Evidence of genetic differentiation in cigar wrasse Cheilio inermis (Labridae) within the western Indian Ocean:
- Authors: Mayekiso, Sisanda , Gouws, Gavin , Mwale, Monica , Gon, Ofer
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/163499 , vital:41043 , https://doi.org/10.1139/gen-2019-0185
- Description: Patterns of genetic structure and connectivity of the monotypic cigar wrasse Cheilio inermis within western Indian Ocean (WIO) are poorly understood. Whether the species exists as a single panmictic population across the WIO is unclear. Sequence data were generated from two mitochondrial genes (cytochrome b and ATPase 6) and one nuclear intron (S7 intron I). High levels of haplotype and allelic diversity (h = 0.88–0.98; A = 0.95–0.98), along with low nucleotide diversities were observed across all markers.
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- Date Issued: 2020
Enigmatic tissue in the orobranchial chamber of cardinalfishes of the genus Siphamia (Perciformes, Apogonidae)
- Authors: Gon, Ofer , Pinchuck, Shirley C
- Date: 2016
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/443297 , vital:74106 , https://hdl.handle.net/10520/EJC196540
- Description: An unusual tissue covering the tongue and occasionally part of the gill chamber of many species of the Indo-Pacific cardinalfish genus Siphamia is described and compared with an earlier description of a similar tissue found in the cichlid species Alcolapia grahami inhabiting lakes of the African Rift Valley. Species of both genera are mouth brooders. The Siphamia tissue is globular and its cells are oblong, whereas the A. grahami tissue is single-layered, with larger, columnar cells. The tissues of both have the characteristics of a mucosa and show evidence of active synthesis. While ion regulation has been proposed for the A. grahami tissue, the function of the Siphamia tissue is unknown, but a role in feeding, or antibiotic or appetite-suppressing functions have been suggested.
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- Date Issued: 2016
Conserving pattern and process in the Southern Ocean: designing a Marine Protected Area for the Prince Edward Islands
- Authors: Lombard, A T , Reyers, B , Schonegevel, L Y , Cooper, J , Smith-Adao, L B , Nel, D C , Froneman, P William , Ansorge, Isabelle J , Bester, M N , Tosh, C A , Strauss, T , Akkers, T , Gon, Ofer , Leslie, Rob W , Chown, S L
- Date: 2007
- Language: English
- Type: Article
- Identifier: vital:6881 , http://hdl.handle.net/10962/d1011637
- Description: South Africa is currently proclaiming a Marine Protected Area (MPA) in the Exclusive Economic Zone (EEZ) of its sub-Antarctic Prince Edward Islands. The objectives of the MPA are to: 1) contribute to a national and global representative system of MPAs, 2) serve as a scientific reference point to inform future management, 3) contribute to the recovery of the Patagonian toothfish (Dissostichus eleginoides), and 4) reduce the bird bycatch of the toothfish fishery, particularly of albatrosses and petrels. This study employs systematic conservation planning methods to delineate a MPA within the EEZ that will conserve biodiversity patterns and processes within sensible management boundaries, while minimizing conflict with the legal toothfish fishery. After collating all available distributional data on species, benthic habitats and ecosystem processes, we used C-Plan software to delineate a MPA with three management zones: four IUCN Category Ia reserves (13% of EEZ); two Conservation Zones (21% of EEZ); and three Category IV reserves (remainder of EEZ). Compromises between conservation target achievement and the area required by the MPA are apparent in the final reserve design. The proposed MPA boundaries are expected to change over time as new data become available and as impacts of climate change become more evident.
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- Date Issued: 2007
Review of the Cardinalfishes (Perciformes: Apogonidae) of the Red Sea
- Authors: Gon, Ofer , Randall, John E
- Date: 2003
- Language: English
- Type: Article
- Identifier: vital:7150 , http://hdl.handle.net/10962/d1011853
- Description: Twelve genera and 54 species of cardinalfishes are reported from the Red Sea. The Red Sea cardinalfishes include: Apogon annularis Rüppell, A. apogonides (Bleeker), Apogon bryx Fraser, A. campbelli Smith, A. coccineus Rüppell, A. cookii Macleay, A. cyanosoma Bleeker, A. erythrosoma n. sp., A. exostigma (Jordan & Starks), A. fleurieu (Lacepède), A. fraenatus Valenciennes, A. guamensis Valenciennes, A. gularis Fraser & Lachner, A. heptastygma Cuvier, A. isus Randall & Böhlke, A. kallopterus Bleeker, A. leptacanthus Bleeker, A. multitaeniatus Cuvier, A. nigrofasciatus Lachner, A. pharaonis Bellotti, A. pselion Randall, Fraser & Lachner, A. pseudotaeniatus Gon, A. quadrifasciatus Cuvier, A. queketti Gilchrist, A. semiornatus Peters, A. smithi (Kotthaus), A. spilurus Regan, A. taeniatus Cuvier, A. talboti Smith, A. timorensis Bleeker, A. zebrinus Fraser, Randall & Lachner, Apogonichthys perdix Bleeker, Archamia bilineata Gon & Randall, Archamia fucata (Cantor), Archamia lineolata (Cuvier), Cercamia eremia (Allen), Cheilodipterus lachneri Klausewitz, C. lineatus (Forsskål), C. macrodon LacepPde, C. novemstriatus (Rüppell), C. pygmaios Gon, C. quinquelineatus Cuvier, Foa fo Jordan & Seale, Fowleria aurita (Valenciennes), F. marmorata (Alleyne & Macleay), F. vaiulae (Jordan & Seale), F. variegata (Valenciennes), Neamia octospina Smith & Radcliffe, Pseudamia gelatinosa Smith, Rhabdamia cypselura Weber, R. nigrimentum (Smith), R. spilota Allen & Kuiter, Siphamia permutata Klausewitz, and Sphaeramia orbicularis (Cuvier). Twelve (22%) of the apogonid species are endemic. Seven species, i.e. Apogon apogonides, A. campbelli, A. erythrosoma, A. talboti, Foa fo, Rhabdamia spilota and Sphaeramia orbicularis, are new to the Red Sea. Apogon coccineus of previous authors is a complex of three species, including campbelli Smith and erythrosoma n. sp. The dark-striped species of Apogon of the Red Sea previously identified as angustatus, endekataenia, fasciatus, or novemfasciatus are cookii and nigrofasciatus. Red Sea apogonids identified by previous authors as Apogon bandanensis, monochrous, nubilus and savayensis, are guamensis and zebrinus. Apogon micromaculatus Kotthaus is A. spilurus Regan. The specimen of Apogon kiensis reported by Smith (1961) from the Red Sea is A. bryx, recently described from the Philippines. In the genus Fowleria, polystigma (Bleeker) and punctulata (Rüppell) are junior synonyms of variegata (Valenciennes). F. abocellata Goren & Karplus is a junior synonym of vaiulae (Jordan & Seale), and isostigma (Jordan & Seale) does not occur in the Red Sea. Apogon cupreus and A. latus, both of Cuvier, are unidentifiable. A. hyalosoma and A. taeniophorus are doubtful records.
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- Date Issued: 2003
The taxonomie status of Apogon enigmaticus Smith, 1961 (Teleostei, Apogonidae)
- Authors: Gon, Ofer
- Date: 1993
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/447304 , vital:74603 , https://www.ajol.info/index.php/az/article/view/154224
- Description: The validity of the cardinal fish species Apogon enigmaticus, described by Smith (1961) from a single specimen, is reassessed in view of a recent discovery of a second specimen of this species, collected by Smith, in the JLB Smith Institute of Ichthyology. Both fish were re-identified as specimens of A. apogonides (Bleeker, 1856) on the basis of dentition, pigmentation, and counts of pectoral-fin rays, gill rakers and predorsal scales. A. enigmaticas is therefore regarded as a junior synonym of A. apogonides.
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- Date Issued: 1993