'God is my forest': Xhosa cultural values provide untapped opportunities for conservation
- Cocks, Michelle L, Dold, Anthony P, Vetter, Susan M
- Authors: Cocks, Michelle L , Dold, Anthony P , Vetter, Susan M
- Date: 2012
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/141198 , vital:37952 , DOI: 10.4102/sajs.v108i5/6.880
- Description: In South Africa conservation is still largely framed in terms of Western scientific values, with a focus on material benefits to local communities, whilst little is known about the intangible values local people attach to nature and biodiversity. We explored the cultural, spiritual and emotional relationships with nature expressed by Xhosa people, within the MaputalandPondoland-Albany Hotspot, as well as the activities that mediate this relationship. A descriptive research approach was applied to document the emotions, meanings and values associated with landscape elements. This approach included group and individual interviews and ‘walk-in-the-woods’ interviews and participatory mapping exercises. Respondents portrayed a strong, although not always easily articulated, appreciation for nature, especially ihlathi lesiXhosa (‘Xhosa forest’, vegetation types within the Thicket Biome).
- Full Text:
- Date Issued: 2012
- Authors: Cocks, Michelle L , Dold, Anthony P , Vetter, Susan M
- Date: 2012
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/141198 , vital:37952 , DOI: 10.4102/sajs.v108i5/6.880
- Description: In South Africa conservation is still largely framed in terms of Western scientific values, with a focus on material benefits to local communities, whilst little is known about the intangible values local people attach to nature and biodiversity. We explored the cultural, spiritual and emotional relationships with nature expressed by Xhosa people, within the MaputalandPondoland-Albany Hotspot, as well as the activities that mediate this relationship. A descriptive research approach was applied to document the emotions, meanings and values associated with landscape elements. This approach included group and individual interviews and ‘walk-in-the-woods’ interviews and participatory mapping exercises. Respondents portrayed a strong, although not always easily articulated, appreciation for nature, especially ihlathi lesiXhosa (‘Xhosa forest’, vegetation types within the Thicket Biome).
- Full Text:
- Date Issued: 2012
A description of gametogenesis in the panga Pterogymnus laniarius (Pisces: Sparidae) with comments on changes in maturity patterns over the past two decades
- Booth, Anthony J, Hecht, Thomas
- Authors: Booth, Anthony J , Hecht, Thomas
- Date: 2015
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/123542 , vital:35452 , https://doi.org/10.1080/02541858.1997.11448428
- Description: A description of gametogenesis in the panga Pferogymnus laniarius, a common endemic seabream species inhabiting the Agulhas Bank, South Africa, is presented. After sexual maturity, oogenesis and spermatogenesis continued throughout the year and were found to be similar to these processes in other seabream species and teleosts in general. Analysis of maturity data over the past two decades revealed a significant change in both age and size-at-maturity, a response to fishing pressure.
- Full Text:
- Date Issued: 2015
- Authors: Booth, Anthony J , Hecht, Thomas
- Date: 2015
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/123542 , vital:35452 , https://doi.org/10.1080/02541858.1997.11448428
- Description: A description of gametogenesis in the panga Pferogymnus laniarius, a common endemic seabream species inhabiting the Agulhas Bank, South Africa, is presented. After sexual maturity, oogenesis and spermatogenesis continued throughout the year and were found to be similar to these processes in other seabream species and teleosts in general. Analysis of maturity data over the past two decades revealed a significant change in both age and size-at-maturity, a response to fishing pressure.
- Full Text:
- Date Issued: 2015
A model for the analysis of small group interaction–and beyond?:
- Authors: Hunt, Sally
- Date: 2012
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/139171 , vital:37711 , DOI: 10.1080/10118063.1997.9724122
- Description: This article describes a branching model developed for the analysis of interaction in small teaching groups in a tertiary setting. Based within Conversation Analysis, the model constitutes a set of justifications for the validity of utterances in terms of their place on the conversational floor. Examples of the classifications included in the model are provided from a broader study of interaction in tutorials at an Eastern Cape university. It is suggested that while the model was developed for a specific context, it could be adapted for use in a variety of contexts.
- Full Text:
- Date Issued: 2012
- Authors: Hunt, Sally
- Date: 2012
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/139171 , vital:37711 , DOI: 10.1080/10118063.1997.9724122
- Description: This article describes a branching model developed for the analysis of interaction in small teaching groups in a tertiary setting. Based within Conversation Analysis, the model constitutes a set of justifications for the validity of utterances in terms of their place on the conversational floor. Examples of the classifications included in the model are provided from a broader study of interaction in tutorials at an Eastern Cape university. It is suggested that while the model was developed for a specific context, it could be adapted for use in a variety of contexts.
- Full Text:
- Date Issued: 2012
A new species of the triggerfish genus Xenobalistes matsuura (Tetradontiformes: Balistidae) from South Africa
- Heemstra, Phillip C, Smith, Margaret Mary, J.L.B. Smith Institute of Ichthyology
- Authors: Heemstra, Phillip C , Smith, Margaret Mary , J.L.B. Smith Institute of Ichthyology
- Date: 1983-01
- Subjects: Fishes -- South Africa , Fishes -- Classification , Balistidae -- South Africa
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/69968 , vital:29603 , Margaret Smith Library (South African Institute for Aquatic Biodiversity (SAIAB)) Periodicals Margaret Smith Library (South African Institute for Aquatic Biodiversity (SAIAB))
- Description: Online version of original print edition of the Special Publication of the J.L.B. Smith Institute of Ichthyology; No. 26 , Xenobalistes punctatus, the second species of the peculiar balistid genus Xenobalistes, is described from one specimen found on the beach at the mouth of the Van Stadens River, eastern Cape Province, South Africa. X. punctatus differs significantly from X. tumidipectoris Matsuura, 1981 in the number of body scale rows and spination of the anterolateral surface of the first dorsal-fin spine. The head and body of X. punctatus are dark brown, covered with numerous, small, evenly-spaced, silvery/white spots.
- Full Text:
- Date Issued: 1983-01
- Authors: Heemstra, Phillip C , Smith, Margaret Mary , J.L.B. Smith Institute of Ichthyology
- Date: 1983-01
- Subjects: Fishes -- South Africa , Fishes -- Classification , Balistidae -- South Africa
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/69968 , vital:29603 , Margaret Smith Library (South African Institute for Aquatic Biodiversity (SAIAB)) Periodicals Margaret Smith Library (South African Institute for Aquatic Biodiversity (SAIAB))
- Description: Online version of original print edition of the Special Publication of the J.L.B. Smith Institute of Ichthyology; No. 26 , Xenobalistes punctatus, the second species of the peculiar balistid genus Xenobalistes, is described from one specimen found on the beach at the mouth of the Van Stadens River, eastern Cape Province, South Africa. X. punctatus differs significantly from X. tumidipectoris Matsuura, 1981 in the number of body scale rows and spination of the anterolateral surface of the first dorsal-fin spine. The head and body of X. punctatus are dark brown, covered with numerous, small, evenly-spaced, silvery/white spots.
- Full Text:
- Date Issued: 1983-01
A programme for the alliance
- COSATU
- Authors: COSATU
- Date: 1996
- Subjects: COSATU
- Language: English
- Type: text
- Identifier: http://hdl.handle.net/10962/155650 , vital:39902
- Description: From Cosatu’s inception in 1985, the federation developed a close association with the Congress movement. Conditions in the country dictated the need to go beyond bread and butter issues to embrace national and class struggle. This perspective was formally endorsed with Cosatu’s adoption of the Freedom Charter in 1987. The 1987 Congress agreed Cosatu should build alliances with mass-based organisations with a track record of struggle and whose principles did not conflict with those of Cosatu. After the unbanning of the liberation movement, Cosatu’s 1991 Congress resolved that the Federation should join the ANC and SACP in alliance in place of Sactu, thus becoming part of the Tripartite Alliance as we know it today.
- Full Text:
- Date Issued: 1996
- Authors: COSATU
- Date: 1996
- Subjects: COSATU
- Language: English
- Type: text
- Identifier: http://hdl.handle.net/10962/155650 , vital:39902
- Description: From Cosatu’s inception in 1985, the federation developed a close association with the Congress movement. Conditions in the country dictated the need to go beyond bread and butter issues to embrace national and class struggle. This perspective was formally endorsed with Cosatu’s adoption of the Freedom Charter in 1987. The 1987 Congress agreed Cosatu should build alliances with mass-based organisations with a track record of struggle and whose principles did not conflict with those of Cosatu. After the unbanning of the liberation movement, Cosatu’s 1991 Congress resolved that the Federation should join the ANC and SACP in alliance in place of Sactu, thus becoming part of the Tripartite Alliance as we know it today.
- Full Text:
- Date Issued: 1996
A response to the South African Jewish report and Ms Klazinga on "Jews unwelcome at Rhodes"
- Authors: Badat, Saleem
- Date: 2014
- Language: English
- Type: text
- Identifier: vital:7883 , http://hdl.handle.net/10962/d1016432
- Description: On 1 January 2014, the South African Jewish Report and Ms Larissa Klazinga made a number of unfounded claims and unsubstantiated allegations against Rhodes University. Stripped of the hysteria, lies and inaccuracies, the central claim made is that Rhodes University is hostile to Jews and seeks to be rid of Jews. We reject with contempt these baseless and self-serving claims and allegations of the South African Jewish Report and Klazinga. Rhodes is committed to an institutional culture that respects and promotes equity, human dignity and human rights, embraces difference and diversity and is comfortable for all people irrespective of ‘race’, gender, language, culture, nationality, sexual orientation and religion. Rhodes welcomes all and will continue to strive to be a Home for All.
- Full Text:
- Date Issued: 2014
- Authors: Badat, Saleem
- Date: 2014
- Language: English
- Type: text
- Identifier: vital:7883 , http://hdl.handle.net/10962/d1016432
- Description: On 1 January 2014, the South African Jewish Report and Ms Larissa Klazinga made a number of unfounded claims and unsubstantiated allegations against Rhodes University. Stripped of the hysteria, lies and inaccuracies, the central claim made is that Rhodes University is hostile to Jews and seeks to be rid of Jews. We reject with contempt these baseless and self-serving claims and allegations of the South African Jewish Report and Klazinga. Rhodes is committed to an institutional culture that respects and promotes equity, human dignity and human rights, embraces difference and diversity and is comfortable for all people irrespective of ‘race’, gender, language, culture, nationality, sexual orientation and religion. Rhodes welcomes all and will continue to strive to be a Home for All.
- Full Text:
- Date Issued: 2014
A Review of Arterial Stiffness and HIV Infection in Adult Africans
- Awotedu, Kofoworola Olajire, Iputo, Jehu
- Authors: Awotedu, Kofoworola Olajire , Iputo, Jehu
- Date: 09-06-2016
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/11260/3484 , vital:43615 , https://www.hilarispublisher.com/open-access/a-review-of-arterial-stiffness-and-hiv-infection-in-adult-africans-2167-1095-1000221.pdf
- Description: Aim: To review the impact of the human immunodeficiency virus and antiretroviral therapy on the vasculature. Objectives: This review seeks to identify the burden which the human immunodeficiency virus and antiretroviral therapy have on the vasculature. Method: Medline/PubMed and Google scholar were searched. There were over 100 publications reviewed. Some people who worked in similar fields were also contacted. The present review summarized current understanding of Human immunodeficiency virus, antiretroviral therapy and effect on the vasculature such as arterial stiffness. Atherosclerosis, endothelial dysfunction, the strengths and weaknesses of current testing strategies, and their potential applications in clinical research and patient care. The association of inflammatory biomarkers, blood pressure and ageing with arterial stiffness were also reviewed. Conclusion: Available literature shows that HIV and antiretroviral agents have a great impact on the vasculature and its progression.
- Full Text:
- Date Issued: 09-06-2016
- Authors: Awotedu, Kofoworola Olajire , Iputo, Jehu
- Date: 09-06-2016
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/11260/3484 , vital:43615 , https://www.hilarispublisher.com/open-access/a-review-of-arterial-stiffness-and-hiv-infection-in-adult-africans-2167-1095-1000221.pdf
- Description: Aim: To review the impact of the human immunodeficiency virus and antiretroviral therapy on the vasculature. Objectives: This review seeks to identify the burden which the human immunodeficiency virus and antiretroviral therapy have on the vasculature. Method: Medline/PubMed and Google scholar were searched. There were over 100 publications reviewed. Some people who worked in similar fields were also contacted. The present review summarized current understanding of Human immunodeficiency virus, antiretroviral therapy and effect on the vasculature such as arterial stiffness. Atherosclerosis, endothelial dysfunction, the strengths and weaknesses of current testing strategies, and their potential applications in clinical research and patient care. The association of inflammatory biomarkers, blood pressure and ageing with arterial stiffness were also reviewed. Conclusion: Available literature shows that HIV and antiretroviral agents have a great impact on the vasculature and its progression.
- Full Text:
- Date Issued: 09-06-2016
A stability-indicating HPLC assay with on-line clean-up for betamethasone 17-valerate in topical dosage forms
- Smith, Eric W, Haigh, John M, Kanfer, Isadore
- Authors: Smith, Eric W , Haigh, John M , Kanfer, Isadore
- Date: 1985
- Language: English
- Type: Article
- Identifier: vital:6421 , http://hdl.handle.net/10962/d1006556
- Description: A stability-indicating high-performance liquid chromatographic method with on-line clean-up has been developed for the analysis of betamethasone 17-valerate in topical dosage forms. A short pre-column containing 10 μm octadecylsilane mounted into the sample loop position of an injection valve was used as the primary clean-up step. The utilization of a diode-array UV detector allowed the quantitative analysis of betamethasone 17-valerate together with its degradation product, betamethasone 21-valerate, as well as the qualitative analysis of these compounds, relevant internal standards and the preservatives chlorocresol and methyl hydroxybenzoate contained in the cream and lotion formulations, respectively. Typically, cream and lotion dosage forms were dissolved in acetonitrile and ointments in tetrahydrofuran, internal standards added and aliquots injected onto the analytical system. Dosage form excipients were retained on the loop column and back-flushed to waste with the aid of a second solvent pump while components of interest were allowed to transfer to the analytical column for quantitative analysis. The method is accurate, precise and stability indicating and permits the rapid on-line analysis of betamethasone 17-valerate from complex topical formulation matrices without prior extractions.
- Full Text:
- Date Issued: 1985
- Authors: Smith, Eric W , Haigh, John M , Kanfer, Isadore
- Date: 1985
- Language: English
- Type: Article
- Identifier: vital:6421 , http://hdl.handle.net/10962/d1006556
- Description: A stability-indicating high-performance liquid chromatographic method with on-line clean-up has been developed for the analysis of betamethasone 17-valerate in topical dosage forms. A short pre-column containing 10 μm octadecylsilane mounted into the sample loop position of an injection valve was used as the primary clean-up step. The utilization of a diode-array UV detector allowed the quantitative analysis of betamethasone 17-valerate together with its degradation product, betamethasone 21-valerate, as well as the qualitative analysis of these compounds, relevant internal standards and the preservatives chlorocresol and methyl hydroxybenzoate contained in the cream and lotion formulations, respectively. Typically, cream and lotion dosage forms were dissolved in acetonitrile and ointments in tetrahydrofuran, internal standards added and aliquots injected onto the analytical system. Dosage form excipients were retained on the loop column and back-flushed to waste with the aid of a second solvent pump while components of interest were allowed to transfer to the analytical column for quantitative analysis. The method is accurate, precise and stability indicating and permits the rapid on-line analysis of betamethasone 17-valerate from complex topical formulation matrices without prior extractions.
- Full Text:
- Date Issued: 1985
A taxonomic and ecological review of Pseudocloeon glaucum (Agnew)(Ephemeroptera: Baetidae)
- Lugo-Ortiz, C R, De Moor, Ferdy C, Barber-James, Helen M
- Authors: Lugo-Ortiz, C R , De Moor, Ferdy C , Barber-James, Helen M
- Date: 2000
- Language: English
- Type: Article
- Identifier: vital:7007 , http://hdl.handle.net/10962/d1008385
- Description: Pseudocloeon masai (Lugo-Ortiz and McCafferty), P. nadineae (Lugo-Ortiz and McCafferty) and P. quintum (Agnew) are junior subjective synonyms of P. glaucum (Agnew). Larvae of P. glaucum manifest a wide range of variation in mouthpart morphology, particularly with respect to the development of the distomedial process of segment 2 of the labial palps, body size, general body colour and abdominal colour pattern. Such variation is observed in different cohorts and populations, and explains why several names have been applied to the same species. Larvae of P. glaucum also have considerable ecological tolerance, accounting for the abundance and widespread distribution of the species in the Afrotropical Region. New records from Kenya, Lesotho, Namibia and Zimbabwe are provided.
- Full Text:
- Date Issued: 2000
- Authors: Lugo-Ortiz, C R , De Moor, Ferdy C , Barber-James, Helen M
- Date: 2000
- Language: English
- Type: Article
- Identifier: vital:7007 , http://hdl.handle.net/10962/d1008385
- Description: Pseudocloeon masai (Lugo-Ortiz and McCafferty), P. nadineae (Lugo-Ortiz and McCafferty) and P. quintum (Agnew) are junior subjective synonyms of P. glaucum (Agnew). Larvae of P. glaucum manifest a wide range of variation in mouthpart morphology, particularly with respect to the development of the distomedial process of segment 2 of the labial palps, body size, general body colour and abdominal colour pattern. Such variation is observed in different cohorts and populations, and explains why several names have been applied to the same species. Larvae of P. glaucum also have considerable ecological tolerance, accounting for the abundance and widespread distribution of the species in the Afrotropical Region. New records from Kenya, Lesotho, Namibia and Zimbabwe are provided.
- Full Text:
- Date Issued: 2000
A technique for evaluating species richness maps generated from collections data
- Robertson, Mark P, Barker, Nigel P
- Authors: Robertson, Mark P , Barker, Nigel P
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:6538 , http://hdl.handle.net/10962/d1005979
- Description: There is considerable pressure on conservation planners to use existing data from herbarium and museum collections for planning and monitoring, despite the weaknesses of such data. It is thus important to be able to assess the quality of this information. One application of these data is the production of species richness maps. However, sampling effort is generally not consistent throughout a region for maps generated from collections data, and it is thus desirable to identify geographic grid cells (such as quarter degree squares: QDS) for which there has been low sampling effort. We describe a technique that can be used to identify QDS that are likely to have low species richness that is due to insufficient sampling effort rather than to low actual species richness. The technique exploits relationships between climate and species richness to detect QDS that are poorly sampled. This approach offers advantages over the current practice of applying a single threshold across the entire map region to detectQDSthat are poorly sampled. Here we report on the application of our technique to plant species richness data in the PRECIS database. Results reveal that the majority of QDS in the Flora of Southern Africa region can be considered to be poorly sampled, even when using conservative thresholds for richness values. The advantages and weaknesses of the technique are discussed and issues requiring further investigation are highlighted.
- Full Text:
- Date Issued: 2006
- Authors: Robertson, Mark P , Barker, Nigel P
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:6538 , http://hdl.handle.net/10962/d1005979
- Description: There is considerable pressure on conservation planners to use existing data from herbarium and museum collections for planning and monitoring, despite the weaknesses of such data. It is thus important to be able to assess the quality of this information. One application of these data is the production of species richness maps. However, sampling effort is generally not consistent throughout a region for maps generated from collections data, and it is thus desirable to identify geographic grid cells (such as quarter degree squares: QDS) for which there has been low sampling effort. We describe a technique that can be used to identify QDS that are likely to have low species richness that is due to insufficient sampling effort rather than to low actual species richness. The technique exploits relationships between climate and species richness to detect QDS that are poorly sampled. This approach offers advantages over the current practice of applying a single threshold across the entire map region to detectQDSthat are poorly sampled. Here we report on the application of our technique to plant species richness data in the PRECIS database. Results reveal that the majority of QDS in the Flora of Southern Africa region can be considered to be poorly sampled, even when using conservative thresholds for richness values. The advantages and weaknesses of the technique are discussed and issues requiring further investigation are highlighted.
- Full Text:
- Date Issued: 2006
A temporal dimension to the influence of pollen rewards on bee behaviour and fecundity in Aloe tenuior
- Duffy, Karl J, Johnson, Steven D, Peter, Craig I
- Authors: Duffy, Karl J , Johnson, Steven D , Peter, Craig I
- Date: 2014
- Language: English
- Type: Article
- Identifier: vital:6561 , http://hdl.handle.net/10962/d1011735 , http://dx.doi.org/10.1371/journal.pone.0094908
- Description: The net effect of pollen production on fecundity in plants can range from negative – when self-pollen interferes with fecundity due to incompatibility mechanisms, to positive – when pollen availability is associated with increased pollinator visitation and fecundity due to its utilization as a reward. We investigated the responses of bees to pollen and nectar rewards, and the effects of these rewards on pollen deposition and fecundity in the hermaphroditic succulent shrub Aloe tenuior. Self-pollinated plants failed to set fruit, but their ovules were regularly penetrated by self-pollen tubes, which uniformly failed to develop into seeds as expected from ovarian self-incompatibility (or strong early inbreeding depression). Bees consistently foraged for pollen during the morning and early afternoon, but switched to nectar in the late afternoon. As a consequence of this differential foraging, we were able to test the relative contribution to fecundity of pollen- versus nectar-collecting flower visitors. We exposed emasculated and intact flowers in either the morning or late afternoon to foraging bees and showed that emasculation reduced pollen deposition by insects in the morning, but had little effect in the afternoon. Despite the potential for self-pollination to result in ovule discounting due to late-acting self-sterility, fecundity was severely reduced in artificially emasculated plants. Although there were temporal fluctuations in reward preference, most bee visits were for pollen rewards. Therefore the benefit of providing pollen that is accessible to bee foragers outweighs any potential costs to fitness in terms of gender interference in this species.
- Full Text:
- Date Issued: 2014
- Authors: Duffy, Karl J , Johnson, Steven D , Peter, Craig I
- Date: 2014
- Language: English
- Type: Article
- Identifier: vital:6561 , http://hdl.handle.net/10962/d1011735 , http://dx.doi.org/10.1371/journal.pone.0094908
- Description: The net effect of pollen production on fecundity in plants can range from negative – when self-pollen interferes with fecundity due to incompatibility mechanisms, to positive – when pollen availability is associated with increased pollinator visitation and fecundity due to its utilization as a reward. We investigated the responses of bees to pollen and nectar rewards, and the effects of these rewards on pollen deposition and fecundity in the hermaphroditic succulent shrub Aloe tenuior. Self-pollinated plants failed to set fruit, but their ovules were regularly penetrated by self-pollen tubes, which uniformly failed to develop into seeds as expected from ovarian self-incompatibility (or strong early inbreeding depression). Bees consistently foraged for pollen during the morning and early afternoon, but switched to nectar in the late afternoon. As a consequence of this differential foraging, we were able to test the relative contribution to fecundity of pollen- versus nectar-collecting flower visitors. We exposed emasculated and intact flowers in either the morning or late afternoon to foraging bees and showed that emasculation reduced pollen deposition by insects in the morning, but had little effect in the afternoon. Despite the potential for self-pollination to result in ovule discounting due to late-acting self-sterility, fecundity was severely reduced in artificially emasculated plants. Although there were temporal fluctuations in reward preference, most bee visits were for pollen rewards. Therefore the benefit of providing pollen that is accessible to bee foragers outweighs any potential costs to fitness in terms of gender interference in this species.
- Full Text:
- Date Issued: 2014
A tree cannot make a forest: looking inward, reaching out in African Art Studies
- Authors: Fọlárànmí, Stephen
- Date: 2019
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/146090 , vital:38494 , https://0-doi.org.wam.seals.ac.za/10.1162/afar_a_00453
- Description: These proverbs from the Yorùbá of southwestern Nigeria and the Bemba of Zambia are a few examples that can be found in many Africa languages. While these proverbs are rich in philosophical sayings and muses, many are being forgotten because fewer and fewer people possess deep knowledge of languages, and in the arts, Africans tend to look to the Global North for theoretical frameworks to examine their art and other cultural properties. The title of this piece is therefore an identification with the potency of the proverbs because of the trends of collaboration that I have noticed in the last few years in African Art Studies. It could also be said to be a call to look into what could be shared within Global Souths in terms of an available knowledge base that could be used to forge ahead rather than subjecting thoughts and knowledge to the Global North.
- Full Text:
- Date Issued: 2019
- Authors: Fọlárànmí, Stephen
- Date: 2019
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/146090 , vital:38494 , https://0-doi.org.wam.seals.ac.za/10.1162/afar_a_00453
- Description: These proverbs from the Yorùbá of southwestern Nigeria and the Bemba of Zambia are a few examples that can be found in many Africa languages. While these proverbs are rich in philosophical sayings and muses, many are being forgotten because fewer and fewer people possess deep knowledge of languages, and in the arts, Africans tend to look to the Global North for theoretical frameworks to examine their art and other cultural properties. The title of this piece is therefore an identification with the potency of the proverbs because of the trends of collaboration that I have noticed in the last few years in African Art Studies. It could also be said to be a call to look into what could be shared within Global Souths in terms of an available knowledge base that could be used to forge ahead rather than subjecting thoughts and knowledge to the Global North.
- Full Text:
- Date Issued: 2019
Academic development as enhancement: celebrating a decade of the TLC through the annual teaching week
- Jonas, N, Schekle, L, Toni, N
- Authors: Jonas, N , Schekle, L , Toni, N
- Date: 2014
- Language: English
- Type: Newsletter
- Identifier: vital:12226 , http://hdl.handle.net/10353/d1016144
- Description: Teaching and Learning Centre newsletter 2014 first edition
- Full Text: false
- Date Issued: 2014
- Authors: Jonas, N , Schekle, L , Toni, N
- Date: 2014
- Language: English
- Type: Newsletter
- Identifier: vital:12226 , http://hdl.handle.net/10353/d1016144
- Description: Teaching and Learning Centre newsletter 2014 first edition
- Full Text: false
- Date Issued: 2014
Acute toxicity study and prevention of Nω-nitro-L-arginine methyl ester-induced hypertension by Osteopermum imbricatum
- Tata, Charlotte, M, Gwebu, Ephraim, T, Olukayode O Aremu, Nkeh-Chungag, Benedicta, N, Oyedeji, Adebola, O, Oyedeji, Opeopluwa, O, Sewani-Rusike, Constance, R
- Authors: Tata, Charlotte, M , Gwebu, Ephraim, T , Olukayode O Aremu , Nkeh-Chungag, Benedicta, N , Oyedeji, Adebola, O , Oyedeji, Opeopluwa, O , Sewani-Rusike, Constance, R
- Date: June-2018
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/11260/4915 , vital:44303 , https://www.ajol.info/index.php/tjpr/article/view/174343
- Description: Purpose:To determine the phytochemical content, toxicity and hypertension prevention effects of Osteospermum imbricatum leaf and root extracts.Methods:Phytochemical screening of leaf and root extracts of O. imbricatum was performed by colorimetric procedure. Acute toxicity of leaf and root extracts was conductedin two phases; phase I consisted of three groups of mice (n = 3) for each dose level of 10, 100 and 1000 mg/kg while phase II had three mice that received 1600, 2900 or 5000 mg/kg. Wistar rats were grouped into 7 groups that were co-treated with L-NAME and normal saline or L-NAME and hydroethanolic leaf extract (150 and 300 mg/kg) or L-NAME and hydroethanolic root extract (150 and 300 mg/kg) or L-NAME and amlodipine (5 mg/kg) or normal saline only for 4 weeks. Treatment was carried out via the oral route while blood pressure was measured weeklyfor 4 weeks by non-invasive tail cuff method.Results:The phytochemical profile of the leaf and root extracts revealed the presence of phenols, terpenoids, flavonoids, glycosides, tannins, steroids and saponins. Both the leaf and root extracts were toxic at 5000 mg/kg with an LD50of 3807.89 mg/kg. In the fourth week of the study, only the leaf extract significantly (p less 0.01) prevented the progression of L-NAME induced hypertension; systolic and diastolic blood pressure of the group treated with L-NAME and leaf extract (300 mg/kg) were 183 ± 1 and 140 ± 1 mmHg, respectively, compared to the group that was treated with L-NAME and normal saline which produced systolic and diastolic BP values of 213 ± 3 and 172 ± 4 mmHg, respectively. The extracts, especially OIR300, exhibited diuretic effects in the second and third week of study by promoting excretion of 16 and 19 ml urine, respectively, compared to 11 and 14 ml for LN group.Conclusion:The results suggest that O. imbricatum is moderately toxic at a high dose and contains a wide range of phytochemicals which offer partial protection against the development of nitric oxide deficiency hypertension.
- Full Text:
- Date Issued: June-2018
- Authors: Tata, Charlotte, M , Gwebu, Ephraim, T , Olukayode O Aremu , Nkeh-Chungag, Benedicta, N , Oyedeji, Adebola, O , Oyedeji, Opeopluwa, O , Sewani-Rusike, Constance, R
- Date: June-2018
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/11260/4915 , vital:44303 , https://www.ajol.info/index.php/tjpr/article/view/174343
- Description: Purpose:To determine the phytochemical content, toxicity and hypertension prevention effects of Osteospermum imbricatum leaf and root extracts.Methods:Phytochemical screening of leaf and root extracts of O. imbricatum was performed by colorimetric procedure. Acute toxicity of leaf and root extracts was conductedin two phases; phase I consisted of three groups of mice (n = 3) for each dose level of 10, 100 and 1000 mg/kg while phase II had three mice that received 1600, 2900 or 5000 mg/kg. Wistar rats were grouped into 7 groups that were co-treated with L-NAME and normal saline or L-NAME and hydroethanolic leaf extract (150 and 300 mg/kg) or L-NAME and hydroethanolic root extract (150 and 300 mg/kg) or L-NAME and amlodipine (5 mg/kg) or normal saline only for 4 weeks. Treatment was carried out via the oral route while blood pressure was measured weeklyfor 4 weeks by non-invasive tail cuff method.Results:The phytochemical profile of the leaf and root extracts revealed the presence of phenols, terpenoids, flavonoids, glycosides, tannins, steroids and saponins. Both the leaf and root extracts were toxic at 5000 mg/kg with an LD50of 3807.89 mg/kg. In the fourth week of the study, only the leaf extract significantly (p less 0.01) prevented the progression of L-NAME induced hypertension; systolic and diastolic blood pressure of the group treated with L-NAME and leaf extract (300 mg/kg) were 183 ± 1 and 140 ± 1 mmHg, respectively, compared to the group that was treated with L-NAME and normal saline which produced systolic and diastolic BP values of 213 ± 3 and 172 ± 4 mmHg, respectively. The extracts, especially OIR300, exhibited diuretic effects in the second and third week of study by promoting excretion of 16 and 19 ml urine, respectively, compared to 11 and 14 ml for LN group.Conclusion:The results suggest that O. imbricatum is moderately toxic at a high dose and contains a wide range of phytochemicals which offer partial protection against the development of nitric oxide deficiency hypertension.
- Full Text:
- Date Issued: June-2018
Age and growth of Cape stumpnose Rhabdosargus holubi (Pisces: Sparidae) in the Eastern Cape, South Africa
- Farthing, Matthew William, James, Nicola Caroline, Potts, Warren M
- Authors: Farthing, Matthew William , James, Nicola Caroline , Potts, Warren M
- Date: 2016
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/122891 , vital:35365 , https://doi.org/10.2989/1814232X.2016.1156577
- Description: Rhabdosargus holubi (Steindachner, 1881) is a small (maximum size = 450 mm total length; Heemstra and Heemstra 2004) sparid that is distributed along the south-east coast of Africa from St Helena Bay, South Africa, to Maputo, Mozambique (Götz and Cowley 2013). Spawning occurs in the nearshore marine environment primarily during winter, specifically May–August in KwaZulu-Natal (KZN) (Wallace 1975) and July–February in the South-Eastern Cape (Whitfield 1998). Individuals reach 50% sexual maturity at approximately 150 mm standard length (SL) in the Eastern Cape (Whitfield 1998). The early life stages are transported by the south-westward-flowing Agulhas Current, and recruit as post-flexion larvae and early juveniles into estuaries during late winter and early summer (Blaber 1974). The warm temperatures and high nutrient levels in estuaries favour fast growth (Blaber 1973a), and fish spend their first year of life in these environments, migrating back out to sea after reaching approximately 120 mm SL. Some individuals remain trapped in closed estuaries, where they may reach sizes greater than 200 mm SL (James et al. 2007a). Rhabdosargus holubi is the dominant estuarine-dependent marine teleost species recorded in permanently open and temporarily open/closed estuaries in the warm-temperate region, which spans the south, south-east and east coast of South Africa (Harrison 2005). The species is also an important component of the linefishery in many SouthAfrican estuaries (10–15.6% by number) (Pradervand and Baird 2002), particularly in Eastern Cape estuaries (Cowley et al. 2003). These figures underestimate the presence of R. holubi, as most individuals making use of estuaries are young, feeding predominately on filamentous macroalgae and diatom flora, and are generally too small to be caught with hook and line (De Wet and Marais 1990). James et al. (2007b) showed that R. holubi made up 34–92% of the annual seine-net catch in the East Kleinemonde Estuary. Rhabdosargus holubi is also important in the KZN shorebased linefishery, representing 4.6% of the total landed catch (Dunlop and Mann 2012).
- Full Text:
- Date Issued: 2016
- Authors: Farthing, Matthew William , James, Nicola Caroline , Potts, Warren M
- Date: 2016
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/122891 , vital:35365 , https://doi.org/10.2989/1814232X.2016.1156577
- Description: Rhabdosargus holubi (Steindachner, 1881) is a small (maximum size = 450 mm total length; Heemstra and Heemstra 2004) sparid that is distributed along the south-east coast of Africa from St Helena Bay, South Africa, to Maputo, Mozambique (Götz and Cowley 2013). Spawning occurs in the nearshore marine environment primarily during winter, specifically May–August in KwaZulu-Natal (KZN) (Wallace 1975) and July–February in the South-Eastern Cape (Whitfield 1998). Individuals reach 50% sexual maturity at approximately 150 mm standard length (SL) in the Eastern Cape (Whitfield 1998). The early life stages are transported by the south-westward-flowing Agulhas Current, and recruit as post-flexion larvae and early juveniles into estuaries during late winter and early summer (Blaber 1974). The warm temperatures and high nutrient levels in estuaries favour fast growth (Blaber 1973a), and fish spend their first year of life in these environments, migrating back out to sea after reaching approximately 120 mm SL. Some individuals remain trapped in closed estuaries, where they may reach sizes greater than 200 mm SL (James et al. 2007a). Rhabdosargus holubi is the dominant estuarine-dependent marine teleost species recorded in permanently open and temporarily open/closed estuaries in the warm-temperate region, which spans the south, south-east and east coast of South Africa (Harrison 2005). The species is also an important component of the linefishery in many SouthAfrican estuaries (10–15.6% by number) (Pradervand and Baird 2002), particularly in Eastern Cape estuaries (Cowley et al. 2003). These figures underestimate the presence of R. holubi, as most individuals making use of estuaries are young, feeding predominately on filamentous macroalgae and diatom flora, and are generally too small to be caught with hook and line (De Wet and Marais 1990). James et al. (2007b) showed that R. holubi made up 34–92% of the annual seine-net catch in the East Kleinemonde Estuary. Rhabdosargus holubi is also important in the KZN shorebased linefishery, representing 4.6% of the total landed catch (Dunlop and Mann 2012).
- Full Text:
- Date Issued: 2016
Agents sans frontiers: cross-border aquatic weed biological control in the rivers of southern Mozambique
- Langa, Sílvia da Fátima, Hill, Martin P, Compton, Stephen G
- Authors: Langa, Sílvia da Fátima , Hill, Martin P , Compton, Stephen G
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/148998 , vital:38794 , DOI: 10.2989/16085914.2020.1749551
- Description: Biological control is an effective ways of controlling aquatic plants, especially in South Africa. Release of biological control agents has been limited to Mozambique, where water hyacinth (Eichhornia crassipes (Mart.) Solms-Laubach (Pontederiaceae)), water lettuce (Pistia stratiotes L. (Araceae)), red water ferns (Azolla spp. (Azollaceae)) and salvinia (Salvinia molesta DS Mitch. (Salviniaceae)) are significant weeds in the south of the country. In 2009, we assessed the status of these weeds in seven rivers across southern Mozambique and recorded whether any biocontrol agents were present.
- Full Text:
- Date Issued: 2020
- Authors: Langa, Sílvia da Fátima , Hill, Martin P , Compton, Stephen G
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/148998 , vital:38794 , DOI: 10.2989/16085914.2020.1749551
- Description: Biological control is an effective ways of controlling aquatic plants, especially in South Africa. Release of biological control agents has been limited to Mozambique, where water hyacinth (Eichhornia crassipes (Mart.) Solms-Laubach (Pontederiaceae)), water lettuce (Pistia stratiotes L. (Araceae)), red water ferns (Azolla spp. (Azollaceae)) and salvinia (Salvinia molesta DS Mitch. (Salviniaceae)) are significant weeds in the south of the country. In 2009, we assessed the status of these weeds in seven rivers across southern Mozambique and recorded whether any biocontrol agents were present.
- Full Text:
- Date Issued: 2020
AIA's Southern Africa Chronicle - Volume VIII No.2
- Africa Information Afrique (AIA)
- Authors: Africa Information Afrique (AIA)
- Date: 1995
- Subjects: AIA
- Language: English
- Type: text
- Identifier: http://hdl.handle.net/10962/169389 , vital:41745
- Description: Windhoek, January 16,1995 (AIA/Joshua Amupadhi) — Many impoverished Namibians are demanding swifter change to better their lives following elections which restored the ruling SWAPO party to power for another five years. SWAPO, the former guerrilla organisation which fought for the independence of Namibia from apartheid South African rulers, won an easy victory in the first post independence elections in December. Those interviewed say five years were enough for the former liberation movement to have made a good start on improving the standards of living of many previously disadvantaged Namibians and dismantle apartheid structures established during 75 years of South African colonialism. One SWAPO supporter says independence has created only a black elite to join whites in the rich suburban areas but has not narrowed the gap between the rich and poor.
- Full Text:
- Date Issued: 1995
- Authors: Africa Information Afrique (AIA)
- Date: 1995
- Subjects: AIA
- Language: English
- Type: text
- Identifier: http://hdl.handle.net/10962/169389 , vital:41745
- Description: Windhoek, January 16,1995 (AIA/Joshua Amupadhi) — Many impoverished Namibians are demanding swifter change to better their lives following elections which restored the ruling SWAPO party to power for another five years. SWAPO, the former guerrilla organisation which fought for the independence of Namibia from apartheid South African rulers, won an easy victory in the first post independence elections in December. Those interviewed say five years were enough for the former liberation movement to have made a good start on improving the standards of living of many previously disadvantaged Namibians and dismantle apartheid structures established during 75 years of South African colonialism. One SWAPO supporter says independence has created only a black elite to join whites in the rich suburban areas but has not narrowed the gap between the rich and poor.
- Full Text:
- Date Issued: 1995
Alkaline rocks in the Kuboos-Bremen Igneous Province, southern Namibia: the Grootpenseiland and Marinkas Kwela Complexes
- Smithies, Robert H, Marsh, Julian S
- Authors: Smithies, Robert H , Marsh, Julian S
- Date: 1996
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/145838 , vital:38471
- Description: The early Cambrian Kuboos-Bremen Igneous Province of northwestern South Africa and southern Namibia comprises a series of intrusive bodies that collectively encompass virtually the entire range of alkaline rock types. Two of these bodies, the Grootpenseiland and Marinkas Kwela Complexes lie immediately north of the Orange River and are amongst the few that show this wide lithological range on a local scale.
- Full Text:
- Date Issued: 1996
- Authors: Smithies, Robert H , Marsh, Julian S
- Date: 1996
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/145838 , vital:38471
- Description: The early Cambrian Kuboos-Bremen Igneous Province of northwestern South Africa and southern Namibia comprises a series of intrusive bodies that collectively encompass virtually the entire range of alkaline rock types. Two of these bodies, the Grootpenseiland and Marinkas Kwela Complexes lie immediately north of the Orange River and are amongst the few that show this wide lithological range on a local scale.
- Full Text:
- Date Issued: 1996
All mineral wealth to workers
- NUM
- Authors: NUM
- Date: 1982 - 1992
- Subjects: NUM
- Language: English
- Type: text
- Identifier: http://hdl.handle.net/10962/151168 , vital:39035
- Description: Since the formation of our Union the NUM has participated in a number of campaigns ranging from local and union specific to national political campaigns
- Full Text:
- Date Issued: 1982 - 1992
- Authors: NUM
- Date: 1982 - 1992
- Subjects: NUM
- Language: English
- Type: text
- Identifier: http://hdl.handle.net/10962/151168 , vital:39035
- Description: Since the formation of our Union the NUM has participated in a number of campaigns ranging from local and union specific to national political campaigns
- Full Text:
- Date Issued: 1982 - 1992
An experimental test of the allotonic frequency hypothesis to isolate the effects of light pollution on bat prey selection:
- Bailey, Lauren A, Brigham, R Mark, Bohn, Shelby J, Boyles, Justin G, Smit, Ben
- Authors: Bailey, Lauren A , Brigham, R Mark , Bohn, Shelby J , Boyles, Justin G , Smit, Ben
- Date: 2019
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/158309 , vital:40171 , https://0-doi.org.wam.seals.ac.za/10.1007/s00442-019-04417-w
- Description: Artificial lights may be altering interactions between bats and moth prey. According to the allotonic frequency hypothesis (AFH), eared moths are generally unavailable as prey for syntonic bats (i.e., bats that use echolocation frequencies between 20 and 50 kHz within the hearing range of eared moths) due to the moths’ ability to detect syntonic bat echolocation. Syntonic bats therefore feed mainly on beetles, flies, true bugs, and non-eared moths. The AFH is expected to be violated around lights where eared moths are susceptible to exploitation by syntonic bats because moths’ evasive strategies become less effective. The hypothesis has been tested to date almost exclusively in areas with permanent lighting, where the effects of lights on bat diets are confounded with other aspects of human habitat alteration. We undertook diet analysis in areas with short-term, localized artificial lighting to isolate the effects of artificial lighting and determine if syntonic and allotonic bats (i.e., bats that use echolocation frequencies outside the hearing range of eared moths) consumed more moths under conditions of artificial lights than in natural darkness.
- Full Text:
- Date Issued: 2019
- Authors: Bailey, Lauren A , Brigham, R Mark , Bohn, Shelby J , Boyles, Justin G , Smit, Ben
- Date: 2019
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/158309 , vital:40171 , https://0-doi.org.wam.seals.ac.za/10.1007/s00442-019-04417-w
- Description: Artificial lights may be altering interactions between bats and moth prey. According to the allotonic frequency hypothesis (AFH), eared moths are generally unavailable as prey for syntonic bats (i.e., bats that use echolocation frequencies between 20 and 50 kHz within the hearing range of eared moths) due to the moths’ ability to detect syntonic bat echolocation. Syntonic bats therefore feed mainly on beetles, flies, true bugs, and non-eared moths. The AFH is expected to be violated around lights where eared moths are susceptible to exploitation by syntonic bats because moths’ evasive strategies become less effective. The hypothesis has been tested to date almost exclusively in areas with permanent lighting, where the effects of lights on bat diets are confounded with other aspects of human habitat alteration. We undertook diet analysis in areas with short-term, localized artificial lighting to isolate the effects of artificial lighting and determine if syntonic and allotonic bats (i.e., bats that use echolocation frequencies outside the hearing range of eared moths) consumed more moths under conditions of artificial lights than in natural darkness.
- Full Text:
- Date Issued: 2019