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Rory lines : silver lining for seabirds in South Africa's demersal trawl fisheries
Includes bibliographical references.
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| Main Author: | |
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
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Department of Biological Sciences
2015
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| _version_ | 1867613515479515136 |
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| access_status_str | Open Access |
| author | Rice, Edward |
| author2 | Ryan, Peter G |
| author_browse | Rice, Edward Ryan, Peter G |
| author_facet | Ryan, Peter G Rice, Edward |
| author_sort | Rice, Edward |
| collection | Thesis |
| description | Includes bibliographical references. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/10902 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:37:22.686Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2015 |
| publishDateRange | 2015 |
| publishDateSort | 2015 |
| 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:11427/10902 Rory lines : silver lining for seabirds in South Africa's demersal trawl fisheries Rice, Edward Ryan, Peter G Wanless, Ross M Maree, Bronwyn Conservation Biology Includes bibliographical references. Seabird bycatch in commercial fisheries is one of the major factors causing decreases in many seabird populations. In trawl fisheries, high mortalities have been recorded as a result of seabirds being struck by trawl warps (the cables used to tow the trawl net). Tori (bird-scaring) lines have been used to decrease seabird mortality in some trawl fisheries by up to 90%. However, tori lines are not effective at reducing the number of birds that drift towards the trawl warps while feeding on factory discards alongside the vessel. The Albatross Task Force (ATF) helped to develop and test a new device, the Rory Line (RL), to be used in conjunction with tori lines, and designed to reduce warp strikes by placing a physical barrier between the scupper (where factory discards are released) and the danger zone (where the trawl warps enter the water) at the stern of the vessel. This study tests the efficacy of the RL at reducing the number of birds drifting into the danger zone and the number of birds being struck by the trawl warps. 2015-01-01T13:07:06Z 2015-01-01T13:07:06Z 2012 Master Thesis Masters MSc http://hdl.handle.net/11427/10902 eng application/pdf Department of Biological Sciences Faculty of Science University of Cape Town |
| spellingShingle | Conservation Biology Rice, Edward Rory lines : silver lining for seabirds in South Africa's demersal trawl fisheries |
| thesis_degree_str | Master's |
| title | Rory lines : silver lining for seabirds in South Africa's demersal trawl fisheries |
| title_full | Rory lines : silver lining for seabirds in South Africa's demersal trawl fisheries |
| title_fullStr | Rory lines : silver lining for seabirds in South Africa's demersal trawl fisheries |
| title_full_unstemmed | Rory lines : silver lining for seabirds in South Africa's demersal trawl fisheries |
| title_short | Rory lines : silver lining for seabirds in South Africa's demersal trawl fisheries |
| title_sort | rory lines silver lining for seabirds in south africa s demersal trawl fisheries |
| topic | Conservation Biology |
| url | http://hdl.handle.net/11427/10902 |
| work_keys_str_mv | AT riceedward rorylinessilverliningforseabirdsinsouthafricasdemersaltrawlfisheries |