Karyology of the redfin minnows, genus Pseudobarbus Smith, 1841 (Teleostei: Cyprinidae): one of the evolutionarily tetraploid lineages of South African barbines
- Authors: Naran, D , Skelton, Paul H (Paul Harvey) , Villet, M H (Martin Herrer)
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:6770 , http://hdl.handle.net/10962/d1008063
- Description: The karyotypes of six species of Pseudobarbus Smith, 1841, namely P. afer (Peters, 1864), P. asper (Boulenger, 1911), P. burchelli Smith, 1841, P. burgi (Boulenger, 1911), P. phlegethon (Barnard, 1938) and P. tenuis (Barnard, 1938), were examined by conventional Giemsa staining and described. All six karyotypes have 2n = 100 chromosomes, dominated by biarmed chromosomes, as does the only other member of the genus, P. quathlambae (Barnard, 1938). Sex-related intraspecific karyotype variation was not found. The shared chromosome numbers and general similarity of the karyotypes (FN = 186–192) provide a new synapomorphy to support their monophyly, which is already indicated by anatomical and mtDNA markers. Karyotype evolution within the genus has been accompanied by chromosomal inversions and centromeric shifts. Comparison of the diploid number found in Pseudobarbus with other African barbine cyprinines, which have in the region of 2n=50 and lower FNs, suggests a tetraploid evolutionary origin of the genus, possibly by allotetraploidy.
- Full Text:
- Date Issued: 2006
An African heritage of fishes : inaugural lecture delivered at Rhodes University
- Authors: Skelton, Paul H (Paul Harvey)
- Date: 1997
- Subjects: Fishes -- South Africa , Fishes -- Nomenclature (Popular) , Ichthyology -- South Africa
- Language: English
- Type: Text
- Identifier: vital:668 , http://hdl.handle.net/10962/d1020737 , ISBN 0868103284
- Description: Inaugural lecture delivered at Rhodes University , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1997
Reproductive and feeding biology of the Natal mountain catfish, Amphilius natalensis (Siluriformes: Amphiliidae)
- Authors: Marriott, Michael S , Booth, Anthony J , Skelton, Paul H (Paul Harvey)
- Date: 1997
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/125837 , vital:35823 , https://doi.10.1023/A:1007361511052
- Description: The family Amphiliidae comprises nine genera and about 60 species. Only five species are found in southern Africa, three of which belong to the genus Amphilius (Skelton 1993). These soft-bodied catlets inhabit clear, fast flowing mountain streams where they live amongst cobbles, feeding predominantly on benthic invertebrates (Crass 1964, Skelton 1993). The Natal mountain catfish, A. natalensis Boulenger, 1917, is a small, nocturnal species with a restricted distribution along the eastern seaboard of southern Africa. It occurs in mountain streams from the Umkomaas River north to the Limpopo system in South Africa. It is also present in the Marozi River, a tributary of the Zambezi River in Zimbabwe and in the Ruo River, Malawi (Skelton 1984, 1993). Skelton (1993) suggested that predation by introduced trout species has led to scarcity of A. natalensis in many streams. In spite of this, no studies on the biology of this catfish species have been published. This study presents the first quantitative information on the biology of an amphiliid catfish, A. natalensis including gametogenesis, spawning seasonality, size-at-maturity, adult sex ratio and diet.
- Full Text:
- Date Issued: 1997
Fifty years of ichthyology in Grahamstown
- Authors: Skelton, Paul H (Paul Harvey)
- Date: 1996
- Language: English
- Type: text , Article
- Identifier: vital:7138 , http://hdl.handle.net/10962/d1011816
- Description: In July 1946, the fledgling Council for Scientific and Industrial Research (CSIR) awarded Dr J.L.B. (James Leonard Brierley) Smith of Rhodes University College a research fellowship of £800 to enable him to devote his energies to ichthyology. The university responded by providing accommodation, equipment and appointing Smith a research professor. These actions marked the beginning of what has become a major academic development in Grahamstown as represented by the J.L.B. Smith Institute of Ichthyology, the Department of Ichthyology and Fisheries Science (DIFS), and the Freshwater Fish Section at the Albany Museum. At present more than 40 people are employed in one way or other in these organizations, more than 20 of them professionals, in addition to whom there are 41 postgraduate students currently studying ichthyology or fisheries science through DIFS at Rhodes University. Altogether this represents a concentration of ichthyological expertise probably unmatched anywhere else in the world. It is opportune therefore to highlight a few of the more significant milestones in the history of ichthyology in Grahamstown and so illuminate some of the key factors behind this achievement.
- Full Text:
- Date Issued: 1996
Scientific and common names of southern African freshwater fishes
- Authors: Skelton, Paul H (Paul Harvey) , J.L.B. Smith Institute of Ichthyology
- Date: 1993-11
- Subjects: Freshwater fishes -- Africa, Southern -- Nomenclature , Freshwater fishes -- Africa, Southern -- Nomenclature (Popular) , Fishes -- Africa, Southern -- Nomenclature , Fishes -- Africa, Southern -- Nomenclature (Popular)
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/70946 , vital:29765 , Margaret Smith Library (South African Institute for Aquatic Biodiversity (SAIAB)) Periodicals Margaret Smith Library (South African Institute for Aquatic Biodiversity (SAIAB))
- Description: Online version of original print edition of the Special Publication of the J.L.B. Smith Institute of Ichthyology; No. 56 , A list of the scientific and recommended English and Afrikaans common names of fishes found in freshwater habitats of southern Africa is presented. Notes explaining the additions and changes made to the list of Jackson (1975) are provided. The list includes 259 species of which 201 (78%) are indigenous primary and secondary freshwater fishes, 34 (13%) are of marine origin and 4 (2%) are diadromous. Twenty alien species (8%) are also included. The number of species has increased by 47 (22%). Of these 47 species, 32 are strictly freshwater fishes and 15 are marine species. Two new alien species are added to the list.
- Full Text:
- Date Issued: 1993-11
Neotype description for the African catfish Clarias Gariepinus (Burchell, 1822) (Pisces: Siluroidei: Clariidae)
- Authors: Skelton, Paul H (Paul Harvey) , Teugels, Guy G
- Date: 1992
- Subjects: Catfishes -- Africa , Clariidae -- Africa
- Language: English
- Type: Text
- Identifier: vital:14995 , http://hdl.handle.net/10962/d1019675 , ISBN 0-86810-231-8 , Ichthyological Bulletin of the J.L.B. Smith Institute of Ichthyology; No. 56
- Description: A neotype for Clarias gariepinus (Burchell, 1822) is designated and described. Data from 41 specimens from the type locality are also presented. The geographical distribution of the species is discussed. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1992
Descriptions of two new species of West African amphiliid catfishes (Siluroidei: Amphiliidae)
- Authors: Skelton, Paul H (Paul Harvey) , J.L.B. Smith Institute of Ichthyology
- Date: 1989-08
- Subjects: Catfishes , Siluridae , Fishes -- South Africa
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/70324 , vital:29645 , Margaret Smith Library (South African Institute for Aquatic Biodiversity (SAIAB)) Periodicals Margaret Smith Library (South African Institute for Aquatic Biodiversity (SAIAB))
- Description: Online version of original print edition of the Special Publication of the J.L.B. Smith Institute of Ichthyology; No. 48 , Two new amphiliid catfish species from west Africa are described. A new Paramphilius from the Little Scarcies River basin in Guinea, is the third species of the genus from that area. It has a relatively deeper body and longer fins than other upper Guinean Paramphilius species. The new species of Doumea from the Cross River in Nigeria and Cameroons is characterised by a long predorsal length and a relatively short stout caudal peduncle.
- Full Text:
- Date Issued: 1989-08
The fishes of the Okavango drainage system in Angola, South West Africa and Botswana: taxonomy and distribution
- Authors: Skelton, Paul H (Paul Harvey) , Bruton, M N , Merron, G S , Van der Waal, C W
- Date: 1985
- Language: English
- Type: Text
- Identifier: vital:15009 , http://hdl.handle.net/10962/d1019742 , ISSN 0073-4381 , Ichthyological Bulletin of the J.L.B. Smith Institute of Ichthyology; No. 50
- Description: The publication of a new phase of research on the fishes of the Okavango drainage starts with this account which gives the valid names and broad distribution patterns of all species known from the system. Eighty species and subspecies are recognised, of which at least two (Parakneria fortuita Penrith; Serranochromis gracilis Greenwood) are endemic. Notes on early collections, synonymy, taxonomic status and distribution are given. New synonyms are recognized under Aplocheilichthys hutereaui (A. schalleri), Aplocheilichthys johnstoni (Haplochilus carlislei) and Ctenopoma multispinis (Ctenopoma machadoi) respectively. Recently published taxonomic changes are incorporated including two genera (Mesobola and Afromastacembelus), a species Serranochromis (Sargochromis) gracilis and the re-allocated Amphilius uranoscopus. The Zambezian Hemichromis species is re-identified as H. elongatus. A number of unresolved taxonomic problems are pointed out and certain dubious records are excluded from the checklist. The Okavango has a diverse fish fauna with tropical affinities. Many fish species are poorly studied. Man-induced threats to the continued natural functioning of this complex and dynamic system, especially large-scale water abstraction, overgrazing, deforestation and biocide spraying to eliminate tsetse fly, make it imperative that studies on the nature and role of the fishes are continued. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1985
Fishes of the Sak River, South Africa: with comments on the nomenclature of the smallmouth yellowfish, Barbus aeneus (Burchell, 1822)
- Authors: Hocutt, Charles H , Skelton, Paul H (Paul Harvey) , J.L.B. Smith Institute of Ichthyology
- Date: 1983-12
- Subjects: Fishes -- South Africa -- Sak River , Fishes -- South Africa -- Nomenclature , Barbus aeneus
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/70039 , vital:29609 , Margaret Smith Library (South African Institute for Aquatic Biodiversity (SAIAB)) Periodicals Margaret Smith Library (South African Institute for Aquatic Biodiversity (SAIAB))
- Description: Online version of original print edition of the Special Publication of the J.L.B. Smith Institute of Ichthyology; No. 32 , Fishes were collected from 30 localities in the Sak River system, South Africa. Six species are known from the drainage, including two exotics. New distributional data were collected for Barbus aeneus, Barbus anoplus and Labeo umbratus. Additionally, the exotics Cyprinus carpio and Carassius auratus were added to the ichthyofauna known from the drainage. An annotated list of species either collected or historically known from the drainage is presented. Barbus aeneus (Burchell, 1822) is recognized as the valid name for the smallmouth yellowfish and a senior synonym of Barbus holubi Steindachner, 1894.
- Full Text:
- Date Issued: 1983-12
A new Barbus species (Pisces, Cyprinidae) from the Olifants River System, Western Cape Province, South Africa
- Authors: Skelton, Paul H (Paul Harvey) , Rhodes University. J.L.B. Smith Institute of Ichthyology
- Date: 1974-08
- Subjects: Barbus erubescens , Freshwater fishes -- South Africa -- Olifants River (Clanwilliam District, Cape of Good Hope)
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/69715 , vital:29570 , Margaret Smith Library (South African Institute for Aquatic Biodiversity (SAIAB)) Periodicals Margaret Smith Library (South African Institute for Aquatic Biodiversity (SAIAB))
- Description: Online version of original print edition of the Special Publication of the J.L.B. Smith Institute of Ichthyology; No. 13 , A new species of small Barbus is described from the Olifants River System, western Cape Province, South Africa. The new species is restricted to a single tributary complex of the river system and appears closely related to B. calidus. Diagnostic features include pharyngeal teeth formulae, colour pattern, and dorsal and anal fin ray characteristics.
- Full Text:
- Date Issued: 1974-08