Rhodes University Research Report 2006
- Authors: Rhodes University
- Date: 2006
- Language: English
- Type: Text
- Identifier: vital:561 , http://hdl.handle.net/10962/d1011954
- Description: [From Preface] Rhodes University defines as one of its three core activities the production of knowledge through stimulating imaginative and rigorous research of all kinds (fundamental, applied, policy-oriented, etc.), and in all disciplines and fields. Though a small university with less than 6 000 students, the student profile and research output (publications, Master’s and Doctoral graduates) of Rhodes ensures that it occupies a distinctive place in the overall South African higher education landscape. For one, almost 25% of Rhodes’ students are postgraduates. Coming from a diversity of countries, these postgraduates ensure that Rhodes is a cosmopolitan and fertile environment of thinking and ideas. For another, Rhodes has the best research output of all South African universities, a testimony to the dedication and passion of its academics for research and the commitment of the University to nurture and cultivate knowledge production of all kinds. During 2006, Rhodes academics published 113 books and book chapters, 312 articles, and contributed 636 papers to conferences. One hundred and seventy students graduated with Master’s degrees and 47 with Doctorates. In a number of areas Rhodes’ academics are at the cutting-edge of research, pushing the frontiers knowledge production. The award of a Department of Science and Technology sponsored Research Chair in Chemistry to Professor Nyokong is one indicator of national recognition of this reality. Rhodes researchers are at the forefront of a number of national projects, and also continue to attract research funding from a variety of international and national research agencies and industry. Rhodes possesses an admirable research culture, and provides the intellectual space for the flourishing and debate of ideas, as evidenced by the number and diversity of seminars, public lectures, and the quality of local and international academics that visit Rhodes. A number of Rhodes academics also make important contributions to national public debate, enhancing the visibility of Rhodes in the intellectual life of South Africa. Rhodes University is committed to maintain and, in the years to come, to enhance its research output, to broaden its research base, to bring on steam new generations of researchers (who are also increasing women and black), and to continue being a distinctive South African university in the domain of knowledge production.
- Full Text:
- Date Issued: 2006
- Authors: Rhodes University
- Date: 2006
- Language: English
- Type: Text
- Identifier: vital:561 , http://hdl.handle.net/10962/d1011954
- Description: [From Preface] Rhodes University defines as one of its three core activities the production of knowledge through stimulating imaginative and rigorous research of all kinds (fundamental, applied, policy-oriented, etc.), and in all disciplines and fields. Though a small university with less than 6 000 students, the student profile and research output (publications, Master’s and Doctoral graduates) of Rhodes ensures that it occupies a distinctive place in the overall South African higher education landscape. For one, almost 25% of Rhodes’ students are postgraduates. Coming from a diversity of countries, these postgraduates ensure that Rhodes is a cosmopolitan and fertile environment of thinking and ideas. For another, Rhodes has the best research output of all South African universities, a testimony to the dedication and passion of its academics for research and the commitment of the University to nurture and cultivate knowledge production of all kinds. During 2006, Rhodes academics published 113 books and book chapters, 312 articles, and contributed 636 papers to conferences. One hundred and seventy students graduated with Master’s degrees and 47 with Doctorates. In a number of areas Rhodes’ academics are at the cutting-edge of research, pushing the frontiers knowledge production. The award of a Department of Science and Technology sponsored Research Chair in Chemistry to Professor Nyokong is one indicator of national recognition of this reality. Rhodes researchers are at the forefront of a number of national projects, and also continue to attract research funding from a variety of international and national research agencies and industry. Rhodes possesses an admirable research culture, and provides the intellectual space for the flourishing and debate of ideas, as evidenced by the number and diversity of seminars, public lectures, and the quality of local and international academics that visit Rhodes. A number of Rhodes academics also make important contributions to national public debate, enhancing the visibility of Rhodes in the intellectual life of South Africa. Rhodes University is committed to maintain and, in the years to come, to enhance its research output, to broaden its research base, to bring on steam new generations of researchers (who are also increasing women and black), and to continue being a distinctive South African university in the domain of knowledge production.
- Full Text:
- Date Issued: 2006
Rhodes University, Department of Ichthyology and Fisheries Science: Research Report series 18
- Authors: Jones, Clifford L W
- Date: 2006
- Language: English
- Type: Book
- Identifier: vital:7160 , http://hdl.handle.net/10962/d1011934
- Full Text:
- Date Issued: 2006
- Authors: Jones, Clifford L W
- Date: 2006
- Language: English
- Type: Book
- Identifier: vital:7160 , http://hdl.handle.net/10962/d1011934
- Full Text:
- Date Issued: 2006
Sand stress as a non-determinant of habitat segregation of indigenous (Perna perna) and invasive (Mytilus galloprovincialis) mussels in South Africa
- Zardi, Gerardo I, Nicastro, Katy R, Porri, Francesca, McQuaid, Christopher D
- Authors: Zardi, Gerardo I , Nicastro, Katy R , Porri, Francesca , McQuaid, Christopher D
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:6946 , http://hdl.handle.net/10962/d1011974
- Description: Periodical sand inundation influences diversity and distribution of intertidal species throughout the world. This study investigates the effect of sand stress on survival and on habitat segregation of the two dominant mussel species living in South Africa, the invasive Mytilus galloprovincialis and the indigenous Perna perna. P. perna occupies a lower intertidal zone which, monthly surveys over 1.5 years showed, is covered by sand for longer periods than the higher M. galloprovincialis zone. Despite this, when buried under sand, P. perna mortality rates were significantly higher than those of M. galloprovincialis in both laboratory and in field experiments. Under anoxic condition, P. perna mortality rates were still significantly higher than those for M. galloprovincialis, but both species died later than when exposed to sand burial, underlining the importance of the physical action of sand on mussel internal organs. When buried, both species accumulate sediments within the shell valves while still alive, but the quantities are much greater for P. perna. This suggests that P. perna gills are more severely damaged by sand abrasion and could explain its higher mortality rates. M. galloprovincialis has longer labial palps than P. perna, indicating a higher particle sorting ability and consequently explaining its lower mortality rates when exposed to sand in suspension. Habitat segregation is often explained by physiological tolerances, but in this case, such explanations fail. Although sand stress strongly affects the survival of the two species, it does not explain their vertical zonation. Contrary to our expectations, the species that is less well adapted to cope with sand stress maintains dominance in a habitat where such stress is high.
- Full Text:
- Date Issued: 2006
- Authors: Zardi, Gerardo I , Nicastro, Katy R , Porri, Francesca , McQuaid, Christopher D
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:6946 , http://hdl.handle.net/10962/d1011974
- Description: Periodical sand inundation influences diversity and distribution of intertidal species throughout the world. This study investigates the effect of sand stress on survival and on habitat segregation of the two dominant mussel species living in South Africa, the invasive Mytilus galloprovincialis and the indigenous Perna perna. P. perna occupies a lower intertidal zone which, monthly surveys over 1.5 years showed, is covered by sand for longer periods than the higher M. galloprovincialis zone. Despite this, when buried under sand, P. perna mortality rates were significantly higher than those of M. galloprovincialis in both laboratory and in field experiments. Under anoxic condition, P. perna mortality rates were still significantly higher than those for M. galloprovincialis, but both species died later than when exposed to sand burial, underlining the importance of the physical action of sand on mussel internal organs. When buried, both species accumulate sediments within the shell valves while still alive, but the quantities are much greater for P. perna. This suggests that P. perna gills are more severely damaged by sand abrasion and could explain its higher mortality rates. M. galloprovincialis has longer labial palps than P. perna, indicating a higher particle sorting ability and consequently explaining its lower mortality rates when exposed to sand in suspension. Habitat segregation is often explained by physiological tolerances, but in this case, such explanations fail. Although sand stress strongly affects the survival of the two species, it does not explain their vertical zonation. Contrary to our expectations, the species that is less well adapted to cope with sand stress maintains dominance in a habitat where such stress is high.
- Full Text:
- Date Issued: 2006
Security community building? : an assessment of Southern African regional integration in the post-apartheid era
- Authors: Lekhooa, Tumo
- Date: 2006
- Subjects: South Africa -- Politics and government -- 1994- , Africa, Southern -- Economic integration , National security -- Africa, Southern , Political stability -- Africa, Southern , Southern African Development Community
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2844 , http://hdl.handle.net/10962/d1005958 , South Africa -- Politics and government -- 1994- , Africa, Southern -- Economic integration , National security -- Africa, Southern , Political stability -- Africa, Southern , Southern African Development Community
- Description: The thesis traces Southern African security dimensions from the Cold War and the period of apartheid in South Africa to the post-apartheid era. It makes an attempt to investigate the prospects of Southern Africa becoming a security community and the processes and practices underlying these efforts. Using the constructivist theory approach to international relations, the thesis argues that the preoccupation with principles of sovereignty and non-interference, a lack of political will and the absence of common values that could help SADC institute binding rules and decision-making are the main blocks that prevent the region from asserting itself as a security community. All these militate against the idea of mutual accountability among SADC member states and have a negative impact on the institutional and functional capacity of SADC. This also prevents SADC from dealing with the emerging non-military human security threats in the region. In consideration of this, the thesis argues that the idea of security community building in Southern Africa remains not only a regional issue, but also requires the involvement of extra-regional actors.
- Full Text:
- Date Issued: 2006
- Authors: Lekhooa, Tumo
- Date: 2006
- Subjects: South Africa -- Politics and government -- 1994- , Africa, Southern -- Economic integration , National security -- Africa, Southern , Political stability -- Africa, Southern , Southern African Development Community
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2844 , http://hdl.handle.net/10962/d1005958 , South Africa -- Politics and government -- 1994- , Africa, Southern -- Economic integration , National security -- Africa, Southern , Political stability -- Africa, Southern , Southern African Development Community
- Description: The thesis traces Southern African security dimensions from the Cold War and the period of apartheid in South Africa to the post-apartheid era. It makes an attempt to investigate the prospects of Southern Africa becoming a security community and the processes and practices underlying these efforts. Using the constructivist theory approach to international relations, the thesis argues that the preoccupation with principles of sovereignty and non-interference, a lack of political will and the absence of common values that could help SADC institute binding rules and decision-making are the main blocks that prevent the region from asserting itself as a security community. All these militate against the idea of mutual accountability among SADC member states and have a negative impact on the institutional and functional capacity of SADC. This also prevents SADC from dealing with the emerging non-military human security threats in the region. In consideration of this, the thesis argues that the idea of security community building in Southern Africa remains not only a regional issue, but also requires the involvement of extra-regional actors.
- Full Text:
- Date Issued: 2006
Seeing the wood for the trees: the role of woody resources for the construction of gender specific household cultural artefacts in non-traditional communities in the Eastern Cape, South Africa
- Cocks, Michelle L, Bangay, Lindsey, Wiersum, K Freerk, Dold, Anthony P
- Authors: Cocks, Michelle L , Bangay, Lindsey , Wiersum, K Freerk , Dold, Anthony P
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:6823 , http://hdl.handle.net/10962/d1003830
- Description: There is a growing wealth of data capturing the direct-use values of the environment and recognition of forests and wild resources as representing ‘‘the poor man’s overcoat’’. This focus has however resulted in an emphasis on the utilitarian values of wild resources for rural livelihoods and has for the most part overlooked their cultural values. In tangent to these developments within the field of anthropology there has been increased attention directed towards the relationship between biodiversity and human diversity over the past decade. This has resulted in the recognition of what the Declaration of Belem calls an ‘inextricable link’ between biological and cultural diversity. The term bio-cultural diversity has been introduced as a concept denoting this link. Consequently there is a need for more elaborate assessments of the various ways in which different groups of people find value in biodiversity. The aim of this paper is to demonstrate the cultural significance of wild harvested plant resources for the maintenance of two gender specific cultural artefacts for amaXhosa people in South Africa, to assess the persistence of these practices in rapidly modernizing communities. We demonstrate the endurance of these ancient cultural artefacts in present-day peri-urban communities and suggest that they point to the need for improved understanding of the significance of bio-cultural diversity. The findings of the study should not be interpreted as illustrating stagnation in the traditional past, but rather as pointing at the need for improved understanding of the significance of bio-cultural diversity in a dynamic sense.
- Full Text:
- Date Issued: 2006
- Authors: Cocks, Michelle L , Bangay, Lindsey , Wiersum, K Freerk , Dold, Anthony P
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:6823 , http://hdl.handle.net/10962/d1003830
- Description: There is a growing wealth of data capturing the direct-use values of the environment and recognition of forests and wild resources as representing ‘‘the poor man’s overcoat’’. This focus has however resulted in an emphasis on the utilitarian values of wild resources for rural livelihoods and has for the most part overlooked their cultural values. In tangent to these developments within the field of anthropology there has been increased attention directed towards the relationship between biodiversity and human diversity over the past decade. This has resulted in the recognition of what the Declaration of Belem calls an ‘inextricable link’ between biological and cultural diversity. The term bio-cultural diversity has been introduced as a concept denoting this link. Consequently there is a need for more elaborate assessments of the various ways in which different groups of people find value in biodiversity. The aim of this paper is to demonstrate the cultural significance of wild harvested plant resources for the maintenance of two gender specific cultural artefacts for amaXhosa people in South Africa, to assess the persistence of these practices in rapidly modernizing communities. We demonstrate the endurance of these ancient cultural artefacts in present-day peri-urban communities and suggest that they point to the need for improved understanding of the significance of bio-cultural diversity. The findings of the study should not be interpreted as illustrating stagnation in the traditional past, but rather as pointing at the need for improved understanding of the significance of bio-cultural diversity in a dynamic sense.
- Full Text:
- Date Issued: 2006
Seeing the wood for the trees: the role of woody resources for the construction of gender specific household cultural artefacts in non-traditional communities in the Eastern Cape, South Africa
- Cocks, Michelle L, Bangay, Lindsey, Wiersum, K Freerk, Dold, Anthony P
- Authors: Cocks, Michelle L , Bangay, Lindsey , Wiersum, K Freerk , Dold, Anthony P
- Date: 2006
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/453337 , vital:75246 , https://doi.org/10.1007/s10668-006-9053-4
- Description: There is a growing wealth of data capturing the direct-use values of the environment and recognition of forests and wild resources as representing “the poor manȁ9s overcoat”. This focus has however resulted in an emphasis on the utilitarian values of wild resources for rural livelihoods and has for the most part overlooked their cultural values. In tangent to these developments within the field of anthropology there has been increased attention directed towards the relationship between biodiversity and human diversity over the past decade. This has resulted in the recognition of what the Declaration of Belem calls an ȁ8inextricable linkȁ9 between biological and cultural diversity. The term bio-cultural diversity has been introduced as a concept denoting this link. Consequently there is a need for more elaborate assessments of the various ways in which different groups of people find value in biodiversity. The aim of this paper is to demonstrate the cultural significance of wild harvested plant resources for the maintenance of two gender specific cultural artefacts for amaXhosa people in South Africa, to assess the persistence of these practices in rapidly modernizing communities. We demonstrate the endurance of these ancient cultural artefacts in present-day peri-urban communities and suggest that they point to the need for improved understanding of the significance of bio-cultural diversity. The findings of the study should not be interpreted as illustrating stagnation in the traditional past, but rather as pointing at the need for improved understanding of the significance of bio-cultural diversity in a dynamic sense.
- Full Text:
- Date Issued: 2006
- Authors: Cocks, Michelle L , Bangay, Lindsey , Wiersum, K Freerk , Dold, Anthony P
- Date: 2006
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/453337 , vital:75246 , https://doi.org/10.1007/s10668-006-9053-4
- Description: There is a growing wealth of data capturing the direct-use values of the environment and recognition of forests and wild resources as representing “the poor manȁ9s overcoat”. This focus has however resulted in an emphasis on the utilitarian values of wild resources for rural livelihoods and has for the most part overlooked their cultural values. In tangent to these developments within the field of anthropology there has been increased attention directed towards the relationship between biodiversity and human diversity over the past decade. This has resulted in the recognition of what the Declaration of Belem calls an ȁ8inextricable linkȁ9 between biological and cultural diversity. The term bio-cultural diversity has been introduced as a concept denoting this link. Consequently there is a need for more elaborate assessments of the various ways in which different groups of people find value in biodiversity. The aim of this paper is to demonstrate the cultural significance of wild harvested plant resources for the maintenance of two gender specific cultural artefacts for amaXhosa people in South Africa, to assess the persistence of these practices in rapidly modernizing communities. We demonstrate the endurance of these ancient cultural artefacts in present-day peri-urban communities and suggest that they point to the need for improved understanding of the significance of bio-cultural diversity. The findings of the study should not be interpreted as illustrating stagnation in the traditional past, but rather as pointing at the need for improved understanding of the significance of bio-cultural diversity in a dynamic sense.
- Full Text:
- Date Issued: 2006
Self-assembled monolayers (SAMs) of cobalt tetracarboxylic acidchloride phthalocyanine covalently attached onto a preformed mercaptoethanol SAM
- Mashazi, Philani N, Ozoemena, Kenneth I, Maree, David M, Nyokong, Tebello
- Authors: Mashazi, Philani N , Ozoemena, Kenneth I , Maree, David M , Nyokong, Tebello
- Date: 2006
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/283792 , vital:55989 , xlink:href="https://doi.org/10.1016/j.electacta.2005.10.004"
- Description: A feasible method of fabricating phthalocyanine sensor was developed by covalent attachment of cobalt tetracarboxylic acidchloride phthalocyanine (CoTCACIPc) onto a preformed 2-mercaptoethanol (2-ME) self-assembled monolayer (SAM) modified gold electrode (designated as CoTCACIPc-2-ME-SAM). The surface concentration of the CoTCACIPc was found to be 4.58 × 10−10 mol/cm2. The sensor gave a linear response to L-cysteine over the concentration range 0.28–20 μM with a detection limit of 5 × 10−7 M and best response time of 2 s.
- Full Text:
- Date Issued: 2006
- Authors: Mashazi, Philani N , Ozoemena, Kenneth I , Maree, David M , Nyokong, Tebello
- Date: 2006
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/283792 , vital:55989 , xlink:href="https://doi.org/10.1016/j.electacta.2005.10.004"
- Description: A feasible method of fabricating phthalocyanine sensor was developed by covalent attachment of cobalt tetracarboxylic acidchloride phthalocyanine (CoTCACIPc) onto a preformed 2-mercaptoethanol (2-ME) self-assembled monolayer (SAM) modified gold electrode (designated as CoTCACIPc-2-ME-SAM). The surface concentration of the CoTCACIPc was found to be 4.58 × 10−10 mol/cm2. The sensor gave a linear response to L-cysteine over the concentration range 0.28–20 μM with a detection limit of 5 × 10−7 M and best response time of 2 s.
- Full Text:
- Date Issued: 2006
Self-assembled monolayers and electropolymerized thin films of phthalocyanines as molecular materials for electroanalysis
- Nyokong, Tebello, Bedioui, Fethi
- Authors: Nyokong, Tebello , Bedioui, Fethi
- Date: 2006
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/283826 , vital:55994 , xlink:href="https://doi.org/10.1142/S1088424606000454"
- Description: In this review, we report on the newly developed area of research devoted to the formation of self-assembled monolayers of metallophthalocyanines by focusing on some significant examples dedicated to electroanalytical applications. We also summarize recent examples on the use of electropolymerized metallophthalocyanine films in electroanalysis. In both cases, activation and detection of thiols are the main targeted applications.
- Full Text:
- Date Issued: 2006
- Authors: Nyokong, Tebello , Bedioui, Fethi
- Date: 2006
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/283826 , vital:55994 , xlink:href="https://doi.org/10.1142/S1088424606000454"
- Description: In this review, we report on the newly developed area of research devoted to the formation of self-assembled monolayers of metallophthalocyanines by focusing on some significant examples dedicated to electroanalytical applications. We also summarize recent examples on the use of electropolymerized metallophthalocyanine films in electroanalysis. In both cases, activation and detection of thiols are the main targeted applications.
- Full Text:
- Date Issued: 2006
Self-assembled monolayers and electropolymerized thin films of phthalocyanines as molecular materials for electroanalysis
- Nyokong, Tebello, Bedioui, Fethi
- Authors: Nyokong, Tebello , Bedioui, Fethi
- Date: 2006
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/283851 , vital:55996 , xlink:href="https://doi.org/10.1142/S1088424606000454"
- Description: In this review, we report on the newly developed area of research devoted to the formation of self-assembled monolayers of metallophthalocyanines by focusing on some significant examples dedicated to electroanalytical applications. We also summarize recent examples on the use of electropolymerized metallophthalocyanine films in electroanalysis. In both cases, activation and detection of thiols are the main targeted applications.
- Full Text:
- Date Issued: 2006
- Authors: Nyokong, Tebello , Bedioui, Fethi
- Date: 2006
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/283851 , vital:55996 , xlink:href="https://doi.org/10.1142/S1088424606000454"
- Description: In this review, we report on the newly developed area of research devoted to the formation of self-assembled monolayers of metallophthalocyanines by focusing on some significant examples dedicated to electroanalytical applications. We also summarize recent examples on the use of electropolymerized metallophthalocyanine films in electroanalysis. In both cases, activation and detection of thiols are the main targeted applications.
- Full Text:
- Date Issued: 2006
Service quality perceptions among different cultures in the Nelson Mandela Metropole
- Authors: Müller, Otto
- Date: 2006
- Subjects: Service industries -- South Africa -- Nelson Mandela Metropole -- Quality control , Service industries -- Customer services -- South Africa -- Nelson Mandela Metropole , Consumer satisfaction , Service industries -- South Africa -- Nelson Mandela Metropole -- Cross cultural studies
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8763 , http://hdl.handle.net/10948/d1011687 , Service industries -- South Africa -- Nelson Mandela Metropole -- Quality control , Service industries -- Customer services -- South Africa -- Nelson Mandela Metropole , Consumer satisfaction , Service industries -- South Africa -- Nelson Mandela Metropole -- Cross cultural studies
- Description: Managing cultural differences in today’s work environment has received the attention of researchers all over the world. What has received far less attention is the managing of the cultural differences between service provider workers and customers and how this is perceived to lead to achieving great service quality. This research project focuses on the cultural differences between culturally diverse South African service provider workers and South African customers, with some reference to international customers. The questionnaire used in this research includes questions embodying the service quality instruments developed by Parasuraman, Zeithaml, and Berry (1988) and Hofstede’s (1991) cultural dimensions. The questionnaire was completed by 81 students of the East Cape Midland College in the Nelson Mandela Metropole. A Pearson’s correlation coefficient was calculated for each service quality instrument and each cultural dimension. The resulting correlation coefficients were analysed and a positive or negative correlation between each service quality instrument and each cultural dimension is shown. The implications of each positive and negative correlation are shown and how it impacts on perceived service quality delivery. The implications for service quality management are shown, followed by recommendations for the management of a culturally diverse workforce.
- Full Text:
- Date Issued: 2006
- Authors: Müller, Otto
- Date: 2006
- Subjects: Service industries -- South Africa -- Nelson Mandela Metropole -- Quality control , Service industries -- Customer services -- South Africa -- Nelson Mandela Metropole , Consumer satisfaction , Service industries -- South Africa -- Nelson Mandela Metropole -- Cross cultural studies
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8763 , http://hdl.handle.net/10948/d1011687 , Service industries -- South Africa -- Nelson Mandela Metropole -- Quality control , Service industries -- Customer services -- South Africa -- Nelson Mandela Metropole , Consumer satisfaction , Service industries -- South Africa -- Nelson Mandela Metropole -- Cross cultural studies
- Description: Managing cultural differences in today’s work environment has received the attention of researchers all over the world. What has received far less attention is the managing of the cultural differences between service provider workers and customers and how this is perceived to lead to achieving great service quality. This research project focuses on the cultural differences between culturally diverse South African service provider workers and South African customers, with some reference to international customers. The questionnaire used in this research includes questions embodying the service quality instruments developed by Parasuraman, Zeithaml, and Berry (1988) and Hofstede’s (1991) cultural dimensions. The questionnaire was completed by 81 students of the East Cape Midland College in the Nelson Mandela Metropole. A Pearson’s correlation coefficient was calculated for each service quality instrument and each cultural dimension. The resulting correlation coefficients were analysed and a positive or negative correlation between each service quality instrument and each cultural dimension is shown. The implications of each positive and negative correlation are shown and how it impacts on perceived service quality delivery. The implications for service quality management are shown, followed by recommendations for the management of a culturally diverse workforce.
- Full Text:
- Date Issued: 2006
Sidelining developmental goals? Re-imaging Port Elizabeth for the 2010 Soccer World Cup
- Authors: Baines, Gary F
- Date: 2006
- Language: English
- Type: Conference paper
- Identifier: vital:6155 , http://hdl.handle.net/10962/d1007070
- Full Text:
- Date Issued: 2006
- Authors: Baines, Gary F
- Date: 2006
- Language: English
- Type: Conference paper
- Identifier: vital:6155 , http://hdl.handle.net/10962/d1007070
- Full Text:
- Date Issued: 2006
Situated environmental learning in Southern Africa at the start of the UN decade of education for sustainable development
- O'Donoghue, Rob B, Lotz-Sisitka, Heila
- Authors: O'Donoghue, Rob B , Lotz-Sisitka, Heila
- Date: 2006
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/183059 , vital:43908 , xlink:href="https://doi.org/10.1017/S0814062600001737"
- Description: Within the globalising trajectory of modernism, conservation, then environmental (EE) and now sustainability education (ESD) have each emerged as developing responses to risk produced by and in the modern state. Through adopting a long term process perspective, this paper narrates the emergence of situated learning perspectives and a developing re-orientation of EE at the start of the United Nations Decade of Education for Sustainable Development (UNDESD). We identified the need to examine ESD practice in responses to recent ESD consultations in 14 southern African countries, where a rhetorical marking was noted in discussions on ESD practices, particularly with regard to changing teaching and learning processes. The paper narrates how an interplay of review, research and practical engagement activities have all contributed to an extended critical review of learning interactions in environmental education in an attempt to provide useful perspective for educational activities within the UNDESD. We found that EE and ESD initiatives only acquired more substantive meaning and coherent orientation when examined within ongoing inquiries into situated learning, agency and risk reduction in contexts of poverty, vulnerability and risk, the key concern to us in this paper and the primary focus of the WEHAB (Water, Energy, Health, Agriculture and Biodiversity) sustainable development agenda in the region.
- Full Text:
- Date Issued: 2006
- Authors: O'Donoghue, Rob B , Lotz-Sisitka, Heila
- Date: 2006
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/183059 , vital:43908 , xlink:href="https://doi.org/10.1017/S0814062600001737"
- Description: Within the globalising trajectory of modernism, conservation, then environmental (EE) and now sustainability education (ESD) have each emerged as developing responses to risk produced by and in the modern state. Through adopting a long term process perspective, this paper narrates the emergence of situated learning perspectives and a developing re-orientation of EE at the start of the United Nations Decade of Education for Sustainable Development (UNDESD). We identified the need to examine ESD practice in responses to recent ESD consultations in 14 southern African countries, where a rhetorical marking was noted in discussions on ESD practices, particularly with regard to changing teaching and learning processes. The paper narrates how an interplay of review, research and practical engagement activities have all contributed to an extended critical review of learning interactions in environmental education in an attempt to provide useful perspective for educational activities within the UNDESD. We found that EE and ESD initiatives only acquired more substantive meaning and coherent orientation when examined within ongoing inquiries into situated learning, agency and risk reduction in contexts of poverty, vulnerability and risk, the key concern to us in this paper and the primary focus of the WEHAB (Water, Energy, Health, Agriculture and Biodiversity) sustainable development agenda in the region.
- Full Text:
- Date Issued: 2006
SL-model for paired comparisons
- Authors: Sjölander, Morné Rowan
- Date: 2006
- Subjects: Paired comparisons (Statistics) , Mathematical statistics
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:10574 , http://hdl.handle.net/10948/605 , Paired comparisons (Statistics) , Mathematical statistics
- Description: The method of paired comparisons can be found all the way back to 1860, where Fechner made the first publication in this method, using it for his psychometric investigations [4]. Thurstone formalised the method by providing a mathematical background to it [9-11] and in 1927 the method’s birth took place with his psychometric publications, one being “a law of comparative judgment” [12-14]. The law of comparative judgment is a set of equations relating the proportion of times any stimulus k is judged greater on a given attribute than any other stimulus j to the scales and discriminal dispersions of the two stimuli on the psychological continuum. The amount of research done for discrete models of paired comparisons is not a lot. This study develops a new discrete model, the SL-model for paired comparisons. Paired comparisons data processing in which objects have an upper limit to their scores was also not yet developed, and making such a model is one of the aims of this report. The SLmodel is thus developed in this context; however, the model easily generalises to not necessarily having an upper limit on scores.
- Full Text:
- Date Issued: 2006
- Authors: Sjölander, Morné Rowan
- Date: 2006
- Subjects: Paired comparisons (Statistics) , Mathematical statistics
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:10574 , http://hdl.handle.net/10948/605 , Paired comparisons (Statistics) , Mathematical statistics
- Description: The method of paired comparisons can be found all the way back to 1860, where Fechner made the first publication in this method, using it for his psychometric investigations [4]. Thurstone formalised the method by providing a mathematical background to it [9-11] and in 1927 the method’s birth took place with his psychometric publications, one being “a law of comparative judgment” [12-14]. The law of comparative judgment is a set of equations relating the proportion of times any stimulus k is judged greater on a given attribute than any other stimulus j to the scales and discriminal dispersions of the two stimuli on the psychological continuum. The amount of research done for discrete models of paired comparisons is not a lot. This study develops a new discrete model, the SL-model for paired comparisons. Paired comparisons data processing in which objects have an upper limit to their scores was also not yet developed, and making such a model is one of the aims of this report. The SLmodel is thus developed in this context; however, the model easily generalises to not necessarily having an upper limit on scores.
- Full Text:
- Date Issued: 2006
Small-scale, nature-based tourism as a pro-poor development intervention : two examples in Kwazulu-Natal, South Africa
- Hill, Trevor R, Nel, Etienne L, Trotter, D
- Authors: Hill, Trevor R , Nel, Etienne L , Trotter, D
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:6687 , http://hdl.handle.net/10962/d1006689
- Description: Tourism is widely acknowledged as a key economic sector that has the potential to contribute to national and local development and, more specifically, serve as a mechanism to promote poverty alleviation and pro-poor development within a particular locality. In countries of the global South, nature-based tourism initiatives can make a meaningful impact on the livelihoods of the poor, in particular the subsistence based rural poor. Taking two examples in KwaZulu-Natal Province, South Africa, where small-scale tourism initiatives were developed recently in response to existing natural attractions in the context of coping with local economic crises, this paper broadly assesses the modest benefits to date, as well as drawbacks, in improving conditions of life.
- Full Text:
- Date Issued: 2006
- Authors: Hill, Trevor R , Nel, Etienne L , Trotter, D
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:6687 , http://hdl.handle.net/10962/d1006689
- Description: Tourism is widely acknowledged as a key economic sector that has the potential to contribute to national and local development and, more specifically, serve as a mechanism to promote poverty alleviation and pro-poor development within a particular locality. In countries of the global South, nature-based tourism initiatives can make a meaningful impact on the livelihoods of the poor, in particular the subsistence based rural poor. Taking two examples in KwaZulu-Natal Province, South Africa, where small-scale tourism initiatives were developed recently in response to existing natural attractions in the context of coping with local economic crises, this paper broadly assesses the modest benefits to date, as well as drawbacks, in improving conditions of life.
- Full Text:
- Date Issued: 2006
Software quality assurance in a remote client/contractor context
- Authors: Black, Angus Hugh
- Date: 2006
- Subjects: Computer software -- Quality control , Software engineering , Information technology
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4648 , http://hdl.handle.net/10962/d1006615 , Computer software -- Quality control , Software engineering , Information technology
- Description: With the reliance on information technology and the software that this technology utilizes increasing every day, it is of paramount importance that software developed be of an acceptable quality. This quality can be achieved through the utilization of various software engineering standards and guidelines. The question is, to what extent do these standards and guidelines need to be utilized and how are these standards and guidelines implemented? This research focuses on how guidelines developed by standardization bodies and the unified process developed by Rational can be integrated to achieve a suitable process and version control system within the context of a remote client/contractor small team environment.
- Full Text:
- Date Issued: 2006
- Authors: Black, Angus Hugh
- Date: 2006
- Subjects: Computer software -- Quality control , Software engineering , Information technology
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4648 , http://hdl.handle.net/10962/d1006615 , Computer software -- Quality control , Software engineering , Information technology
- Description: With the reliance on information technology and the software that this technology utilizes increasing every day, it is of paramount importance that software developed be of an acceptable quality. This quality can be achieved through the utilization of various software engineering standards and guidelines. The question is, to what extent do these standards and guidelines need to be utilized and how are these standards and guidelines implemented? This research focuses on how guidelines developed by standardization bodies and the unified process developed by Rational can be integrated to achieve a suitable process and version control system within the context of a remote client/contractor small team environment.
- Full Text:
- Date Issued: 2006
South Africa and the International Criminal Court: investigating the link between complimentarity and implementation
- Authors: Kulundu, Kenneth Wanyama
- Date: 2006
- Subjects: International Criminal Court , International criminal courts , International crimes , International law -- South Africa , South Africa -- Law and legislation
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: vital:3679 , http://hdl.handle.net/10962/d1003194 , International Criminal Court , International criminal courts , International crimes , International law -- South Africa , South Africa -- Law and legislation
- Description: Complementarity, the organizing principle of the International Criminal Court (ICC), is a largely untested concept in terms of its ability to instigate State compliance with the Rome Statute of the International Criminal Court. The ICC made its debut at a time when States were routinely accused of non-compliance with international law, particularly international criminal law. Due to perennial concerns over the protection of State sovereignty, an ingenious system of allocation of competencies between States and the ICC was evolved. This is embodied by the principle of complementarity. At the heart of complementarity is an arrangement by which States Parties to the Rome Statute of the ICC are regarded as the prime fora for the prosecution of crimes of grave concern to the international community. In the event of inaction, however, the ICC is mandated to wrest specific cases from the jurisdiction of national courts and try them. In effect, a carrot-and-stick mechanism has been built into the Rome Statute to induce States to comply with the Statute. This thesis examines the principle of complementarity from a theoretical perspective, bearing in mind contemporary international law structures and institutions. A better understanding of the theoretical assumptions of complementarity, it is suggested, will foster a more effective application of the tenets of the Rome Statute within the municipal system. The thesis argues that complementarity is a catalyst for implementation of the Rome Statute only to the extent to which it alters or re-defines well established and encumbering procedures and norms within the municipal system. In this regard, although South Africa’s status of constitutional democracy may be reason to expect that the obligations imposed by the Rome Statute will be observed, that very fact may increase the inclination to preserve the “baseline of conduct” rather than be swayed by the Rome Statute. An illustrative excursion into South African rules and norms is undertaken, after which the argument is advanced that not much change has been effected to the South African legal landscape through implementation of the Rome Statute. The sole exception to this is the issue of prosecutorial discretion. On this, the South African legislature has uniquely crafted a mechanism for ensuring accountability, presumably with a view to ensuring that South Africa is always able to prosecute the crimes concerned. However, the thesis cautions against complacency, arguing that the tension between national law and international obligations may yet play itself out, owing to insufficient attention to the role of national courts in giving effect to the Rome Statute. The act of implementation may be a response to stimuli such as the perceived need to avoid civil liability for international crimes, or the general inertia of implementing human rights instruments. Therefore, the carrot-and-stick mechanism may be lacking in the compulsive qualities it is presumed to have. Through an exploratory survey of South African law, the thesis illustrates that prosecutorial accountability is the major factor in determining whether a State has fully complied with is obligations under the Rome Statute. However, it also points out that the way courts of law apply the new norms in municipal systems in the future will be crucial.
- Full Text:
- Date Issued: 2006
- Authors: Kulundu, Kenneth Wanyama
- Date: 2006
- Subjects: International Criminal Court , International criminal courts , International crimes , International law -- South Africa , South Africa -- Law and legislation
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: vital:3679 , http://hdl.handle.net/10962/d1003194 , International Criminal Court , International criminal courts , International crimes , International law -- South Africa , South Africa -- Law and legislation
- Description: Complementarity, the organizing principle of the International Criminal Court (ICC), is a largely untested concept in terms of its ability to instigate State compliance with the Rome Statute of the International Criminal Court. The ICC made its debut at a time when States were routinely accused of non-compliance with international law, particularly international criminal law. Due to perennial concerns over the protection of State sovereignty, an ingenious system of allocation of competencies between States and the ICC was evolved. This is embodied by the principle of complementarity. At the heart of complementarity is an arrangement by which States Parties to the Rome Statute of the ICC are regarded as the prime fora for the prosecution of crimes of grave concern to the international community. In the event of inaction, however, the ICC is mandated to wrest specific cases from the jurisdiction of national courts and try them. In effect, a carrot-and-stick mechanism has been built into the Rome Statute to induce States to comply with the Statute. This thesis examines the principle of complementarity from a theoretical perspective, bearing in mind contemporary international law structures and institutions. A better understanding of the theoretical assumptions of complementarity, it is suggested, will foster a more effective application of the tenets of the Rome Statute within the municipal system. The thesis argues that complementarity is a catalyst for implementation of the Rome Statute only to the extent to which it alters or re-defines well established and encumbering procedures and norms within the municipal system. In this regard, although South Africa’s status of constitutional democracy may be reason to expect that the obligations imposed by the Rome Statute will be observed, that very fact may increase the inclination to preserve the “baseline of conduct” rather than be swayed by the Rome Statute. An illustrative excursion into South African rules and norms is undertaken, after which the argument is advanced that not much change has been effected to the South African legal landscape through implementation of the Rome Statute. The sole exception to this is the issue of prosecutorial discretion. On this, the South African legislature has uniquely crafted a mechanism for ensuring accountability, presumably with a view to ensuring that South Africa is always able to prosecute the crimes concerned. However, the thesis cautions against complacency, arguing that the tension between national law and international obligations may yet play itself out, owing to insufficient attention to the role of national courts in giving effect to the Rome Statute. The act of implementation may be a response to stimuli such as the perceived need to avoid civil liability for international crimes, or the general inertia of implementing human rights instruments. Therefore, the carrot-and-stick mechanism may be lacking in the compulsive qualities it is presumed to have. Through an exploratory survey of South African law, the thesis illustrates that prosecutorial accountability is the major factor in determining whether a State has fully complied with is obligations under the Rome Statute. However, it also points out that the way courts of law apply the new norms in municipal systems in the future will be crucial.
- Full Text:
- Date Issued: 2006
South Africa's chemical and biological warfare programme 1981-1995
- Authors: Gould, Chandré
- Date: 2006
- Subjects: Basson, Wouter, 1950- Basson, Wouter, 1950 -- Trials, litigation, etc Biological warfare -- South Africa Chemical warfare -- South Africa Trials (Political crimes and offenses) -- South Africa South Africa -- Politics and government -- History
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:2544 , http://hdl.handle.net/10962/d1002396
- Description: In 1981 the apartheid military initiated a chemical and biological warfare (CBW) programme (code-named Project Coast). The programme, terminated in 1993, was aimed at developing novel irritating and incapacitating agents for internal and external use, covert assassination weapons for use against apartheid opponents, and defensive equipment for use by South African Defence Force (SADF) troops in Angola. The CBW programme was driven by a single individual, Dr Wouter Basson, who reported to a military management committee (the Co-ordinating Management Committee) which comprised a select group of high ranking officers. Practical and financial oversight of the programme was weak which allowed both for the abuse of programme funds and for senior military officers to deny knowledge of aspects of the programme. The biological component of Project Coast was conducted in violation of the commitments of the South African government to the Biological and Toxins Weapons Convention (BTWC). While the state’s commitment to the BTWC was one of the factors considered when initiating the programme, it was not a sufficient constraint to prevent the development of the biological weapons programme, but rather influenced its structure such that the programme could avoid national and international detection. Despite efforts to conceal the military front companies where the chemical and biological warfare (CBW) research and development was undertaken, evidence presented in this thesis shows that the United States had sufficient information about the programme to have been aware of its existence. Yet, it was only in 1993, on the eve of the democratic election in South Africa, that any attempt was made by the US administration to pressure the government to terminate the programme. This thesis considers the factors which influenced the decision to develop Project Coast; the structure and nature of the programme; the motivations of scientists to become involved in the programme and remain involved; the use of chemical and biological agents against opponents of the state, and the factors which influenced the termination of the programme on the eve of the first democratic elections in 1994. It also considers the nature and exent of international support, both tacit and overt, for the programme and argues that the failure of Western nations to call for the termination of the programme before the early 1990s was a function of political expediency and indicates a significant weakness in the ability of international agreements to constrain the development of such programmes.
- Full Text:
- Date Issued: 2006
- Authors: Gould, Chandré
- Date: 2006
- Subjects: Basson, Wouter, 1950- Basson, Wouter, 1950 -- Trials, litigation, etc Biological warfare -- South Africa Chemical warfare -- South Africa Trials (Political crimes and offenses) -- South Africa South Africa -- Politics and government -- History
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:2544 , http://hdl.handle.net/10962/d1002396
- Description: In 1981 the apartheid military initiated a chemical and biological warfare (CBW) programme (code-named Project Coast). The programme, terminated in 1993, was aimed at developing novel irritating and incapacitating agents for internal and external use, covert assassination weapons for use against apartheid opponents, and defensive equipment for use by South African Defence Force (SADF) troops in Angola. The CBW programme was driven by a single individual, Dr Wouter Basson, who reported to a military management committee (the Co-ordinating Management Committee) which comprised a select group of high ranking officers. Practical and financial oversight of the programme was weak which allowed both for the abuse of programme funds and for senior military officers to deny knowledge of aspects of the programme. The biological component of Project Coast was conducted in violation of the commitments of the South African government to the Biological and Toxins Weapons Convention (BTWC). While the state’s commitment to the BTWC was one of the factors considered when initiating the programme, it was not a sufficient constraint to prevent the development of the biological weapons programme, but rather influenced its structure such that the programme could avoid national and international detection. Despite efforts to conceal the military front companies where the chemical and biological warfare (CBW) research and development was undertaken, evidence presented in this thesis shows that the United States had sufficient information about the programme to have been aware of its existence. Yet, it was only in 1993, on the eve of the democratic election in South Africa, that any attempt was made by the US administration to pressure the government to terminate the programme. This thesis considers the factors which influenced the decision to develop Project Coast; the structure and nature of the programme; the motivations of scientists to become involved in the programme and remain involved; the use of chemical and biological agents against opponents of the state, and the factors which influenced the termination of the programme on the eve of the first democratic elections in 1994. It also considers the nature and exent of international support, both tacit and overt, for the programme and argues that the failure of Western nations to call for the termination of the programme before the early 1990s was a function of political expediency and indicates a significant weakness in the ability of international agreements to constrain the development of such programmes.
- Full Text:
- Date Issued: 2006
Spatio-temporal patterns in maturation of the chokka squid (Loligo vulgaris reynaudii) off the coast of South Africa
- Olyott, L J H, Sauer, Warwick H H, Booth, Anthony J
- Authors: Olyott, L J H , Sauer, Warwick H H , Booth, Anthony J
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:6763 , http://hdl.handle.net/10962/d1007930
- Description: Knowledge of the temporal and spatial characteristics of chokka squid (Loligo vulgaris reynaudii) biology in South African waters is limited, so the possibility of there being a geographically fragmented stock was examined by investigating the distribution of maturity patterns for the species, covering all known spawning areas and using both historical and recent data. Gonadosomatic indices (GSI) varied between year-round consistency and apparent seasonal peaks in both summer and winter; there was no clear spatial pattern. Monthly percentage maturity provided further evidence for two peak reproductive periods each year, although mature squid were present throughout. Sex ratios demonstrated great variability between different areas and life history stages. Male-biased sex ratios were only apparent on the inshore spawning grounds and ranged between 1.118:1 and 4.267:1. Size at sexual maturity was also seasonal, squid maturing smaller in winter/spring than in summer/autumn. Also, squid in the east matured smaller than squid in the west. Although the results from the present study do not provide conclusive evidence of distinct geographic populations, squid likely spawn over a significantly larger area of the Agulhas Bank than previously estimated, and squid on the west coast of South Africa may return to spawn on the western portion of the Agulhas Bank. It remains likely, however, that the east and west coast populations are a single stock and that migration of juveniles to the west coast and their subsequent return as sub-adults is an integral but non-essential and variable part of the life history.
- Full Text:
- Date Issued: 2006
- Authors: Olyott, L J H , Sauer, Warwick H H , Booth, Anthony J
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:6763 , http://hdl.handle.net/10962/d1007930
- Description: Knowledge of the temporal and spatial characteristics of chokka squid (Loligo vulgaris reynaudii) biology in South African waters is limited, so the possibility of there being a geographically fragmented stock was examined by investigating the distribution of maturity patterns for the species, covering all known spawning areas and using both historical and recent data. Gonadosomatic indices (GSI) varied between year-round consistency and apparent seasonal peaks in both summer and winter; there was no clear spatial pattern. Monthly percentage maturity provided further evidence for two peak reproductive periods each year, although mature squid were present throughout. Sex ratios demonstrated great variability between different areas and life history stages. Male-biased sex ratios were only apparent on the inshore spawning grounds and ranged between 1.118:1 and 4.267:1. Size at sexual maturity was also seasonal, squid maturing smaller in winter/spring than in summer/autumn. Also, squid in the east matured smaller than squid in the west. Although the results from the present study do not provide conclusive evidence of distinct geographic populations, squid likely spawn over a significantly larger area of the Agulhas Bank than previously estimated, and squid on the west coast of South Africa may return to spawn on the western portion of the Agulhas Bank. It remains likely, however, that the east and west coast populations are a single stock and that migration of juveniles to the west coast and their subsequent return as sub-adults is an integral but non-essential and variable part of the life history.
- Full Text:
- Date Issued: 2006
Spatio-temporal variability of larval abundance and settlement of Perna perna: differential delivery of mussels
- Porri, Francesca, McQuaid, Christopher D, Radloff, Sarah E
- Authors: Porri, Francesca , McQuaid, Christopher D , Radloff, Sarah E
- Date: 2006
- Language: English
- Type: text , Article
- Identifier: vital:6877 , http://hdl.handle.net/10962/d1011625 , http://dx.doi.org/10.3354/meps315141
- Description: We examined larval availability and settlement of the intertidal mussel Perna perna simultaneously at different spatial and temporal scales using a nested design at 2 sites, 3 km apart on the south coast of South Africa. Each site had 3 locations (300 m apart) where 5 artificial settler collectors were placed about 20 cm apart. Collectors were replaced on temporal scales varying from fortnightly (for 16 mo) to daily (2 series of 15 to 20 d). Each intertidal location was paired with an inshore location (these too were 300 m apart) within 500 m of the shore, where larval availability was measured by 3 vertical plankton hauls collected on the same dates as for settler sampling. There was strong temporal variation in abundances of larvae and settlers, and no correlation (r always < 0.14) was found between the two. Larvae were abundant only at the start of sampling and rare for the rest of the study, while distinct peaks in settler numbers occurred later. No spatial effect was detected for larval availability, while there was strong spatial variation in settlement at the location level. These results indicate that, on scales of 100s of m to km, delivery of larvae from the nearshore water column onto the shore is strongly differential, with some locations consistently receiving more settlers than others. We conclude that, at these sites, the patchiness in settlement observed on scales of 100s of m depends on differential delivery, rather than differential offshore distribution of larvae. We suggest that differential delivery is due to the effect of nearshore bottom topography on local hydrodynamics.
- Full Text:
- Date Issued: 2006
- Authors: Porri, Francesca , McQuaid, Christopher D , Radloff, Sarah E
- Date: 2006
- Language: English
- Type: text , Article
- Identifier: vital:6877 , http://hdl.handle.net/10962/d1011625 , http://dx.doi.org/10.3354/meps315141
- Description: We examined larval availability and settlement of the intertidal mussel Perna perna simultaneously at different spatial and temporal scales using a nested design at 2 sites, 3 km apart on the south coast of South Africa. Each site had 3 locations (300 m apart) where 5 artificial settler collectors were placed about 20 cm apart. Collectors were replaced on temporal scales varying from fortnightly (for 16 mo) to daily (2 series of 15 to 20 d). Each intertidal location was paired with an inshore location (these too were 300 m apart) within 500 m of the shore, where larval availability was measured by 3 vertical plankton hauls collected on the same dates as for settler sampling. There was strong temporal variation in abundances of larvae and settlers, and no correlation (r always < 0.14) was found between the two. Larvae were abundant only at the start of sampling and rare for the rest of the study, while distinct peaks in settler numbers occurred later. No spatial effect was detected for larval availability, while there was strong spatial variation in settlement at the location level. These results indicate that, on scales of 100s of m to km, delivery of larvae from the nearshore water column onto the shore is strongly differential, with some locations consistently receiving more settlers than others. We conclude that, at these sites, the patchiness in settlement observed on scales of 100s of m depends on differential delivery, rather than differential offshore distribution of larvae. We suggest that differential delivery is due to the effect of nearshore bottom topography on local hydrodynamics.
- Full Text:
- Date Issued: 2006
Sperm morphology in five species of cicadettine cicadas (Hemiptera: Cicadomorpha: Cicadidae)
- Chawanji, A S, Hodgson, Alan N, Villet, Martin H
- Authors: Chawanji, A S , Hodgson, Alan N , Villet, Martin H
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:6930 , http://hdl.handle.net/10962/d1011948
- Description: Mature spermatozoa from five species of cicadas of the subfamily Cicadettinae (Quintilia wealei, Melampsalta leucoptera, Stagira simplex, Xosopsaltria thunbergi and Monomatapa matoposa) were examined by light and electron microscopy. In each species sperm are elongate, aggregated into organized bundles with their heads embedded in a homogenous matrix to form spermatodesmata, and exhibit polymegaly. The head of the sperm consist of an anteriorly positioned conical acrosome that has a tubular substructure and a deep, posterior invagination that forms the subacrosomal space (eccentrically positioned anteriorly). The acrosome is flattened anteriorly; posteriorly it extends along either side of the nucleus as two tubular processes that gradually decrease in diameter. The filiform nucleus tapers anteriorly and intrudes into the subscrosomal space. Posteriorly the nucleus has a lateral invagination that houses material of the so-called centriolar adjunct. Posterior to the centriolar adjuct and the nucleus are two crystalline mitochondrial derivatives and a centriole, respectively, the latter giving rise to the axoneme, which has a 9 + 9 + 2 arrangement of microtubules. In these respects the sperm are similar to those of platypleurine cicadas. However, some features seem unique to cicadettines, including the structural organization of an enlarged centriolar adjunct and the dimensions of the tails. The enlarged centriolar adjunct has a lamella-like substructure and can be considered a synapomorphic character in the Cicadettinae. It is, therefore, potentially useful in the separation of this subfamily from the Cicadinae. In addition, the great length of the sperm nucleus of long-headed sperm in M. matoposa could be a synapomorphy of this genus and related taphurine and cicadettine species.
- Full Text:
- Date Issued: 2006
- Authors: Chawanji, A S , Hodgson, Alan N , Villet, Martin H
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:6930 , http://hdl.handle.net/10962/d1011948
- Description: Mature spermatozoa from five species of cicadas of the subfamily Cicadettinae (Quintilia wealei, Melampsalta leucoptera, Stagira simplex, Xosopsaltria thunbergi and Monomatapa matoposa) were examined by light and electron microscopy. In each species sperm are elongate, aggregated into organized bundles with their heads embedded in a homogenous matrix to form spermatodesmata, and exhibit polymegaly. The head of the sperm consist of an anteriorly positioned conical acrosome that has a tubular substructure and a deep, posterior invagination that forms the subacrosomal space (eccentrically positioned anteriorly). The acrosome is flattened anteriorly; posteriorly it extends along either side of the nucleus as two tubular processes that gradually decrease in diameter. The filiform nucleus tapers anteriorly and intrudes into the subscrosomal space. Posteriorly the nucleus has a lateral invagination that houses material of the so-called centriolar adjunct. Posterior to the centriolar adjuct and the nucleus are two crystalline mitochondrial derivatives and a centriole, respectively, the latter giving rise to the axoneme, which has a 9 + 9 + 2 arrangement of microtubules. In these respects the sperm are similar to those of platypleurine cicadas. However, some features seem unique to cicadettines, including the structural organization of an enlarged centriolar adjunct and the dimensions of the tails. The enlarged centriolar adjunct has a lamella-like substructure and can be considered a synapomorphic character in the Cicadettinae. It is, therefore, potentially useful in the separation of this subfamily from the Cicadinae. In addition, the great length of the sperm nucleus of long-headed sperm in M. matoposa could be a synapomorphy of this genus and related taphurine and cicadettine species.
- Full Text:
- Date Issued: 2006