Identification of a uniquely southern African clade of coastal pipefishes Syngnathus spp.
- Mwale, Monica, Kaiser, Horst, Barker, Nigel P, Wilson, A B, Teske, Peter R
- Authors: Mwale, Monica , Kaiser, Horst , Barker, Nigel P , Wilson, A B , Teske, Peter R
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/445499 , vital:74393 , https://doi.org/10.1111/jfb.12130
- Description: The taxonomic status of two southern African coastal pipefish species, Syngnathus temminckii and Syngnathus watermeyeri, was investigated using a combination of morphological and genetic data. Morphological data showed that S. temminckii is distinct from the broadly distributed European pipefish Syngnathus acus, and a molecular phylogeny reconstructed using mitochondrial DNA recovered S. temminckii and S. watermeyeri as sister taxa. The southern African species share an evolutionary origin with north‐eastern Atlantic Ocean and Mediterranean Sea species, including S. acus. These data support the existence of a distinct southern African clade of Syngnathus pipefishes that has diverged in situ to form the two species present in the region today.
- Full Text:
- Date Issued: 2013
- Authors: Mwale, Monica , Kaiser, Horst , Barker, Nigel P , Wilson, A B , Teske, Peter R
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/445499 , vital:74393 , https://doi.org/10.1111/jfb.12130
- Description: The taxonomic status of two southern African coastal pipefish species, Syngnathus temminckii and Syngnathus watermeyeri, was investigated using a combination of morphological and genetic data. Morphological data showed that S. temminckii is distinct from the broadly distributed European pipefish Syngnathus acus, and a molecular phylogeny reconstructed using mitochondrial DNA recovered S. temminckii and S. watermeyeri as sister taxa. The southern African species share an evolutionary origin with north‐eastern Atlantic Ocean and Mediterranean Sea species, including S. acus. These data support the existence of a distinct southern African clade of Syngnathus pipefishes that has diverged in situ to form the two species present in the region today.
- Full Text:
- Date Issued: 2013
Identity and origins of introduced and native Azolla species in Florida
- Madeira, Paul T, Center, Ted D, Coetzee, Julie A, Pemberton, Robert W, Purcell, Matthew F, Hill, Martin P
- Authors: Madeira, Paul T , Center, Ted D , Coetzee, Julie A , Pemberton, Robert W , Purcell, Matthew F , Hill, Martin P
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/419313 , vital:71634 , xlink:href="https://doi.org/10.1016/j.aquabot.2013.07.009"
- Description: Azolla pinnata, an introduced aquatic fern, is spreading rapidly causing concern that it may displace native Azolla. It is now present in the Arthur R. Marshall Loxahatchee National Wildlife Refuge, the northernmost portion of the Florida Everglades. Because A. pinnata subspecies are native to Africa, Southeast Asia, and Australia, determining the actual geographic origin of the Florida exotic is important to the discovery of efficacious biological control agents. Both the exotic and native Azollas were examined using morphological and molecular criteria. Both criteria distinguished three A. pinnata subspecies with the Florida exotic matching the Australian A. pinnata subsp. pinnata. Molecular divergence between the A. pinnata subspecies indicates the three types should be considered separate species. The Florida native was characterized by both molecular and morphological methods as Azolla caroliniana. The discovery of a previously uncharacterized Ecuadorian Azolla, which appears to be a paternal ancestor of A. caroliniana, indicates that A. caroliniana is a hybrid species.
- Full Text:
- Date Issued: 2013
- Authors: Madeira, Paul T , Center, Ted D , Coetzee, Julie A , Pemberton, Robert W , Purcell, Matthew F , Hill, Martin P
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/419313 , vital:71634 , xlink:href="https://doi.org/10.1016/j.aquabot.2013.07.009"
- Description: Azolla pinnata, an introduced aquatic fern, is spreading rapidly causing concern that it may displace native Azolla. It is now present in the Arthur R. Marshall Loxahatchee National Wildlife Refuge, the northernmost portion of the Florida Everglades. Because A. pinnata subspecies are native to Africa, Southeast Asia, and Australia, determining the actual geographic origin of the Florida exotic is important to the discovery of efficacious biological control agents. Both the exotic and native Azollas were examined using morphological and molecular criteria. Both criteria distinguished three A. pinnata subspecies with the Florida exotic matching the Australian A. pinnata subsp. pinnata. Molecular divergence between the A. pinnata subspecies indicates the three types should be considered separate species. The Florida native was characterized by both molecular and morphological methods as Azolla caroliniana. The discovery of a previously uncharacterized Ecuadorian Azolla, which appears to be a paternal ancestor of A. caroliniana, indicates that A. caroliniana is a hybrid species.
- Full Text:
- Date Issued: 2013
Impact of insecticides on the reproductive potential of false codling moth, Thaumatotibia leucotreta (Meyrick, 1913)(Lepidoptera: Tortricidae)
- Authors: Fullard, T , Hill, Martin P
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/406092 , vital:70238 , xlink:href="https://hdl.handle.net/10520/EJC141302"
- Description: False codling moth, Thaumatotibia leucotreta(Meyrick, 1913) (Lepidoptera: Tortricidae), is animportant pest on citrus in South Africa. Several new insecticides were screened for theirpotential negative impacts onT. leucotreta’s reproduction through topical insecticide applica-tions and detached fruit bioassays. Detached fruit bioassays showed that the registeredstandard concentration of Delegate®20 g/100 l and DPX-HGW86 35 ml/100 l caused femalesto oviposit significantly fewer eggs (P= 0.0016) than the controls. The same was found forthe registered concentration of Coragen® (P is less than 0.0001). Topical insecticide trials showed thatonly concentrations of Coragen®, at the registered field rate and above had an effect on themoths’ reproductive output (P is less than 0.0001). Alsystin®and Meothrin™, which were used asindustry standards, did not negatively affect the reproductive output of the moths duringtopical or detached fruit bioassay trials. This study helps to better understand the impor-tance of the application mode,i.e.directly on moths or fruit and implies secondary benefits tosome insecticide applications.
- Full Text:
- Date Issued: 2013
- Authors: Fullard, T , Hill, Martin P
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/406092 , vital:70238 , xlink:href="https://hdl.handle.net/10520/EJC141302"
- Description: False codling moth, Thaumatotibia leucotreta(Meyrick, 1913) (Lepidoptera: Tortricidae), is animportant pest on citrus in South Africa. Several new insecticides were screened for theirpotential negative impacts onT. leucotreta’s reproduction through topical insecticide applica-tions and detached fruit bioassays. Detached fruit bioassays showed that the registeredstandard concentration of Delegate®20 g/100 l and DPX-HGW86 35 ml/100 l caused femalesto oviposit significantly fewer eggs (P= 0.0016) than the controls. The same was found forthe registered concentration of Coragen® (P is less than 0.0001). Topical insecticide trials showed thatonly concentrations of Coragen®, at the registered field rate and above had an effect on themoths’ reproductive output (P is less than 0.0001). Alsystin®and Meothrin™, which were used asindustry standards, did not negatively affect the reproductive output of the moths duringtopical or detached fruit bioassay trials. This study helps to better understand the impor-tance of the application mode,i.e.directly on moths or fruit and implies secondary benefits tosome insecticide applications.
- Full Text:
- Date Issued: 2013
Impacts of a sub-lethal dose of glyphosate on water hyacinth nutrients and its indirect effects on Neochetina weevils
- Katembo, Naweji, Hill, Martin P, Byrne, Marcus J
- Authors: Katembo, Naweji , Hill, Martin P , Byrne, Marcus J
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/417726 , vital:71481 , xlink:href="https://doi.org/10.1080/09583157.2013.839982"
- Description: A sub-lethal dose of a herbicide under field conditions was applied to determine if it stimulates an increase in water hyacinth nutrients, thereby increasing feeding intensity by Neochetina spp. weevils used as biocontrol agents of the weed. Nitrogen (N) and carbon (C) were measured and compared between sprayed plants and control plants. At one site (Delta Park), N levels were lower in the sprayed plants compared to the control plants both in the leaves and the crown. At the second site (Farm Dam), leaf N was also lower in the sprayed plants than in the control plants, while no difference was found in crown N. Mean number of feeding scars per cm2 at Delta Park was significantly higher on the sprayed plants compared to the control plants, while no significant difference was found at Farm Dam. At Delta Park, there was no correlation, however, between the number of weevil feeding scars and leaf N or C:N ratio in sprayed plants. In conclusion, the sub-lethal dose of glyphosate did not directly result in an increase in weevil feeding intensity but it can be recommended in an integrated control system to retard water hyacinth growth while conserving the weevil population.
- Full Text:
- Date Issued: 2013
- Authors: Katembo, Naweji , Hill, Martin P , Byrne, Marcus J
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/417726 , vital:71481 , xlink:href="https://doi.org/10.1080/09583157.2013.839982"
- Description: A sub-lethal dose of a herbicide under field conditions was applied to determine if it stimulates an increase in water hyacinth nutrients, thereby increasing feeding intensity by Neochetina spp. weevils used as biocontrol agents of the weed. Nitrogen (N) and carbon (C) were measured and compared between sprayed plants and control plants. At one site (Delta Park), N levels were lower in the sprayed plants compared to the control plants both in the leaves and the crown. At the second site (Farm Dam), leaf N was also lower in the sprayed plants than in the control plants, while no difference was found in crown N. Mean number of feeding scars per cm2 at Delta Park was significantly higher on the sprayed plants compared to the control plants, while no significant difference was found at Farm Dam. At Delta Park, there was no correlation, however, between the number of weevil feeding scars and leaf N or C:N ratio in sprayed plants. In conclusion, the sub-lethal dose of glyphosate did not directly result in an increase in weevil feeding intensity but it can be recommended in an integrated control system to retard water hyacinth growth while conserving the weevil population.
- Full Text:
- Date Issued: 2013
Implementation of AES-64 connection management for Ethernet Audio/Video Bridging devices
- Dibley, James, Foss, Richard
- Authors: Dibley, James , Foss, Richard
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/426875 , vital:72397 , https://www.aes.org/e-lib/online/browse.cfm?elib=17014
- Description: AES-64 is a standard for the discovery, enumeration, connection management, and control of multimedia network devices. This paper describes the implementation of an AES-64 protocol stack and control application on devices that support the IEEE Ethernet Audio/Video Bridging standards for streaming multimedia, enabling connection management of network audio streams.
- Full Text:
- Date Issued: 2013
- Authors: Dibley, James , Foss, Richard
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/426875 , vital:72397 , https://www.aes.org/e-lib/online/browse.cfm?elib=17014
- Description: AES-64 is a standard for the discovery, enumeration, connection management, and control of multimedia network devices. This paper describes the implementation of an AES-64 protocol stack and control application on devices that support the IEEE Ethernet Audio/Video Bridging standards for streaming multimedia, enabling connection management of network audio streams.
- Full Text:
- Date Issued: 2013
In search of the Holy Grail: youth media consumption and the construction of citizenship
- Authors: Steenveld, Lynette N
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/158597 , vital:40210 , https://hdl.handle.net/10520/EJC141601
- Description: Rather than support the democratic process, as in the ideal scheme of things it should be doing, journalism has become an alienating, cynicism-inducing, narcoticising force in our political culture, turning people off citizenship rather than equipping them to fulfil their democratic potential.
- Full Text:
- Date Issued: 2013
- Authors: Steenveld, Lynette N
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/158597 , vital:40210 , https://hdl.handle.net/10520/EJC141601
- Description: Rather than support the democratic process, as in the ideal scheme of things it should be doing, journalism has become an alienating, cynicism-inducing, narcoticising force in our political culture, turning people off citizenship rather than equipping them to fulfil their democratic potential.
- Full Text:
- Date Issued: 2013
Influence of nanoparticle materials on the photophysical behavior of phthalocyanines
- Nyokong, Tebello, Antunes, Edith M
- Authors: Nyokong, Tebello , Antunes, Edith M
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/190450 , vital:44995 , xlink:href="https://doi.org/10.1016/j.ccr.2013.03.016"
- Description: This review presents recent data on the photophysical behavior of phthalocyanines when conjugated to quantum dots, gold and magnetic nanoparticles. In some cases such conjugates offer the possibility of being used in “combination therapy”, where two or more substances may be used for treating one disease. The review focuses on the effect that the presence of nanoparticles has on the excited and triplet state parameters of the phthalocyanines. Five tables listing these parameters are presented.
- Full Text:
- Date Issued: 2013
- Authors: Nyokong, Tebello , Antunes, Edith M
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/190450 , vital:44995 , xlink:href="https://doi.org/10.1016/j.ccr.2013.03.016"
- Description: This review presents recent data on the photophysical behavior of phthalocyanines when conjugated to quantum dots, gold and magnetic nanoparticles. In some cases such conjugates offer the possibility of being used in “combination therapy”, where two or more substances may be used for treating one disease. The review focuses on the effect that the presence of nanoparticles has on the excited and triplet state parameters of the phthalocyanines. Five tables listing these parameters are presented.
- Full Text:
- Date Issued: 2013
Inkcubeko Nendalo: a bio-cultural diversity schools education project in South Africa and its implications for inclusive Indigenous Knowledge Systems (IKS) Sustainability.
- Cocks, Michelle L, Alexander, Jamie K, Dold, Anthony P
- Authors: Cocks, Michelle L , Alexander, Jamie K , Dold, Anthony P
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/141187 , vital:37951 , DOI: 10.1177/0973408212475232
- Description: South Africa is currently the world’s third most biodiverse country, with one of the highest concentrations of threatened biodiversity in the world. Emerging research reveals the increasing pressure on this biodiversity with many wild resources continuing to be utilised for livelihood purposes even within urban environments. The Rio conventions, particularly the CBD, call for an integrated approach to conservation that incorporates local environmental knowledge and practices. In a bid to market itself as globally competitive, South Africa’s Curriculum 2005 (C 2005) is primarily focused on Western-based scientific knowledge, which sidelines the contribution of indigenous knowledge systems (IKS) and ignores the holistic nature of indigenous worldviews. The Inkcubeko Nendalo programme is designed to revitalise cultural identity, showing children the value of local indigenous knowledge and cultural environmental values.
- Full Text:
- Date Issued: 2013
- Authors: Cocks, Michelle L , Alexander, Jamie K , Dold, Anthony P
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/141187 , vital:37951 , DOI: 10.1177/0973408212475232
- Description: South Africa is currently the world’s third most biodiverse country, with one of the highest concentrations of threatened biodiversity in the world. Emerging research reveals the increasing pressure on this biodiversity with many wild resources continuing to be utilised for livelihood purposes even within urban environments. The Rio conventions, particularly the CBD, call for an integrated approach to conservation that incorporates local environmental knowledge and practices. In a bid to market itself as globally competitive, South Africa’s Curriculum 2005 (C 2005) is primarily focused on Western-based scientific knowledge, which sidelines the contribution of indigenous knowledge systems (IKS) and ignores the holistic nature of indigenous worldviews. The Inkcubeko Nendalo programme is designed to revitalise cultural identity, showing children the value of local indigenous knowledge and cultural environmental values.
- Full Text:
- Date Issued: 2013
Insights from experimental economics on local cooperation in a small-scale fishery management system:
- Aswani, Shankar, Gurney, Georgina G, Mulville, Sara, Matera, Jaime, Gurven, Michael
- Authors: Aswani, Shankar , Gurney, Georgina G , Mulville, Sara , Matera, Jaime , Gurven, Michael
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/145437 , vital:38438 , DOI: 10.1016/j.gloenvcha.2013.08.003
- Description: Cooperation is central to collective management of small-scale fisheries management, including marine protected areas. Thus an understanding of the factors influencing stakeholders’ propensity to cooperate to achieve shared benefits is essential to accomplishing successful collective fisheries management. In this paper we study stakeholders’ cooperative behavioral disposition and elucidate the role of various socio-economic factors in influencing it in the Roviana Lagoon, Western Solomon Islands. We employed a Public Goods Game from experimental economics tailored to mimic the problem of common pool fisheries management to elucidate peoples’ cooperative behavior. Using Ostrom's framework for analyzing social-ecological systems to guide our analysis, we examined how individual-scale variables (e.g., age, education, family size, ethnicity, occupational status, personal norms), in the context of village-scale variables (e.g., village, governance institutions, group coercive action), influence cooperative behavior, as indexed by game contribution. Ostrom's framework provides an effective window for conceptually peeling back the various socio-economic and governance layers which influence cooperation within these communities.
- Full Text:
- Date Issued: 2013
- Authors: Aswani, Shankar , Gurney, Georgina G , Mulville, Sara , Matera, Jaime , Gurven, Michael
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/145437 , vital:38438 , DOI: 10.1016/j.gloenvcha.2013.08.003
- Description: Cooperation is central to collective management of small-scale fisheries management, including marine protected areas. Thus an understanding of the factors influencing stakeholders’ propensity to cooperate to achieve shared benefits is essential to accomplishing successful collective fisheries management. In this paper we study stakeholders’ cooperative behavioral disposition and elucidate the role of various socio-economic factors in influencing it in the Roviana Lagoon, Western Solomon Islands. We employed a Public Goods Game from experimental economics tailored to mimic the problem of common pool fisheries management to elucidate peoples’ cooperative behavior. Using Ostrom's framework for analyzing social-ecological systems to guide our analysis, we examined how individual-scale variables (e.g., age, education, family size, ethnicity, occupational status, personal norms), in the context of village-scale variables (e.g., village, governance institutions, group coercive action), influence cooperative behavior, as indexed by game contribution. Ostrom's framework provides an effective window for conceptually peeling back the various socio-economic and governance layers which influence cooperation within these communities.
- Full Text:
- Date Issued: 2013
Institutions and economic research: a case of location externalities on agricultural resource allocation in the Kat River basin, South Africa. A Rejoinder
- Mbatha, Cyril N, Antrobus, Geoffrey G
- Authors: Mbatha, Cyril N , Antrobus, Geoffrey G
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/143002 , vital:38184 , https://0-doi.org.wam.seals.ac.za/10.1080/03031853.2013.798069
- Description: In Mbatha and Antrobus (2008), an argument was put forward against an importation or adoption of universal models or general theorems to explain locally prevailing socio-economic conditions and predict outcomes in varied geographical contexts such as in the Kat River basin. In response to this argument a comment in this edition argues that our “results are caused by, metaphorically speaking, comparing apples and oranges. If, however, all of the relevant information is taken into account, a simple economic model may suffice to depict the situation within the KRV.” Here we illustrate that the comment comes from a misreading of basic details in the original discussion and in its construction and presentation of an alternative model of the KRV conditions the comment reiterates our original argument that general models and theorems are likely to fail to explain local intricacies primarily because they are not founded on local historical institutions.
- Full Text:
- Date Issued: 2013
- Authors: Mbatha, Cyril N , Antrobus, Geoffrey G
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/143002 , vital:38184 , https://0-doi.org.wam.seals.ac.za/10.1080/03031853.2013.798069
- Description: In Mbatha and Antrobus (2008), an argument was put forward against an importation or adoption of universal models or general theorems to explain locally prevailing socio-economic conditions and predict outcomes in varied geographical contexts such as in the Kat River basin. In response to this argument a comment in this edition argues that our “results are caused by, metaphorically speaking, comparing apples and oranges. If, however, all of the relevant information is taken into account, a simple economic model may suffice to depict the situation within the KRV.” Here we illustrate that the comment comes from a misreading of basic details in the original discussion and in its construction and presentation of an alternative model of the KRV conditions the comment reiterates our original argument that general models and theorems are likely to fail to explain local intricacies primarily because they are not founded on local historical institutions.
- Full Text:
- Date Issued: 2013
Is classical biological control a 20th century" old science" paradigm that is losing its way?
- Sheppard, Andy, Werner, K, Hill, Martin P, McEvoy, Peter, Fowler, Simon, Hill, Richard
- Authors: Sheppard, Andy , Werner, K , Hill, Martin P , McEvoy, Peter , Fowler, Simon , Hill, Richard
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/425434 , vital:72239 , xlink:href="https://www.fs.usda.gov/research/treesearch/44754"
- Description: For years most countries accepted the benefits of biological control as given, leading to facilitated inside lanes through the regulatory maze. "Successes" led to many passionate disciples over science rationalists. Biocontrol targets continue to be selected on assumptions of good value with little direct evidence. Even when successful, biocontrol has rarely delivered environmental benefits that have been measured. Money flow is still healthy, but is arguably being directed against less impactful targets. Lack of science rigour exposes the field to attacks from an increasing number of critics as values change. A global change driven counter-revolution is underway on the dichotomy of hate between natives and aliens. Will climate change undermine even currently successful biocontrol outcomes? Meanwhile negative direct and indirect impacts of biological continue to fuel dissent. Nowhere is this issue hotter than in Hawaii where "invaders" have massively increased biodiversity, make up nearly all the biomass and create whole new ecosystems. This workshop will entertain a panel discussion around the future for classical biological control of weeds. Does it need to change its paradigm in response to changing societal values, if so can it reinvent itself?
- Full Text:
- Date Issued: 2013
- Authors: Sheppard, Andy , Werner, K , Hill, Martin P , McEvoy, Peter , Fowler, Simon , Hill, Richard
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/425434 , vital:72239 , xlink:href="https://www.fs.usda.gov/research/treesearch/44754"
- Description: For years most countries accepted the benefits of biological control as given, leading to facilitated inside lanes through the regulatory maze. "Successes" led to many passionate disciples over science rationalists. Biocontrol targets continue to be selected on assumptions of good value with little direct evidence. Even when successful, biocontrol has rarely delivered environmental benefits that have been measured. Money flow is still healthy, but is arguably being directed against less impactful targets. Lack of science rigour exposes the field to attacks from an increasing number of critics as values change. A global change driven counter-revolution is underway on the dichotomy of hate between natives and aliens. Will climate change undermine even currently successful biocontrol outcomes? Meanwhile negative direct and indirect impacts of biological continue to fuel dissent. Nowhere is this issue hotter than in Hawaii where "invaders" have massively increased biodiversity, make up nearly all the biomass and create whole new ecosystems. This workshop will entertain a panel discussion around the future for classical biological control of weeds. Does it need to change its paradigm in response to changing societal values, if so can it reinvent itself?
- Full Text:
- Date Issued: 2013
Is Fairtrade in commercial farms justifiable?: its impact on commercial and small-scale producers in South Africa
- Jari, Bridget, Snowball, Jeanette D, Fraser, Gavin C G
- Authors: Jari, Bridget , Snowball, Jeanette D , Fraser, Gavin C G
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/69408 , vital:29519 , https://doi.org/10.1080/03031853.2013.847036
- Description: Fairtrade initially was limited to improving the lives of small-scale and peasant farmers, but later on it embraced commercial farmers, which attracted criticism. While there are a number of justifications for the Fairtrade organization's decision, there are authors who feel that meaningful “fair trade” cannot be achieved with the inclusion of commercial farms. This paper investigates the impact of Fairtrade on commercial farms and small-scale farmer cooperatives in South Africa. Fairtrade on South African commercial farms embraces a number of policy concerns related to land reform, BEE and sustainable development. The results of the study show that when commercial farms are included in the Fairtrade model, communities in which these farmers live benefit from developmental projects. In addition, in some instances, farm workers gain shares in the commercial farms, and benefit from the farm owners’ knowledge and capital.
- Full Text:
- Date Issued: 2013
- Authors: Jari, Bridget , Snowball, Jeanette D , Fraser, Gavin C G
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/69408 , vital:29519 , https://doi.org/10.1080/03031853.2013.847036
- Description: Fairtrade initially was limited to improving the lives of small-scale and peasant farmers, but later on it embraced commercial farmers, which attracted criticism. While there are a number of justifications for the Fairtrade organization's decision, there are authors who feel that meaningful “fair trade” cannot be achieved with the inclusion of commercial farms. This paper investigates the impact of Fairtrade on commercial farms and small-scale farmer cooperatives in South Africa. Fairtrade on South African commercial farms embraces a number of policy concerns related to land reform, BEE and sustainable development. The results of the study show that when commercial farms are included in the Fairtrade model, communities in which these farmers live benefit from developmental projects. In addition, in some instances, farm workers gain shares in the commercial farms, and benefit from the farm owners’ knowledge and capital.
- Full Text:
- Date Issued: 2013
IsiXhosa lexicography: past, present and future
- Authors: Nkomo, Dion , Wababa, Zola
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/67526 , vital:29108 , http://dx.doi.org/10.5788/23-1-1219
- Description: Publisher version , This article presents a panoramic and critical overview of isiXhosa lexicography and its impact on the intellectualisation of this indigenous South African language. The history of isi¬Xhosa lexicography dates back more than two centuries. However, there still exists a need for dic¬tionaries that serve the language-speaking community as practical tools for addressing diverse communication and learning-oriented needs in the current language policy dispensation. The Isi¬Xhosa National Lexicography Unit (XNLU) is currently working on dictionary projects that attempt to address this situation while at the same time not losing sight of the mandate that the Pan South African National Language Board (PanSALB) placed on all the National Lexicography Units (NLUs). For this to happen, the article argues that the NLU needs to put lexicographic prac¬tice into its historical perspective, i.e. conceiving dictionary projects in the light of existing diction¬aries and lexicographic traditions in the language. Over and above that, there is a need to take into account the recent developments in lexicographic research, adopt co-operative lexicographic prac¬tice and develop a dictionary culture among the isiXhosa-speaking community.
- Full Text:
- Date Issued: 2013
- Authors: Nkomo, Dion , Wababa, Zola
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/67526 , vital:29108 , http://dx.doi.org/10.5788/23-1-1219
- Description: Publisher version , This article presents a panoramic and critical overview of isiXhosa lexicography and its impact on the intellectualisation of this indigenous South African language. The history of isi¬Xhosa lexicography dates back more than two centuries. However, there still exists a need for dic¬tionaries that serve the language-speaking community as practical tools for addressing diverse communication and learning-oriented needs in the current language policy dispensation. The Isi¬Xhosa National Lexicography Unit (XNLU) is currently working on dictionary projects that attempt to address this situation while at the same time not losing sight of the mandate that the Pan South African National Language Board (PanSALB) placed on all the National Lexicography Units (NLUs). For this to happen, the article argues that the NLU needs to put lexicographic prac¬tice into its historical perspective, i.e. conceiving dictionary projects in the light of existing diction¬aries and lexicographic traditions in the language. Over and above that, there is a need to take into account the recent developments in lexicographic research, adopt co-operative lexicographic prac¬tice and develop a dictionary culture among the isiXhosa-speaking community.
- Full Text:
- Date Issued: 2013
Karoo volcanic and intrusive rocks: Lesotho and Eastern Cape
- Authors: Marsh, Julian S
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/144890 , vital:38388
- Description: The Karoo Igneous Province is one of the classic Mesozoic continental flood basalt provinces. At present erosion levels it comprises numerous eroded remnants of an extensive, thick volcanic sequence (largely lava flows) and a well-exposed subvolcanic intrusive complex of dykes and sheets which are particularly abundant in the underlying Karoo sedimentary strata.
- Full Text:
- Date Issued: 2013
- Authors: Marsh, Julian S
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/144890 , vital:38388
- Description: The Karoo Igneous Province is one of the classic Mesozoic continental flood basalt provinces. At present erosion levels it comprises numerous eroded remnants of an extensive, thick volcanic sequence (largely lava flows) and a well-exposed subvolcanic intrusive complex of dykes and sheets which are particularly abundant in the underlying Karoo sedimentary strata.
- Full Text:
- Date Issued: 2013
Knockdown of Hop downregulates RhoC expression, and decreases pseudopodia formation and migration in cancer cell lines:
- Willmer, Tarryn, Contu, Lara, Blatch, Gregory L, Edkins, Adrienne L
- Authors: Willmer, Tarryn , Contu, Lara , Blatch, Gregory L , Edkins, Adrienne L
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/165196 , vital:41217 , DOI: 10.1016/j.canlet.2012.09.021
- Description: The Hsp90/Hsp70 organising protein (Hop) is a co-chaperone that mediates the interaction of Hsp90 and Hsp70 molecular chaperones during assembly of Hsp90 complexes in cells. Formation of Hsp90 complexes is a key intermediate step in the maturation and homeostasis of oncoproteins and several hormone receptors. In this paper, we demonstrate that knockdown of Hop decreased migration of Hs578T and MDA-MB-231 breast cancer cells. Hop was identified in isolated pseudopodia fractions; it colocalised with actin in lamellipodia, and co-sedimented with purified actin in vitro. Knockdown of Hop caused a decrease in the level of RhoC GTPase, and significantly inhibited pseudopodia formation in Hs578T cells. Our data suggest that Hop regulates directional cell migration by multiple unknown mechanisms.
- Full Text:
- Date Issued: 2013
- Authors: Willmer, Tarryn , Contu, Lara , Blatch, Gregory L , Edkins, Adrienne L
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/165196 , vital:41217 , DOI: 10.1016/j.canlet.2012.09.021
- Description: The Hsp90/Hsp70 organising protein (Hop) is a co-chaperone that mediates the interaction of Hsp90 and Hsp70 molecular chaperones during assembly of Hsp90 complexes in cells. Formation of Hsp90 complexes is a key intermediate step in the maturation and homeostasis of oncoproteins and several hormone receptors. In this paper, we demonstrate that knockdown of Hop decreased migration of Hs578T and MDA-MB-231 breast cancer cells. Hop was identified in isolated pseudopodia fractions; it colocalised with actin in lamellipodia, and co-sedimented with purified actin in vitro. Knockdown of Hop caused a decrease in the level of RhoC GTPase, and significantly inhibited pseudopodia formation in Hs578T cells. Our data suggest that Hop regulates directional cell migration by multiple unknown mechanisms.
- Full Text:
- Date Issued: 2013
Land claims and the pursuit of co-management on four protected areas in South Africa
- Cundill, Georgina, Thondhlana, Gladman, Sisitka, Lawrence, Shackleton, Sheona, Blorea, M
- Authors: Cundill, Georgina , Thondhlana, Gladman , Sisitka, Lawrence , Shackleton, Sheona , Blorea, M
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/391223 , vital:68632 , xlink:href="https://doi.org/10.1016/j.landusepol.2013.05.016"
- Description: Successful land claims on protected areas by previously disenfranchised communities often result in co-management agreements between claimant communities and state conservation agencies. South Africa, in particular, has pursued co-management as the desired outcome of land claims on its protected areas. We review four cases of co-management on protected areas in South Africa, and reflect on the appropriateness of the pursuit of co-management as the preferred outcome of land claims. Despite promises of pro-poor, democratically informed management, the practical experience of co-management has seen the continuation of the status quo in terms of conservation, with very few material benefits for claimant communities and limited sharing of responsibilities and decision-making functions. The findings underscore two deep challenges facing co-management in cases of land claims worldwide. First, during land claims negotiations in cases involving protected areas, the state cannot be expected to represent the best interests of its citizens (the land claimants), while simultaneously seeking to meet national and international obligations for protected area coverage. Second, the concept of democratic co-management may sit uncomfortably beside the realities of managing loss-making protected areas with ever-shrinking conservation budgets. Where co-management agreements have already been signed, ensuring that new landowners do indeed have a say in management should form the driving focus for co-management practice going forward.
- Full Text:
- Date Issued: 2013
- Authors: Cundill, Georgina , Thondhlana, Gladman , Sisitka, Lawrence , Shackleton, Sheona , Blorea, M
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/391223 , vital:68632 , xlink:href="https://doi.org/10.1016/j.landusepol.2013.05.016"
- Description: Successful land claims on protected areas by previously disenfranchised communities often result in co-management agreements between claimant communities and state conservation agencies. South Africa, in particular, has pursued co-management as the desired outcome of land claims on its protected areas. We review four cases of co-management on protected areas in South Africa, and reflect on the appropriateness of the pursuit of co-management as the preferred outcome of land claims. Despite promises of pro-poor, democratically informed management, the practical experience of co-management has seen the continuation of the status quo in terms of conservation, with very few material benefits for claimant communities and limited sharing of responsibilities and decision-making functions. The findings underscore two deep challenges facing co-management in cases of land claims worldwide. First, during land claims negotiations in cases involving protected areas, the state cannot be expected to represent the best interests of its citizens (the land claimants), while simultaneously seeking to meet national and international obligations for protected area coverage. Second, the concept of democratic co-management may sit uncomfortably beside the realities of managing loss-making protected areas with ever-shrinking conservation budgets. Where co-management agreements have already been signed, ensuring that new landowners do indeed have a say in management should form the driving focus for co-management practice going forward.
- Full Text:
- Date Issued: 2013
Lechwe Trust Collection:
- Authors: Simbao, Ruth K
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/147547 , vital:38648 , https://doi.org/10.1162/afar.2005.38.3.78
- Description: The caustic humor of The Arts Delegate (2000), by the cartoonist popularly known in Zambia as" Yuss," captures a dynamic readily found in the Zambian art world.
- Full Text:
- Date Issued: 2013
- Authors: Simbao, Ruth K
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/147547 , vital:38648 , https://doi.org/10.1162/afar.2005.38.3.78
- Description: The caustic humor of The Arts Delegate (2000), by the cartoonist popularly known in Zambia as" Yuss," captures a dynamic readily found in the Zambian art world.
- Full Text:
- Date Issued: 2013
Local setting influences the quantity of household food waste in mid-sized South African towns
- Chakona, Gamuchirai, Shackleton, Charlie M
- Authors: Chakona, Gamuchirai , Shackleton, Charlie M
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/67289 , vital:29067 , https://doi.org/10.1371/journal.pone.0189407
- Description: publisher version , From Introduction: The world faces a food security challenge with approximately 868 million people undernourished and about two billion people suffering from the negative health consequences of micronutrient deficiencies [1]. Yet, at least one-third of food produced for human consumption is lost or wasted along the food chain between farm and fork [2–7]. Food waste refers to wholesome edible material intended for human consumption, arising at any point in the food supply chain that is instead discarded, lost, degraded or consumed by pests [8]. Food loss is defined as the decrease in food quantity or quality which makes it unfit for human consumption [9]. According to the European Commission [10], food waste is composed of raw or cooked food materials such as vegetable peelings, meat trimmings and spoiled or excess ingredients or prepared food as well as bones, carcasses and organs. However, food waste can be measured only for edible products that are directed to human consumption [6]. Food losses take place at production, postharvest and processing stages in the food supply chain and the food losses that occur at the end of the food chain (retail and final consumption) are called “food waste” [11]. In our study food waste refers to food losses that occur at the end of the food chain (final consumption at household or consumer level) which include edible products that are directed to human consumption and are discarded when not consumed for various reasons. It is related to consumers’ behaviour [6,11] and it includes food loss before, during or after meal preparation in the household. , The research was funded by VW foundation under the Livelihoods Urbanisation and Natural Resources in Africa (LUNA) project through Freiburg University, Germany. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of this manuscript
- Full Text:
- Date Issued: 2013
- Authors: Chakona, Gamuchirai , Shackleton, Charlie M
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/67289 , vital:29067 , https://doi.org/10.1371/journal.pone.0189407
- Description: publisher version , From Introduction: The world faces a food security challenge with approximately 868 million people undernourished and about two billion people suffering from the negative health consequences of micronutrient deficiencies [1]. Yet, at least one-third of food produced for human consumption is lost or wasted along the food chain between farm and fork [2–7]. Food waste refers to wholesome edible material intended for human consumption, arising at any point in the food supply chain that is instead discarded, lost, degraded or consumed by pests [8]. Food loss is defined as the decrease in food quantity or quality which makes it unfit for human consumption [9]. According to the European Commission [10], food waste is composed of raw or cooked food materials such as vegetable peelings, meat trimmings and spoiled or excess ingredients or prepared food as well as bones, carcasses and organs. However, food waste can be measured only for edible products that are directed to human consumption [6]. Food losses take place at production, postharvest and processing stages in the food supply chain and the food losses that occur at the end of the food chain (retail and final consumption) are called “food waste” [11]. In our study food waste refers to food losses that occur at the end of the food chain (final consumption at household or consumer level) which include edible products that are directed to human consumption and are discarded when not consumed for various reasons. It is related to consumers’ behaviour [6,11] and it includes food loss before, during or after meal preparation in the household. , The research was funded by VW foundation under the Livelihoods Urbanisation and Natural Resources in Africa (LUNA) project through Freiburg University, Germany. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of this manuscript
- Full Text:
- Date Issued: 2013
Making meaning of citizenship: how ‘born frees’ use media in South Africa's democratic evolution
- Malila, Vanessa, Oeofsen, Marietjie, Garman, Anthea
- Authors: Malila, Vanessa , Oeofsen, Marietjie , Garman, Anthea
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/159790 , vital:40344 , DOI: 10.1080/02500167.2013.852598
- Description: By examining young people's habits of using the media in relation to citizenship, this article responds to calls that the starting point for research into citizenship and democracy should be the perspectives of citizens themselves. Drawing on both quantitative and qualitative research with young South Africans (the ‘born free’ generation), the study sought to gain insight into how young people use media to make sense of notions of citizenship and participatory democracy in ways that are relevant and reliable to their everyday lives.
- Full Text:
- Date Issued: 2013
- Authors: Malila, Vanessa , Oeofsen, Marietjie , Garman, Anthea
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/159790 , vital:40344 , DOI: 10.1080/02500167.2013.852598
- Description: By examining young people's habits of using the media in relation to citizenship, this article responds to calls that the starting point for research into citizenship and democracy should be the perspectives of citizens themselves. Drawing on both quantitative and qualitative research with young South Africans (the ‘born free’ generation), the study sought to gain insight into how young people use media to make sense of notions of citizenship and participatory democracy in ways that are relevant and reliable to their everyday lives.
- Full Text:
- Date Issued: 2013
Marxisms past and present
- Helliker, Kirk D, Vale, Peter C J
- Authors: Helliker, Kirk D , Vale, Peter C J
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/71263 , vital:29825 , https://doi.org/10.1177/0725513612470532
- Description: Marxism was central to the understanding of South Africa’s struggle for freedom. This article provides a critical analysis of Marxist literature on South Africa since the 1970s, drawing out its relevance for contemporary analyses of the post-apartheid state and for radical politics today. It suggests that while the literature offered important insights into the character of the apartheid state, it failed to provide a critical appraisal of the state per se. Moreover, the capturing of state power by the liberation movement was not grounded in an understanding of the oppressive character of the state-form. The undermining of mainstream Marxism under neo-liberalizing conditions in post-apartheid South Africa has opened up the prospects for anti-statist radical libertarian thinking (including autonomist Marxism), and this thinking is consistent with the practices of certain autonomist popular politics currently emerging. Social theorizing on South Africa has had a complex relationship with Marxism. This article is interested in drawing on this experience in an effort to understand its implications for the ‘new’ South Africa where, 20 years after apartheid’s formal ending, social transformation remains caught in the logic not of Marxism but neo-liberalizing capitalism.
- Full Text: false
- Date Issued: 2013
- Authors: Helliker, Kirk D , Vale, Peter C J
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/71263 , vital:29825 , https://doi.org/10.1177/0725513612470532
- Description: Marxism was central to the understanding of South Africa’s struggle for freedom. This article provides a critical analysis of Marxist literature on South Africa since the 1970s, drawing out its relevance for contemporary analyses of the post-apartheid state and for radical politics today. It suggests that while the literature offered important insights into the character of the apartheid state, it failed to provide a critical appraisal of the state per se. Moreover, the capturing of state power by the liberation movement was not grounded in an understanding of the oppressive character of the state-form. The undermining of mainstream Marxism under neo-liberalizing conditions in post-apartheid South Africa has opened up the prospects for anti-statist radical libertarian thinking (including autonomist Marxism), and this thinking is consistent with the practices of certain autonomist popular politics currently emerging. Social theorizing on South Africa has had a complex relationship with Marxism. This article is interested in drawing on this experience in an effort to understand its implications for the ‘new’ South Africa where, 20 years after apartheid’s formal ending, social transformation remains caught in the logic not of Marxism but neo-liberalizing capitalism.
- Full Text: false
- Date Issued: 2013