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Aspects of the biology and population dynamics of the deep-water commercially exploited crabs off South West Africa/Namibia
Bibliography: pages 170-172.
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| Main Author: | |
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
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Department of Biological Sciences
2016
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| _version_ | 1867613189945950208 |
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| access_status_str | Open Access |
| author | Melville-Smith, Roy |
| author2 | Griffiths, Charles L |
| author_browse | Griffiths, Charles L Melville-Smith, Roy |
| author_facet | Griffiths, Charles L Melville-Smith, Roy |
| author_sort | Melville-Smith, Roy |
| collection | Thesis |
| description | Bibliography: pages 170-172. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/16376 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:32:12.136Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2016 |
| publishDateRange | 2016 |
| publishDateSort | 2016 |
| publisher | Department of Biological Sciences |
| publisherStr | Department of Biological Sciences |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/16376 Aspects of the biology and population dynamics of the deep-water commercially exploited crabs off South West Africa/Namibia Melville-Smith, Roy Griffiths, Charles L Zoology Bibliography: pages 170-172. Two crab species have been exploited on the South West African/ Namibian continental slope since 1973. The deep-sea red crab Geryon maritae forms >99 percent of the catch made by traps, the balance being a by-catch of stone crab Lithodes tropicalis. Historical information dating back to the late 1970's has been examined, but most of the data analysed in this study have been collected since 1980. Most of the research has been conducted on red crab. Four aspects of its biology have been examined in some detail, namely its reproduction, growth, movements and causes of its specific dep t h zonation off Namibia. These (particularly the first two) aspects have been used, together with information from commercial sampling and catch statistics, to examine possible changes in the yield-per-recruit should the age at first capture be increased, or fishing effort reduced. On the basis of these results, some management options are presented. Several techniques (photography, trawling, effective fishing area and tag-recapture) have been used to examine the abundance and density of red crab off Namibia, and are critically compared . Research on the stone crab has been largely restricted to an analysis of commercial catch data, though an unusual symbiotic relationship with a liparid fish has been identified and discussed. 2016-01-12T11:27:57Z 2016-01-12T11:27:57Z 1987 Doctoral Thesis Doctoral PhD http://hdl.handle.net/11427/16376 eng application/pdf Department of Biological Sciences Faculty of Science University of Cape Town |
| spellingShingle | Zoology Melville-Smith, Roy Aspects of the biology and population dynamics of the deep-water commercially exploited crabs off South West Africa/Namibia |
| thesis_degree_str | Doctoral |
| title | Aspects of the biology and population dynamics of the deep-water commercially exploited crabs off South West Africa/Namibia |
| title_full | Aspects of the biology and population dynamics of the deep-water commercially exploited crabs off South West Africa/Namibia |
| title_fullStr | Aspects of the biology and population dynamics of the deep-water commercially exploited crabs off South West Africa/Namibia |
| title_full_unstemmed | Aspects of the biology and population dynamics of the deep-water commercially exploited crabs off South West Africa/Namibia |
| title_short | Aspects of the biology and population dynamics of the deep-water commercially exploited crabs off South West Africa/Namibia |
| title_sort | aspects of the biology and population dynamics of the deep water commercially exploited crabs off south west africa namibia |
| topic | Zoology |
| url | http://hdl.handle.net/11427/16376 |
| work_keys_str_mv | AT melvillesmithroy aspectsofthebiologyandpopulationdynamicsofthedeepwatercommerciallyexploitedcrabsoffsouthwestafricanamibia |