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Ancient stonewall fish traps on the south coast of South Africa : documentation, current use, ecological effects and management implications
Includes bibliographical references (leaves 48-54).
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| Main Author: | |
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
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Department of Oceanography
2014
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| _version_ | 1867613146167902208 |
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| access_status_str | Open Access |
| author | Kemp, Lucy Valeska |
| author2 | Branch, George M |
| author_browse | Branch, George M Kemp, Lucy Valeska |
| author_facet | Branch, George M Kemp, Lucy Valeska |
| author_sort | Kemp, Lucy Valeska |
| collection | Thesis |
| description | Includes bibliographical references (leaves 48-54). |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/6485 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:31:30.019Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2014 |
| publishDateRange | 2014 |
| publishDateSort | 2014 |
| publisher | Department of Oceanography |
| publisherStr | Department of Oceanography |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/6485 Ancient stonewall fish traps on the south coast of South Africa : documentation, current use, ecological effects and management implications Kemp, Lucy Valeska Branch, George M Attwood, Colin Applied Marine Science Includes bibliographical references (leaves 48-54). Ancient intertidal stonewall fish traps are found world-wide and those along the SouthAfrican south coast are the focus of my thesis. These fish traps, known locally as 'vywers', have recently enjoyed much media attention as interest increases in both South Africa's cultural heritage and its diminishing fish stocks. Two pioneering studies, by Goodwin (1946) and Avery (1975), provided the only documented knowledge of these vywers. My study aimed to locate, survey and document the main concentrations of vywers within a 300-km stretch along the south coast. A total of 43 sets of vywers was located by aerial surveys, 30 of which are only accessible through private land. This affords them some measure of protection, together with five located off reserves, but diminishes their educational and tourism value. Four sets of vywers were mapped in detail using aerial photogrammetry, a method that provided a rapid, extensive, accurate survey record in the form of geo-rectified ortho-images of these sites. The vywers are built in both exposed and sheltered environments, constructed from in situ rock material built into walls with either angular or curved shapes. These walls may occur singularly or in complexes of up to 25 traps. Vywers are prone to decimation by wave action and storm damage and so require maintenance to retain their characteristic form and associated cultural information. Tensions have, however, arisen between those who maintain and fish the vywers, and fisheries managers. Data from a questionnaire survey compared with records from the literature showed that species composition has not changed significantly in the last five decades. The fish are caught most frequently during new-moon spring-tides, especially in the winter months. The vywer fishery, currently active at only two sets of vywers, targets primarily mullet species (mostly Liza richardsonii) but infrequently enjoys 'bonanza' catches of over-exploited linefish stocks such as galjoen Dichistius capensis. It is these latter catches that concern managers, in addition to the noncompliance of fishers in terms of catch composition and size, permits and gear. 2014-08-13T19:49:15Z 2014-08-13T19:49:15Z 2006 Master Thesis Masters MSc http://hdl.handle.net/11427/6485 eng application/pdf Department of Oceanography Faculty of Science University of Cape Town |
| spellingShingle | Applied Marine Science Kemp, Lucy Valeska Ancient stonewall fish traps on the south coast of South Africa : documentation, current use, ecological effects and management implications |
| thesis_degree_str | Master's |
| title | Ancient stonewall fish traps on the south coast of South Africa : documentation, current use, ecological effects and management implications |
| title_full | Ancient stonewall fish traps on the south coast of South Africa : documentation, current use, ecological effects and management implications |
| title_fullStr | Ancient stonewall fish traps on the south coast of South Africa : documentation, current use, ecological effects and management implications |
| title_full_unstemmed | Ancient stonewall fish traps on the south coast of South Africa : documentation, current use, ecological effects and management implications |
| title_short | Ancient stonewall fish traps on the south coast of South Africa : documentation, current use, ecological effects and management implications |
| title_sort | ancient stonewall fish traps on the south coast of south africa documentation current use ecological effects and management implications |
| topic | Applied Marine Science |
| url | http://hdl.handle.net/11427/6485 |
| work_keys_str_mv | AT kemplucyvaleska ancientstonewallfishtrapsonthesouthcoastofsouthafricadocumentationcurrentuseecologicaleffectsandmanagementimplications |