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Electrophoretic analysis of the Cordylus cordylus species group (Sauria: Cordylidae) in the southwestern Cape Province, South Africa
Thesis (M. Sc.) -- University of Stellenbosch, 1991.
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| Format: | Thesis |
| Language: | en_ZA |
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Stellenbosch : Stellenbosch University
2012
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| _version_ | 1867613897910910976 |
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| access_status_str | Open Access |
| author | Brody, Larisa Susanna |
| author2 | Mouton, P. le F. N. |
| author_browse | Brody, Larisa Susanna Mouton, P. le F. N. |
| author_facet | Mouton, P. le F. N. Brody, Larisa Susanna |
| author_sort | Brody, Larisa Susanna |
| collection | Thesis |
| dc_rights_str_mv | Stellenbosch University |
| description | Thesis (M. Sc.) -- University of Stellenbosch, 1991. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/69249 |
| institution | Stellenbosch University (South Africa) |
| language | en_ZA |
| last_indexed | 2026-06-10T12:43:27.297Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2012 |
| publishDateRange | 2012 |
| publishDateSort | 2012 |
| publisher | Stellenbosch : Stellenbosch University |
| publisherStr | Stellenbosch : Stellenbosch University |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/69249 Electrophoretic analysis of the Cordylus cordylus species group (Sauria: Cordylidae) in the southwestern Cape Province, South Africa Brody, Larisa Susanna Mouton, P. le F. N. Grant, W. S. Stellenbosch University. Faculty of Science. Dept. of Botany and Zoology. Cordylidae -- Evolution Cordylidae -- Classification Electrophoresis Dissertations -- Zoology Thesis (M. Sc.) -- University of Stellenbosch, 1991. THe study was divided into two main sections. In the first section the tissue-specific expression of 30 enzymes encoded by 49 presumptive loci in Cordylus oelofseni was examined with starch-gel electrophoresis. The aimwas to search for isozymes that could be used in a study to test a proposed hypothesis on the evaluation and biogeography of the species belonging to the Cordylus cordylus species group in the southwestern Cape. The tissue-specific gene expression in C. oelofseni is similar to that in other lizards. One unexpected locus was detected. It was in the Glucose dehydrogenase system, where a presumably new locus expressed only in the femoral glands was observed. Silencing of one locus may have occurred in the Aconitase and Superoxide dismutase enzyme systems. The most valuable tissues to use in an allele frequency study are liver, muscle, duodenum and heart. In the second section of this project, allozyme frequencies were used to test a proposed hypothesis on the southwestern Cape, by determining the biochemical genetic relationships among taxa in this group. The population structures of the three species in quesetion were also analysed. Low levels of heterozygosity were found in C. oelofseni and C.niger, and intermediate levels in C. cordylus. These levels correlate with the geographical ranges of the species. Genetic distances were calculated among species and approximate times of divergence were estimated. These divergence tiems did not agree with the times suggested by other authors. Both phenetic and cladistic approaches were used to assess relationships among the three Cordylus species under consideration. The results suggest that C.niger is monophyletic but that C. oelofseni is polyphyletic, the Landdroskop population being closer to C.cordylus than to the remaining C.oelofseni populations. It has been demonstrated that avergae genetic distances would not be a reliable aid in decisions regarding the taxanomic status of C. oelofseni. Cordylis niger was shown not to be the sister taxon of C.peersi. Proposed relationships within the Cordylus cordylus species group, as well as monophyly of this group, remain unconfirmed as conflicting results were obtained. Masters 2012-08-27T12:26:59Z 2012-08-27T12:26:59Z 1991 Thesis http://hdl.handle.net/10019.1/69249 en_ZA Stellenbosch University 61 pages : ill. application/pdf Stellenbosch : Stellenbosch University |
| spellingShingle | Cordylidae -- Evolution Cordylidae -- Classification Electrophoresis Dissertations -- Zoology Brody, Larisa Susanna Electrophoretic analysis of the Cordylus cordylus species group (Sauria: Cordylidae) in the southwestern Cape Province, South Africa |
| title | Electrophoretic analysis of the Cordylus cordylus species group (Sauria: Cordylidae) in the southwestern Cape Province, South Africa |
| title_full | Electrophoretic analysis of the Cordylus cordylus species group (Sauria: Cordylidae) in the southwestern Cape Province, South Africa |
| title_fullStr | Electrophoretic analysis of the Cordylus cordylus species group (Sauria: Cordylidae) in the southwestern Cape Province, South Africa |
| title_full_unstemmed | Electrophoretic analysis of the Cordylus cordylus species group (Sauria: Cordylidae) in the southwestern Cape Province, South Africa |
| title_short | Electrophoretic analysis of the Cordylus cordylus species group (Sauria: Cordylidae) in the southwestern Cape Province, South Africa |
| title_sort | electrophoretic analysis of the cordylus cordylus species group sauria cordylidae in the southwestern cape province south africa |
| topic | Cordylidae -- Evolution Cordylidae -- Classification Electrophoresis Dissertations -- Zoology |
| url | http://hdl.handle.net/10019.1/69249 |
| work_keys_str_mv | AT brodylarisasusanna electrophoreticanalysisofthecordyluscordylusspeciesgroupsauriacordylidaeinthesouthwesterncapeprovincesouthafrica |