Additions to the fish fauna of the Maldives Islands
- Adam, Shiham, Merrett, Nigel R, Anderson, R Charles, Randall, John E, 1924-, Kuiter, Rudie H
- Authors: Adam, Shiham , Merrett, Nigel R , Anderson, R Charles , Randall, John E, 1924- , Kuiter, Rudie H
- Date: 1998
- Language: English
- Type: Text
- Identifier: vital:15030 , http://hdl.handle.net/10962/d1019905 , ISSN 0073-4381 , Ichthyological Bulletin of the J.L.B. Smith Institute of Ichthyology; No. 67
- Description: Part 1: We report here information on the occurrence of the deep demersal fish species known to date from the Maldivian Exclusive Economic Zone below a depth of 180 m. Collections of Maldivian deep demersal fishes are held by The Natural History Museum, London (BMNH); the Bernice P. Bishop Museum, Honolulu; the Field Museum of Natural History, Chicago; the Marine Research Section, Ministry of Fisheries and Agriculture, Male, Republic of Maldives; the South African Museum, Cape Town; and the Zoological Survey of India, at the Indian Museum, Calcutta. Specimens from all of these institutions have been studied by the authors. In addition, the authors carried out sampling of the slope shark fishery during March - April 1996, which resulted in a significant new collection of shark material. A total of 99 deep demersal species are reported here which includes 36 new records for the Maldives. The six most speciose families are the Macrouridae (7 species), Congridae (5), Lutjanidae (5), Squalidae (4), Ogocephalidae (4) and Halosauridae (4). , Part 2: Seventy-eight fish species are recorded from the Maldives for the first time. A further 30, which have been recorded in the literature but not included in previous reviews of Maldivian fishes, are listed. The total known shore and epipelagic fish fauna of the Maldives now stands at 1007 species. The total known demersal and epipelagic fish fauna is raised to 1090. , Rhodes University Libraries (Digitisation)
- Full Text:
- Authors: Adam, Shiham , Merrett, Nigel R , Anderson, R Charles , Randall, John E, 1924- , Kuiter, Rudie H
- Date: 1998
- Language: English
- Type: Text
- Identifier: vital:15030 , http://hdl.handle.net/10962/d1019905 , ISSN 0073-4381 , Ichthyological Bulletin of the J.L.B. Smith Institute of Ichthyology; No. 67
- Description: Part 1: We report here information on the occurrence of the deep demersal fish species known to date from the Maldivian Exclusive Economic Zone below a depth of 180 m. Collections of Maldivian deep demersal fishes are held by The Natural History Museum, London (BMNH); the Bernice P. Bishop Museum, Honolulu; the Field Museum of Natural History, Chicago; the Marine Research Section, Ministry of Fisheries and Agriculture, Male, Republic of Maldives; the South African Museum, Cape Town; and the Zoological Survey of India, at the Indian Museum, Calcutta. Specimens from all of these institutions have been studied by the authors. In addition, the authors carried out sampling of the slope shark fishery during March - April 1996, which resulted in a significant new collection of shark material. A total of 99 deep demersal species are reported here which includes 36 new records for the Maldives. The six most speciose families are the Macrouridae (7 species), Congridae (5), Lutjanidae (5), Squalidae (4), Ogocephalidae (4) and Halosauridae (4). , Part 2: Seventy-eight fish species are recorded from the Maldives for the first time. A further 30, which have been recorded in the literature but not included in previous reviews of Maldivian fishes, are listed. The total known shore and epipelagic fish fauna of the Maldives now stands at 1007 species. The total known demersal and epipelagic fish fauna is raised to 1090. , Rhodes University Libraries (Digitisation)
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Systematics and Osteology of the Zoarcidae (Teleostei: Perciformes)
- Authors: Anderson, M Eric
- Date: 1994
- Language: English
- Type: Text
- Identifier: vital:15033 , http://hdl.handle.net/10962/d1019910 , ISSN 0073-4381 , Ichthyological Bulletin of the J.L.B. Smith Institute of Ichthyology; No. 60
- Description: The eelpouts, Zoarcidae, are a group of perciform fishes, most species of which inhabit continental shelves and slopes of boreal seas. There are about 220 valid species of eelpouts; most are rare, deep-sea forms and the systematics and biology of the group has been neglected by most workers. This work is a contribution to the improvement of that state. The anatomy of the Zoarcidae was studied in an attempt to reconstruct phylogeny and establish generic limits. From an analysis of a matrix of 76 characters, the 45 genera recognised here form 4 subfamilies. The Lycozoarcinae contains only the primitive Lycozoarces hubbsi. The others, Zoarcinae, Gymnelinae, and Lycodinae, for the most part, include genera recognised in previous classifications (Gill, 1862, 1864; Andriashev, 1939). The more primitive zoarcids are characterised by having 4-6 suborbital bones arranged in a circular pattern close to the orbit, and “complete” cephalic lateralis pore patterns, except some of the few deep-sea forms. The more derived zoarcids are characterized by having 6-11 suborbital bones arranged in an angled, or “L”-shaped" pattern away from the orbit (except a few which have lost some bones) and the loss of the interorbital pores (except for some reversals in Lycenchelys and Lycodapus). Zoarcids are considered to have originated in the North Pacific Ocean, perhaps as early as the Eocene, when a pre-percoid radiation occurred. The suborder Zoarcoidei (today some 8-9 families) spread across the Pacific rim. Among Zoarcidae, a pre-Miocene radiation took place along the western coasts of the Americas, with areas of endemism forming in the Magellan Province of South America and Antarctica. Subsequent spreading back into northern waters occurred in Melanostigma and Pachycara. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1994
- Authors: Anderson, M Eric
- Date: 1994
- Language: English
- Type: Text
- Identifier: vital:15033 , http://hdl.handle.net/10962/d1019910 , ISSN 0073-4381 , Ichthyological Bulletin of the J.L.B. Smith Institute of Ichthyology; No. 60
- Description: The eelpouts, Zoarcidae, are a group of perciform fishes, most species of which inhabit continental shelves and slopes of boreal seas. There are about 220 valid species of eelpouts; most are rare, deep-sea forms and the systematics and biology of the group has been neglected by most workers. This work is a contribution to the improvement of that state. The anatomy of the Zoarcidae was studied in an attempt to reconstruct phylogeny and establish generic limits. From an analysis of a matrix of 76 characters, the 45 genera recognised here form 4 subfamilies. The Lycozoarcinae contains only the primitive Lycozoarces hubbsi. The others, Zoarcinae, Gymnelinae, and Lycodinae, for the most part, include genera recognised in previous classifications (Gill, 1862, 1864; Andriashev, 1939). The more primitive zoarcids are characterised by having 4-6 suborbital bones arranged in a circular pattern close to the orbit, and “complete” cephalic lateralis pore patterns, except some of the few deep-sea forms. The more derived zoarcids are characterized by having 6-11 suborbital bones arranged in an angled, or “L”-shaped" pattern away from the orbit (except a few which have lost some bones) and the loss of the interorbital pores (except for some reversals in Lycenchelys and Lycodapus). Zoarcids are considered to have originated in the North Pacific Ocean, perhaps as early as the Eocene, when a pre-percoid radiation occurred. The suborder Zoarcoidei (today some 8-9 families) spread across the Pacific rim. Among Zoarcidae, a pre-Miocene radiation took place along the western coasts of the Americas, with areas of endemism forming in the Magellan Province of South America and Antarctica. Subsequent spreading back into northern waters occurred in Melanostigma and Pachycara. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1994
Review of the deep-sea anglerfishes (Lophiiformes: Ceratioidei) of southern Africa
- Anderson, M Eric, Leslie, Robin W
- Authors: Anderson, M Eric , Leslie, Robin W
- Date: 2001
- Language: English
- Type: Text
- Identifier: vital:15029 , http://hdl.handle.net/10962/d1019903 , ISSN 0073-4381 , Ichthyological Bulletin of the J.L.B. Smith Institute of Ichthyology; No. 70
- Description: Deep-sea anglerfishes (Lophiiformes, Ceratioidei) of the familes Caulophrynidae, Melanocetidae, Himantolophidae, Diceratiidae, Oneirodidae, Thaumatichthyidae, Centrophrynidae, Ceratiidae, Gigantactinidae and Linophrynidae from southern Africa are reviewed since the publication of the book Smiths’ Sea Fishes (1986, 1991). Twenty-three new records of ceratioid anglerfishes are reported for the region, bringing the total to 32. No new taxa are described. The faunal area for southern African deep-sea fishes is expanded from that of Smiths’ Sea Fishes in order to include several literature records and recognize the broad distributions of these fishes through the deep-pelagic Atlantic/Indo-Pacific transit zone. Keys to all families, genera and species, as well as descriptions of all southern African specimens, are provided. The bulk of this material was collected during research cruises of South Africa’s RS AFRICANA and MEIRING NAUDE. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 2001
- Authors: Anderson, M Eric , Leslie, Robin W
- Date: 2001
- Language: English
- Type: Text
- Identifier: vital:15029 , http://hdl.handle.net/10962/d1019903 , ISSN 0073-4381 , Ichthyological Bulletin of the J.L.B. Smith Institute of Ichthyology; No. 70
- Description: Deep-sea anglerfishes (Lophiiformes, Ceratioidei) of the familes Caulophrynidae, Melanocetidae, Himantolophidae, Diceratiidae, Oneirodidae, Thaumatichthyidae, Centrophrynidae, Ceratiidae, Gigantactinidae and Linophrynidae from southern Africa are reviewed since the publication of the book Smiths’ Sea Fishes (1986, 1991). Twenty-three new records of ceratioid anglerfishes are reported for the region, bringing the total to 32. No new taxa are described. The faunal area for southern African deep-sea fishes is expanded from that of Smiths’ Sea Fishes in order to include several literature records and recognize the broad distributions of these fishes through the deep-pelagic Atlantic/Indo-Pacific transit zone. Keys to all families, genera and species, as well as descriptions of all southern African specimens, are provided. The bulk of this material was collected during research cruises of South Africa’s RS AFRICANA and MEIRING NAUDE. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 2001
Studies on the Zoarcidae (Teleostei: Perciformes) of the Southern Hemisphere IV. New records and a new species from the Magellan Province of South America
- Anderson, M Eric, Gosztonyi, Atila E
- Authors: Anderson, M Eric , Gosztonyi, Atila E
- Date: 1991
- Language: English
- Type: Text
- Identifier: vital:14999 , http://hdl.handle.net/10962/d1019708 , ISSN 0073-4381 , Ichthyological Bulletin of the J.L.B. Smith Institute of Ichthyology; No. 55
- Description: New data on the eelpouts of the Magellan Province of South America are presented to include accounts of 10 of the 25 species presently known from the area. Aiakas zini, a second species for Aiakas Gosztonyi, 1977, is described as new. On the basis of material collected since the authors last published on the eelpouts of this region (1977 and 1988), enhanced descriptions are provided for Aiakas kreffti, Crossostomus chilensis, Lycenchelys bachmanni, Notolycodes schmidti, Oidiphoms brevis, Ophthalmolycus macrops and Pogonolycus marinae. Placed in synonymy are Crossostomus sobrali Lloris and Rucabado, 1987 with C. chilensis Regan, 1913, Iluocoetes facali Lloris and Rucabado, 1987 with I.fim- briatus Jenyns, 1842 and Haushia Lloris, 1988 with Pogonolycus Norman, 1937. Shorter accounts are provided for data from new specimens of Lycodonus malvinensis and Piedrabuenia ringueleti. A key to all of the species of Zoarcidae from the Magellan Province is included. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1991
- Authors: Anderson, M Eric , Gosztonyi, Atila E
- Date: 1991
- Language: English
- Type: Text
- Identifier: vital:14999 , http://hdl.handle.net/10962/d1019708 , ISSN 0073-4381 , Ichthyological Bulletin of the J.L.B. Smith Institute of Ichthyology; No. 55
- Description: New data on the eelpouts of the Magellan Province of South America are presented to include accounts of 10 of the 25 species presently known from the area. Aiakas zini, a second species for Aiakas Gosztonyi, 1977, is described as new. On the basis of material collected since the authors last published on the eelpouts of this region (1977 and 1988), enhanced descriptions are provided for Aiakas kreffti, Crossostomus chilensis, Lycenchelys bachmanni, Notolycodes schmidti, Oidiphoms brevis, Ophthalmolycus macrops and Pogonolycus marinae. Placed in synonymy are Crossostomus sobrali Lloris and Rucabado, 1987 with C. chilensis Regan, 1913, Iluocoetes facali Lloris and Rucabado, 1987 with I.fim- briatus Jenyns, 1842 and Haushia Lloris, 1988 with Pogonolycus Norman, 1937. Shorter accounts are provided for data from new specimens of Lycodonus malvinensis and Piedrabuenia ringueleti. A key to all of the species of Zoarcidae from the Magellan Province is included. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1991
Fishes of the Tristan da Cunha Group and Gough Island, South Atlantic Ocean
- Andrew, T G, Hecht, Thomas, Heemstra, Phillip C, Lutjeharms, J R E
- Authors: Andrew, T G , Hecht, Thomas , Heemstra, Phillip C , Lutjeharms, J R E
- Date: 1995
- Language: English
- Type: Text
- Identifier: vital:15025 , http://hdl.handle.net/10962/d1019889 , ISSN 0073-4381 , Ichthyological Bulletin J.L.B. Smith Institute of Ichthyology; No. 63
- Description: Recent collections of fishes from the South Atlantic islands of the Tristan da Cunha Group (Tristan, Inaccessible and Nightingale) and Gough Island have produced 25 new records. Fifty one species are known to occur in the near-shore waters of the islands (46 of these are documented by specimens and another 5 species are probable). A diagnosis, synonymy and in most cases, an illustration, are provided for each species. For certain species, brief notes on biology, relative abundance and seasonal distribution are included. The neritic ichthyofauna of the Subtropical Convergence (STC) region is characterized, and the importance of this frontal zone as a barrier to dispersal of species in the Southern Ocean is evaluated. Analysis of the zoogeographic affinities of the Tristan/Gough fish fauna resulted in a redefinition of the West Wind Drift Islands Province (WWDI), comprising the Tristan Group and Gough in the South Atlantic and St. Paul and Amsterdam Islands in the southern Indian Ocean. Verna Seamount (west of Cape Town) and Walters Shoal (south of Madagascar) are excluded from the WWDI Province, as the affinities of their poorly-known fish faunas appear to be more with South Africa and the tropical Indian Ocean respectively. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1995
- Authors: Andrew, T G , Hecht, Thomas , Heemstra, Phillip C , Lutjeharms, J R E
- Date: 1995
- Language: English
- Type: Text
- Identifier: vital:15025 , http://hdl.handle.net/10962/d1019889 , ISSN 0073-4381 , Ichthyological Bulletin J.L.B. Smith Institute of Ichthyology; No. 63
- Description: Recent collections of fishes from the South Atlantic islands of the Tristan da Cunha Group (Tristan, Inaccessible and Nightingale) and Gough Island have produced 25 new records. Fifty one species are known to occur in the near-shore waters of the islands (46 of these are documented by specimens and another 5 species are probable). A diagnosis, synonymy and in most cases, an illustration, are provided for each species. For certain species, brief notes on biology, relative abundance and seasonal distribution are included. The neritic ichthyofauna of the Subtropical Convergence (STC) region is characterized, and the importance of this frontal zone as a barrier to dispersal of species in the Southern Ocean is evaluated. Analysis of the zoogeographic affinities of the Tristan/Gough fish fauna resulted in a redefinition of the West Wind Drift Islands Province (WWDI), comprising the Tristan Group and Gough in the South Atlantic and St. Paul and Amsterdam Islands in the southern Indian Ocean. Verna Seamount (west of Cape Town) and Walters Shoal (south of Madagascar) are excluded from the WWDI Province, as the affinities of their poorly-known fish faunas appear to be more with South Africa and the tropical Indian Ocean respectively. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1995
Fishes of the family Mullidae in the Red Sea, with a key to the species in the Red Sea and the Eastern Mediterranean
- Ben-Tuvia, Adam, Kissil, Geerge Wm
- Authors: Ben-Tuvia, Adam , Kissil, Geerge Wm
- Date: 1988
- Subjects: Mullidae -- Red Sea , Mullidae -- Mediterranean Sea
- Language: English
- Type: Text
- Identifier: vital:15011 , http://hdl.handle.net/10962/d1019744 , ISSN 0073-4381 , ISBN 0-86810-175-3 , Ichthyological Bulletin of the J.L.B. Smith Institute of Ichthyology; No. 52
- Description: Thirteen species of Mullidae (goatfishes or red mullets) occur in the Red Sea: Mulloides flavolineatus, M. vanicolensis, Parupeneus cyclostomus, P. forsskali, P. heptacanthus, P. macronemus, P. rubescens, Upeneus asymmetricus, U. moluccensis, U. subvittatus (previously known only from the western Pacific), 0. sulphureus, U. tragula and U. vittatus. Descriptions, biological observations and black and white photographs are given for each of these 13 species. Keys are provided to the genera of Mullidae, to the species occurring in the Red Sea, and to the two Mediterranean species of Mullus that have been reported from the Suez Canal. The distinction between the genera Pseudupeneus and Parupeneus is discussed. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1988
- Authors: Ben-Tuvia, Adam , Kissil, Geerge Wm
- Date: 1988
- Subjects: Mullidae -- Red Sea , Mullidae -- Mediterranean Sea
- Language: English
- Type: Text
- Identifier: vital:15011 , http://hdl.handle.net/10962/d1019744 , ISSN 0073-4381 , ISBN 0-86810-175-3 , Ichthyological Bulletin of the J.L.B. Smith Institute of Ichthyology; No. 52
- Description: Thirteen species of Mullidae (goatfishes or red mullets) occur in the Red Sea: Mulloides flavolineatus, M. vanicolensis, Parupeneus cyclostomus, P. forsskali, P. heptacanthus, P. macronemus, P. rubescens, Upeneus asymmetricus, U. moluccensis, U. subvittatus (previously known only from the western Pacific), 0. sulphureus, U. tragula and U. vittatus. Descriptions, biological observations and black and white photographs are given for each of these 13 species. Keys are provided to the genera of Mullidae, to the species occurring in the Red Sea, and to the two Mediterranean species of Mullus that have been reported from the Suez Canal. The distinction between the genera Pseudupeneus and Parupeneus is discussed. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1988
Stages in the early development of 40 marine fish species with pelagic eggs from the Cape of Good Hope
- Authors: Brownell, Charles L
- Date: 1979
- Language: English
- Type: Text
- Identifier: vital:15014 , http://hdl.handle.net/10962/d1019750 , ISBN 0-86810004-8 , Ichthyological Bulletin J.L.B. Smith Institute of Ichthyology; No. 40
- Description: Pelagic marine fish eggs were collected over a period of 28 months from inshore waters of the Cape of Good Hope. Some 40 species were encountered, of which about 30 were identifiable — either with the aid of published descriptions (particularly those of J. D. F. Gilchrist) or by rearing in the laboratory. Notes are included on the identification of eggs and larvae, duration of the incubation period, spawning season and distribution of the adult, and laboratory rearing. The text is accompanied by 184 figures of eggs, larvae, and juveniles. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1979
- Authors: Brownell, Charles L
- Date: 1979
- Language: English
- Type: Text
- Identifier: vital:15014 , http://hdl.handle.net/10962/d1019750 , ISBN 0-86810004-8 , Ichthyological Bulletin J.L.B. Smith Institute of Ichthyology; No. 40
- Description: Pelagic marine fish eggs were collected over a period of 28 months from inshore waters of the Cape of Good Hope. Some 40 species were encountered, of which about 30 were identifiable — either with the aid of published descriptions (particularly those of J. D. F. Gilchrist) or by rearing in the laboratory. Notes are included on the identification of eggs and larvae, duration of the incubation period, spawning season and distribution of the adult, and laboratory rearing. The text is accompanied by 184 figures of eggs, larvae, and juveniles. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1979
The Congrid eels of the Western Indian Ocean and the Red Sea
- Castle, P H J (Peter Henry John)
- Authors: Castle, P H J (Peter Henry John)
- Date: 1968
- Subjects: Conger eels -- Indian Ocean , Conger eels -- Red Sea , Conger eels
- Language: English
- Type: Text
- Identifier: vital:15005 , http://hdl.handle.net/10962/d1019723 , Ichthyological Bulletin; No. 33
- Description: The eel family Congridae is now known to be represented in the western Indian Ocean (here regarded to be west of 60 E. from and including the Red Sea, to Cape Point) by 11 genera and 19 species as well as at least five distinct larval forms which have not yet been identified. More than half of these species inhabit the shallow and offshore waters of the tropical western Indian Ocean. The remainder are known only from cool-temperate waters off the Cape, with one deep-water Atlantic species and one Mediterranean species also present in this area. Considerable additions to this fauna can be expected as the deep waters off the east coast are more fully sampled. Congrina wallacei sp. nov., de- scribed here from 260-270 fathoms off southern Mozambique and Durban, has rather large teeth on the jaws, a long snout and about 168 vertebrae. At least one species spawns off the Cape, but the majority probably do so over the western edge of the oceanic basins north and south of Madagascar. The shallow-water species show strong affinities with the tropical and cool-temperate Indo-Pacific. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1968
- Authors: Castle, P H J (Peter Henry John)
- Date: 1968
- Subjects: Conger eels -- Indian Ocean , Conger eels -- Red Sea , Conger eels
- Language: English
- Type: Text
- Identifier: vital:15005 , http://hdl.handle.net/10962/d1019723 , Ichthyological Bulletin; No. 33
- Description: The eel family Congridae is now known to be represented in the western Indian Ocean (here regarded to be west of 60 E. from and including the Red Sea, to Cape Point) by 11 genera and 19 species as well as at least five distinct larval forms which have not yet been identified. More than half of these species inhabit the shallow and offshore waters of the tropical western Indian Ocean. The remainder are known only from cool-temperate waters off the Cape, with one deep-water Atlantic species and one Mediterranean species also present in this area. Considerable additions to this fauna can be expected as the deep waters off the east coast are more fully sampled. Congrina wallacei sp. nov., de- scribed here from 260-270 fathoms off southern Mozambique and Durban, has rather large teeth on the jaws, a long snout and about 168 vertebrae. At least one species spawns off the Cape, but the majority probably do so over the western edge of the oceanic basins north and south of Madagascar. The shallow-water species show strong affinities with the tropical and cool-temperate Indo-Pacific. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1968
Ichthyofaunal characteristics of a typical temporarily open/closed estuary on the southeast coast of South Africa
- Cowley, Paul D, Heemstra, Phillip C
- Authors: Cowley, Paul D , Heemstra, Phillip C
- Date: 2001
- Subjects: Estuarine fishes -- Ecology -- Indian Ocean , Estuarine ecology -- South Africa , Fish communities -- South Africa , Fish communities -- Indian Ocean
- Language: English
- Type: Text
- Identifier: vital:15021 , http://hdl.handle.net/10962/d1019862 , ISSN 0073-4381 , Ichthyological Bulletin J.L.B. Smith Institute of Ichthyology; No. 71
- Description: The present study was undertaken to describe the species composition, size composition and distribution of the fish fauna associated with the temporarily open/closed East Kleinemonde Estuary on the southeast coast of South Africa. Data collected on the estuary mouth condition from March 1993 to August 1997 indicated that this system was predominantly closed, while open mouth conditions were unseasonal and prevailed for only a short duration following periods of high rainfall. Fishes were sampled throughout the estuary between April 1993 and January 1997 using seine and gill nets. A total of 30 species belonging to 17 families were recorded, including the critically endangered estuarine pipefish Syngnathus watermeyeri. Besides the estuarine pipefish, an additional five species capable of completing their life cycle within the estuary were recorded. The ichthyofaunal community was dominated by 18 marine-spawning species with varying degrees of dependence on estuaries as nursery areas. The marine species that are not dependent on estuaries as nursery areas were represented by three species, while the euryhaline freshwater species, obligate catadromous species and facultative catadromous species were each represented by one species. The dominant members of the estuarine-spawning group were well represented by all post-larval life-history stages, whereas the mean size of each marine-spawning species indicated that juvenile size classes dominated this group. Classification and ordination of both the small- and large-mesh seine net fish assemblages revealed a high degree of similarity throughout the estuary, with the exception of a distinct grouping associated with sandy substrata in the lower reaches of the system. Catch per unit effort (CPUE) data provided evidence of spatial segregation by several species as well as within some families (e.g. Gobiidae). , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 2001
- Authors: Cowley, Paul D , Heemstra, Phillip C
- Date: 2001
- Subjects: Estuarine fishes -- Ecology -- Indian Ocean , Estuarine ecology -- South Africa , Fish communities -- South Africa , Fish communities -- Indian Ocean
- Language: English
- Type: Text
- Identifier: vital:15021 , http://hdl.handle.net/10962/d1019862 , ISSN 0073-4381 , Ichthyological Bulletin J.L.B. Smith Institute of Ichthyology; No. 71
- Description: The present study was undertaken to describe the species composition, size composition and distribution of the fish fauna associated with the temporarily open/closed East Kleinemonde Estuary on the southeast coast of South Africa. Data collected on the estuary mouth condition from March 1993 to August 1997 indicated that this system was predominantly closed, while open mouth conditions were unseasonal and prevailed for only a short duration following periods of high rainfall. Fishes were sampled throughout the estuary between April 1993 and January 1997 using seine and gill nets. A total of 30 species belonging to 17 families were recorded, including the critically endangered estuarine pipefish Syngnathus watermeyeri. Besides the estuarine pipefish, an additional five species capable of completing their life cycle within the estuary were recorded. The ichthyofaunal community was dominated by 18 marine-spawning species with varying degrees of dependence on estuaries as nursery areas. The marine species that are not dependent on estuaries as nursery areas were represented by three species, while the euryhaline freshwater species, obligate catadromous species and facultative catadromous species were each represented by one species. The dominant members of the estuarine-spawning group were well represented by all post-larval life-history stages, whereas the mean size of each marine-spawning species indicated that juvenile size classes dominated this group. Classification and ordination of both the small- and large-mesh seine net fish assemblages revealed a high degree of similarity throughout the estuary, with the exception of a distinct grouping associated with sandy substrata in the lower reaches of the system. Catch per unit effort (CPUE) data provided evidence of spatial segregation by several species as well as within some families (e.g. Gobiidae). , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 2001
Review of the Indo-Pacific pipefish genus Doryrhamphus Kaup (Pisces: Syngnathidae) with descriptions of a new species and a new subspecies
- Dawson, C E (Charles E.), 1922-
- Authors: Dawson, C E (Charles E.), 1922-
- Date: 1981
- Subjects: Pipefishes -- Indo-Pacific Region -- Classification
- Language: English
- Type: Text
- Identifier: vital:14990 , http://hdl.handle.net/10962/d1018959 , Ichthyological Bulletin of the J.L.B. Smith Institute of Ichthyology; No. 44
- Description: Dawson, C.E. 1981. Review of the Indo-Pacific Pipefish Genus Doryrhamphus Kaup (Pisces: Syngnathidae), with Descriptions of a New Species and a New Subspecies. Ichthyological Bulletin of the J.L.B. Smith Institute of Ichthyology, No. 44, 27 pages, 17 figures. Doryrhamphus, a genus of trunk-pouch pipefishes commonly associated with rock or coral habitats, is diagnosed and a key is provided to the five species and five subspecies recognized. The genus Dentirostrum Herald and Randall is synonymized with Doryrhamphus, treated species and subspecies are diagnosed and illustrated, distribution (based on material examined) is delineated and comprehensive synonymies are provided. The genus includes two species groups which, (in subadults and adults) differ in having either one or two spines on principal ridges of the posterior predorsal rings. Species of the single-spine group are distinguished by differences in meristic values and preserved coloration, as well as by the presence of one or two ventrolateral projections on the snout of males, or the absence thereof. Species of the two-spine group are distinguished by differences in meristic values and preserved coloration, as well as by the presence of either one or two spines on principal ridges of tail rings. The single-spine group includes the type-species, D. excisus (three subspecies), with one ventrolateral projection on snout in males, A japonicus with no projection on snout, and D. bicarinatus n. sp. with two projections on snout. Doryrhamphus e. excisus (a senior synonym of D. melanopleura), with modally 17-18 trunk rings ranges from eastern Africa and Persian Gulf to the west coast of the Americas. This pipefish, the most widely distributed syngnathid, exhibits some west-east clinal increase in counts of total rings and dorsal-fin rays. Doryrhamphus e. abbreviatus n. ssp. is a Red Sea endemic characterized by modally 16 trunk rings as well as by 26-28 total rings and 18-20 dorsal-fin rays. D. e. paulus (Revillagegido Is., Mexico) shares the modal count of 16 trunk rings, but has 30-32 total rings and 23-27 dorsal-fin rays. D. japonicus (19-20 trunk rings) is known only from the main islands of Japan, whereas D. bicarinatus (16 trunk rings) is known from Indian Ocean coasts of South Africa and Mozambique. The two-spine group includes D. negrosensis (2 subspecies) with 2 spines on ridges of tail rings in subadults and adults and A janssi (one spine on ridges of tail rings. A n. negrosensis (modally 15 trunk and 29 total rings) is known from Borneo to the Ryukyu Is. and southeastward to the New Hebrides, excluding Australia. D. n. malus (modally, 16 trunk and 31 total rings) is an Australian Great Barrier Reef endemic. D. janssi, with more tail rings than D. negrosensis (21-23 versus 13-16), is known from the eastern Indian Ocean (off NW Australia) and from the Gulf of Thailand and Philippines southeastward to New Guinea and NE Australia in the western Pacific Ocean. Planktonic young of A excisus and early juveniles of D. negrosensis are illustrated and briefly described. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1981
- Authors: Dawson, C E (Charles E.), 1922-
- Date: 1981
- Subjects: Pipefishes -- Indo-Pacific Region -- Classification
- Language: English
- Type: Text
- Identifier: vital:14990 , http://hdl.handle.net/10962/d1018959 , Ichthyological Bulletin of the J.L.B. Smith Institute of Ichthyology; No. 44
- Description: Dawson, C.E. 1981. Review of the Indo-Pacific Pipefish Genus Doryrhamphus Kaup (Pisces: Syngnathidae), with Descriptions of a New Species and a New Subspecies. Ichthyological Bulletin of the J.L.B. Smith Institute of Ichthyology, No. 44, 27 pages, 17 figures. Doryrhamphus, a genus of trunk-pouch pipefishes commonly associated with rock or coral habitats, is diagnosed and a key is provided to the five species and five subspecies recognized. The genus Dentirostrum Herald and Randall is synonymized with Doryrhamphus, treated species and subspecies are diagnosed and illustrated, distribution (based on material examined) is delineated and comprehensive synonymies are provided. The genus includes two species groups which, (in subadults and adults) differ in having either one or two spines on principal ridges of the posterior predorsal rings. Species of the single-spine group are distinguished by differences in meristic values and preserved coloration, as well as by the presence of one or two ventrolateral projections on the snout of males, or the absence thereof. Species of the two-spine group are distinguished by differences in meristic values and preserved coloration, as well as by the presence of either one or two spines on principal ridges of tail rings. The single-spine group includes the type-species, D. excisus (three subspecies), with one ventrolateral projection on snout in males, A japonicus with no projection on snout, and D. bicarinatus n. sp. with two projections on snout. Doryrhamphus e. excisus (a senior synonym of D. melanopleura), with modally 17-18 trunk rings ranges from eastern Africa and Persian Gulf to the west coast of the Americas. This pipefish, the most widely distributed syngnathid, exhibits some west-east clinal increase in counts of total rings and dorsal-fin rays. Doryrhamphus e. abbreviatus n. ssp. is a Red Sea endemic characterized by modally 16 trunk rings as well as by 26-28 total rings and 18-20 dorsal-fin rays. D. e. paulus (Revillagegido Is., Mexico) shares the modal count of 16 trunk rings, but has 30-32 total rings and 23-27 dorsal-fin rays. D. japonicus (19-20 trunk rings) is known only from the main islands of Japan, whereas D. bicarinatus (16 trunk rings) is known from Indian Ocean coasts of South Africa and Mozambique. The two-spine group includes D. negrosensis (2 subspecies) with 2 spines on ridges of tail rings in subadults and adults and A janssi (one spine on ridges of tail rings. A n. negrosensis (modally 15 trunk and 29 total rings) is known from Borneo to the Ryukyu Is. and southeastward to the New Hebrides, excluding Australia. D. n. malus (modally, 16 trunk and 31 total rings) is an Australian Great Barrier Reef endemic. D. janssi, with more tail rings than D. negrosensis (21-23 versus 13-16), is known from the eastern Indian Ocean (off NW Australia) and from the Gulf of Thailand and Philippines southeastward to New Guinea and NE Australia in the western Pacific Ocean. Planktonic young of A excisus and early juveniles of D. negrosensis are illustrated and briefly described. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1981
A taxonomic study of the Genus Lethrinops Regan (Pisces: Cichlidae) from Lake Malawi: part 2
- Eccles, David H, Lewis, Digby S C
- Authors: Eccles, David H , Lewis, Digby S C
- Date: 1978
- Subjects: Lethrinops -- Malawi, Lake -- Classification , Haplochromis -- Malawi, Lake -- Classification
- Language: English
- Type: Text
- Identifier: vital:14989 , http://hdl.handle.net/10962/d1018957 , ISBN 094998096x , Ichthyological Bulletin of the J.L.B. Smith Institute of Ichthyology; No. 37
- Description: Lethrinops argentea Ahl, L. lethrinus (Gunther) and L. leptodon Regan are re-described and illustrated. An additional new species, L. longipinnis, sharing with the above the possession a steeply sloping, wedge-shaped snout, a slender lower pharyngeal bone and few (9—14) gillrakers is described. The status of L. lunaris Trewavas is discussed. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1978
- Authors: Eccles, David H , Lewis, Digby S C
- Date: 1978
- Subjects: Lethrinops -- Malawi, Lake -- Classification , Haplochromis -- Malawi, Lake -- Classification
- Language: English
- Type: Text
- Identifier: vital:14989 , http://hdl.handle.net/10962/d1018957 , ISBN 094998096x , Ichthyological Bulletin of the J.L.B. Smith Institute of Ichthyology; No. 37
- Description: Lethrinops argentea Ahl, L. lethrinus (Gunther) and L. leptodon Regan are re-described and illustrated. An additional new species, L. longipinnis, sharing with the above the possession a steeply sloping, wedge-shaped snout, a slender lower pharyngeal bone and few (9—14) gillrakers is described. The status of L. lunaris Trewavas is discussed. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1978
A taxonomic study of the Genus Lethrinops Regan (Pisces: Cichlidae) from Lake Malawi: part 3
- Eccles, David H, Lewis, Digby S C
- Authors: Eccles, David H , Lewis, Digby S C
- Date: 1979
- Subjects: Lethrinops -- Malawi, Lake -- Classification , Haplochromis -- Malawi, Lake -- Classification
- Language: English
- Type: Text
- Identifier: vital:15007 , http://hdl.handle.net/10962/d1019730 , ISBN 0868100021 , Ichthyological Bulletin of the J.L.B. Smith Institute of Ichthyology; No. 38
- Description: The group of species considered all have short moderate snouts and a group of slightly to strongly enlarged teeth on the lower pharyngeal bone, the anterior and lateral teeth of which are biscupid, with the posterior cusp turned forwards. Lethrinops parvidens Trewavas, L. aurita (Regan), L. macrophthalmus (Boulenger), L. macrochir (Regan), L.longimanus Trewavas and L. macracanthus Trewavas are re-described, and L. mylodon n. sp. is described, the latter being divided into two geographically seperated sub-species. While L. longimanus and L. macracanthus co-exist with very slight overlap of morphological characters in the south of Lake Malawi, an apparently intermediate population is reported from another part of the Lake. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1979
- Authors: Eccles, David H , Lewis, Digby S C
- Date: 1979
- Subjects: Lethrinops -- Malawi, Lake -- Classification , Haplochromis -- Malawi, Lake -- Classification
- Language: English
- Type: Text
- Identifier: vital:15007 , http://hdl.handle.net/10962/d1019730 , ISBN 0868100021 , Ichthyological Bulletin of the J.L.B. Smith Institute of Ichthyology; No. 38
- Description: The group of species considered all have short moderate snouts and a group of slightly to strongly enlarged teeth on the lower pharyngeal bone, the anterior and lateral teeth of which are biscupid, with the posterior cusp turned forwards. Lethrinops parvidens Trewavas, L. aurita (Regan), L. macrophthalmus (Boulenger), L. macrochir (Regan), L.longimanus Trewavas and L. macracanthus Trewavas are re-described, and L. mylodon n. sp. is described, the latter being divided into two geographically seperated sub-species. While L. longimanus and L. macracanthus co-exist with very slight overlap of morphological characters in the south of Lake Malawi, an apparently intermediate population is reported from another part of the Lake. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1979
A taxonomic study of the Genus Lethrinops Regan (Pisces: Cichlidae) from Lake Malawi: part 1
- Eccles, David H, Lewis, Digby S C
- Authors: Eccles, David H , Lewis, Digby S C
- Date: 1977
- Subjects: Lethrinops -- Malawi, Lake -- Classification , Haplochromis -- Malawi, Lake -- Classification
- Language: English
- Type: Text
- Identifier: vital:14988 , http://hdl.handle.net/10962/d1018956 , ISBN 949980854 , Ichthyological Bulletin of the J.L.B. Smith Institute of Ichthyology; No. 36
- Description: Haplochromis micrentodon Regan is transferred to the genus Lethrinops and redescribed. Two new species of Lethrinops which, like the above, are characterised by the possession of lower pharyngeal bones bearing close pavements of slender blunt-tipped teeth are described. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1977
- Authors: Eccles, David H , Lewis, Digby S C
- Date: 1977
- Subjects: Lethrinops -- Malawi, Lake -- Classification , Haplochromis -- Malawi, Lake -- Classification
- Language: English
- Type: Text
- Identifier: vital:14988 , http://hdl.handle.net/10962/d1018956 , ISBN 949980854 , Ichthyological Bulletin of the J.L.B. Smith Institute of Ichthyology; No. 36
- Description: Haplochromis micrentodon Regan is transferred to the genus Lethrinops and redescribed. Two new species of Lethrinops which, like the above, are characterised by the possession of lower pharyngeal bones bearing close pavements of slender blunt-tipped teeth are described. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1977
Comparative osteology of the shallow water cardinal fishes (Perciformes: Apogonidae) with reference to the systematics and evolution of the family
- Authors: Fraser, Thomas H
- Date: 1972
- Subjects: Cardinalfishes -- Anatomy , Cardinalfishes -- Evolution
- Language: English
- Type: Text
- Identifier: vital:15016 , http://hdl.handle.net/10962/d1019795 , Ichthyological Bulletin of the J.L.B. Smith Institute of Ichthyology; No. 34
- Description: The osteology and swim bladders of the perciform family Apogonidae are surveyed at the generic level based on the examination of more than 150 species. Three subfamilies are recognized—Epigoninae, Apogoninae and Pseudaminae. The genera of Epigoninae are not treated. The Cheilodipterinae and the Siphaminae are not recognized as subfamilies and the Synagropi- nae are removed from the Apogonidae to the Percichthyidae. Descriptions of 19 genera and 14 subgenera are given. Forty-three genera are placed in synonymy and three new subgenera are proposed: Pristicon, Verulux and Zapogon. Keys to the three subfamilies and to the recognized genera and subgenera in the Apogoninae and Pseudaminae are presented. Discussions of the evolution of functional bony units within the Apogonidae are linked with trends seen in the beryciform-percoid transition and continuing changes exhibited by living percoids. The evolution and relationships of the living genera in the Apogoninae and Pseudaminae are treated and their zoogeography is briefly examined. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1972
- Authors: Fraser, Thomas H
- Date: 1972
- Subjects: Cardinalfishes -- Anatomy , Cardinalfishes -- Evolution
- Language: English
- Type: Text
- Identifier: vital:15016 , http://hdl.handle.net/10962/d1019795 , Ichthyological Bulletin of the J.L.B. Smith Institute of Ichthyology; No. 34
- Description: The osteology and swim bladders of the perciform family Apogonidae are surveyed at the generic level based on the examination of more than 150 species. Three subfamilies are recognized—Epigoninae, Apogoninae and Pseudaminae. The genera of Epigoninae are not treated. The Cheilodipterinae and the Siphaminae are not recognized as subfamilies and the Synagropi- nae are removed from the Apogonidae to the Percichthyidae. Descriptions of 19 genera and 14 subgenera are given. Forty-three genera are placed in synonymy and three new subgenera are proposed: Pristicon, Verulux and Zapogon. Keys to the three subfamilies and to the recognized genera and subgenera in the Apogoninae and Pseudaminae are presented. Discussions of the evolution of functional bony units within the Apogonidae are linked with trends seen in the beryciform-percoid transition and continuing changes exhibited by living percoids. The evolution and relationships of the living genera in the Apogoninae and Pseudaminae are treated and their zoogeography is briefly examined. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1972
The taxonomic status and phylogenetic relationship of Pseudocrenilabrus Fowler (Teleostei, Cichilidae)
- Authors: Greenwood, Peter Humphrey
- Date: 1989
- Language: English
- Type: Text
- Identifier: vital:15004 , http://hdl.handle.net/10962/d1019722 , ISSN 0073-4381 , Ichthyological Bulletin of the J.L.B. Smith Institute of Ichthyology; No. 54
- Description: Various and disparate opinions have been expressed with regard to the phylogenetic affinities of Pseudocrenilabrus, a seemingly generalized and primitive haplochromine genus. These views are reconsidered and rejected. Instead, it is suggested that Pseudocrenilabrus is a derived and paedomorphic taxon evolved from a generalized haplochromine ancestor such as would be represented amongst extant African cichlids by a species of the genus Astatotilapia; for the moment it is not possible to identify a sister group more precisely. The suggestion that Pseudocrenilabrus is a paedomorphic taxon is based on certain Osteological and dental features, particularly the reductional trend manifest in the infraorbital bones of its three constituent species. A new diagnosis and synonomy are provided for the genus, together with notes on its anatomy, osteology and meristic features. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1989
- Authors: Greenwood, Peter Humphrey
- Date: 1989
- Language: English
- Type: Text
- Identifier: vital:15004 , http://hdl.handle.net/10962/d1019722 , ISSN 0073-4381 , Ichthyological Bulletin of the J.L.B. Smith Institute of Ichthyology; No. 54
- Description: Various and disparate opinions have been expressed with regard to the phylogenetic affinities of Pseudocrenilabrus, a seemingly generalized and primitive haplochromine genus. These views are reconsidered and rejected. Instead, it is suggested that Pseudocrenilabrus is a derived and paedomorphic taxon evolved from a generalized haplochromine ancestor such as would be represented amongst extant African cichlids by a species of the genus Astatotilapia; for the moment it is not possible to identify a sister group more precisely. The suggestion that Pseudocrenilabrus is a paedomorphic taxon is based on certain Osteological and dental features, particularly the reductional trend manifest in the infraorbital bones of its three constituent species. A new diagnosis and synonomy are provided for the genus, together with notes on its anatomy, osteology and meristic features. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1989
A contribution to the taxonomy of the marine fish genus Argyrosomus (Perciformes: Sciaenidae), with descriptions of two new species from southern Africa
- Griffiths, Marc H, Heemstra, Phillip C
- Authors: Griffiths, Marc H , Heemstra, Phillip C
- Date: 1995
- Language: English
- Type: Text
- Identifier: vital:15027 , http://hdl.handle.net/10962/d1019891 , ISSN 0073-4381 , Ichthyological Bulletin J.L.B. Smith Institute of Ichthyology; No. 65
- Description: Study of the biology, anatomy and taxonomy of the sciaenid fishes of the genus Argyrosomus from South Africa and Namibia revealed that three species were confused under the name ‘Argyrosomus hololepidotus (Lacepede, 1801)”. Comparison of morphometric and meristic data, otoliths, swim-bladders, drumming muscles, and other morphological features, of specimens from southern Africa, Madagascar, the Mediterranean Sea, the eastern Atlantic Ocean, Japan and Australia, established that the “A. hololepidotus” of recent authors is a complex of four species: A. japonicus (Temminck & Schlegel, 1843), which occurs off southern Africa, Japan and Australia; A. inodorus sp. nov., which is known from Namibia to the Kei River (32°40’S) on the east coast of South Africa; A. coronus sp. nov., which is known from central and northern Namibia and Angola, and A. hololepidotus, which appears to be endemic to Madagascar. These four species are compared with A. regius (Asso, 1801) of the Mediterranean and eastern Atlantic, A. thorpei Smith, 1977 from South Africa, Mozambique and the west coast of Madagascar, and A. beccus Sasaki, 1994 known only from Durban harbour. To promote stability in the nomenclature and to resolve the confusion in the taxonomy of Argyrosomus species, neotypes are selected for A. hololepidotus and A. japonicus. The biology, distributions and fisheries of six species are reviewed. Distribution patterns for the southern African species and a key to the seven species known from Africa and Madagascar (A. regius, A. japonicus, A. inodorus, A. coronus, A. thorpei, A. beccus, and A. hololepidotus) are provided. The composition and distinction of the genus Argyrosomus are briefly discussed. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1995
- Authors: Griffiths, Marc H , Heemstra, Phillip C
- Date: 1995
- Language: English
- Type: Text
- Identifier: vital:15027 , http://hdl.handle.net/10962/d1019891 , ISSN 0073-4381 , Ichthyological Bulletin J.L.B. Smith Institute of Ichthyology; No. 65
- Description: Study of the biology, anatomy and taxonomy of the sciaenid fishes of the genus Argyrosomus from South Africa and Namibia revealed that three species were confused under the name ‘Argyrosomus hololepidotus (Lacepede, 1801)”. Comparison of morphometric and meristic data, otoliths, swim-bladders, drumming muscles, and other morphological features, of specimens from southern Africa, Madagascar, the Mediterranean Sea, the eastern Atlantic Ocean, Japan and Australia, established that the “A. hololepidotus” of recent authors is a complex of four species: A. japonicus (Temminck & Schlegel, 1843), which occurs off southern Africa, Japan and Australia; A. inodorus sp. nov., which is known from Namibia to the Kei River (32°40’S) on the east coast of South Africa; A. coronus sp. nov., which is known from central and northern Namibia and Angola, and A. hololepidotus, which appears to be endemic to Madagascar. These four species are compared with A. regius (Asso, 1801) of the Mediterranean and eastern Atlantic, A. thorpei Smith, 1977 from South Africa, Mozambique and the west coast of Madagascar, and A. beccus Sasaki, 1994 known only from Durban harbour. To promote stability in the nomenclature and to resolve the confusion in the taxonomy of Argyrosomus species, neotypes are selected for A. hololepidotus and A. japonicus. The biology, distributions and fisheries of six species are reviewed. Distribution patterns for the southern African species and a key to the seven species known from Africa and Madagascar (A. regius, A. japonicus, A. inodorus, A. coronus, A. thorpei, A. beccus, and A. hololepidotus) are provided. The composition and distinction of the genus Argyrosomus are briefly discussed. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1995
Fish community structure in three temporarily open/closed estuaries on the Natal coast
- Harrison, Trevor D, Whitfield, Alan K
- Authors: Harrison, Trevor D , Whitfield, Alan K
- Date: 1995
- Language: English
- Type: Text
- Identifier: vital:15026 , http://hdl.handle.net/10962/d1019890 , ISSN 0073-4381 , Ichthyological Bulletin J.L.B. Smith Institute of Ichthyology; No. 64
- Description: The fishes of three small Natal estuaries, the Mhlanga, Damba and Zotsha were sampled over a period of two years. A total of 68 fish taxa representing 24 families, 39 genera and 55 species were captured during this study. Forty seven fish taxa were recorded in the Mhlanga estuary of which Gilchristella aestuaria, Oreochromis mossambicus, Valamugil cunnesius, Valamugil sp. and juvenile mugilids numerically dominated. In terms of biomass, O. mossambicus, V. cunnesius, Liza alata, Myxus capensis and Mugil cephalus dominated the ichthyofauna of the Mhlanga system. In the Damba estuary, 24 fish taxa were recorded, the most abundant being Glossogobius callidus,M. capensis and 0. mossambicus. M. capensis, M. cephalus, O. mossambicus and G. callidus dominated the fish biomass captured in the Damba system. A total of 56 fish taxa were recorded in the Zotsha estuary during this study, with the ichthyofauna numerically dominated by juvenile mugilids, G. aestuaria, O. mossambicus, Rhabdosargus holubi, Terapon jarbua, Ambassis productus and G. callidus. The species which dominated the fish biomass in the Zotsha system were 0. mossambicus L. alata, Valamugil robustus, V. buchanani, M. capensis, M. cephalus and V. cunnesius. Classifying the species according to whether they were resident estuarine, freshwater, estuarine-dependent marine or marine species revealed that the first three groups were all well represented in the systems. Oreochromis mossambicus was the dominant freshwater species in all three estuaries. Gilchristella aestuaria and Glossogobius callidus were the principal estuarine species in the Mhlanga and the Damba respectively, with G. aestuaria, A. productus and G. callidus being the dominant estuarine species captured in the Zotsha. The principal estuarine-dependent marine fishes captured in the Mhlanga were V. cunnesius, Valamugil sp., juvenile mugilids, M. capensis, M. cephalus and L. alata. In the Damba, M. capensis and M. cephalus were the dominant estuarine-dependent marine species and in the Zotsha juvenile mugilids, R. holubi, T. jarbua, M. capensis, V. cunnesius, V. robustus, M. cephalus, L. alata and V. buchanani were the principal estuarine-dependent marine species. The results of this study indicate that the estuaries are dominated at different periods by different assemblages of fishes. This is linked to the spawning and migration patterns of the various species as well as the hydrological regime of each estuary. During the winter these systems are normally closed with relatively deep waters and high food resource and habitat availability. Freshwater and estuarine species mainly inhabit the upper reaches of the systems while estuarine-dependent marine species, which dominate the fish community, mainly occupy the middle and lower reaches. When these estuaries open with the onset of the spring/summer rains, adult and sub-adult estuarine-dependent marine species emigrate to the marine environment and juveniles begin recruiting into the systems. Spring is also the peak breeding period of resident estuarine and freshwater species, resulting in an increase in the contribution of these fishes to the overall ichthyofauna during this period. When closed estuaries open the water level falls and this results in the fishes concentrating in the lower reaches of the system where moderate water depths are present, thus further contributing to an increase in the proportion of freshwater and estuarine species in this region. The breaching of closed estuaries also results in a reduction in food resources and habitat availability. Competition and possible increased vulnerability to avian predation (due to the shallow nature of the systems), may contribute to a decrease in the proportion of estuarine and freshwater species in summer. The prolonged recruitment of Of-juveniles of estuarine-dependent marine species results in an increase in the proportion of these fishes present in the estuaries during summer. In autumn, the systems normally close, water levels rise and available food resources and habitat increase. This allows the redistribution of freshwater and estuarine species upstream, leaving estuarine-dependent marine species to dominate the middle and lower reaches. Although temporarily open/closed estuaries along the Natal coast may not be as diverse as permanently open estuaries in terms of their ichthyofauna, their importance must not be underestimated, since by providing a series of sheltered habitats along the coast they may contribute significantly to the viability of estuarine-dependent marine fish stocks. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1995
- Authors: Harrison, Trevor D , Whitfield, Alan K
- Date: 1995
- Language: English
- Type: Text
- Identifier: vital:15026 , http://hdl.handle.net/10962/d1019890 , ISSN 0073-4381 , Ichthyological Bulletin J.L.B. Smith Institute of Ichthyology; No. 64
- Description: The fishes of three small Natal estuaries, the Mhlanga, Damba and Zotsha were sampled over a period of two years. A total of 68 fish taxa representing 24 families, 39 genera and 55 species were captured during this study. Forty seven fish taxa were recorded in the Mhlanga estuary of which Gilchristella aestuaria, Oreochromis mossambicus, Valamugil cunnesius, Valamugil sp. and juvenile mugilids numerically dominated. In terms of biomass, O. mossambicus, V. cunnesius, Liza alata, Myxus capensis and Mugil cephalus dominated the ichthyofauna of the Mhlanga system. In the Damba estuary, 24 fish taxa were recorded, the most abundant being Glossogobius callidus,M. capensis and 0. mossambicus. M. capensis, M. cephalus, O. mossambicus and G. callidus dominated the fish biomass captured in the Damba system. A total of 56 fish taxa were recorded in the Zotsha estuary during this study, with the ichthyofauna numerically dominated by juvenile mugilids, G. aestuaria, O. mossambicus, Rhabdosargus holubi, Terapon jarbua, Ambassis productus and G. callidus. The species which dominated the fish biomass in the Zotsha system were 0. mossambicus L. alata, Valamugil robustus, V. buchanani, M. capensis, M. cephalus and V. cunnesius. Classifying the species according to whether they were resident estuarine, freshwater, estuarine-dependent marine or marine species revealed that the first three groups were all well represented in the systems. Oreochromis mossambicus was the dominant freshwater species in all three estuaries. Gilchristella aestuaria and Glossogobius callidus were the principal estuarine species in the Mhlanga and the Damba respectively, with G. aestuaria, A. productus and G. callidus being the dominant estuarine species captured in the Zotsha. The principal estuarine-dependent marine fishes captured in the Mhlanga were V. cunnesius, Valamugil sp., juvenile mugilids, M. capensis, M. cephalus and L. alata. In the Damba, M. capensis and M. cephalus were the dominant estuarine-dependent marine species and in the Zotsha juvenile mugilids, R. holubi, T. jarbua, M. capensis, V. cunnesius, V. robustus, M. cephalus, L. alata and V. buchanani were the principal estuarine-dependent marine species. The results of this study indicate that the estuaries are dominated at different periods by different assemblages of fishes. This is linked to the spawning and migration patterns of the various species as well as the hydrological regime of each estuary. During the winter these systems are normally closed with relatively deep waters and high food resource and habitat availability. Freshwater and estuarine species mainly inhabit the upper reaches of the systems while estuarine-dependent marine species, which dominate the fish community, mainly occupy the middle and lower reaches. When these estuaries open with the onset of the spring/summer rains, adult and sub-adult estuarine-dependent marine species emigrate to the marine environment and juveniles begin recruiting into the systems. Spring is also the peak breeding period of resident estuarine and freshwater species, resulting in an increase in the contribution of these fishes to the overall ichthyofauna during this period. When closed estuaries open the water level falls and this results in the fishes concentrating in the lower reaches of the system where moderate water depths are present, thus further contributing to an increase in the proportion of freshwater and estuarine species in this region. The breaching of closed estuaries also results in a reduction in food resources and habitat availability. Competition and possible increased vulnerability to avian predation (due to the shallow nature of the systems), may contribute to a decrease in the proportion of estuarine and freshwater species in summer. The prolonged recruitment of Of-juveniles of estuarine-dependent marine species results in an increase in the proportion of these fishes present in the estuaries during summer. In autumn, the systems normally close, water levels rise and available food resources and habitat increase. This allows the redistribution of freshwater and estuarine species upstream, leaving estuarine-dependent marine species to dominate the middle and lower reaches. Although temporarily open/closed estuaries along the Natal coast may not be as diverse as permanently open estuaries in terms of their ichthyofauna, their importance must not be underestimated, since by providing a series of sheltered habitats along the coast they may contribute significantly to the viability of estuarine-dependent marine fish stocks. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1995
A revision of the Zeid fishes (Zeiformes: Zeidae) of South Africa
- Authors: Heemstra, Phillip C
- Date: 1980
- Subjects: Zeidae -- Classification , Fishes -- Classification , Fishes -- South Africa -- Classification
- Language: English
- Type: Text
- Identifier: vital:14994 , http://hdl.handle.net/10962/d1019674 , ISBN 0-86810006-4 , Ichthyological Bulletin J.L.B. Smith Institute of Ichthyology; No. 41
- Description: The zeid fishes of South Africa are revised; five species in four genera are described and illustrated. Paracyttopsis scutatus Gilchrist & von Bonde and Zen itea (Jordan & Fowler) are shown to be junior synonyms of Cyttopsis roseus (Lowe). Zeus japonicus Valenciennes and Zeus australis Richardson are considered synonyms of Zeus faber Linnaeus; there seems to be no basis for recognition of subspecies in this wide-ranging species. Zenopsis ocellatus (Storer) is placed in the synonymy of Zenopsis conchifer (Lowe). A key to the families of zeiform fishes is presented, and diagnosis for those families represented in South African waters are given. Keys to the South African species of Grammicolepididae, Oreosomatidae, and Zeidae are also included. The distributions of zeid fishes are discussed. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1980
- Authors: Heemstra, Phillip C
- Date: 1980
- Subjects: Zeidae -- Classification , Fishes -- Classification , Fishes -- South Africa -- Classification
- Language: English
- Type: Text
- Identifier: vital:14994 , http://hdl.handle.net/10962/d1019674 , ISBN 0-86810006-4 , Ichthyological Bulletin J.L.B. Smith Institute of Ichthyology; No. 41
- Description: The zeid fishes of South Africa are revised; five species in four genera are described and illustrated. Paracyttopsis scutatus Gilchrist & von Bonde and Zen itea (Jordan & Fowler) are shown to be junior synonyms of Cyttopsis roseus (Lowe). Zeus japonicus Valenciennes and Zeus australis Richardson are considered synonyms of Zeus faber Linnaeus; there seems to be no basis for recognition of subspecies in this wide-ranging species. Zenopsis ocellatus (Storer) is placed in the synonymy of Zenopsis conchifer (Lowe). A key to the families of zeiform fishes is presented, and diagnosis for those families represented in South African waters are given. Keys to the South African species of Grammicolepididae, Oreosomatidae, and Zeidae are also included. The distributions of zeid fishes are discussed. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1980
Dinopercidae, a new family for the Percoid marine fish genera Dinoperca Boulenger and Centrarchops Fowler (Pisces: Perciformes)
- Heemstra, Phillip C, Hecht, Thomas
- Authors: Heemstra, Phillip C , Hecht, Thomas
- Date: 1986
- Subjects: Perciformes -- Classification
- Language: English
- Type: Text
- Identifier: vital:15010 , http://hdl.handle.net/10962/d1019743 , ISSN 0073-4381 , Ichthyological Bulletin J.L.B. Smith Institute of Ichthyology; No. 51
- Description: The Genus Dinoperca was erected by Boulenger (1895) for the Northern Indian Ocean species Hapalogenys petersi Day and assigned to the Family Serranidae. Boulenger (1903) described a second species, D. queketti, from South Africa. Most subsequent authors have accepted the placement of Dinoperca in the Serranidae, but Johnson (1983) removed it from the Serranidae to the taxonomic limbo of “Incertae sedis’’. Centrarchops Fowler (1923), with a single West African species, was originally assigned to the Serranidae and has been treated by subsequent authors in the Serranidae. The osteology, myology and the otolith (sagitta) of D. petersi reveal no characters that would relate Dinoperca to any particular family of percoids. Furthermore, the presence or absence of certain characters preclude Dinoperca and Centrarchops from the Family Serranidae, and the superfamilies Haemuloidea, Lutjanoidea and Sparoidea. Two features appear to be uniquely derived characters (synapomorphies) justifying a separate family for Dinoperca and Centrarchops: (1) Frontal bones bearing a high median crest that articulates posteriorly with the supraoccipital crest and is cleft dorsally by a narrow median sulcus extending ventrally to the roof of the brain cavity. (2) Large swim-bladder with three pairs of large intrinsic muscles. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1986
- Authors: Heemstra, Phillip C , Hecht, Thomas
- Date: 1986
- Subjects: Perciformes -- Classification
- Language: English
- Type: Text
- Identifier: vital:15010 , http://hdl.handle.net/10962/d1019743 , ISSN 0073-4381 , Ichthyological Bulletin J.L.B. Smith Institute of Ichthyology; No. 51
- Description: The Genus Dinoperca was erected by Boulenger (1895) for the Northern Indian Ocean species Hapalogenys petersi Day and assigned to the Family Serranidae. Boulenger (1903) described a second species, D. queketti, from South Africa. Most subsequent authors have accepted the placement of Dinoperca in the Serranidae, but Johnson (1983) removed it from the Serranidae to the taxonomic limbo of “Incertae sedis’’. Centrarchops Fowler (1923), with a single West African species, was originally assigned to the Serranidae and has been treated by subsequent authors in the Serranidae. The osteology, myology and the otolith (sagitta) of D. petersi reveal no characters that would relate Dinoperca to any particular family of percoids. Furthermore, the presence or absence of certain characters preclude Dinoperca and Centrarchops from the Family Serranidae, and the superfamilies Haemuloidea, Lutjanoidea and Sparoidea. Two features appear to be uniquely derived characters (synapomorphies) justifying a separate family for Dinoperca and Centrarchops: (1) Frontal bones bearing a high median crest that articulates posteriorly with the supraoccipital crest and is cleft dorsally by a narrow median sulcus extending ventrally to the roof of the brain cavity. (2) Large swim-bladder with three pairs of large intrinsic muscles. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1986
Hexatrygonidae, a new family of stingrays (Myliobatiformes: Batoidea) from South Africa, with comments on the classification of Batoid fishes
- Heemstra, Phillip C, Smith, Margaret Mary
- Authors: Heemstra, Phillip C , Smith, Margaret Mary
- Date: 1980
- Subjects: Hexatrygonidae , Hexatrygon bickelli , Stingrays -- South Africa -- Classification , Rajiformes -- South Africa -- Classification
- Language: English
- Type: Text
- Identifier: vital:14996 , http://hdl.handle.net/10962/d1019701 , ISBN 0-86810-038-2 , Ichthyological Bulletin of the J.L.B. Smith Institute of Ichthyology; No. 43
- Description: A new species of stingray, Hexatrygon bickelli Heemstra and Smith, is described from a specimen washed up on a beach at Port Elizabeth on the south coast of South Africa. This new species differs from all other batoid fishes in having six gill arches and a peculiar hypertrophied snout that appears to be a well-developed electroreceptive organ, and in the configuration of its spiracles. Other characters that separate H. bickelli from previously known rays (myliobatiforms) are its small simple brain (other rays have a very large complex brain) and the absence of supraorbital crests on the cranium. In addition, all myliobatiforms are neritic (with none having been recorded below 200 m), and H. bickelli is.presumed to live in moderately deep water (400 to 1000 m). The classification of batoid fishes is reviewed, and Hexatrygon is placed in a new family and suborder of the Myliobatiformes. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1980
- Authors: Heemstra, Phillip C , Smith, Margaret Mary
- Date: 1980
- Subjects: Hexatrygonidae , Hexatrygon bickelli , Stingrays -- South Africa -- Classification , Rajiformes -- South Africa -- Classification
- Language: English
- Type: Text
- Identifier: vital:14996 , http://hdl.handle.net/10962/d1019701 , ISBN 0-86810-038-2 , Ichthyological Bulletin of the J.L.B. Smith Institute of Ichthyology; No. 43
- Description: A new species of stingray, Hexatrygon bickelli Heemstra and Smith, is described from a specimen washed up on a beach at Port Elizabeth on the south coast of South Africa. This new species differs from all other batoid fishes in having six gill arches and a peculiar hypertrophied snout that appears to be a well-developed electroreceptive organ, and in the configuration of its spiracles. Other characters that separate H. bickelli from previously known rays (myliobatiforms) are its small simple brain (other rays have a very large complex brain) and the absence of supraorbital crests on the cranium. In addition, all myliobatiforms are neritic (with none having been recorded below 200 m), and H. bickelli is.presumed to live in moderately deep water (400 to 1000 m). The classification of batoid fishes is reviewed, and Hexatrygon is placed in a new family and suborder of the Myliobatiformes. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1980