahamstown (South Africa) -- Economic conditions
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3444 , http://hdl.handle.net/10962/d1002898
- Description: This research set out to investigate the role that community radio can potentially play as a space in which young people engage with their own role as citizens and, in so doing, participate in discussions that seek to address social problems in a community divided by class, income, gender and race. The study examines how a local community radio station - Radio Grahamstown - developed a youth programme Y4Yin which the producers of the show and its audience came together to negotiate the meaning of citizenship. The study examines whether this interactive programme was able to function as something like a public sphere where in young people were able to develop a greater sense of agency, at least in the realm of citizenship. Using evidence gathered through focus group discussions with a group of young school-going leamers, interviews conducted with the producers of the show Y4Y, and drawing on Dahlgren's elaboration of a functional public sphere, the research concludes that the show provided a useful platform for Grahamstown high school students to develop their own notions of citizenship and to, at least partially and tentatively, build some 'bridges' across the vectors of socio-economic division in the town. However, the research also concludes that the Y4Y producers often failed to use a mode of address contemporary to the youth and often did not use production techniques congruent with young people's cultural tastes. This limited the programme's appeal and its potential as an enabler of discussion about notions of citizenship and as a platform for social bridging. In addition, because of the producers' control over the choice of topics put up for discussion, open interaction was more limited than could have been expected. In addition, the study also concludes that various limitations to the leamers' freedom of expression (including their fear that teachers might be listening in to the shows) inhibited the programme's role as a deliberative public sphere where issues could be aired, common ground found, and solutions discussed.
- Full Text:
- Authors: Karamagi, Sharon Benna Kyakyo
- Date: 2012
- Subjects: Citizenship -- Study and teaching -- South Africa Youth -- Social conditions Community radio -- South Africa -- Grahamstown Grahamstown (South Africa) -- Economic conditions
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3444 , http://hdl.handle.net/10962/d1002898
- Description: This research set out to investigate the role that community radio can potentially play as a space in which young people engage with their own role as citizens and, in so doing, participate in discussions that seek to address social problems in a community divided by class, income, gender and race. The study examines how a local community radio station - Radio Grahamstown - developed a youth programme Y4Yin which the producers of the show and its audience came together to negotiate the meaning of citizenship. The study examines whether this interactive programme was able to function as something like a public sphere where in young people were able to develop a greater sense of agency, at least in the realm of citizenship. Using evidence gathered through focus group discussions with a group of young school-going leamers, interviews conducted with the producers of the show Y4Y, and drawing on Dahlgren's elaboration of a functional public sphere, the research concludes that the show provided a useful platform for Grahamstown high school students to develop their own notions of citizenship and to, at least partially and tentatively, build some 'bridges' across the vectors of socio-economic division in the town. However, the research also concludes that the Y4Y producers often failed to use a mode of address contemporary to the youth and often did not use production techniques congruent with young people's cultural tastes. This limited the programme's appeal and its potential as an enabler of discussion about notions of citizenship and as a platform for social bridging. In addition, because of the producers' control over the choice of topics put up for discussion, open interaction was more limited than could have been expected. In addition, the study also concludes that various limitations to the leamers' freedom of expression (including their fear that teachers might be listening in to the shows) inhibited the programme's role as a deliberative public sphere where issues could be aired, common ground found, and solutions discussed.
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The unstable earth landscape and language in Patrick White's Voss, Michael Ondaatje's The English Patient and David Malouf's An Imaginary Life
- Authors: Lee, Deva
- Date: 2011
- Subjects: White, Patrick, 1912-1990. Voss Ondaatje, Michael, 1943- The English patient Malouf, David, 1934- An imaginary life Language and languages in literature English fiction -- 20th century -- History and criticism
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2238 , http://hdl.handle.net/10962/d1002281
- Description: This thesis argues that Patrick White’s Voss, Michael Ondaatje’s The English Patient and David Malouf’s An Imaginary Life depict landscape in a manner that reveals the inadequacies of imperial epistemological discourses and the rationalist model of subjectivity which enables them. The study demonstrates that these novels all emphasise the instabilities inherent in imperial epistemology. White, Ondaatje and Malouf chart their protagonists’ inability to comprehend and document the landscapes they encounter, and the ways in which this failure calls into question their subjectivity and the epistemologies that underpin it. One of the principal contentions of the study, then, is that the novels under consideration deploy a postmodern aesthetic of the sublime to undermine colonial discourses. The first chapter of the thesis outlines the postcolonial and poststructural theory that informs the readings in the later chapters. Chapter Two analyses White’s representation of subjectivity, imperial discourse and the Outback in Voss. The third chapter examines Ondaatje’s depiction of the Sahara Desert in The English Patient, and focuses on his concern with the ways in which language and cartographic discourse influence the subject’s perception of the natural world. Chapter Four investigates the representation of landscape, language and subjectivity in Malouf’s An Imaginary Life. Finally, then, this study argues that literature’s unique ability to acknowledge alterity enables it to serve as an effective tool for critiquing colonial discourses.
- Full Text:
- Authors: Lee, Deva
- Date: 2011
- Subjects: White, Patrick, 1912-1990. Voss Ondaatje, Michael, 1943- The English patient Malouf, David, 1934- An imaginary life Language and languages in literature English fiction -- 20th century -- History and criticism
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2238 , http://hdl.handle.net/10962/d1002281
- Description: This thesis argues that Patrick White’s Voss, Michael Ondaatje’s The English Patient and David Malouf’s An Imaginary Life depict landscape in a manner that reveals the inadequacies of imperial epistemological discourses and the rationalist model of subjectivity which enables them. The study demonstrates that these novels all emphasise the instabilities inherent in imperial epistemology. White, Ondaatje and Malouf chart their protagonists’ inability to comprehend and document the landscapes they encounter, and the ways in which this failure calls into question their subjectivity and the epistemologies that underpin it. One of the principal contentions of the study, then, is that the novels under consideration deploy a postmodern aesthetic of the sublime to undermine colonial discourses. The first chapter of the thesis outlines the postcolonial and poststructural theory that informs the readings in the later chapters. Chapter Two analyses White’s representation of subjectivity, imperial discourse and the Outback in Voss. The third chapter examines Ondaatje’s depiction of the Sahara Desert in The English Patient, and focuses on his concern with the ways in which language and cartographic discourse influence the subject’s perception of the natural world. Chapter Four investigates the representation of landscape, language and subjectivity in Malouf’s An Imaginary Life. Finally, then, this study argues that literature’s unique ability to acknowledge alterity enables it to serve as an effective tool for critiquing colonial discourses.
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An exploratory study into various stakeholders' perceptions and experiences of participative management in a high school in the Cala district, Eastern Cape
- Authors: Stofile, Attwell Mzamane
- Date: 2006
- Subjects: School management and organization -- South Africa -- Eastern Cape Educational leadership -- South Africa -- Eastern Cape Educational change -- South Africa -- Eastern Cape Management -- Employee participation -- South Africa
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1538 , http://hdl.handle.net/10962/d1003420
- Description: Although the word “participation” has been with mankind for a long time and is widely used by writers on management areas, it still remains difficult to define precisely what it means. As a result, “participation” is one of the most misunderstood and confusing ideas that have emerged from the field of human relations. This study seeks to explore the perceptions and understanding that the various stakeholders have about participative management. The purpose is to find out the meaning and interpretations the stakeholders attach to the idea of participation. This study is an interpretive case study of a Senior Secondary School in the Cala District of the Eastern Cape. A phenomenological approach was employed in data gathering using two data collection tools namely questionnaires and interviews. The collected data provided insight into stakeholders’ views on participative management, highlighted challenges around the implementation of participative management, and revealed strategies to be utilized in promoting participation. The findings reveal that participation is a controversial idea that is easier said than done. There is no recipe for the implementation of a participative approach; it depends on the situation and nature of the subordinates. Furthermore, organization members need to adopt new thinking patterns in order to be responsive to change. Open communication emerges as the key to having genuine participation. However, participation still brings anxiety and fear of losing power to those managers who do not take kindly to it. It is recommended that good interpersonal relations should be maintained at all times to promote participation and that for schools to be effective, partnership with parents and stakeholders is essential.
- Full Text:
- Authors: Stofile, Attwell Mzamane
- Date: 2006
- Subjects: School management and organization -- South Africa -- Eastern Cape Educational leadership -- South Africa -- Eastern Cape Educational change -- South Africa -- Eastern Cape Management -- Employee participation -- South Africa
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1538 , http://hdl.handle.net/10962/d1003420
- Description: Although the word “participation” has been with mankind for a long time and is widely used by writers on management areas, it still remains difficult to define precisely what it means. As a result, “participation” is one of the most misunderstood and confusing ideas that have emerged from the field of human relations. This study seeks to explore the perceptions and understanding that the various stakeholders have about participative management. The purpose is to find out the meaning and interpretations the stakeholders attach to the idea of participation. This study is an interpretive case study of a Senior Secondary School in the Cala District of the Eastern Cape. A phenomenological approach was employed in data gathering using two data collection tools namely questionnaires and interviews. The collected data provided insight into stakeholders’ views on participative management, highlighted challenges around the implementation of participative management, and revealed strategies to be utilized in promoting participation. The findings reveal that participation is a controversial idea that is easier said than done. There is no recipe for the implementation of a participative approach; it depends on the situation and nature of the subordinates. Furthermore, organization members need to adopt new thinking patterns in order to be responsive to change. Open communication emerges as the key to having genuine participation. However, participation still brings anxiety and fear of losing power to those managers who do not take kindly to it. It is recommended that good interpersonal relations should be maintained at all times to promote participation and that for schools to be effective, partnership with parents and stakeholders is essential.
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Assessing the need for specific services for HIV/AIDS affected people using participatory needs assessment processes
- Authors: Moresby-White, Ann
- Date: 2002
- Subjects: AIDS (Disease) -- Patients -- Services for , HIV-positive persons -- Services for , AIDS (Disease) -- Research , AIDS (Disease) -- South Africa
- Language: English
- Type: Thesis , Masters , MSocSc
- Identifier: vital:713 , http://hdl.handle.net/10962/d1007692 , AIDS (Disease) -- Patients -- Services for , HIV-positive persons -- Services for , AIDS (Disease) -- Research , AIDS (Disease) -- South Africa
- Description: The purpose of the study undertaken is to develop knowledge to assist service providers in their planning and implementation of community -based programmes and projects. The thesis explores the most appropriate way of conducting a needs assessment, relating to HIV/AIDS services in a particular community; thereafter the needs assessment was carried out. This qualitative research study is conducted using participatory methods and techniques. The research reviews literature pertaining to HIV/AIDS, specifically in Africa, South Africa and the Eastern Cape and incorporates a discussion on the concept of community, community development and poverty. The design of the needs assessment tool, implementation and analysis is conducted through focus group discussions and individual semi-structured interviews. The theory on participatory approaches and community development are central to this study. The study found that HIV / AIDS as an issue is not perceived by the community under study to be an immediate need in light of basic needs being identified as priority. The use of participatory methods in this study highlighted the diversity within communities. Service providers who wish to initiate community - based projects need to take note of diversity and personal interests of individuals or groups who become involved in community- based projects. The study further highlighted the need for service providers to provide training, to their staff in participatory approaches and techniques, before embarking on community development projects. The study concludes that services relating to the HIV/AIDS epidemic cannot be carried out in isolation, but that an integrated approach is needed in the planning and implementation of services and programmes to address those affected by HIV/AIDS.
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- Authors: Moresby-White, Ann
- Date: 2002
- Subjects: AIDS (Disease) -- Patients -- Services for , HIV-positive persons -- Services for , AIDS (Disease) -- Research , AIDS (Disease) -- South Africa
- Language: English
- Type: Thesis , Masters , MSocSc
- Identifier: vital:713 , http://hdl.handle.net/10962/d1007692 , AIDS (Disease) -- Patients -- Services for , HIV-positive persons -- Services for , AIDS (Disease) -- Research , AIDS (Disease) -- South Africa
- Description: The purpose of the study undertaken is to develop knowledge to assist service providers in their planning and implementation of community -based programmes and projects. The thesis explores the most appropriate way of conducting a needs assessment, relating to HIV/AIDS services in a particular community; thereafter the needs assessment was carried out. This qualitative research study is conducted using participatory methods and techniques. The research reviews literature pertaining to HIV/AIDS, specifically in Africa, South Africa and the Eastern Cape and incorporates a discussion on the concept of community, community development and poverty. The design of the needs assessment tool, implementation and analysis is conducted through focus group discussions and individual semi-structured interviews. The theory on participatory approaches and community development are central to this study. The study found that HIV / AIDS as an issue is not perceived by the community under study to be an immediate need in light of basic needs being identified as priority. The use of participatory methods in this study highlighted the diversity within communities. Service providers who wish to initiate community - based projects need to take note of diversity and personal interests of individuals or groups who become involved in community- based projects. The study further highlighted the need for service providers to provide training, to their staff in participatory approaches and techniques, before embarking on community development projects. The study concludes that services relating to the HIV/AIDS epidemic cannot be carried out in isolation, but that an integrated approach is needed in the planning and implementation of services and programmes to address those affected by HIV/AIDS.
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Modelling the distribution and abundance of several demersal fish species on the Agulhas Bank, South Africa
- Authors: Sampson, Mark Robert
- Date: 2002
- Subjects: Fishes -- South Africa -- Geographical distribution , Fishes -- South Africa -- Geographical distribution -- Mathematical models
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5343 , http://hdl.handle.net/10962/d1006207 , Fishes -- South Africa -- Geographical distribution , Fishes -- South Africa -- Geographical distribution -- Mathematical models
- Description: The Agulhas Bank supports a speciose fish community, many of which are commercially important. Despite substantial research being conducted on aspects of their biology spatial aspects of their distribution and abundance in relation to environment parameters has been ignored. This study, therefore, addressed aspects related to the distribution and abundance of representative species on the Agulhas Bank within a Geographic Information System (GIS). Four candidate species were chosen due to their importance either in numbers or unit mass to the South African demersal trawl fishery. The species also shared morphological and taxonomic similarities. The candidate species chosen were the two Cape hake species, shallow-water hake Meluccius capensis, and deep-water hake Merluccius paradoxus, and the two pleuronectiform species being Agulhas sole Austroglossus pectoralis and redspotted tonguesole Cynoglossus zanzibarensis. The use of a GIS was appropriate and allowed for hidden spatial patterns be exposed and illustrated visually, while also facilitating the quantification of the relationships between distribution/abundance and certain environmental predictors using statistical methods The Department of Marine and Coastal Management, Cape Town, supplied biological data in the form of length frequency and biomass information from spring (AprillMay) and autumn (September/October) cruises conducted between 1986 and 1993 on the R. V. Africana. The Council for National Geoscience, Cape Town, supplied sediment data for the entire southern African coastline. Initial exploratory data analysis highlighted potential relationships between environmental variables and abundance for each specie's life-history stanzas. Variations in spatial distribution were found to be significantly different between each life-history stanzas within species. Fish density as a function of the additive effects of the various environmental parameters, including temperature, depth and sediment type, was assessed using a Poisson Generalized Additive Model (GAM), while distribution was analysed with a logistic GAM. A predictive logistic model was then created, taking into consideration the importance of the predictor variables for each species, allowing for predictive estimates to be made for each species by inputting environmental information within the study area. The importance of certain environmental variables influencing distribution and abundance were noted. General patterns indicated that sediment was the most important to both the distribution and abundance of the two pleuronectiform species and juvenile life-history stanzas, while the adult gadoids' distribution and abundance appeared to be depth dependent.
- Full Text:
- Authors: Sampson, Mark Robert
- Date: 2002
- Subjects: Fishes -- South Africa -- Geographical distribution , Fishes -- South Africa -- Geographical distribution -- Mathematical models
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5343 , http://hdl.handle.net/10962/d1006207 , Fishes -- South Africa -- Geographical distribution , Fishes -- South Africa -- Geographical distribution -- Mathematical models
- Description: The Agulhas Bank supports a speciose fish community, many of which are commercially important. Despite substantial research being conducted on aspects of their biology spatial aspects of their distribution and abundance in relation to environment parameters has been ignored. This study, therefore, addressed aspects related to the distribution and abundance of representative species on the Agulhas Bank within a Geographic Information System (GIS). Four candidate species were chosen due to their importance either in numbers or unit mass to the South African demersal trawl fishery. The species also shared morphological and taxonomic similarities. The candidate species chosen were the two Cape hake species, shallow-water hake Meluccius capensis, and deep-water hake Merluccius paradoxus, and the two pleuronectiform species being Agulhas sole Austroglossus pectoralis and redspotted tonguesole Cynoglossus zanzibarensis. The use of a GIS was appropriate and allowed for hidden spatial patterns be exposed and illustrated visually, while also facilitating the quantification of the relationships between distribution/abundance and certain environmental predictors using statistical methods The Department of Marine and Coastal Management, Cape Town, supplied biological data in the form of length frequency and biomass information from spring (AprillMay) and autumn (September/October) cruises conducted between 1986 and 1993 on the R. V. Africana. The Council for National Geoscience, Cape Town, supplied sediment data for the entire southern African coastline. Initial exploratory data analysis highlighted potential relationships between environmental variables and abundance for each specie's life-history stanzas. Variations in spatial distribution were found to be significantly different between each life-history stanzas within species. Fish density as a function of the additive effects of the various environmental parameters, including temperature, depth and sediment type, was assessed using a Poisson Generalized Additive Model (GAM), while distribution was analysed with a logistic GAM. A predictive logistic model was then created, taking into consideration the importance of the predictor variables for each species, allowing for predictive estimates to be made for each species by inputting environmental information within the study area. The importance of certain environmental variables influencing distribution and abundance were noted. General patterns indicated that sediment was the most important to both the distribution and abundance of the two pleuronectiform species and juvenile life-history stanzas, while the adult gadoids' distribution and abundance appeared to be depth dependent.
- Full Text:
A case study of feedback strategies in The Open Learning Systems Trust (OLSET) Radio Learning Programmes
- Authors: Kenyon, Jennifer Berry
- Date: 1999
- Subjects: English language -- Study and teaching -- Foreign speakers , Educational broadcasting , Radio in education -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2352 , http://hdl.handle.net/10962/d1002634 , English language -- Study and teaching -- Foreign speakers , Educational broadcasting , Radio in education -- South Africa
- Description: The following is a case study of three Foundation Phase teachers' classroom practice while using the Open Learning Systems Education Trust (OLSET) Radio Learning Programmes, "English In Action" Level Two materials with their Grade Two learners. This case study describes and analyses the feedback strategies of the three teachers. The radio learning programmes have been developed to provide teachers with an effective interactive set of materials to assist their learners in the acquisition of English. These audio materials also provide teachers with opportunities to be creative and responsive to their learners' specific needs. The feedback strategies described in this study are the teachers' use of their learners' mother tongue, correction oflearner error, and use of praise and encouragement during the three Teacher-Led Activity (TLA) segments of the radio programmes. These TLAs give teachers approximately 12 minutes per lesson during which they are called on to manage the materials according to their learners' specific needs. The TLAs are specifically designed to give learners the opportunity to use and respond to English in particular contexts. This study examines three teachers' feedback to their learners in order to find out what kind of feedback has been made. An attempt has also been made to analyse the nature of the feedback. It was found, from the description and analysis of the teachers' feedback, that when teachers used their learners' mother tongue this was more often used to translate words or phrases which were part of the radio narrator's instructions to the learners and these translations were then repeated in English. Teachers corrected very few learner errors. The most common form of correction was to model the correct form and have the learners repeat this. In spite of claiming that correction of errors was important and all three teachers said they did correct their learners' errors, there was very little evidence of this practice in the sample described in this study. The use of praise and encouragement was a strategy that all three teachers claimed they practised but almost no instances of the use of praise were described. The three teachers used only the word "good" to praise any of their learners' efforts and, in fact, all three used this only twice in each of the three lessons described in this study. In terms of language learning a number of factors have been compared. Some of these include teachers' repetition oflearners' answers and their correction oflearner responses by modelling. They were also observed allowing a variety of learner response as well as ensuring a number of individual learners were able to respond. These factors appear to have enhanced the language learning in the classrooms. However, it was also observed that the teachers needed more support in order to develop more explicit strategies to use their learners' mother tongue, to praise learners and to correct learner error purposefully in their classroom practice. There is a need for guidance to be given teachers in the development and use of open-ended questions and strategies which could encourage the development of higher order language skills in their learners. These findings will influence OLSET's teacher development curriculum. It is envisaged that strategies and activities designed to provide teachers with opportunities to reflect on their own practice with regard to the feedback they provide will be incorporated into the workshops and teacher support systems provided by OLSET's teacher development team.
- Full Text:
- Authors: Kenyon, Jennifer Berry
- Date: 1999
- Subjects: English language -- Study and teaching -- Foreign speakers , Educational broadcasting , Radio in education -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2352 , http://hdl.handle.net/10962/d1002634 , English language -- Study and teaching -- Foreign speakers , Educational broadcasting , Radio in education -- South Africa
- Description: The following is a case study of three Foundation Phase teachers' classroom practice while using the Open Learning Systems Education Trust (OLSET) Radio Learning Programmes, "English In Action" Level Two materials with their Grade Two learners. This case study describes and analyses the feedback strategies of the three teachers. The radio learning programmes have been developed to provide teachers with an effective interactive set of materials to assist their learners in the acquisition of English. These audio materials also provide teachers with opportunities to be creative and responsive to their learners' specific needs. The feedback strategies described in this study are the teachers' use of their learners' mother tongue, correction oflearner error, and use of praise and encouragement during the three Teacher-Led Activity (TLA) segments of the radio programmes. These TLAs give teachers approximately 12 minutes per lesson during which they are called on to manage the materials according to their learners' specific needs. The TLAs are specifically designed to give learners the opportunity to use and respond to English in particular contexts. This study examines three teachers' feedback to their learners in order to find out what kind of feedback has been made. An attempt has also been made to analyse the nature of the feedback. It was found, from the description and analysis of the teachers' feedback, that when teachers used their learners' mother tongue this was more often used to translate words or phrases which were part of the radio narrator's instructions to the learners and these translations were then repeated in English. Teachers corrected very few learner errors. The most common form of correction was to model the correct form and have the learners repeat this. In spite of claiming that correction of errors was important and all three teachers said they did correct their learners' errors, there was very little evidence of this practice in the sample described in this study. The use of praise and encouragement was a strategy that all three teachers claimed they practised but almost no instances of the use of praise were described. The three teachers used only the word "good" to praise any of their learners' efforts and, in fact, all three used this only twice in each of the three lessons described in this study. In terms of language learning a number of factors have been compared. Some of these include teachers' repetition oflearners' answers and their correction oflearner responses by modelling. They were also observed allowing a variety of learner response as well as ensuring a number of individual learners were able to respond. These factors appear to have enhanced the language learning in the classrooms. However, it was also observed that the teachers needed more support in order to develop more explicit strategies to use their learners' mother tongue, to praise learners and to correct learner error purposefully in their classroom practice. There is a need for guidance to be given teachers in the development and use of open-ended questions and strategies which could encourage the development of higher order language skills in their learners. These findings will influence OLSET's teacher development curriculum. It is envisaged that strategies and activities designed to provide teachers with opportunities to reflect on their own practice with regard to the feedback they provide will be incorporated into the workshops and teacher support systems provided by OLSET's teacher development team.
- Full Text:
Improvement of fertility and hatchability of artificially incubated ostrich eggs in the little Karoo
- Van Schalkwyk, Salmon Jacobus
- Authors: Van Schalkwyk, Salmon Jacobus
- Date: 1998
- Subjects: Ostrich farming -- South Africa , Eggs -- Hatchability , Eggs -- Incubation
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5713 , http://hdl.handle.net/10962/d1005399
- Description: Ostriches are an important commercial species in South Africa and are becoming increasingly so in other parts of the world. Fertility and hatchability of artificially incubated ostrich eggs, however, is generally regarded as low compared to other poultry species and to ostriches in the wild. Investigation into specific farming practices at present indicated scope for an overall improvement in productivity through a sound breeding strategy. This thesis investigated factors that affect egg production, fertility, and hatchability of artificially incubated eggs in the Little Karoo region of South Africa. Specific breeding pair combinations accounted for the major variations in egg weight, hatchability, chick production and offspring weight at slaughter age. An appreciable proportion of variation in reproductive traits was attributable to the repeatable nature of breeding pair performance from year to year, even from first breeding attempts, suggesting that selection of good breeding stock can be made from an early age. Artificially incubated eggs showed improved hatchability when eggs were collected two to three hours after lay rather than the following morning. Storing position of eggs did not significantly effect hatchability when eggs were stored for a maximum of one week. The critical zero temperature for ostrich eggs, below which no embryonical development takes place, was found to be ± 25°C and cooling eggs to temperatures below 20°C for complete cessation of embryonic development during storage resulted in better hatchabilities compared to eggs stored at 25°C room temperature. Hatchability decreased when incubator temperatures were raised from 36 to 37.3°C. Large temperature fluctuations and gradients, which encompass detrimental temperatures, persist within forced draught wooden incubators of the type most commonly in use in the Little Karoo region. The highest temperatures occurred at the top of these incubators and will consequently have a negative impact on hatchability. The ontogeny of ostrich egg metabolism showed an exponential increase during the first 70% of incubation followed by a decline to 75% of the peak value between days 31 and 38 of incubation. From peak levels of embryonic development it was calculated that single stage incubators needs an airflow of 54.4 1/egg.hour to maintain oxygen levels just below 21% and carbon dioxide levels below 0.5%. Lower embryonic mortalities were observed when eggs were turned twenty-four times/day in an electronic incubator compared to hand turning twice a day. Eggs rotated through increasing angles between 60 and 90° resulted in a linear improvement in hatchability. In incubators where turning angles were fixed at 60°, lower hatchabilities were overcome by incubating eggs for 2 - 3 weeks in a horizontal position before placing them vertically. No specific farming practice could be singled out as the main cause of low fertility or hatchability but rather a combination of certain practices applied wrongly.
- Full Text:
Improvement of fertility and hatchability of artificially incubated ostrich eggs in the little Karoo
- Authors: Van Schalkwyk, Salmon Jacobus
- Date: 1998
- Subjects: Ostrich farming -- South Africa , Eggs -- Hatchability , Eggs -- Incubation
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5713 , http://hdl.handle.net/10962/d1005399
- Description: Ostriches are an important commercial species in South Africa and are becoming increasingly so in other parts of the world. Fertility and hatchability of artificially incubated ostrich eggs, however, is generally regarded as low compared to other poultry species and to ostriches in the wild. Investigation into specific farming practices at present indicated scope for an overall improvement in productivity through a sound breeding strategy. This thesis investigated factors that affect egg production, fertility, and hatchability of artificially incubated eggs in the Little Karoo region of South Africa. Specific breeding pair combinations accounted for the major variations in egg weight, hatchability, chick production and offspring weight at slaughter age. An appreciable proportion of variation in reproductive traits was attributable to the repeatable nature of breeding pair performance from year to year, even from first breeding attempts, suggesting that selection of good breeding stock can be made from an early age. Artificially incubated eggs showed improved hatchability when eggs were collected two to three hours after lay rather than the following morning. Storing position of eggs did not significantly effect hatchability when eggs were stored for a maximum of one week. The critical zero temperature for ostrich eggs, below which no embryonical development takes place, was found to be ± 25°C and cooling eggs to temperatures below 20°C for complete cessation of embryonic development during storage resulted in better hatchabilities compared to eggs stored at 25°C room temperature. Hatchability decreased when incubator temperatures were raised from 36 to 37.3°C. Large temperature fluctuations and gradients, which encompass detrimental temperatures, persist within forced draught wooden incubators of the type most commonly in use in the Little Karoo region. The highest temperatures occurred at the top of these incubators and will consequently have a negative impact on hatchability. The ontogeny of ostrich egg metabolism showed an exponential increase during the first 70% of incubation followed by a decline to 75% of the peak value between days 31 and 38 of incubation. From peak levels of embryonic development it was calculated that single stage incubators needs an airflow of 54.4 1/egg.hour to maintain oxygen levels just below 21% and carbon dioxide levels below 0.5%. Lower embryonic mortalities were observed when eggs were turned twenty-four times/day in an electronic incubator compared to hand turning twice a day. Eggs rotated through increasing angles between 60 and 90° resulted in a linear improvement in hatchability. In incubators where turning angles were fixed at 60°, lower hatchabilities were overcome by incubating eggs for 2 - 3 weeks in a horizontal position before placing them vertically. No specific farming practice could be singled out as the main cause of low fertility or hatchability but rather a combination of certain practices applied wrongly.
- Full Text:
A case study of a series of process writing workshops for teachers of English as a second language
- Authors: Claude, Marianne
- Date: 1994
- Subjects: English language -- Study and teaching -- South Africa -- Foreign speakers English language -- Writing
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1433 , http://hdl.handle.net/10962/d1003314
- Description: The case study, which is described in this thesis, is concerned with two aspects of second language teaching and learning, namely process writing and 'teacher development'. Ten Zulu speaking, English second language teachers in Durban, Natal, participated in a series of process writing workshops. Before the workshops, they were given opportunities to reflect, in interviews, upon their own past and present writing practices. After the workshops there were follow-up interviews to elicit their further understanding of what is involved in writing. The workshop materials were compiled and written by the researcher. The aims of the research project were, in summary, the following: to let the teachers, who are teachers of writing in their classrooms, become participating writers themselves; to make the process writing workshops be a reflective activity through which the participants would develop as teachers. The entire case study is positioned within critical theory, as a philosophical framework, in which the teachers' reflections upon their writing experiences is seen as emancipatory practice. The research project was small scale and predominantly qualitative. A narrative, 'explanation-building' analysis of the entire findings forms the major part of the thesis. The writing workshops gave the teachers in this study occasion to experience process writing; furthermore they were enabled to reflect in detail on their experiences. It is suggested that teacher training colleges and in-service courses incorporate the 'writing workshops for teachers ' concept, as an activity for growth and development. Further research may take the form of long term action research into how teachers who have attended such workshops implement the insights they have gained in their classrooms.
- Full Text:
- Authors: Claude, Marianne
- Date: 1994
- Subjects: English language -- Study and teaching -- South Africa -- Foreign speakers English language -- Writing
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1433 , http://hdl.handle.net/10962/d1003314
- Description: The case study, which is described in this thesis, is concerned with two aspects of second language teaching and learning, namely process writing and 'teacher development'. Ten Zulu speaking, English second language teachers in Durban, Natal, participated in a series of process writing workshops. Before the workshops, they were given opportunities to reflect, in interviews, upon their own past and present writing practices. After the workshops there were follow-up interviews to elicit their further understanding of what is involved in writing. The workshop materials were compiled and written by the researcher. The aims of the research project were, in summary, the following: to let the teachers, who are teachers of writing in their classrooms, become participating writers themselves; to make the process writing workshops be a reflective activity through which the participants would develop as teachers. The entire case study is positioned within critical theory, as a philosophical framework, in which the teachers' reflections upon their writing experiences is seen as emancipatory practice. The research project was small scale and predominantly qualitative. A narrative, 'explanation-building' analysis of the entire findings forms the major part of the thesis. The writing workshops gave the teachers in this study occasion to experience process writing; furthermore they were enabled to reflect in detail on their experiences. It is suggested that teacher training colleges and in-service courses incorporate the 'writing workshops for teachers ' concept, as an activity for growth and development. Further research may take the form of long term action research into how teachers who have attended such workshops implement the insights they have gained in their classrooms.
- Full Text:
The Southern African Development Coordination Conference (SADCC) : part of a whole or a cover?
- Authors: Lubbe, Ingrid Lisa
- Date: 1990
- Subjects: Southern African Development Coordination Conference
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: vital:2753 , http://hdl.handle.net/10962/d1002000
- Description: The object of this analysis of the Southern African Development Coordination Conference (SADCC) was to examine the interaction between the states which comprise the organisation in terms of regional and international factors which either facilitated or constrained the pursuit of the organisation's economic goals. To this end a theoretical orientation which would place the organisation in context of regional and international political and economic interaction was necessary. International regime theory was used to place the organisation in an international context, and at the same time provided a theoretical dimension which could be used to analyse empirical evidence on the SADCC organisation's functioning. The application of regime theory clearly highlighted the fact that SADCC's economic goals are constrained by the degree to which all of the SADCC states are integrated on the economic level with western market economy and furthermore , by the fact that these links are reinforced for seven of the nine SADCC states by their economic dependence on South Africa. The above conclusion showed that in terms of the perpetuation of the SADCC organisation as an economic regime, according to the regime theory outlined in Chapter One, the goals of SADCC did not create a firm basis for economic cooperation in the long term. The future of the SADCC organisation in it's present form will depend on how long the racial policies of South Africa continue, for the analysis makes clear that the organisation has much more political than economic coherency. The use of a regime framework showed that in terms of the SADCC states individual economic positions, the historical and structural links between South Africa, the majority of the SADCC states and the West will continue indefinitely due to the strength of the structural economic links between the Southern African region and the western market economy. Thus the analysis proves, within the parameters of international regime theory, the lack of economic coherency within the SADCC organisation's goals, and the strength of the economic ties between the Southern African region and the West.
- Full Text:
- Authors: Lubbe, Ingrid Lisa
- Date: 1990
- Subjects: Southern African Development Coordination Conference
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: vital:2753 , http://hdl.handle.net/10962/d1002000
- Description: The object of this analysis of the Southern African Development Coordination Conference (SADCC) was to examine the interaction between the states which comprise the organisation in terms of regional and international factors which either facilitated or constrained the pursuit of the organisation's economic goals. To this end a theoretical orientation which would place the organisation in context of regional and international political and economic interaction was necessary. International regime theory was used to place the organisation in an international context, and at the same time provided a theoretical dimension which could be used to analyse empirical evidence on the SADCC organisation's functioning. The application of regime theory clearly highlighted the fact that SADCC's economic goals are constrained by the degree to which all of the SADCC states are integrated on the economic level with western market economy and furthermore , by the fact that these links are reinforced for seven of the nine SADCC states by their economic dependence on South Africa. The above conclusion showed that in terms of the perpetuation of the SADCC organisation as an economic regime, according to the regime theory outlined in Chapter One, the goals of SADCC did not create a firm basis for economic cooperation in the long term. The future of the SADCC organisation in it's present form will depend on how long the racial policies of South Africa continue, for the analysis makes clear that the organisation has much more political than economic coherency. The use of a regime framework showed that in terms of the SADCC states individual economic positions, the historical and structural links between South Africa, the majority of the SADCC states and the West will continue indefinitely due to the strength of the structural economic links between the Southern African region and the western market economy. Thus the analysis proves, within the parameters of international regime theory, the lack of economic coherency within the SADCC organisation's goals, and the strength of the economic ties between the Southern African region and the West.
- Full Text:
An inquiry into relationships between certain personality factors and attitudes to mathematics in some selected schools in the range standards three to five
- Authors: Light, David Leon
- Date: 1984
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1880 , http://hdl.handle.net/10962/d1005866
- Description: Mathematics--Study and teaching (Elementary)--Psychological aspects
- Full Text:
- Authors: Light, David Leon
- Date: 1984
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1880 , http://hdl.handle.net/10962/d1005866
- Description: Mathematics--Study and teaching (Elementary)--Psychological aspects
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On becoming a psychotherapist
- Authors: Anema, Margaret Catherine
- Date: 1982
- Subjects: Psychotherapist and patient , Psychotherapy , Psychotherapists
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: vital:2913 , http://hdl.handle.net/10962/d1002078
- Description: From Introduction: To learn to focus on the other, I first have to learn my natural limits. Unless my natural limits are found, I cannot focus on myself or the other with freedom. I will either draw back or intrude. As I learn my natural limits, I free the energy I previously used in questioning limits. Having recognised that I am bounded, the effect of my released energy is to deepen my space. The infinity which used to lie beyond the horizon is brought into the realm of the human where it can be useful. As a psychotherapist the deepening (that is differentiation) of my own space is very important. It means that the space I share with the other is better explored and better known. The raw data for this thesis is a record of 2½ weeks of intensive psychotherapy and 3 weeks of intensive explication. During this time I explored the interrelated themes of my own limits and the particular shadowedness of the space I shared with Tony, the person in psychotherapy with me.
- Full Text:
- Authors: Anema, Margaret Catherine
- Date: 1982
- Subjects: Psychotherapist and patient , Psychotherapy , Psychotherapists
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: vital:2913 , http://hdl.handle.net/10962/d1002078
- Description: From Introduction: To learn to focus on the other, I first have to learn my natural limits. Unless my natural limits are found, I cannot focus on myself or the other with freedom. I will either draw back or intrude. As I learn my natural limits, I free the energy I previously used in questioning limits. Having recognised that I am bounded, the effect of my released energy is to deepen my space. The infinity which used to lie beyond the horizon is brought into the realm of the human where it can be useful. As a psychotherapist the deepening (that is differentiation) of my own space is very important. It means that the space I share with the other is better explored and better known. The raw data for this thesis is a record of 2½ weeks of intensive psychotherapy and 3 weeks of intensive explication. During this time I explored the interrelated themes of my own limits and the particular shadowedness of the space I shared with Tony, the person in psychotherapy with me.
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Confirmation : an analysis and assessment
- Authors: Maker, Derek Alan
- Date: 1967
- Subjects: Confirmation
- Language: English
- Type: Thesis , Bachelor , BDiv
- Identifier: vital:1262 , http://hdl.handle.net/10962/d1012797 , Confirmation
- Description: Intelligently to discuss Christian initiatory rites we must begin with Baptism. In recent years many scholars have attempted a critical re-assessment of baptism based upon a renewed exegetical study of the New Testament. This chapter is written in the light of that work. Most theologians are agreed upon the cardinal importance of baptism. Calvin is generally representative in saying, "Baptism is a sign of initiation, by which we are admitted into the society of the Church, in order that, being incorporated into Christ we may be numbered among the children of God". Wheeler Robinson, a Baptist theologian, asserts that, "Baptism is the door of entrance to the Church". Intro. p. 1.
- Full Text:
- Authors: Maker, Derek Alan
- Date: 1967
- Subjects: Confirmation
- Language: English
- Type: Thesis , Bachelor , BDiv
- Identifier: vital:1262 , http://hdl.handle.net/10962/d1012797 , Confirmation
- Description: Intelligently to discuss Christian initiatory rites we must begin with Baptism. In recent years many scholars have attempted a critical re-assessment of baptism based upon a renewed exegetical study of the New Testament. This chapter is written in the light of that work. Most theologians are agreed upon the cardinal importance of baptism. Calvin is generally representative in saying, "Baptism is a sign of initiation, by which we are admitted into the society of the Church, in order that, being incorporated into Christ we may be numbered among the children of God". Wheeler Robinson, a Baptist theologian, asserts that, "Baptism is the door of entrance to the Church". Intro. p. 1.
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