Reproductive and feeding biology of the Natal mountain catfish, Amphilius natalensis (Siluriformes: Amphiliidae)
- Marriott, Michael S, Booth, Anthony J, Skelton, Paul H (Paul Harvey)
- 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
- 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
- Skelton, Paul H (Paul Harvey)
- 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
- 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
- Skelton, Paul H (Paul Harvey), J.L.B. Smith Institute of Ichthyology
- 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
- 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
Descriptions of two new species of West African amphiliid catfishes (Siluroidei: Amphiliidae)
- Skelton, Paul H (Paul Harvey), J.L.B. Smith Institute of Ichthyology
- 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
- 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
Fishes of the Sak River, South Africa: with comments on the nomenclature of the smallmouth yellowfish, Barbus aeneus (Burchell, 1822)
- Hocutt, Charles H, Skelton, Paul H (Paul Harvey), J.L.B. Smith Institute of Ichthyology
- 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
- 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
- Skelton, Paul H (Paul Harvey), Rhodes University. J.L.B. Smith Institute of Ichthyology
- 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
- 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
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