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dc.contributor.advisorVan As, J. G.
dc.contributor.advisorVan As, L. L.
dc.contributor.authorMöller, Josef-Heinrich
dc.date.accessioned2017-02-02T08:45:32Z
dc.date.available2017-02-02T08:45:32Z
dc.date.issued2011-01
dc.identifier.urihttp://hdl.handle.net/11660/5481
dc.description.abstractEnglish: The family Diplozoidae Palombi, 1949 comprises host specific worms found on the gills of cyprinid fish. Diplozoids are the only members of the Monogenea characterised by a unique monogamous life style where two hermaphroditic adults fuse and live in permanent copula. Little is known of the African Diplozoidae fauna and even less of the Southern African fauna, especially when compared to the European and Asian fauna. The taxonomy of this group of parasites contains a great deal of irregularities and confusion on the placement of species in certain genera. To date two species of Paradiplozoon Achmerov, 1974 are known from Northern Africa, i.e. P. aegyptensis (Fischtal & Kuntz, 1963) collected from Labeo spp. and P. ghanense (Thomas, 1957) described from Alestes spp. Afrodiplozoon polycotyleus (Paperna, 1973), previously of the genus Neodiplozoon Tripathi 1959, was described from Labeo victorianus Boulenger, 1901 in Kenya and from Barbus spp. in Uganda and South Africa. During the present study, it was attempted to clarify the taxonomic disorder and give a review of the African diplozoid fauna. Members of the Diplozoidae were collected from eight cyprinid fish species during fish parasitological surveys over the last 15 years from the Okavango and Orange-Vaal River Systems. Identification of species was mainly done through morphometric analysis. Three different species have been identified belonging to the genera Paradiplozoon, Diplozoon Von Nordmann, 1832 and Afrodiplozoon Khotenovsky, 1980 of which two are newly described species. Paradiplozoon sp. A was collected from Labeo lunatus Jubb, 1963 and Afrodiplozoon polycotyleus from Barbus afrovernayi Nichols & Boulton, 1927, B. multilineatus Worthington, 1933, B. paludinosus Peters, 1852, B. poechii Steindachner, 1911 and B. radiatus Peters, 1853, all from the Okavango River, Botswana. This is also the first records of A. polycotyleus from these hosts. Diplozoon sp. A was collected from Labeo capensis Smith, 1841 and Labeo umbratus Smith, 1841 from the Orange-Vaal River System.en_ZA
dc.description.abstractAfrikaans: Die familie Diplozoidae Palombi, 1949 bestaan uit gasheerspesifieke wurms wat op die kieue van verteenwoordigers van cyprinid visse voorkom. Diplozoidae is die enigste lede van die Monogenea wat deur 'n unieke monogame leefstyl gekenmerk word, bestaande uit twee volwasse hermafroditiese wurms wat aanmekaar vasgroei om sodoende ‘n permanente band te vorm. Min is bekend oor die Afrika diplozoid fauna en selfs minder oor die Suider-Afrikaanse fauna, veral in vergelyking met dit wat oor diplozoids van Europa en Asië bekend is. Groot-skaalse verwarring bestaan oor die taksonomie van hierdie groep parasiete, met onreëlmatighede oor die plasing van spesies in sekere genera. Tot op hede is twee Paradiplozoon Achmerov, 1974 spesies uit Noord-Afrika, naamlik P. aegyptensis (Fischtal & Kuntz, 1963), van Labeo spp. en P. ghanense (Thomas, 1957), vanaf Alestes spp. versamel Afrodiplozoon polycotyleus (Paperna, 1973), voorheen van die genus Neodiplozoon Tripathi 1959, is vanaf Labeo victorianus Boulenger, 1901 in Kenia asook vanaf Barbus spp. uit Uganda en Suid-Afrika beskryf. Gedurende die huidige studie is gepoog om duidelikheid oor die heersende taksonomiese verwarring te bied asook om 'n oorsig van die diplozoid fauna van Afrika te verskaf. Lede van die verteenwoordigers van die Diplozoidae is vanaf agt cyprinid visspesies gedurende parasitologiese opnames wat oor die afgelope 15 jaar uitgevoer is, vanaf visse uit die Okavango en Oranje-Vaal Rivier Stelsels, versamel. Deur middel van morfometriese analises is verskillende spesies, naamlik van die genera Paradiplozoon, Diplozoon Von Nordmann, 1832 en Afrodiplozoon Khotenovsky, 1981 geïdentifiseer waarvan twee as nuwe spesies beskryf word. Paradiplozoon sp. A vanaf Labeo lunatus Jubb, 1963 beskryf, terwyl Afrodiplozoon polycotyleus op Barbus afrovernayi Nichols & Boulton, 1927, B. multilineatus Worthington, 1933, B. paludinosus Peters, 1852, B. poechii Steindachner, 1911 en B. radiatus Peters, 1853, vanuit die Okavangorivier, Botswana versamel is. Dit is ook die eerste aangetekende rekord van A. polycotyleus van hierdie gashere. Diplozoon sp. A is vanaf Labeo capensis Smith, 1841 en Labeo umbratus Smith, 1841 onderskeidelik, uit die Oranje-Vaalrivierstelsel versamel.af
dc.language.isoenen_ZA
dc.publisherUniversity of the Free Stateen_ZA
dc.subjectDissertation (M.Sc. (Zoology and Entomology))--University of the Free State, 2011en_ZA
dc.subjectMonogeneaen_ZA
dc.subjectDiplozoidaeen_ZA
dc.subjectCyprinidsen_ZA
dc.subjectOkavango Riveren_ZA
dc.subjectOrange-Vaal River systemen_ZA
dc.subjectAfrodiplozoonen_ZA
dc.subjectParadiplozoonen_ZA
dc.subjectDiplozoonen_ZA
dc.subjectMorphometric analysisen_ZA
dc.subjectHost specificityen_ZA
dc.subjectFishes -- Parasites -- Africa, Southernen_ZA
dc.subjectMonogenea -- Africa, Southern -- Identificationen_ZA
dc.subjectCyprinidae -- Africa, Southernen_ZA
dc.titleReview of African Diplozoidaeen_ZA
dc.typeDissertationen_ZA
dc.rights.holderUniversity of the Free Stateen_ZA


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