Spermiogenesis in three species of cicadas (Hemiptera: Cicadidae)
- Chawanji, A S, Hodgson, Alan N, Villet, Martin H, Sanborn, Allen F, Phillips, P K
- Authors: Chawanji, A S , Hodgson, Alan N , Villet, Martin H , Sanborn, Allen F , Phillips, P K
- Date: 2007
- Language: English
- Type: Article
- Identifier: vital:6865 , http://hdl.handle.net/10962/d1011207
- Description: Spermiogenesis in three species of cicadas representing one cicadettine (Monomatapa matoposa Boulard) and two cicadines (Diceroprocta biconica [Walker] and Kongota punctigera [Walker]) was investigated by light and electron microscopy. Although spermiogenesis was occurring in the testis of adult males of all species, earlier spermiogenic stages were observed in D. biconica only. While spermiogenesis was similar to that described for other insects, some differences were noted. For example granular material did not assemble around the centriole to form a centriolar adjunct but did accumulate in the cytoplasm of early spermatids adjacent to a region of the nuclear membrane where nuclear pores were aggregated. In late spermatids this material accumulated anterior to the mitochondrial derivatives in a developing postero-lateral nuclear groove. While this material has been named the ‘centriolar adjunct’ by previous authors, its formation away from the centriole raises questions about its true identity. Second, during acrosome maturation an ante-acrosomal region of cytoplasm develops. Although present in later spermatids, this region is lost in spermatozoa. Interspecific variations in chromatin condensation patterns and the number of microtubule layers encircling the spermatid nucleus during spermiogenesis were noted.
- Full Text:
- Date Issued: 2007
- Authors: Chawanji, A S , Hodgson, Alan N , Villet, Martin H , Sanborn, Allen F , Phillips, P K
- Date: 2007
- Language: English
- Type: Article
- Identifier: vital:6865 , http://hdl.handle.net/10962/d1011207
- Description: Spermiogenesis in three species of cicadas representing one cicadettine (Monomatapa matoposa Boulard) and two cicadines (Diceroprocta biconica [Walker] and Kongota punctigera [Walker]) was investigated by light and electron microscopy. Although spermiogenesis was occurring in the testis of adult males of all species, earlier spermiogenic stages were observed in D. biconica only. While spermiogenesis was similar to that described for other insects, some differences were noted. For example granular material did not assemble around the centriole to form a centriolar adjunct but did accumulate in the cytoplasm of early spermatids adjacent to a region of the nuclear membrane where nuclear pores were aggregated. In late spermatids this material accumulated anterior to the mitochondrial derivatives in a developing postero-lateral nuclear groove. While this material has been named the ‘centriolar adjunct’ by previous authors, its formation away from the centriole raises questions about its true identity. Second, during acrosome maturation an ante-acrosomal region of cytoplasm develops. Although present in later spermatids, this region is lost in spermatozoa. Interspecific variations in chromatin condensation patterns and the number of microtubule layers encircling the spermatid nucleus during spermiogenesis were noted.
- Full Text:
- Date Issued: 2007
Speaking to power through newspaper editorials in Zimbabwe:
- Nyaungwa, Mathew, Garman, Anthea
- Authors: Nyaungwa, Mathew , Garman, Anthea
- Date: 2019
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/158438 , vital:40186 , https://0-doi.org.wam.seals.ac.za/10.1386/jams.11.1.51_1
- Description: This article seeks to provide an insight into the complex role that editorials – a newspaper’s institutional voice – play in highly polarised political contexts. It focuses on how the editorials of two Zimbabwean daily newspapers – The Herald, a progovernment newspaper, and NewsDay, a perceived pro-opposition newspaper – spoke to those in power at a time of transition from a government of national unity to majoritarian rule in 2013. The study also sets out to understand how both the newspapers’ editorials over this time responded to a contested political domain. Qualitative content analysis, rhetorical analysis and in-depth interviews were used to consider the tactics employed in the editorials to question and challenge the decisions and behaviours of those in positions of authority. The research findings contradict the common view in Zimbabwe that the privately–owned media blindly support the opposition while the state-owned media do the same with ZANU-PF. The findings show that in the period in question both newspapers exploited the editorial as a space to urge politicians to think of the national common good.
- Full Text:
- Date Issued: 2019
- Authors: Nyaungwa, Mathew , Garman, Anthea
- Date: 2019
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/158438 , vital:40186 , https://0-doi.org.wam.seals.ac.za/10.1386/jams.11.1.51_1
- Description: This article seeks to provide an insight into the complex role that editorials – a newspaper’s institutional voice – play in highly polarised political contexts. It focuses on how the editorials of two Zimbabwean daily newspapers – The Herald, a progovernment newspaper, and NewsDay, a perceived pro-opposition newspaper – spoke to those in power at a time of transition from a government of national unity to majoritarian rule in 2013. The study also sets out to understand how both the newspapers’ editorials over this time responded to a contested political domain. Qualitative content analysis, rhetorical analysis and in-depth interviews were used to consider the tactics employed in the editorials to question and challenge the decisions and behaviours of those in positions of authority. The research findings contradict the common view in Zimbabwe that the privately–owned media blindly support the opposition while the state-owned media do the same with ZANU-PF. The findings show that in the period in question both newspapers exploited the editorial as a space to urge politicians to think of the national common good.
- Full Text:
- Date Issued: 2019
Spatial structure of recruitment in the mussel Perna perna at local scales: effects of adults, algae and recruit size
- Erlandsson, Johan, McQuaid, Christopher D
- Authors: Erlandsson, Johan , McQuaid, Christopher D
- Date: 2004
- Language: English
- Type: Article
- Identifier: vital:6898 , http://hdl.handle.net/10962/d1011660
- Description: To test the assumption that there is no spatial structure in small-scale recruitment variability of rocky shore mussels, we examined spatial dependence in the distribution of density of recruits (late plantigrades: 0.5 to 3.5 mm; larger recruits: 3.5 to 10 mm) and adults of the brown mussel Perna perna within local scales (30 lags ranging between 0.35 and 10.5 m) in mid- and upper mussel beds. Spatial heterogeneity was estimated by analyzing scaling properties of semivariograms using a fractal approach. Relationships between density of mussel recruits and adults and biomass of the red alga Gelidium pristoides at the different scales were examined by cross-semivariograms. We found that the distribution of adults showed spatial dependence at all transects, often with higher spatial heterogeneity (higher fractal dimension, D) at smaller scales (1st scaling region). The distribution of larger recruits exhibited spatial dependence at all transects, revealing a spatial structure, which was related to that of adults. In contrast, the distribution of late plantigrades showed mainly spatial independence (random pattern; 1.97 < D ≤ 2). Densities of both size classes of recruits were positively related to those of adults at all transects and scales, but the relationship was stronger for larger recruits than late plantigrades, explaining why there was clearer spatial structure of larger recruits. The relationship with algae was mainly negative for larger recruits, while it tended to be positive at many scales for late plantigrades. Thus, both adult mussels and G. pristoides are suitable habitats for plantigrades, while mussels are the main habitat for larger recruits. This may mean that recruits on algae either die or migrate to mussel clumps at a certain size. This study highlights the importance of recruit size when analyzing recruitment patchiness of mussels, and has implications for sustainable management of P. perna.
- Full Text:
- Date Issued: 2004
- Authors: Erlandsson, Johan , McQuaid, Christopher D
- Date: 2004
- Language: English
- Type: Article
- Identifier: vital:6898 , http://hdl.handle.net/10962/d1011660
- Description: To test the assumption that there is no spatial structure in small-scale recruitment variability of rocky shore mussels, we examined spatial dependence in the distribution of density of recruits (late plantigrades: 0.5 to 3.5 mm; larger recruits: 3.5 to 10 mm) and adults of the brown mussel Perna perna within local scales (30 lags ranging between 0.35 and 10.5 m) in mid- and upper mussel beds. Spatial heterogeneity was estimated by analyzing scaling properties of semivariograms using a fractal approach. Relationships between density of mussel recruits and adults and biomass of the red alga Gelidium pristoides at the different scales were examined by cross-semivariograms. We found that the distribution of adults showed spatial dependence at all transects, often with higher spatial heterogeneity (higher fractal dimension, D) at smaller scales (1st scaling region). The distribution of larger recruits exhibited spatial dependence at all transects, revealing a spatial structure, which was related to that of adults. In contrast, the distribution of late plantigrades showed mainly spatial independence (random pattern; 1.97 < D ≤ 2). Densities of both size classes of recruits were positively related to those of adults at all transects and scales, but the relationship was stronger for larger recruits than late plantigrades, explaining why there was clearer spatial structure of larger recruits. The relationship with algae was mainly negative for larger recruits, while it tended to be positive at many scales for late plantigrades. Thus, both adult mussels and G. pristoides are suitable habitats for plantigrades, while mussels are the main habitat for larger recruits. This may mean that recruits on algae either die or migrate to mussel clumps at a certain size. This study highlights the importance of recruit size when analyzing recruitment patchiness of mussels, and has implications for sustainable management of P. perna.
- Full Text:
- Date Issued: 2004
Spatial description of hake-directed fishing activity off the west coast of South Africa
- Fairweather, T P, Booth, Anthony J, Sauer, Warwick H H, Leslie, R W
- Authors: Fairweather, T P , Booth, Anthony J , Sauer, Warwick H H , Leslie, R W
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/127031 , vital:35945 , https://doi.10.2989/18142320609504129
- Description: Historically, the two species of Cape hakes Merluccius capensis and M. paradoxus off South Africa were commercially exploited exclusively by demersal trawling. In 1994, hake-directed demersal longline was introduced on an experimental basis, and in 1998 was initiated as a commercial fishing sector. The effect of a combined fleet composed of both trawlers and longliners on the Cape hake resource is not fully understood. Analysis of fishing intensity and catch-rate data revealed that the highest catch rates were found around the 400m and 500m isobaths for the trawl and longline fisheries respectively. Catch rates from both fishing sectors were also noted to be higher over sediments with a sand component. Differences between areas of the highest fishing intensity and highest catch rates were noted. In addition to other factors, it is suggested that a ‘friction of distance’ effect applies — vessels will trade-off higher catch rates with the increased costs associated with fishing in deeper waters.
- Full Text:
- Date Issued: 2010
- Authors: Fairweather, T P , Booth, Anthony J , Sauer, Warwick H H , Leslie, R W
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/127031 , vital:35945 , https://doi.10.2989/18142320609504129
- Description: Historically, the two species of Cape hakes Merluccius capensis and M. paradoxus off South Africa were commercially exploited exclusively by demersal trawling. In 1994, hake-directed demersal longline was introduced on an experimental basis, and in 1998 was initiated as a commercial fishing sector. The effect of a combined fleet composed of both trawlers and longliners on the Cape hake resource is not fully understood. Analysis of fishing intensity and catch-rate data revealed that the highest catch rates were found around the 400m and 500m isobaths for the trawl and longline fisheries respectively. Catch rates from both fishing sectors were also noted to be higher over sediments with a sand component. Differences between areas of the highest fishing intensity and highest catch rates were noted. In addition to other factors, it is suggested that a ‘friction of distance’ effect applies — vessels will trade-off higher catch rates with the increased costs associated with fishing in deeper waters.
- Full Text:
- Date Issued: 2010
South African estuaries in the Anthropocene
- Authors: Perissinotto, Renzo
- Subjects: Estuaries -- South Africa , Geology, Stratigraphic -- Anthropocene , f-sa
- Language: English
- Type: text , Lectures
- Identifier: http://hdl.handle.net/10948/20977 , vital:29424
- Description: In the new geological epoch of total human dominance of the planet, already widely referred to as the “Anthropocene”, estuaries are among the most vulnerable ecosystems to the changes that man’s activities have imposed on the coastal zone. For the non-specialist, an estuary is a “semi-enclosed coastal body of water, which has a permanent or temporary connection with the open sea, and within which sea water is diluted with fresh water from land drainage”.
- Full Text:
- Authors: Perissinotto, Renzo
- Subjects: Estuaries -- South Africa , Geology, Stratigraphic -- Anthropocene , f-sa
- Language: English
- Type: text , Lectures
- Identifier: http://hdl.handle.net/10948/20977 , vital:29424
- Description: In the new geological epoch of total human dominance of the planet, already widely referred to as the “Anthropocene”, estuaries are among the most vulnerable ecosystems to the changes that man’s activities have imposed on the coastal zone. For the non-specialist, an estuary is a “semi-enclosed coastal body of water, which has a permanent or temporary connection with the open sea, and within which sea water is diluted with fresh water from land drainage”.
- Full Text:
Sociodemographic inequities associated with participation in leisure-time physical activity in sub-Saharan Africa: an individual participant data meta-analysis
- Longo-Mbenza, Benjamin, Barr, Anna Louise, Partap, Uttara, Young, Elizabeth H, Agoudavi, Kokou, Balde, Naby, Kagaruki, Gibson B, Mayige, Mary T, Mutungi, Gerald, Mwalim, Omar, Wesseh, Chea S, Bahendeka, Silver K, Guwatudde, David, Jørgensen, Jutta M Adelin, Bovet, Pascal, Motala, Ayesha A, Sandhu, Manjinder S
- Authors: Longo-Mbenza, Benjamin , Barr, Anna Louise , Partap, Uttara , Young, Elizabeth H , Agoudavi, Kokou , Balde, Naby , Kagaruki, Gibson B , Mayige, Mary T , Mutungi, Gerald , Mwalim, Omar , Wesseh, Chea S , Bahendeka, Silver K , Guwatudde, David , Jørgensen, Jutta M Adelin , Bovet, Pascal , Motala, Ayesha A , Sandhu, Manjinder S
- Date: 2020-06-15
- Subjects: Recreation. Use of leisure time , Occupational therapy , Health surveys
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/11260/3378 , vital:43337 , https://doi.org/10.1186/s12889-020-08987-w
- Description: Leisure-time physical activity (LTPA) is an important contributor to total physical activity and the focus of many interventions promoting activity in high-income populations. Little is known about LTPA in subSaharan Africa (SSA), and with expected declines in physical activity due to rapid urbanisation and lifestyle changes we aimed to assess the sociodemographic differences in the prevalence of LTPA in the adult populations of this region to identify potential barriers for equitable participation. A two-step individual participant data meta-analysis was conducted using data collected in SSA through 10 population health surveys that included the Global Physical Activity Questionnaire. For each sociodemographic characteristic, the pooled adjusted prevalence and risk ratios (RRs) for participation in LTPA were calculated using the random effects method. Between-study heterogeneity was explored through meta-regression analyses and tests for interaction. Across the 10 populations (N = 26,022), 18.9% (95%CI: 14.3, 24.1; I2 = 99.0%) of adults (≥ 18 years) participated in LTPA. Men were more likely to participate in LTPA compared with women (RR for women: 0.43; 95%CI: 0.32, 0.60; P less than 0.001; I2 = 97.5%), while age was inversely associated with participation. Higher levels of education were associated with increased LTPA participation (RR: 1.30; 95%CI: 1.09, 1.55; P = 0.004; I2 = 98.1%), with those living in rural areas or self-employed less likely to participate in LTPA. These associations remained after adjusting for time spent physically active at work or through active travel. In these populations, participation in LTPA was low, and strongly associated with sex, age, education, self-employment and urban residence. Identifying the potential barriers that reduce participation in these groups is necessary to enable equitable access to the health and social benefits associated with LTPA.
- Full Text:
- Date Issued: 2020-06-15
- Authors: Longo-Mbenza, Benjamin , Barr, Anna Louise , Partap, Uttara , Young, Elizabeth H , Agoudavi, Kokou , Balde, Naby , Kagaruki, Gibson B , Mayige, Mary T , Mutungi, Gerald , Mwalim, Omar , Wesseh, Chea S , Bahendeka, Silver K , Guwatudde, David , Jørgensen, Jutta M Adelin , Bovet, Pascal , Motala, Ayesha A , Sandhu, Manjinder S
- Date: 2020-06-15
- Subjects: Recreation. Use of leisure time , Occupational therapy , Health surveys
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/11260/3378 , vital:43337 , https://doi.org/10.1186/s12889-020-08987-w
- Description: Leisure-time physical activity (LTPA) is an important contributor to total physical activity and the focus of many interventions promoting activity in high-income populations. Little is known about LTPA in subSaharan Africa (SSA), and with expected declines in physical activity due to rapid urbanisation and lifestyle changes we aimed to assess the sociodemographic differences in the prevalence of LTPA in the adult populations of this region to identify potential barriers for equitable participation. A two-step individual participant data meta-analysis was conducted using data collected in SSA through 10 population health surveys that included the Global Physical Activity Questionnaire. For each sociodemographic characteristic, the pooled adjusted prevalence and risk ratios (RRs) for participation in LTPA were calculated using the random effects method. Between-study heterogeneity was explored through meta-regression analyses and tests for interaction. Across the 10 populations (N = 26,022), 18.9% (95%CI: 14.3, 24.1; I2 = 99.0%) of adults (≥ 18 years) participated in LTPA. Men were more likely to participate in LTPA compared with women (RR for women: 0.43; 95%CI: 0.32, 0.60; P less than 0.001; I2 = 97.5%), while age was inversely associated with participation. Higher levels of education were associated with increased LTPA participation (RR: 1.30; 95%CI: 1.09, 1.55; P = 0.004; I2 = 98.1%), with those living in rural areas or self-employed less likely to participate in LTPA. These associations remained after adjusting for time spent physically active at work or through active travel. In these populations, participation in LTPA was low, and strongly associated with sex, age, education, self-employment and urban residence. Identifying the potential barriers that reduce participation in these groups is necessary to enable equitable access to the health and social benefits associated with LTPA.
- Full Text:
- Date Issued: 2020-06-15
Simultaneous liposomal encapsulation of antibiotics and proteins: co-loading and characterization of rifampicin and Human Serum Albumin in soy-liposomes
- Bapolisi, Alain M, Nkanga, Christian I, Walker, Roderick B, Krause, Rui W M
- Authors: Bapolisi, Alain M , Nkanga, Christian I , Walker, Roderick B , Krause, Rui W M
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/148617 , vital:38755 , https://doi.org/10.1016/j.jddst.2020.101751
- Description: The recurrent development of resistance to antimicrobial agents threatens the ability for successful treatment of infectious diseases. Hydrophobic antibiotics such as rifampicin (Rif) are particularly affected due to poor bioavailability. On the other hand, proteins play important roles in drug delivery and release. Further, the combination of antimicrobials with therapeutic proteins and their encapsulation in liposomes seems a promising approach for improvement of antimicrobial efficacy. This study aimed to encapsulate Rif simultaneously with a large protein, Human Serum Albumin (HSA) in liposomes made from an inexpensive crude soy lecithin (CSL).
- Full Text:
- Date Issued: 2020
- Authors: Bapolisi, Alain M , Nkanga, Christian I , Walker, Roderick B , Krause, Rui W M
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/148617 , vital:38755 , https://doi.org/10.1016/j.jddst.2020.101751
- Description: The recurrent development of resistance to antimicrobial agents threatens the ability for successful treatment of infectious diseases. Hydrophobic antibiotics such as rifampicin (Rif) are particularly affected due to poor bioavailability. On the other hand, proteins play important roles in drug delivery and release. Further, the combination of antimicrobials with therapeutic proteins and their encapsulation in liposomes seems a promising approach for improvement of antimicrobial efficacy. This study aimed to encapsulate Rif simultaneously with a large protein, Human Serum Albumin (HSA) in liposomes made from an inexpensive crude soy lecithin (CSL).
- Full Text:
- Date Issued: 2020
Scientific frontiers in the management of coral reefs
- Aswani, Shankar, Mumby, Peter J, Baker, Andrew, Christie, Patrick, McCook, Laurence J, Steneck, Robert S, Richmond, Robert H
- Authors: Aswani, Shankar , Mumby, Peter J , Baker, Andrew , Christie, Patrick , McCook, Laurence J , Steneck, Robert S , Richmond, Robert H
- Date: 2015
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/70582 , vital:29677 , https://doi.org/10.3389/fmars.2015.00050
- Description: Coral reefs are subjected globally to a variety of natural and anthropogenic stressors that often act synergistically. Today, reversing ongoing and future coral reef degradation presents significant challenges and countering this negative trend will take considerable efforts and investments. Scientific knowledge can inform and guide the requisite decision-making process and offer practical solutions to the problem of protection as the effects of climate change exacerbate. However, implementation of solutions presently lags far behind the pace required to reverse global declines, and there is a need for an urgent and significant step-up in the extent and range of strategies being implemented. In this paper, we consider scientific frontiers in natural and social science research that can help build stronger support for reef management and improve the efficacy of interventions. We cover various areas including: (1) enhancing the case for reef conservation and management, (2) dealing with local stressors on reefs, (3) addressing global climate change impacts, (4) and reviewing various approaches to the governance of coral reefs. In sum, we consider scientific frontiers in natural and social science that will require further attention in coming years as managers work toward building stronger support for reef management and improve the efficacy of local interventions.
- Full Text:
- Date Issued: 2015
- Authors: Aswani, Shankar , Mumby, Peter J , Baker, Andrew , Christie, Patrick , McCook, Laurence J , Steneck, Robert S , Richmond, Robert H
- Date: 2015
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/70582 , vital:29677 , https://doi.org/10.3389/fmars.2015.00050
- Description: Coral reefs are subjected globally to a variety of natural and anthropogenic stressors that often act synergistically. Today, reversing ongoing and future coral reef degradation presents significant challenges and countering this negative trend will take considerable efforts and investments. Scientific knowledge can inform and guide the requisite decision-making process and offer practical solutions to the problem of protection as the effects of climate change exacerbate. However, implementation of solutions presently lags far behind the pace required to reverse global declines, and there is a need for an urgent and significant step-up in the extent and range of strategies being implemented. In this paper, we consider scientific frontiers in natural and social science research that can help build stronger support for reef management and improve the efficacy of interventions. We cover various areas including: (1) enhancing the case for reef conservation and management, (2) dealing with local stressors on reefs, (3) addressing global climate change impacts, (4) and reviewing various approaches to the governance of coral reefs. In sum, we consider scientific frontiers in natural and social science that will require further attention in coming years as managers work toward building stronger support for reef management and improve the efficacy of local interventions.
- Full Text:
- Date Issued: 2015
Riding the waves: Journalism education in post-apartheid South Africa
- Garman, Anthea, van der Merwe, Mia
- Authors: Garman, Anthea , van der Merwe, Mia
- Date: 2017
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/158405 , vital:40181 , https://0-doi.org.wam.seals.ac.za/10.1177/1077695817720679
- Description: Since 1994, South African journalism education has undergone waves of introspection about curricula and methods of teaching as educators respond to the challenging realities of the post-apartheid environment. The most recent challenge to journalism educators is the student protests which started at the end of 2015, questioning the high costs of education and demanding “decolonization” of curricula. The traditional alignment with media companies has also been upended as the drastic contraction of newsrooms removes the promise of jobs upon graduation and the swiftly shifting digital terrain rearranges the financial basis of all journalism. These factors introduce a dynamism and uncertainty into South African journalism that educators are compelled to respond to with imagination and principle.
- Full Text:
- Date Issued: 2017
- Authors: Garman, Anthea , van der Merwe, Mia
- Date: 2017
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/158405 , vital:40181 , https://0-doi.org.wam.seals.ac.za/10.1177/1077695817720679
- Description: Since 1994, South African journalism education has undergone waves of introspection about curricula and methods of teaching as educators respond to the challenging realities of the post-apartheid environment. The most recent challenge to journalism educators is the student protests which started at the end of 2015, questioning the high costs of education and demanding “decolonization” of curricula. The traditional alignment with media companies has also been upended as the drastic contraction of newsrooms removes the promise of jobs upon graduation and the swiftly shifting digital terrain rearranges the financial basis of all journalism. These factors introduce a dynamism and uncertainty into South African journalism that educators are compelled to respond to with imagination and principle.
- Full Text:
- Date Issued: 2017
Rhodes University Graduation Ceremony 1956
- Authors: Rhodes University
- Date: 1956
- Language: English
- Type: text
- Identifier: vital:8090 , http://hdl.handle.net/10962/d1004400
- Description: Rhodes University Graduation Ceremony in the University Great Hall on Friday , 6th April, 1956 at 8 p.m. [and] Graduation Ceremony held in April 1956: University College of Fort Hare. Graduation Ceremony at Fort Hare on Friday, April 27th ,1956 at 10:00a.m.
- Full Text:
- Date Issued: 1956
- Authors: Rhodes University
- Date: 1956
- Language: English
- Type: text
- Identifier: vital:8090 , http://hdl.handle.net/10962/d1004400
- Description: Rhodes University Graduation Ceremony in the University Great Hall on Friday , 6th April, 1956 at 8 p.m. [and] Graduation Ceremony held in April 1956: University College of Fort Hare. Graduation Ceremony at Fort Hare on Friday, April 27th ,1956 at 10:00a.m.
- Full Text:
- Date Issued: 1956
Rhodes University 1986 Graduation Ceremonies Address
- Authors: Henderson, Derek Scott
- Date: 1986
- Language: English
- Type: text
- Identifier: vital:7517 , http://hdl.handle.net/10962/d1018394
- Full Text:
- Date Issued: 1986
- Authors: Henderson, Derek Scott
- Date: 1986
- Language: English
- Type: text
- Identifier: vital:7517 , http://hdl.handle.net/10962/d1018394
- Full Text:
- Date Issued: 1986
Rhodes University 1981 Graduation Ceremonies Address
- Authors: Henderson, Derek Scott
- Date: 1981
- Language: English
- Type: text
- Identifier: vital:7428 , http://hdl.handle.net/10962/d1018305
- Full Text:
- Date Issued: 1981
- Authors: Henderson, Derek Scott
- Date: 1981
- Language: English
- Type: text
- Identifier: vital:7428 , http://hdl.handle.net/10962/d1018305
- Full Text:
- Date Issued: 1981
Retracted COVID-19 Papers and the level of 'citation pollution': a preliminary analysis and directions for future research
- Van der Walt, Wynand, Willems, Kris A, Friedrich, Wernher, Hatsu, Sylvester, Krauss, Kirstin
- Authors: Van der Walt, Wynand , Willems, Kris A , Friedrich, Wernher , Hatsu, Sylvester , Krauss, Kirstin
- Date: 2020
- Subjects: Retraction watch , Research -- Evaluation , Bibliographical citations -- Evaluation , Science publishing -- Corrupt practices , Scholarly publishing -- Corrupt practices , Learning and scholarship -- Corrupt practices , Medical publishing -- Corrupt practices , COVID-19 (Disease) -- Publishing
- Language: English
- Type: Article , text
- Identifier: http://hdl.handle.net/10962/167732 , vital:41508 , https://www.abd-bvd.be/nl/bladen-voor-documentatie/2020-3-4/
- Description: Retraction Watch maintains a "running list" of retracted papers on Covid-19 related research. By the end of September 2020, thirty-three retracted Covid-19 papers were listed. We analysed these retracted papers, focusing specifically on how they have been cited by review papers, and subsequently how they have penetrated and potentially distorted public discourse and legitimate research on Covid-19. The study demonstrates the need for more in-depth studies that focus on the phenomenon of citation pollution. We show that the "Covid-19 publication race", amplified by a pressure-to-publish research culture, distorted published science on Covid-19. We highlight the urgency to engage popular media and critical decision makers on how to distinguish between questionable and legitimate science. We also emphasise the importance of dealing with illegitimate research in a timely manner, both from a scholarly communications and research quality perspective. , Retraction Watch maintient une "liste courante" des articles rétractés sur les recherches liées au Covid-19. Fin septembre 2020, trente-trois articles rétractés sur le Covid-19 étaient répertoriés. Nous avons analysé ces articles rétractés, en nous concentrant spécifiquement sur la façon dont ils ont été cités par d'autres articles, et ensuite sur la façon dont ils ont pénétré et potentiellement faussé le discours public et la recherche légitime sur le Covid-19. L'étude démontre le besoin d'études plus approfondies qui se concentrent sur le phénomène de la pollution des citations. Nous montrons que la "course à la publication sur le Covid-19", amplifiée par une culture de la pression à la publication de la recherche, a déformé l'information scientifique publiée sur le Covid-19. Nous soulignons l'urgence d'engager les médias populaires et les décideurs critiques sur la manière de distinguer la science douteuse de la science légitime. Nous soulignons également l'importance de traiter rapidement les recherches illégitimes, tant du point de vue de la communication scientifique que de la qualité de la recherche. , Retraction Watch houdt een "lopende lijst" bij van ingetrokken papieren over Covid-19-gerelateerd onderzoek. Eind september 2020 waren drieëndertig ingetrokken Covid-19 papieren op de lijst geplaatst. We hebben deze ingetrokken papieren geanalyseerd, waarbij we ons specifiek hebben gericht op de manier waarop ze zijn geciteerd door review papers, en vervolgens op de manier waarop ze zijn doorgedrongen en mogelijk vervormd in het publieke discours en het legitieme onderzoek naar Covid-19. De studie toont aan dat er behoefte is aan meer diepgaande studies die zich richten op het fenomeen van de citatievervuiling. We tonen aan dat de "Covid-19-publicatierace", versterkt door een druk om te publiceren onderzoekscultuur, de gepubliceerde wetenschap over Covid-19 vertekend heeft. We benadrukken de urgentie om de populaire media en kritische besluitvormers te betrekken bij het maken van een onderscheid tussen twijfelachtige en legitieme wetenschap. We benadrukken ook het belang van het tijdig aanpakken van onrechtmatig onderzoek, zowel vanuit het oogpunt van wetenschappelijke communicatie als vanuit het oogpunt van de kwaliteit van het onderzoek.
- Full Text:
- Date Issued: 2020
- Authors: Van der Walt, Wynand , Willems, Kris A , Friedrich, Wernher , Hatsu, Sylvester , Krauss, Kirstin
- Date: 2020
- Subjects: Retraction watch , Research -- Evaluation , Bibliographical citations -- Evaluation , Science publishing -- Corrupt practices , Scholarly publishing -- Corrupt practices , Learning and scholarship -- Corrupt practices , Medical publishing -- Corrupt practices , COVID-19 (Disease) -- Publishing
- Language: English
- Type: Article , text
- Identifier: http://hdl.handle.net/10962/167732 , vital:41508 , https://www.abd-bvd.be/nl/bladen-voor-documentatie/2020-3-4/
- Description: Retraction Watch maintains a "running list" of retracted papers on Covid-19 related research. By the end of September 2020, thirty-three retracted Covid-19 papers were listed. We analysed these retracted papers, focusing specifically on how they have been cited by review papers, and subsequently how they have penetrated and potentially distorted public discourse and legitimate research on Covid-19. The study demonstrates the need for more in-depth studies that focus on the phenomenon of citation pollution. We show that the "Covid-19 publication race", amplified by a pressure-to-publish research culture, distorted published science on Covid-19. We highlight the urgency to engage popular media and critical decision makers on how to distinguish between questionable and legitimate science. We also emphasise the importance of dealing with illegitimate research in a timely manner, both from a scholarly communications and research quality perspective. , Retraction Watch maintient une "liste courante" des articles rétractés sur les recherches liées au Covid-19. Fin septembre 2020, trente-trois articles rétractés sur le Covid-19 étaient répertoriés. Nous avons analysé ces articles rétractés, en nous concentrant spécifiquement sur la façon dont ils ont été cités par d'autres articles, et ensuite sur la façon dont ils ont pénétré et potentiellement faussé le discours public et la recherche légitime sur le Covid-19. L'étude démontre le besoin d'études plus approfondies qui se concentrent sur le phénomène de la pollution des citations. Nous montrons que la "course à la publication sur le Covid-19", amplifiée par une culture de la pression à la publication de la recherche, a déformé l'information scientifique publiée sur le Covid-19. Nous soulignons l'urgence d'engager les médias populaires et les décideurs critiques sur la manière de distinguer la science douteuse de la science légitime. Nous soulignons également l'importance de traiter rapidement les recherches illégitimes, tant du point de vue de la communication scientifique que de la qualité de la recherche. , Retraction Watch houdt een "lopende lijst" bij van ingetrokken papieren over Covid-19-gerelateerd onderzoek. Eind september 2020 waren drieëndertig ingetrokken Covid-19 papieren op de lijst geplaatst. We hebben deze ingetrokken papieren geanalyseerd, waarbij we ons specifiek hebben gericht op de manier waarop ze zijn geciteerd door review papers, en vervolgens op de manier waarop ze zijn doorgedrongen en mogelijk vervormd in het publieke discours en het legitieme onderzoek naar Covid-19. De studie toont aan dat er behoefte is aan meer diepgaande studies die zich richten op het fenomeen van de citatievervuiling. We tonen aan dat de "Covid-19-publicatierace", versterkt door een druk om te publiceren onderzoekscultuur, de gepubliceerde wetenschap over Covid-19 vertekend heeft. We benadrukken de urgentie om de populaire media en kritische besluitvormers te betrekken bij het maken van een onderscheid tussen twijfelachtige en legitieme wetenschap. We benadrukken ook het belang van het tijdig aanpakken van onrechtmatig onderzoek, zowel vanuit het oogpunt van wetenschappelijke communicatie als vanuit het oogpunt van de kwaliteit van het onderzoek.
- Full Text:
- Date Issued: 2020
Rethinking ICT4D Impact Assessments: reflections from the Siyakhula Living Lab in South Africa
- Mthoko, Hafeni, Khene, Caroline
- Authors: Mthoko, Hafeni , Khene, Caroline
- Date: 2019
- Language: English
- Type: text , conference paper
- Identifier: http://hdl.handle.net/10962/105286 , vital:32495 , https://doi.org/10.1007/978-3-030-11235-6_4
- Description: The approach to outcome and impact assessments of ICTD has often relied solely on identifying project effects in relation to project baseline data; however, such an approach limits the potential learning that could be occurring throughout a project’s lifecycle. Impact assessments should be conducted in a comprehensive manner, taking into account the evaluation data that has been captured from the initiation of the project through to its implementation, and beyond. This study sought to reflect on the implementation of an impact assessment framework that is based on a comprehensive approach to evaluation. The framework was implemented in the Siyakhula Living Lab to assess for its outcomes and impacts on the community. A pragmatic approach was applied through a reflective process, to assess the utility of the framework within this context. Semi-structured interviews with project stakeholders were conducted to further gain insight into the comprehensive approach to conducting impact assessments. It was found that a comprehensive approach to assessing impacts provided a meaningful way to understand the effects of the ICTD initiative, and provided an overview of project areas that required improvement. However, it was found that the proposed assessment framework required a customisation component in order to modify it to better suit the project context. The way in which future impact assessments are conducted can draw on the lessons gained from following a more comprehensive approach to evaluation, and thus improve learning over time.
- Full Text: false
- Date Issued: 2019
- Authors: Mthoko, Hafeni , Khene, Caroline
- Date: 2019
- Language: English
- Type: text , conference paper
- Identifier: http://hdl.handle.net/10962/105286 , vital:32495 , https://doi.org/10.1007/978-3-030-11235-6_4
- Description: The approach to outcome and impact assessments of ICTD has often relied solely on identifying project effects in relation to project baseline data; however, such an approach limits the potential learning that could be occurring throughout a project’s lifecycle. Impact assessments should be conducted in a comprehensive manner, taking into account the evaluation data that has been captured from the initiation of the project through to its implementation, and beyond. This study sought to reflect on the implementation of an impact assessment framework that is based on a comprehensive approach to evaluation. The framework was implemented in the Siyakhula Living Lab to assess for its outcomes and impacts on the community. A pragmatic approach was applied through a reflective process, to assess the utility of the framework within this context. Semi-structured interviews with project stakeholders were conducted to further gain insight into the comprehensive approach to conducting impact assessments. It was found that a comprehensive approach to assessing impacts provided a meaningful way to understand the effects of the ICTD initiative, and provided an overview of project areas that required improvement. However, it was found that the proposed assessment framework required a customisation component in order to modify it to better suit the project context. The way in which future impact assessments are conducted can draw on the lessons gained from following a more comprehensive approach to evaluation, and thus improve learning over time.
- Full Text: false
- Date Issued: 2019
Remembering the Late Nelson Rolihlahla Mandela Through the Eyes of the Poet:
- Authors: Kaschula, Russell H
- Date: 2018
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/174912 , vital:42521 , https://doi.org/10.1080/1013929X.2018.1439860
- Description: This article seeks to explore the life and post-democratic work of President Mandela through the eyes of the poet. More specifically, two moments in time are captured and analysed, namely, Mandela’s release from prison together with the lead up to the first democratic South African elections in 1994; and his passing in 2013. This analysis includes the work of poets such as Bongani Sitole, Maya Angelou, Raphael d’Abdon and Thabo Mbeki. The mechanics of translation and the interrelatedness of orality and literacy are explored. The poetic memory contained in this article presents us with an approximation towards the collage of collective memory in a country where economics, politics, and society still present multiple challenges, and where political power often challenges the true collective memory.
- Full Text:
- Date Issued: 2018
- Authors: Kaschula, Russell H
- Date: 2018
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/174912 , vital:42521 , https://doi.org/10.1080/1013929X.2018.1439860
- Description: This article seeks to explore the life and post-democratic work of President Mandela through the eyes of the poet. More specifically, two moments in time are captured and analysed, namely, Mandela’s release from prison together with the lead up to the first democratic South African elections in 1994; and his passing in 2013. This analysis includes the work of poets such as Bongani Sitole, Maya Angelou, Raphael d’Abdon and Thabo Mbeki. The mechanics of translation and the interrelatedness of orality and literacy are explored. The poetic memory contained in this article presents us with an approximation towards the collage of collective memory in a country where economics, politics, and society still present multiple challenges, and where political power often challenges the true collective memory.
- Full Text:
- Date Issued: 2018
Regional development in South Africa’s West Coast: 'dividends on the process side'?
- Bek, David, Binns, Tony, Nel, Etienne L
- Authors: Bek, David , Binns, Tony , Nel, Etienne L
- Date: 2005
- Language: English
- Type: Article
- Identifier: vital:6674 , http://hdl.handle.net/10962/d1006648
- Description: Academics, policy-makers and consultants have been increasingly focusing upon the 'region' as the crucible of economic development. This regionalist approach places institutions at the centre of the process of stimulating growth. Much debate has been ongoing in academic circles, particularly those inhabited by economic geographers, about the veracity of the regionalist approach and the explanatory power of the terminology associated with it. This paper analyses explicit efforts to engender regional economic development in the West Coast of South Africa. Our empirical evaluation indicates that policy actors have sought to upgrade the institutional infrastructure of the region and that some significant achievements are evident within this realm. However, these achievements are yet to be associated with sustained regional economic takeoff. The paper concludes by asking searching questions about the ability of the regionalist approach to deliver meaningful socio-economic transformation.
- Full Text:
- Date Issued: 2005
- Authors: Bek, David , Binns, Tony , Nel, Etienne L
- Date: 2005
- Language: English
- Type: Article
- Identifier: vital:6674 , http://hdl.handle.net/10962/d1006648
- Description: Academics, policy-makers and consultants have been increasingly focusing upon the 'region' as the crucible of economic development. This regionalist approach places institutions at the centre of the process of stimulating growth. Much debate has been ongoing in academic circles, particularly those inhabited by economic geographers, about the veracity of the regionalist approach and the explanatory power of the terminology associated with it. This paper analyses explicit efforts to engender regional economic development in the West Coast of South Africa. Our empirical evaluation indicates that policy actors have sought to upgrade the institutional infrastructure of the region and that some significant achievements are evident within this realm. However, these achievements are yet to be associated with sustained regional economic takeoff. The paper concludes by asking searching questions about the ability of the regionalist approach to deliver meaningful socio-economic transformation.
- Full Text:
- Date Issued: 2005
Recruiters Guidelines
- COSATU
- Authors: COSATU
- Date: 2001
- Subjects: COSATU
- Language: English
- Type: text
- Identifier: http://hdl.handle.net/10962/109753 , vital:33186
- Description: The purpose of this booklet is to touch in number of areas, which are important at this point for the recruitment campaign of the federation. It is not meant even by implication to provide details of how to handle the campaign what it does is to highlight issues and areas that we must think in the preparation for this campaign. More importantly is the fact that COSATU remains the biggest federation in South Africa and fastest growing international. Beside a loss of membership from + 2 million to + 1.8 million members. The decrease in membership is mostly because of retrenchments. The well known fact is that only about 40% of the workforce that is unionized. The aim of the recruitment drive is to access this 60% that is not unionized. The mistake must not be committed to think that the 40%, which is unionized, belong to COSATU. There are two other federations plus number of non-affiliated unions. Our commitment to One Country One Federation does not stop us to recruit from other unions as long as we remain under different bodies. This October campaign coincides with Red October campaign of the SACP and Health and Safety month of the federation this must be seen as strength than lack of co-ordination. One area that is link to recruitment is the servicing of membership. It is useless to recruit and fail to service membership because every campaign that we will take around recruitment we may find ourselves had to fight with disgruntled members and obviously it will be difficult to attract new members. This must say to us that members come first.
- Full Text:
- Date Issued: 2001
- Authors: COSATU
- Date: 2001
- Subjects: COSATU
- Language: English
- Type: text
- Identifier: http://hdl.handle.net/10962/109753 , vital:33186
- Description: The purpose of this booklet is to touch in number of areas, which are important at this point for the recruitment campaign of the federation. It is not meant even by implication to provide details of how to handle the campaign what it does is to highlight issues and areas that we must think in the preparation for this campaign. More importantly is the fact that COSATU remains the biggest federation in South Africa and fastest growing international. Beside a loss of membership from + 2 million to + 1.8 million members. The decrease in membership is mostly because of retrenchments. The well known fact is that only about 40% of the workforce that is unionized. The aim of the recruitment drive is to access this 60% that is not unionized. The mistake must not be committed to think that the 40%, which is unionized, belong to COSATU. There are two other federations plus number of non-affiliated unions. Our commitment to One Country One Federation does not stop us to recruit from other unions as long as we remain under different bodies. This October campaign coincides with Red October campaign of the SACP and Health and Safety month of the federation this must be seen as strength than lack of co-ordination. One area that is link to recruitment is the servicing of membership. It is useless to recruit and fail to service membership because every campaign that we will take around recruitment we may find ourselves had to fight with disgruntled members and obviously it will be difficult to attract new members. This must say to us that members come first.
- Full Text:
- Date Issued: 2001
Raymond Mhlaba, the Premier of the Eastern Cape
- Authors: Orie, Tembeka
- Date: 1994
- Subjects: Mhlaba, Raymond, 1920- African National Congress -- History African National Congress -- Youth League Africans -- Government relations Banning of persons -- South Africa Government, Resistance to -- South Africa Labor unions -- South Africa Mhlaba family New Brighton (Port Elizabeth, South Africa) -- History Political prisoners -- South Africa Port Elizabeth (South Africa) -- History
- Language: English
- Type: Manuscript , text
- Identifier: http://hdl.handle.net/10962/2769 , vital:20324
- Description: Raymond Mpakamisi Mhlaba remains a mystery to tire public. Little is known about his, background and bow he has earned his premiership. The public is presently perplexed by his leadership qualities; his inaccessibility and his co-ordinating abilities to provide direction and leadership in the Eastern Cape province. What his vision is on implementing die reconstruction and development program, seems to be one of die anxieties experienced by the public presently. This paper endeavours to illuminate Mhlaba's past in order to explain and clarify who he is. This would help to see if there are any discrepancies between his past and the present, and what die challenges are to Mhlaba and to the public. , Digitised by Rhodes University Library on behalf of the Institute of Social and Economic Research (ISER)
- Full Text:
- Date Issued: 1994
- Authors: Orie, Tembeka
- Date: 1994
- Subjects: Mhlaba, Raymond, 1920- African National Congress -- History African National Congress -- Youth League Africans -- Government relations Banning of persons -- South Africa Government, Resistance to -- South Africa Labor unions -- South Africa Mhlaba family New Brighton (Port Elizabeth, South Africa) -- History Political prisoners -- South Africa Port Elizabeth (South Africa) -- History
- Language: English
- Type: Manuscript , text
- Identifier: http://hdl.handle.net/10962/2769 , vital:20324
- Description: Raymond Mpakamisi Mhlaba remains a mystery to tire public. Little is known about his, background and bow he has earned his premiership. The public is presently perplexed by his leadership qualities; his inaccessibility and his co-ordinating abilities to provide direction and leadership in the Eastern Cape province. What his vision is on implementing die reconstruction and development program, seems to be one of die anxieties experienced by the public presently. This paper endeavours to illuminate Mhlaba's past in order to explain and clarify who he is. This would help to see if there are any discrepancies between his past and the present, and what die challenges are to Mhlaba and to the public. , Digitised by Rhodes University Library on behalf of the Institute of Social and Economic Research (ISER)
- Full Text:
- Date Issued: 1994
Quality of life in South Africa: the first ten years of democracy
- Authors: Moller, Valerie
- Date: 2007
- Language: English
- Type: Article
- Identifier: vital:7110 , http://hdl.handle.net/10962/d1010741
- Description: South Africa celebrated ten years of democracy in 2004. This special issue of Social Indicators Research (SIR) reviews developments that have impacted on the quality of life of ordinary South Africans during the transition period. The issue updates an earlier volume of SIR (Volume 41) published in 1997 and as a stand-alone volume. The earlier volume was initiated following SIR editor Alex Michalos’ first visit to South Africa. This update on quality of life in South Africa follows on his return visit to the country in 2004 to see firsthand the changes that had occured in the meantime. This introductory article outlines major achievements of and setbacks for the new democracy and the challenges facing it in future. It provides the backround for the evaluations of a range of quality of life domains and issues including poverty and inequality, crime, the HIV/AIDS epidemic, migration and housing, religiosity, reconciliation, and optimism for the future which are covered in the eleven articles that follow. The introduction divides the articles under the headings of challenges, achievements, monitoring quality of life, and social capital for the future. The overview article concludes that improvements in quality of life have been uneven but goodwill and a positive outlook bode well for South African quality of life in future.
- Full Text:
- Date Issued: 2007
- Authors: Moller, Valerie
- Date: 2007
- Language: English
- Type: Article
- Identifier: vital:7110 , http://hdl.handle.net/10962/d1010741
- Description: South Africa celebrated ten years of democracy in 2004. This special issue of Social Indicators Research (SIR) reviews developments that have impacted on the quality of life of ordinary South Africans during the transition period. The issue updates an earlier volume of SIR (Volume 41) published in 1997 and as a stand-alone volume. The earlier volume was initiated following SIR editor Alex Michalos’ first visit to South Africa. This update on quality of life in South Africa follows on his return visit to the country in 2004 to see firsthand the changes that had occured in the meantime. This introductory article outlines major achievements of and setbacks for the new democracy and the challenges facing it in future. It provides the backround for the evaluations of a range of quality of life domains and issues including poverty and inequality, crime, the HIV/AIDS epidemic, migration and housing, religiosity, reconciliation, and optimism for the future which are covered in the eleven articles that follow. The introduction divides the articles under the headings of challenges, achievements, monitoring quality of life, and social capital for the future. The overview article concludes that improvements in quality of life have been uneven but goodwill and a positive outlook bode well for South African quality of life in future.
- Full Text:
- Date Issued: 2007
Predictor variables for moggel (Labeo umbratus) biomass and production in small South African reservoirs
- Potts, Warren M, Booth, Anthony J, Hecht, Thomas, Andrew, Timothy G
- Authors: Potts, Warren M , Booth, Anthony J , Hecht, Thomas , Andrew, Timothy G
- Date: 2006
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/125763 , vital:35815 , https://doi.10.2989/16085910609503877
- Description: South Africa has approximately 3 100 registered reservoirs, ranging in size from 1–1 000 hectares, with a surface area totalling 84 439 hectares (SADC Surface Water Body Database, unpublished data). Within southern and eastern Africa, Lindqvist (1994) estimated the number of small reservoirs to be between 50 000 and 100 000. Given Bernacsek’s (1986) estimate of the total fishery potential of small reservoirs in Africa at between 1 and 2.3 million tons, this number of reservoirs clearly could provide fishery opportunities for rural communities.
- Full Text:
- Date Issued: 2006
- Authors: Potts, Warren M , Booth, Anthony J , Hecht, Thomas , Andrew, Timothy G
- Date: 2006
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/125763 , vital:35815 , https://doi.10.2989/16085910609503877
- Description: South Africa has approximately 3 100 registered reservoirs, ranging in size from 1–1 000 hectares, with a surface area totalling 84 439 hectares (SADC Surface Water Body Database, unpublished data). Within southern and eastern Africa, Lindqvist (1994) estimated the number of small reservoirs to be between 50 000 and 100 000. Given Bernacsek’s (1986) estimate of the total fishery potential of small reservoirs in Africa at between 1 and 2.3 million tons, this number of reservoirs clearly could provide fishery opportunities for rural communities.
- Full Text:
- Date Issued: 2006