Shakespeare's Victorian Stage: performing history in the theatre of Charles Kean, Richard W. Schoch: book review
- Authors: Wright, Laurence
- Date: 2004
- Language: English
- Type: text , article
- Identifier: vital:7050 , http://hdl.handle.net/10962/d1007393 , http://hdl.handle.net/10520/EJC48030
- Description: preprint , This book is a primarily a study of Charles Kean’s productions of Shakespeare’s English chronicle plays at the Princess’s Theatre between 1852 and 1859, a period crucial to the development of ideas of English nationalism. Schoch focuses on these particular stagings as more than drama; as performances of nineteenth century theories of history and historical representation. His project operates under the aegis of the so-called ‘linguistic turn’ in cultural theory, and is suspicious of neo-marxian fundamentalism.
- Full Text:
- Date Issued: 2004
- Authors: Wright, Laurence
- Date: 2004
- Language: English
- Type: text , article
- Identifier: vital:7050 , http://hdl.handle.net/10962/d1007393 , http://hdl.handle.net/10520/EJC48030
- Description: preprint , This book is a primarily a study of Charles Kean’s productions of Shakespeare’s English chronicle plays at the Princess’s Theatre between 1852 and 1859, a period crucial to the development of ideas of English nationalism. Schoch focuses on these particular stagings as more than drama; as performances of nineteenth century theories of history and historical representation. His project operates under the aegis of the so-called ‘linguistic turn’ in cultural theory, and is suspicious of neo-marxian fundamentalism.
- Full Text:
- Date Issued: 2004
Emerging patterns of abstraction in environmental education: A review of materials, methods and professional development perspectives
- O'Donoghue, Rob B, Russo, Vladimir
- Authors: O'Donoghue, Rob B , Russo, Vladimir
- Date: 2004
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/373610 , vital:66707 , xlink:href="https://doi.org/10.1080/1350462042000258170"
- Description: The epistemic unconscious is the history of the field. And it is clear that, to secure some chance of really knowing what one is doing, one has to unfold what is inscribed in the various relations of implication in which the thinker and his thoughts are caught up, that is, the presuppositions he engages and the inclusions and exclusions he unwittingly performs. (Bourdieu, 2000, p. 99).
- Full Text:
- Date Issued: 2004
- Authors: O'Donoghue, Rob B , Russo, Vladimir
- Date: 2004
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/373610 , vital:66707 , xlink:href="https://doi.org/10.1080/1350462042000258170"
- Description: The epistemic unconscious is the history of the field. And it is clear that, to secure some chance of really knowing what one is doing, one has to unfold what is inscribed in the various relations of implication in which the thinker and his thoughts are caught up, that is, the presuppositions he engages and the inclusions and exclusions he unwittingly performs. (Bourdieu, 2000, p. 99).
- Full Text:
- Date Issued: 2004
Umabatha: global and local
- Authors: Wright, Laurence
- Date: 2004
- Language: English
- Type: text , article
- Identifier: vital:7032 , http://hdl.handle.net/10962/d1007364 , https://doi.org/10.1080/00138390408691324
- Description: preprint , There can be few shows that test the dimensions and pitfalls of 'globalised' theatre as thoroughly as Welcome Msomi's Umabatha. The worldwide success of the show, in box-office terms, can hardly be argued with. And yet, in its very conception, the vehicle is so riven by intrinsic cultural, theatrical, class and 'nationist' tensions that different audiences cannot but reap utterly different experiences, depending on their own cultural and intellectual inheritance.The show is an instance where theatre practice (sometimes) obfuscates political and aesthetic discourse, showing how easily cultures miss each other and fail to connect, and how easily specific historical, geographical and imperial associations are swamped by shallow 'globalised' audience response.
- Full Text:
- Date Issued: 2004
- Authors: Wright, Laurence
- Date: 2004
- Language: English
- Type: text , article
- Identifier: vital:7032 , http://hdl.handle.net/10962/d1007364 , https://doi.org/10.1080/00138390408691324
- Description: preprint , There can be few shows that test the dimensions and pitfalls of 'globalised' theatre as thoroughly as Welcome Msomi's Umabatha. The worldwide success of the show, in box-office terms, can hardly be argued with. And yet, in its very conception, the vehicle is so riven by intrinsic cultural, theatrical, class and 'nationist' tensions that different audiences cannot but reap utterly different experiences, depending on their own cultural and intellectual inheritance.The show is an instance where theatre practice (sometimes) obfuscates political and aesthetic discourse, showing how easily cultures miss each other and fail to connect, and how easily specific historical, geographical and imperial associations are swamped by shallow 'globalised' audience response.
- Full Text:
- Date Issued: 2004
Petrology and geochemistry of early cretaceous bimodal continental flood volcanism of the NW Etendeka, Namibia Part 2: characteristics and petrogenesis of the high-Ti latite and high-Ti and low-Ti voluminous quartz latite eruptives
- Ewart, A, Marsh, Julian S, Milner, Simon C, Duncan, Andrew R, Kamber, B S, Armstrong, R A
- Authors: Ewart, A , Marsh, Julian S , Milner, Simon C , Duncan, Andrew R , Kamber, B S , Armstrong, R A
- Date: 2004
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/150593 , vital:38987 , https://doi.org/10.1093/petrology/egg082
- Description: As a result of their relative concentration towards the respective Atlantic margins, the silicic eruptives of the Paraná (Brazil)–Etendeka large igneous province are disproportionately abundant in the Etendeka of Namibia. The NW Etendeka silicic units, dated at ∼132 Ma, occupy the upper stratigraphic levels of the volcanic sequences, restricted to the coastal zone, and comprise three latites and five quartz latites (QL).
- Full Text: false
- Date Issued: 2004
- Authors: Ewart, A , Marsh, Julian S , Milner, Simon C , Duncan, Andrew R , Kamber, B S , Armstrong, R A
- Date: 2004
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/150593 , vital:38987 , https://doi.org/10.1093/petrology/egg082
- Description: As a result of their relative concentration towards the respective Atlantic margins, the silicic eruptives of the Paraná (Brazil)–Etendeka large igneous province are disproportionately abundant in the Etendeka of Namibia. The NW Etendeka silicic units, dated at ∼132 Ma, occupy the upper stratigraphic levels of the volcanic sequences, restricted to the coastal zone, and comprise three latites and five quartz latites (QL).
- Full Text: false
- Date Issued: 2004
Determination of 2′, 3′-Dideoxyinosine Using Iron (II) Phthalocyanine Modified Carbon Paste Electrode
- Ozoemena, Kenneth I, Stefan, Raluca-Ioana, Nyokong, Tebello
- Authors: Ozoemena, Kenneth I , Stefan, Raluca-Ioana , Nyokong, Tebello
- Date: 2004
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/300298 , vital:57914 , xlink:href="https://doi.org/10.1081/AL-200031940"
- Description: An amperometric sensor, based on carbon paste impregnated with iron (II) phthalocyanine complex (FePc), has been constructed for the assay of anti‐HIV agent dideoxyinosine (didanosine, DDI). Using chronoamperometry (E = +1.04 V versus Ag/AgCl) technique, the amperometric sensor can be used reliably for dideoxyinosine assay at pH 7.4 phosphate buffer in the 1.5–9.5 nmol/L concentration range with a detection limit of 5.7 × 10−10 mol/L. The surface of the electrode can easily be regenerated by simple polishing, obtaining a fresh surface ready for use in a new assay. The new amperometric sensor proved to be highly reliable for the assay of dideoxyinosine purity in raw material as well as for the uniformity content test of Videx® tablets.
- Full Text:
- Date Issued: 2004
- Authors: Ozoemena, Kenneth I , Stefan, Raluca-Ioana , Nyokong, Tebello
- Date: 2004
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/300298 , vital:57914 , xlink:href="https://doi.org/10.1081/AL-200031940"
- Description: An amperometric sensor, based on carbon paste impregnated with iron (II) phthalocyanine complex (FePc), has been constructed for the assay of anti‐HIV agent dideoxyinosine (didanosine, DDI). Using chronoamperometry (E = +1.04 V versus Ag/AgCl) technique, the amperometric sensor can be used reliably for dideoxyinosine assay at pH 7.4 phosphate buffer in the 1.5–9.5 nmol/L concentration range with a detection limit of 5.7 × 10−10 mol/L. The surface of the electrode can easily be regenerated by simple polishing, obtaining a fresh surface ready for use in a new assay. The new amperometric sensor proved to be highly reliable for the assay of dideoxyinosine purity in raw material as well as for the uniformity content test of Videx® tablets.
- Full Text:
- Date Issued: 2004
More media for Southern Africa?: the place of politics, economics and convergence in developing media density
- Authors: Berger, Guy
- Date: 2007
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/147825 , vital:38676 , https://0-doi.org.wam.seals.ac.za/10.1080/02560240485310041
- Description: In line with global trends, media in Southern Africa in the past decade has been moving slowly towards mergers, partnerships and multi-platform publishing. Driven by politics and facilitated by technology, the process has had to confront the difficulty of establishing viable economic models, the lack of regional integration within Southern African countries, and what is sometimes a difficult political environment. Markets remain largely national or local and economically weak. Print media faces huge hurdles. Broadcast media density is improving, partly through noncommercial mechanisms. News websites are understaffed, lacking in viable survival strategies and skills, and are incompletely integrated with parent media platforms. Economic pressures, however, are likely to force Southern African media operations into greater synergies in search of survival. The various convergences entailed may increase media density.
- Full Text:
- Date Issued: 2007
- Authors: Berger, Guy
- Date: 2007
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/147825 , vital:38676 , https://0-doi.org.wam.seals.ac.za/10.1080/02560240485310041
- Description: In line with global trends, media in Southern Africa in the past decade has been moving slowly towards mergers, partnerships and multi-platform publishing. Driven by politics and facilitated by technology, the process has had to confront the difficulty of establishing viable economic models, the lack of regional integration within Southern African countries, and what is sometimes a difficult political environment. Markets remain largely national or local and economically weak. Print media faces huge hurdles. Broadcast media density is improving, partly through noncommercial mechanisms. News websites are understaffed, lacking in viable survival strategies and skills, and are incompletely integrated with parent media platforms. Economic pressures, however, are likely to force Southern African media operations into greater synergies in search of survival. The various convergences entailed may increase media density.
- Full Text:
- Date Issued: 2007
Interesting times, 1954-2004: a short history of the Institute of Social and Economic Research, Rhodes University
- Authors: Whisson, Michael G., 1937-
- Date: 2004
- Subjects: Research institutes -- South Africa -- History -- 20th century , Social sciences -- Research , Economics -- Research
- Language: English
- Type: Book , text
- Identifier: vital:553 , http://hdl.handle.net/10962/d1020595 , ISBN 0868104051
- Description: On entering the Rhodes University Institute of Social and Economic Research (ISER) at 6 Prince Alfred Street, visitors are confronted by a glass cabinet in which is displayed the four volumes of the Keiskammahoek Rural Survey (1947-1952); six of the volumes which emanated from the Border Regional Survey (1956-1964) of which three are the Xhosa in Town trilogy, and a modest paperback From Reserve To Region (1997), which records the changes which took place in Keiskammahoek between the birth of apartheid in 1948 and its demise in 1994. Together these may be seen as the charter documents of the ISER - rooted in empirical research in the Eastern Cape, multidisciplinary, substantial works of scholarship and, in the case of The Xhosa in Town trilogy, at least, of international repute.
- Full Text:
- Date Issued: 2004
- Authors: Whisson, Michael G., 1937-
- Date: 2004
- Subjects: Research institutes -- South Africa -- History -- 20th century , Social sciences -- Research , Economics -- Research
- Language: English
- Type: Book , text
- Identifier: vital:553 , http://hdl.handle.net/10962/d1020595 , ISBN 0868104051
- Description: On entering the Rhodes University Institute of Social and Economic Research (ISER) at 6 Prince Alfred Street, visitors are confronted by a glass cabinet in which is displayed the four volumes of the Keiskammahoek Rural Survey (1947-1952); six of the volumes which emanated from the Border Regional Survey (1956-1964) of which three are the Xhosa in Town trilogy, and a modest paperback From Reserve To Region (1997), which records the changes which took place in Keiskammahoek between the birth of apartheid in 1948 and its demise in 1994. Together these may be seen as the charter documents of the ISER - rooted in empirical research in the Eastern Cape, multidisciplinary, substantial works of scholarship and, in the case of The Xhosa in Town trilogy, at least, of international repute.
- Full Text:
- Date Issued: 2004
Competition for attachment of aquaculture candidate probiotic and pathogenic bacteria on fish intestinal mucus:
- Vine, Niall G, Leukes, W D, Kaiser, Horst, Daya, Santylal, Baxter, Jeremy, Hecht, Thomas
- Authors: Vine, Niall G , Leukes, W D , Kaiser, Horst , Daya, Santylal , Baxter, Jeremy , Hecht, Thomas
- Date: 2004
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/142819 , vital:38120 , DOI: 10.1111/j.1365-2761.2004.00542.x
- Description: Probiotics for aquaculture are generally only selected by their ability to produce antimicrobial metabolites; however, attachment to intestinal mucus is important in order to remain within the gut of its host. Five candidate probiotics (AP1–AP5), isolated from the clownfish, Amphiprion percula (Lacepéde), were examined for their ability to attach to fish intestinal mucus and compete with two pathogens, Aeromonas hydrophila and Vibrio alginolyticus. Two different radioactive isotopes were used to quantify competition between pathogens and probionts. Attachment of the pathogens was enhanced by the presence of the candidate probiotics. However, the addition of the candidate probiotics after the pathogens resulted in reduced pathogen attachment.
- Full Text:
- Date Issued: 2004
- Authors: Vine, Niall G , Leukes, W D , Kaiser, Horst , Daya, Santylal , Baxter, Jeremy , Hecht, Thomas
- Date: 2004
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/142819 , vital:38120 , DOI: 10.1111/j.1365-2761.2004.00542.x
- Description: Probiotics for aquaculture are generally only selected by their ability to produce antimicrobial metabolites; however, attachment to intestinal mucus is important in order to remain within the gut of its host. Five candidate probiotics (AP1–AP5), isolated from the clownfish, Amphiprion percula (Lacepéde), were examined for their ability to attach to fish intestinal mucus and compete with two pathogens, Aeromonas hydrophila and Vibrio alginolyticus. Two different radioactive isotopes were used to quantify competition between pathogens and probionts. Attachment of the pathogens was enhanced by the presence of the candidate probiotics. However, the addition of the candidate probiotics after the pathogens resulted in reduced pathogen attachment.
- Full Text:
- Date Issued: 2004
In situ feeding rates of the copepods, Pseudodiaptomus hessei and Acartia longipatella, in a temperate, temporarily open/closed Eastern Cape estuary
- Authors: Froneman, P William
- Date: 2004
- Language: English
- Type: text , Article
- Identifier: vital:6901 , http://hdl.handle.net/10962/d1011754
- Description: Size-fractionated chlorophyll-a (chl-a) concentrations and the in situ grazing rates of the copepods, Pseudodiaptomus hessei and Acartia longipatella, were assessed seasonally at the temporarily open/closed Kasouga estuary situated along the southeast coast of southern Africa. Total integrated chl-a concentration ranged between 1.17 and 12.18 mg chl-a m^(–3) and was always dominated by small phytoplankton cells (<20 μm), which comprised up to 86% (range 64–86%) of the total pigment. Total zooplankton abundance ranged between 2676 and 62 043 individuals m^(–3). These copepods numerically dominated the zooplankton counts, accounting for between 79% and 91% of the total. Gut pigment concentrations of the two species at night were significantly higher than the daytime values (P<0.05 in all cases). The observed pattern could be related to the marked diurnal vertical migration patterns exhibited by the copepods. Gut evacuation rates of P. hessei during the study ranged between 0.29 and 0.77 h^(–1) and between 0.39 and 0.58 h^(–1) for A. longipatella. The rate of gut pigment destruction for P. hessei and A. longipatella ranged between 55% and 81% and between 88% and 92% of the total chl-a ingested, respectively. The combined grazing impact of the two copepods ranged between 0.65 and 4.37 mg chl-a m^(–3), or between 4.3% and 35.9% of the available chl-a in the water column. Variations in the grazing activity of the two species could be attributed largely to seasonality in water temperature and shifts in the phytoplankton community structure and zooplankton abundance.
- Full Text:
- Date Issued: 2004
- Authors: Froneman, P William
- Date: 2004
- Language: English
- Type: text , Article
- Identifier: vital:6901 , http://hdl.handle.net/10962/d1011754
- Description: Size-fractionated chlorophyll-a (chl-a) concentrations and the in situ grazing rates of the copepods, Pseudodiaptomus hessei and Acartia longipatella, were assessed seasonally at the temporarily open/closed Kasouga estuary situated along the southeast coast of southern Africa. Total integrated chl-a concentration ranged between 1.17 and 12.18 mg chl-a m^(–3) and was always dominated by small phytoplankton cells (<20 μm), which comprised up to 86% (range 64–86%) of the total pigment. Total zooplankton abundance ranged between 2676 and 62 043 individuals m^(–3). These copepods numerically dominated the zooplankton counts, accounting for between 79% and 91% of the total. Gut pigment concentrations of the two species at night were significantly higher than the daytime values (P<0.05 in all cases). The observed pattern could be related to the marked diurnal vertical migration patterns exhibited by the copepods. Gut evacuation rates of P. hessei during the study ranged between 0.29 and 0.77 h^(–1) and between 0.39 and 0.58 h^(–1) for A. longipatella. The rate of gut pigment destruction for P. hessei and A. longipatella ranged between 55% and 81% and between 88% and 92% of the total chl-a ingested, respectively. The combined grazing impact of the two copepods ranged between 0.65 and 4.37 mg chl-a m^(–3), or between 4.3% and 35.9% of the available chl-a in the water column. Variations in the grazing activity of the two species could be attributed largely to seasonality in water temperature and shifts in the phytoplankton community structure and zooplankton abundance.
- Full Text:
- Date Issued: 2004
The renaissance in optical spectroscopy of phthalocyanines and other tetraazaporphyrins
- Nyokong, Tebello, Isago, Hiroaki
- Authors: Nyokong, Tebello , Isago, Hiroaki
- Date: 2004
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/289388 , vital:56628 , xlink:href="https://doi.org/10.1142/S1088424604000453"
- Description: Spectral properties of metallophthalocyanines and other tetraazaporphyrins are governed mainly by the Q band which originates from the π-π* transitions within the ring. The position and intensity of the Q band is important in tailoring new phthalocyanine derivatives for particular applications. Aggregation, the nature of the central metal, π conjugation, symmetry of the molecules, and axial, peripheral or non-peripheral substitutions affect the spectra and hence the properties of the phthalocyanine molecule. This review gives a brief outline on how optical spectroscopy provides useful informations on molecular and electronic structures, chemistry and physics of phthalocyanines and other tetraazaporphyrins.
- Full Text:
- Date Issued: 2004
- Authors: Nyokong, Tebello , Isago, Hiroaki
- Date: 2004
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/289388 , vital:56628 , xlink:href="https://doi.org/10.1142/S1088424604000453"
- Description: Spectral properties of metallophthalocyanines and other tetraazaporphyrins are governed mainly by the Q band which originates from the π-π* transitions within the ring. The position and intensity of the Q band is important in tailoring new phthalocyanine derivatives for particular applications. Aggregation, the nature of the central metal, π conjugation, symmetry of the molecules, and axial, peripheral or non-peripheral substitutions affect the spectra and hence the properties of the phthalocyanine molecule. This review gives a brief outline on how optical spectroscopy provides useful informations on molecular and electronic structures, chemistry and physics of phthalocyanines and other tetraazaporphyrins.
- Full Text:
- Date Issued: 2004
The new media maelstrom:
- Authors: Berger, Guy
- Date: 2004
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/159192 , vital:40276 , https://hdl.handle.net/10520/EJC146201
- Description: South Africa's democracy decade coincided with the popularisation of the Internet on a global scale. New society, new media, it seemed.
- Full Text:
- Date Issued: 2004
- Authors: Berger, Guy
- Date: 2004
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/159192 , vital:40276 , https://hdl.handle.net/10520/EJC146201
- Description: South Africa's democracy decade coincided with the popularisation of the Internet on a global scale. New society, new media, it seemed.
- Full Text:
- Date Issued: 2004
Revision of the Indo-Pacific dottyback fish subfamily Pseudochrominae (Perciformes:Pseudochromidae)
- Authors: Gill, Anthony C
- Date: 2004
- Subjects: Fishes -- Indo-Pacific Region -- Classification , Pseudochromidae
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/137669 , vital:37548
- Description: The 100 nominal species in the pseudochromid subfamily Pseudochrominae are referred to 70 valid species, and an additional ten species are described as new. These species are assigned to ten genera: Assiculoides Gill & Hutchins, 1997, Assiculus Richardson, 1846, Cypho Myers, 1940, Labracinns Schlegel, 1858, Ogilbyina Fowler, 1931, Pseudochromis Riippell, 1835, and four new genera, Manonichthvs, Oxvcercichthys, Pholidochromis and Pictichromis. In previous recent studies only two genera, Labracinns and Pseudochromis , had been generally recognised; species assigned to the remaining genera had been previously placed in Pseudochromis. Species included in the subfamily are: Assiculoides desmonotus Gill & Hutchins, 1997 (Western Australia); Assiculus punctatus Richardson, 1846 (northwestern Australia); Cypho purpurascens (De Vis, 1884) (southwest Pacific); C. zaps sp. nov. (Indonesia to Ryukyu Ids); Labracinns atrofasciatus (Herre, 1933) (Culion, Philippines); L. cyclophthalmus (Muller & Troschel, 1849) (Japan to northwestern Australia, Papua New Guinea); L. lineatus (Castelnau, 1875) (Western Australia); Manonichthvs a/leni sp. nov. (Sabah, Borneo); M. paranox (Lubbock & Goldman, 1976) (Solomon Ids, Papua New Guinea, Great Barrier Reef); M. polynemus (Fowler, 1931) (northeastern Indonesia, Belau); M. splendens (Fowler, 1931) (southeastern Indonesia); M. winterbottomi sp nov. (Cebu, Philippines); Ogilbyina novaehollandiae (Steindachner, 1880) (southern Great Barrier Reef and Queensland); O. queenslandiae (Saville-Kent, 1893) (Queensland, Great Barrier Reef); O. salvati (Plessis & Fourmanoir, 1966) (New Caledonia); Oxvcercichthys veliferus (Lubbock, 1980) (Great Barrier Reef, western Coral Sea); Pholidochromis marginata (Lubbock, 1980) (northeastern Indonesia to Bougainville); Pictichromis aurifrons (Lubbock, 1980) (New Guinea); P. coralensis sp. nov. (Great Barrier Reef to New Caledonia); P. diadema (Lubbock & Randall, 1978) (Malaysia to Philippines and northern Borneo); P. ephippiata (Gill, Pyle & Earle, 1996) (northern Sulawesi, southeastern Papua New Guinea); P. paccagnellae (Axelrod, 1973) (Indonesia, Timor Sea to Solomon Ids); P. porphyrea (Lubbock & Goldman, 1974) (Ryukyu Ids and northeastern Indonesia to Marshall Ids and Tonga); Pseudochromis aldabraensis Bauchot-Boutin, 1958 (Aldabra, northwestern Indian Ocean); P. alticaudex sp. nov. (northeastern Indonesia to Solomon Ids); P. andamanensis Lubbock, 1980 (Andaman Sea to Timor Sea, Australia); P. aureolineatus sp. nov. (Comoro Ids); P. aurulentus Gill & Randall, 1998 (Komodo Id, Indonesia); P. bitaeniatus (Fowler, 1931) (Philippines to Timor Sea, Australia, Solomon Ids); P. caudalis Boulenger, 1898 (Arabian Sea to Sri Lanka); P. coccinicauda (Tickell, 1888) (Laccadive Ids to central Indonesia); P. colei Herre, 1933 (Culion, Philippines); P. cometes Gill & Randall, 1998 (Komodo Id, Indonesia); P. cyanotaenia Bleeker, 1857 (Japan to Australia and Vanuatu); P dilectus Lubbock, 1976 (Sri Lanka); P. dixurus Lubbock, 1975 (Red Sea); P. dutoiti Smith, 1955 (east coast of Africa); P. elongatus Lubbock, 1980 (eastern Indonesia); P. flammicauda Lubbock & Goldman, 1976 (Great Barrier Reef); P. flavivertex Riippell, 1835 (Red Sea); P. flavopunctatus Gill & Randall, 1998 (Komodo Id, Indonesia); P. fowleri Herre, 1934 (Philippines and Sabah, Borneo); P. fridmani Klausewitz, 1968 (Red Sea); P. fuscus Muller & Troschel, 1849 (Sri Lanka to Vanuatu); P. howsoni Allen, 1995 (northwestern Australia); P. jamesi Schultz, 1943 (southwest Pacific); P kolythrus Gill & Winterbottom, 1993 (New Caledonia); P. kristinae sp. nov. (east coast of Africa to Madagascar); P. leucorhynchus Lubbock, 1977 (Kenya to Oman); P. linda Randall & Stanaland, 1989 (Gulf of Aden to Pakistan); P. litus Gill & Randall, 1998 (southeastern Indonesia); P. luteus Aoyagi, 1943 (Ryukyu Ids to Philippines); P. madagascariensis sp. nov. (northeastern Madagascar); P. magnificus Lubbock, 1977 (Cargados Carajos Shoals); P. marshallensis Schultz, 1953 (Western Australia to Marshall Ids); P. melanurus sp. nov. (Fiji and Tonga); P. melas Lubbock, 1977 (east coast of Africa); P. mooii sp. nov. (Komodo Id, Indonesia); P. moorei Fowler, 1931 (Philippines); P. natalensis Regan, 1916 (east coast of Africa); P. nigrovittatus Boulenger, 1897 (Red Sea, Gulf of Aden, Socotra to Persian Gulf); P- olivaceus Riippell, 1835 (Red Sea); P. omanensis Gill & Mee, 1993 (Oman); P. persicus Murray, 1887 (Persian Gulf to Pakistan); P. perspicillatus Gunther, 1862 (Philippines and Indonesia); P. pesi Lubbock, 1975 (Red Sea); P. pictus Gill & Randall, 1998 (Alor Id, Indonesia); P. punctatus Kotthaus, 1970 (Somalia and southern Oman); P. pylei Randall & McCosker, 1989 (southeastern Indonesia and Belau); P quinquedentatus McCulloch, 1926 (northern Australia); P. ransonneti Steindachner, 1870 (Gulf of Thailand to Seribu Ids, Indonesia); P. reticulatus Gill & Woodland, 1992 (northwestern Australia); P. sankeyi Lubbock, 1975 (southern Red Sea, Gulf of Aden); P. springeri Lubbock, 1975 (Red Sea); P. steenei Gill & Randall, 1992 (southern Indonesia); P. striatus Gill, Shao & Chen, 1995 (Philippines, Taiwan, Ryukyu Ids); P. tapeinosoma Bleeker, 1853 (Andaman Sea to Solomon Ids); P. tauberae Lubbock, 1977 (east coast of Africa to Madagascar); P. viridis Gill & Allen, 1996 (Christmas Id, Indian Ocean); and P. wilsoni Whitley, 1929 (northern Australia). A key to genera and keys to species within genera are provided. Synonymy lists, suggested vernacular names, morphological descriptions, habitat notes, and distribution maps are given for each species. Photographs showing live and/or freshly dead colourations (including sexual and other intraspecific variation) are provided for all but a few species.
- Full Text:
- Date Issued: 2004
- Authors: Gill, Anthony C
- Date: 2004
- Subjects: Fishes -- Indo-Pacific Region -- Classification , Pseudochromidae
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/137669 , vital:37548
- Description: The 100 nominal species in the pseudochromid subfamily Pseudochrominae are referred to 70 valid species, and an additional ten species are described as new. These species are assigned to ten genera: Assiculoides Gill & Hutchins, 1997, Assiculus Richardson, 1846, Cypho Myers, 1940, Labracinns Schlegel, 1858, Ogilbyina Fowler, 1931, Pseudochromis Riippell, 1835, and four new genera, Manonichthvs, Oxvcercichthys, Pholidochromis and Pictichromis. In previous recent studies only two genera, Labracinns and Pseudochromis , had been generally recognised; species assigned to the remaining genera had been previously placed in Pseudochromis. Species included in the subfamily are: Assiculoides desmonotus Gill & Hutchins, 1997 (Western Australia); Assiculus punctatus Richardson, 1846 (northwestern Australia); Cypho purpurascens (De Vis, 1884) (southwest Pacific); C. zaps sp. nov. (Indonesia to Ryukyu Ids); Labracinns atrofasciatus (Herre, 1933) (Culion, Philippines); L. cyclophthalmus (Muller & Troschel, 1849) (Japan to northwestern Australia, Papua New Guinea); L. lineatus (Castelnau, 1875) (Western Australia); Manonichthvs a/leni sp. nov. (Sabah, Borneo); M. paranox (Lubbock & Goldman, 1976) (Solomon Ids, Papua New Guinea, Great Barrier Reef); M. polynemus (Fowler, 1931) (northeastern Indonesia, Belau); M. splendens (Fowler, 1931) (southeastern Indonesia); M. winterbottomi sp nov. (Cebu, Philippines); Ogilbyina novaehollandiae (Steindachner, 1880) (southern Great Barrier Reef and Queensland); O. queenslandiae (Saville-Kent, 1893) (Queensland, Great Barrier Reef); O. salvati (Plessis & Fourmanoir, 1966) (New Caledonia); Oxvcercichthys veliferus (Lubbock, 1980) (Great Barrier Reef, western Coral Sea); Pholidochromis marginata (Lubbock, 1980) (northeastern Indonesia to Bougainville); Pictichromis aurifrons (Lubbock, 1980) (New Guinea); P. coralensis sp. nov. (Great Barrier Reef to New Caledonia); P. diadema (Lubbock & Randall, 1978) (Malaysia to Philippines and northern Borneo); P. ephippiata (Gill, Pyle & Earle, 1996) (northern Sulawesi, southeastern Papua New Guinea); P. paccagnellae (Axelrod, 1973) (Indonesia, Timor Sea to Solomon Ids); P. porphyrea (Lubbock & Goldman, 1974) (Ryukyu Ids and northeastern Indonesia to Marshall Ids and Tonga); Pseudochromis aldabraensis Bauchot-Boutin, 1958 (Aldabra, northwestern Indian Ocean); P. alticaudex sp. nov. (northeastern Indonesia to Solomon Ids); P. andamanensis Lubbock, 1980 (Andaman Sea to Timor Sea, Australia); P. aureolineatus sp. nov. (Comoro Ids); P. aurulentus Gill & Randall, 1998 (Komodo Id, Indonesia); P. bitaeniatus (Fowler, 1931) (Philippines to Timor Sea, Australia, Solomon Ids); P. caudalis Boulenger, 1898 (Arabian Sea to Sri Lanka); P. coccinicauda (Tickell, 1888) (Laccadive Ids to central Indonesia); P. colei Herre, 1933 (Culion, Philippines); P. cometes Gill & Randall, 1998 (Komodo Id, Indonesia); P. cyanotaenia Bleeker, 1857 (Japan to Australia and Vanuatu); P dilectus Lubbock, 1976 (Sri Lanka); P. dixurus Lubbock, 1975 (Red Sea); P. dutoiti Smith, 1955 (east coast of Africa); P. elongatus Lubbock, 1980 (eastern Indonesia); P. flammicauda Lubbock & Goldman, 1976 (Great Barrier Reef); P. flavivertex Riippell, 1835 (Red Sea); P. flavopunctatus Gill & Randall, 1998 (Komodo Id, Indonesia); P. fowleri Herre, 1934 (Philippines and Sabah, Borneo); P. fridmani Klausewitz, 1968 (Red Sea); P. fuscus Muller & Troschel, 1849 (Sri Lanka to Vanuatu); P. howsoni Allen, 1995 (northwestern Australia); P. jamesi Schultz, 1943 (southwest Pacific); P kolythrus Gill & Winterbottom, 1993 (New Caledonia); P. kristinae sp. nov. (east coast of Africa to Madagascar); P. leucorhynchus Lubbock, 1977 (Kenya to Oman); P. linda Randall & Stanaland, 1989 (Gulf of Aden to Pakistan); P. litus Gill & Randall, 1998 (southeastern Indonesia); P. luteus Aoyagi, 1943 (Ryukyu Ids to Philippines); P. madagascariensis sp. nov. (northeastern Madagascar); P. magnificus Lubbock, 1977 (Cargados Carajos Shoals); P. marshallensis Schultz, 1953 (Western Australia to Marshall Ids); P. melanurus sp. nov. (Fiji and Tonga); P. melas Lubbock, 1977 (east coast of Africa); P. mooii sp. nov. (Komodo Id, Indonesia); P. moorei Fowler, 1931 (Philippines); P. natalensis Regan, 1916 (east coast of Africa); P. nigrovittatus Boulenger, 1897 (Red Sea, Gulf of Aden, Socotra to Persian Gulf); P- olivaceus Riippell, 1835 (Red Sea); P. omanensis Gill & Mee, 1993 (Oman); P. persicus Murray, 1887 (Persian Gulf to Pakistan); P. perspicillatus Gunther, 1862 (Philippines and Indonesia); P. pesi Lubbock, 1975 (Red Sea); P. pictus Gill & Randall, 1998 (Alor Id, Indonesia); P. punctatus Kotthaus, 1970 (Somalia and southern Oman); P. pylei Randall & McCosker, 1989 (southeastern Indonesia and Belau); P quinquedentatus McCulloch, 1926 (northern Australia); P. ransonneti Steindachner, 1870 (Gulf of Thailand to Seribu Ids, Indonesia); P. reticulatus Gill & Woodland, 1992 (northwestern Australia); P. sankeyi Lubbock, 1975 (southern Red Sea, Gulf of Aden); P. springeri Lubbock, 1975 (Red Sea); P. steenei Gill & Randall, 1992 (southern Indonesia); P. striatus Gill, Shao & Chen, 1995 (Philippines, Taiwan, Ryukyu Ids); P. tapeinosoma Bleeker, 1853 (Andaman Sea to Solomon Ids); P. tauberae Lubbock, 1977 (east coast of Africa to Madagascar); P. viridis Gill & Allen, 1996 (Christmas Id, Indian Ocean); and P. wilsoni Whitley, 1929 (northern Australia). A key to genera and keys to species within genera are provided. Synonymy lists, suggested vernacular names, morphological descriptions, habitat notes, and distribution maps are given for each species. Photographs showing live and/or freshly dead colourations (including sexual and other intraspecific variation) are provided for all but a few species.
- Full Text:
- Date Issued: 2004
Socio-economic differentiation in the trade of wildlife species for traditional medicines in the Lowveld, South Africa: Implications for resource management initiatives
- Botha, Jenny, Witkowski, Ed T F, Shackleton, Charlie M, Fairbanks, Dean H K
- Authors: Botha, Jenny , Witkowski, Ed T F , Shackleton, Charlie M , Fairbanks, Dean H K
- Date: 2004
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/183071 , vital:43909 , xlink:href="https://doi.org/10.1080/13504500409469832"
- Description: Surveys of trade in wildlife products utilised in traditional medicine were conducted between 1997 and 1999 on the western boundary of the Kruger National Park, South Africa. Although the extent of trade and numbers of people operating in this sector were lower than other regions of South Africa, this study again highlighted the value of indigenous wildlife products to subsistence economies. Apart from cultural diversity, socioeconomic differentiation occurred at a number of levels. (i) There were socio-economic differences between the traders and vendors. (ii) Gender differences were apparent, with women earning significantly less than men and having to undergo more social challenges in their operation in the market place. (iii) Operational differences were noted between the vendors and traders, as well as between the street and pension day vendors. (iv) Multidimensional Scaling (MDS) highlighted the socio-economic differentiation at the household level, emphasizing in particular one of the most vulnerable groups, the elderly. The potential influence of this socio-economic differentiation needs to be considered during the development of Community-Based Conservation programmes, if the dual aims of conserving biodiversity and improving the lives and livelihoods of those who traditionally rely on medicinal plants are to be met.
- Full Text:
- Date Issued: 2004
- Authors: Botha, Jenny , Witkowski, Ed T F , Shackleton, Charlie M , Fairbanks, Dean H K
- Date: 2004
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/183071 , vital:43909 , xlink:href="https://doi.org/10.1080/13504500409469832"
- Description: Surveys of trade in wildlife products utilised in traditional medicine were conducted between 1997 and 1999 on the western boundary of the Kruger National Park, South Africa. Although the extent of trade and numbers of people operating in this sector were lower than other regions of South Africa, this study again highlighted the value of indigenous wildlife products to subsistence economies. Apart from cultural diversity, socioeconomic differentiation occurred at a number of levels. (i) There were socio-economic differences between the traders and vendors. (ii) Gender differences were apparent, with women earning significantly less than men and having to undergo more social challenges in their operation in the market place. (iii) Operational differences were noted between the vendors and traders, as well as between the street and pension day vendors. (iv) Multidimensional Scaling (MDS) highlighted the socio-economic differentiation at the household level, emphasizing in particular one of the most vulnerable groups, the elderly. The potential influence of this socio-economic differentiation needs to be considered during the development of Community-Based Conservation programmes, if the dual aims of conserving biodiversity and improving the lives and livelihoods of those who traditionally rely on medicinal plants are to be met.
- Full Text:
- Date Issued: 2004
Environmental education research and social change: Southern African perspectives
- Authors: Lotz-Sisitka, Heila
- Date: 2004
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/182709 , vital:43855 , xlink:href="https://doi.org/10.1080/1350462042000258143"
- Description: Environmental issues and risks in southern Africa have, like elsewhere in the world, their roots in the structures and orientations of modern societies. In modernist fashion, we draw on education and research to address socio-ecological concerns. In 1995 Eureta Janse van Rensburg, then Murray and Roberts Chair of Environmental Education at Rhodes University,1 undertook a study to identify environmental education research priorities, and through her study she provided a description of research in environmental education as a ‘landscape of shifting priorites’ (Janse van Rensburg, 1995). The papers in this journal offer a contemporary ‘snapshot’ of the landscape of environmental education research in southern Africa, illustrating a fresh range of ‘shifting priorities’.
- Full Text:
- Date Issued: 2004
- Authors: Lotz-Sisitka, Heila
- Date: 2004
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/182709 , vital:43855 , xlink:href="https://doi.org/10.1080/1350462042000258143"
- Description: Environmental issues and risks in southern Africa have, like elsewhere in the world, their roots in the structures and orientations of modern societies. In modernist fashion, we draw on education and research to address socio-ecological concerns. In 1995 Eureta Janse van Rensburg, then Murray and Roberts Chair of Environmental Education at Rhodes University,1 undertook a study to identify environmental education research priorities, and through her study she provided a description of research in environmental education as a ‘landscape of shifting priorites’ (Janse van Rensburg, 1995). The papers in this journal offer a contemporary ‘snapshot’ of the landscape of environmental education research in southern Africa, illustrating a fresh range of ‘shifting priorities’.
- Full Text:
- Date Issued: 2004
An introduction: Peteni in context
- Authors: Wright, Laurence
- Date: 2004
- Language: English
- Type: text , article
- Identifier: vital:7036 , http://hdl.handle.net/10962/d1007372 , http://hdl.handle.net/10520/EJC47870
- Description: preprint , It is rare for a writer to make a literary impact with only one novel. It is even more unusual when that work is written by a novice author in his early sixties. Yet such is the case of R.L. Peteni, whose novel, Hill of Fools, was published by David Philip in South Africa in 1976, and internationally in the same year by Heinemann in the African Writers Series. Four years later, in 1980, the book was translated by the author into Xhosa as Kwazidenge and published by the Lovedale Press. Twenty years after initial publication, in 1996, there came a television version of Kwazidenge broadcast by the SABC, starring Willie Thambo and Amanda Quwe, though the locale was translated – in the bizarre logic of television – to an urban environment on the Cape Flats. The transposition, though pragmatic in terms of television demographics, destroyed much of the point of Peteni’s work, for Hill of Fools is South Africa’s first regional novel in English by a black writer. It is also the first novel in English by a Xhosa-speaker.
- Full Text:
- Date Issued: 2004
- Authors: Wright, Laurence
- Date: 2004
- Language: English
- Type: text , article
- Identifier: vital:7036 , http://hdl.handle.net/10962/d1007372 , http://hdl.handle.net/10520/EJC47870
- Description: preprint , It is rare for a writer to make a literary impact with only one novel. It is even more unusual when that work is written by a novice author in his early sixties. Yet such is the case of R.L. Peteni, whose novel, Hill of Fools, was published by David Philip in South Africa in 1976, and internationally in the same year by Heinemann in the African Writers Series. Four years later, in 1980, the book was translated by the author into Xhosa as Kwazidenge and published by the Lovedale Press. Twenty years after initial publication, in 1996, there came a television version of Kwazidenge broadcast by the SABC, starring Willie Thambo and Amanda Quwe, though the locale was translated – in the bizarre logic of television – to an urban environment on the Cape Flats. The transposition, though pragmatic in terms of television demographics, destroyed much of the point of Peteni’s work, for Hill of Fools is South Africa’s first regional novel in English by a black writer. It is also the first novel in English by a Xhosa-speaker.
- Full Text:
- Date Issued: 2004
Rhodes University Graduation Ceremony 2004
- Authors: Rhodes University
- Date: 2004
- Language: English
- Type: text
- Identifier: vital:8143 , http://hdl.handle.net/10962/d1007261
- Description: Rhodes University Graduation Ceremonies 1820 Settlers National Monument Friday, 2 April 2004 at 10:30; 14:30 & 18:00 [and] Saturday, 3 April 2004 at 10:30 [and] Friday, 30 July 2004 at 18:00 , RU East London Graduation Ceremony Christian Centre, Wyse Street, East London Friday, 7 May 2004 at 10:30: 14:30 & 18:00 [and] Saturday, 8 May 2004 at 10:30
- Full Text:
- Date Issued: 2004
- Authors: Rhodes University
- Date: 2004
- Language: English
- Type: text
- Identifier: vital:8143 , http://hdl.handle.net/10962/d1007261
- Description: Rhodes University Graduation Ceremonies 1820 Settlers National Monument Friday, 2 April 2004 at 10:30; 14:30 & 18:00 [and] Saturday, 3 April 2004 at 10:30 [and] Friday, 30 July 2004 at 18:00 , RU East London Graduation Ceremony Christian Centre, Wyse Street, East London Friday, 7 May 2004 at 10:30: 14:30 & 18:00 [and] Saturday, 8 May 2004 at 10:30
- Full Text:
- Date Issued: 2004
Sex work from a feminist perspective: a visit to the Jordan case
- Authors: Krüger, Rósaan
- Date: 2004
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/68877 , vital:29335 , https://doi.org/10.1080/19962126.2004.11864812
- Description: Publisher version , Introduction: Contributors to the prostitution/sex work debate, whether they condone, support or oppose criminalisation, legalisation or decriminalisation of prostitution, often rely on ‘facts’ to support their arguments. A common fact is that the majority of prostitutes/sex workers in the world and in South Africa are women. Thus, when I refer to prostitutes/sex workers, I refer to women working as prostitutes in the commercial sex industry. Furthermore, the fact that the majority of sex workers are women justifies considering prostitution from a feminist perspective – women’s voices on the subject should be heard. In this note I shall use the terms ‘prostitution’ and ‘sex work’ to refer to the exchange of sexual services for money. The former, more conventional term has a negative connotation, while the term ‘sex work’ denotes a movement away from casting a moral judgment towards recognition that sex work is just another job. References will be made to the associated activities of brothel-keeping and pimping, but the focus of this note is mainly on the provision of sexual services by the prostitute/ sex worker herself. Jordan v S is a Constitutional Court judgment in which the constitutional validity of the criminalisation of prostitution and its related activities were challenged. In order to analyse this judgment from a feminist perspective, I shall first briefly set out the current legal position on prostitution. Thereafter, I shall give an overview of Western feminist perspectives on prostitution and then link this perspective with African feminism. The last part of the note will be an analysis of the Jordan judgment in light of the feminist perspectives identified before.
- Full Text: false
- Date Issued: 2004
- Authors: Krüger, Rósaan
- Date: 2004
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/68877 , vital:29335 , https://doi.org/10.1080/19962126.2004.11864812
- Description: Publisher version , Introduction: Contributors to the prostitution/sex work debate, whether they condone, support or oppose criminalisation, legalisation or decriminalisation of prostitution, often rely on ‘facts’ to support their arguments. A common fact is that the majority of prostitutes/sex workers in the world and in South Africa are women. Thus, when I refer to prostitutes/sex workers, I refer to women working as prostitutes in the commercial sex industry. Furthermore, the fact that the majority of sex workers are women justifies considering prostitution from a feminist perspective – women’s voices on the subject should be heard. In this note I shall use the terms ‘prostitution’ and ‘sex work’ to refer to the exchange of sexual services for money. The former, more conventional term has a negative connotation, while the term ‘sex work’ denotes a movement away from casting a moral judgment towards recognition that sex work is just another job. References will be made to the associated activities of brothel-keeping and pimping, but the focus of this note is mainly on the provision of sexual services by the prostitute/ sex worker herself. Jordan v S is a Constitutional Court judgment in which the constitutional validity of the criminalisation of prostitution and its related activities were challenged. In order to analyse this judgment from a feminist perspective, I shall first briefly set out the current legal position on prostitution. Thereafter, I shall give an overview of Western feminist perspectives on prostitution and then link this perspective with African feminism. The last part of the note will be an analysis of the Jordan judgment in light of the feminist perspectives identified before.
- Full Text: false
- Date Issued: 2004
A fuzzy classification technique for predicting species' distributions: applications using invasive alien plants and indigenous insects
- Robertson, Mark P, Villet, Martin H, Palmer, Anthony R
- Authors: Robertson, Mark P , Villet, Martin H , Palmer, Anthony R
- Date: 2004
- Language: English
- Type: text , Article
- Identifier: vital:6897 , http://hdl.handle.net/10962/d1011659 , http://dx.doi.org/10.1111/j.1366-9516.2004.00108.x
- Description: A new predictive modelling technique called the fuzzy envelope model (FEM) is introduced. The technique can be used to predict potential distributions of organisms using presence-only locality records and a set of environmental predictor variables. FEM uses fuzzy logic to classify a set of predictor variable maps based on the values associated with presence records and combines the results to produce a potential distribution map for a target species. This technique represents several refinements of the envelope approach used in the BIOCLIM modelling package. These refinements are related to the way in which FEMs deal with uncertainty, the way in which this uncertainty is represented in the resultant potential distribution maps, and the way that these maps can be interpreted and applied. To illustrate its potential use in biogeographical studies, FEM was applied to predicting the potential distribution of three invasive alien plant species (Lantana camara L., Ricinus communis L. and Solanum mauritianum Scop.), and three native cicada species (Capicada decora Germar, Platypleura deusta Thun. and P. capensis L.) in South Africa, Lesotho and Swaziland. These models were quantitatively compared with models produced by means of the algorithm used in the BIOCLIM modelling package, which is referred to as a crisp envelope model (the CEM design). The average performance of models of the FEM design was consistently higher than those of the CEM design. There were significant differences in model performance among species but there was no significant interaction between model design and species. The average maximum kappa value ranged from 0.70 to 0.90 for FEM design and from 0.57 to 0.89 for the CEM design, which can be described as 'good' to 'excellent' using published ranges of agreement for the kappa statistic. This technique can be used to predict species' potential distributions that could be used for identifying regions at risk from invasion by alien species. These predictions could also be used in conservation planning in the case of native species.
- Full Text:
- Date Issued: 2004
- Authors: Robertson, Mark P , Villet, Martin H , Palmer, Anthony R
- Date: 2004
- Language: English
- Type: text , Article
- Identifier: vital:6897 , http://hdl.handle.net/10962/d1011659 , http://dx.doi.org/10.1111/j.1366-9516.2004.00108.x
- Description: A new predictive modelling technique called the fuzzy envelope model (FEM) is introduced. The technique can be used to predict potential distributions of organisms using presence-only locality records and a set of environmental predictor variables. FEM uses fuzzy logic to classify a set of predictor variable maps based on the values associated with presence records and combines the results to produce a potential distribution map for a target species. This technique represents several refinements of the envelope approach used in the BIOCLIM modelling package. These refinements are related to the way in which FEMs deal with uncertainty, the way in which this uncertainty is represented in the resultant potential distribution maps, and the way that these maps can be interpreted and applied. To illustrate its potential use in biogeographical studies, FEM was applied to predicting the potential distribution of three invasive alien plant species (Lantana camara L., Ricinus communis L. and Solanum mauritianum Scop.), and three native cicada species (Capicada decora Germar, Platypleura deusta Thun. and P. capensis L.) in South Africa, Lesotho and Swaziland. These models were quantitatively compared with models produced by means of the algorithm used in the BIOCLIM modelling package, which is referred to as a crisp envelope model (the CEM design). The average performance of models of the FEM design was consistently higher than those of the CEM design. There were significant differences in model performance among species but there was no significant interaction between model design and species. The average maximum kappa value ranged from 0.70 to 0.90 for FEM design and from 0.57 to 0.89 for the CEM design, which can be described as 'good' to 'excellent' using published ranges of agreement for the kappa statistic. This technique can be used to predict species' potential distributions that could be used for identifying regions at risk from invasion by alien species. These predictions could also be used in conservation planning in the case of native species.
- Full Text:
- Date Issued: 2004
Three decades of hydrological modelling research in South Africa
- Authors: Hughes, Denis A
- Date: 2004
- Language: English
- Type: text , Article
- Identifier: vital:7072 , http://hdl.handle.net/10962/d1009526
- Description: This paper presents a review of the research undertaken in the field of hydrological modelling over roughly the last three decades, concentrating primarily on South African work in an international context. The focus is on deterministic, rainfall-runoff models and addresses issues related to model design as well as to the application of models in practice. I provide a brief description of what hydrological models are and what they are used for and discuss also the following issues: • Developments in understanding hydrological process and the extent to which these have filtered down into models. • Model calibration and parameter estimation. • Trends in data availability and how these have affected model development. • Trends in computer technology and their impacts on model development. I suggest that there have been substantial developments in the science and practice of hydrological modelling, but that there remain many problems that need to be addressed to improve the ability of models to contribute to the solution of problems of water resource management. Southern African scientists have contributed to the body of knowledge on hydrological modelling, despite the limited resources available compared to resources elsewhere. Internationally, the focus has not always been on the practical issues of model application and has commonly tended towards the more theoretical and mathematical issues of model calibration. This is not a trend that has found much favour in southern Africa (particularly amongst research funding agencies), where there are many problems of water resource management that have the potential to be resolved with existing models, applied in an appropriate way. The paper concludes by suggesting that further research needs to focus on the integration of the best in international developments with the tried and tested models that have been developed locally. The context of this research should be the search for more reliable estimations of water resource availability.
- Full Text:
- Date Issued: 2004
- Authors: Hughes, Denis A
- Date: 2004
- Language: English
- Type: text , Article
- Identifier: vital:7072 , http://hdl.handle.net/10962/d1009526
- Description: This paper presents a review of the research undertaken in the field of hydrological modelling over roughly the last three decades, concentrating primarily on South African work in an international context. The focus is on deterministic, rainfall-runoff models and addresses issues related to model design as well as to the application of models in practice. I provide a brief description of what hydrological models are and what they are used for and discuss also the following issues: • Developments in understanding hydrological process and the extent to which these have filtered down into models. • Model calibration and parameter estimation. • Trends in data availability and how these have affected model development. • Trends in computer technology and their impacts on model development. I suggest that there have been substantial developments in the science and practice of hydrological modelling, but that there remain many problems that need to be addressed to improve the ability of models to contribute to the solution of problems of water resource management. Southern African scientists have contributed to the body of knowledge on hydrological modelling, despite the limited resources available compared to resources elsewhere. Internationally, the focus has not always been on the practical issues of model application and has commonly tended towards the more theoretical and mathematical issues of model calibration. This is not a trend that has found much favour in southern Africa (particularly amongst research funding agencies), where there are many problems of water resource management that have the potential to be resolved with existing models, applied in an appropriate way. The paper concludes by suggesting that further research needs to focus on the integration of the best in international developments with the tried and tested models that have been developed locally. The context of this research should be the search for more reliable estimations of water resource availability.
- Full Text:
- Date Issued: 2004
Reviewing review:
- Authors: Garman, Anthea
- Date: 2004
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/158773 , vital:40227 , https://hdl.handle.net/10520/EJC146216
- Description: In this 10th year of freedom of media in South Africa, the Rhodes Journalism Review has entered its 14th year as chronicler of media in South Africa. RJR was started in the year that actually unrolled the changes we now live with - 1990 - and attempted to document the complex journey out of apartheid. In the last 10 years Review has been charting the even more complex journey into freedom.
- Full Text:
- Date Issued: 2004
- Authors: Garman, Anthea
- Date: 2004
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/158773 , vital:40227 , https://hdl.handle.net/10520/EJC146216
- Description: In this 10th year of freedom of media in South Africa, the Rhodes Journalism Review has entered its 14th year as chronicler of media in South Africa. RJR was started in the year that actually unrolled the changes we now live with - 1990 - and attempted to document the complex journey out of apartheid. In the last 10 years Review has been charting the even more complex journey into freedom.
- Full Text:
- Date Issued: 2004