Updated assessment of the South African kingklip resource including an initial attempt at including catch-at-length data
| dc.contributor.author | Brandão, Anabela | |
| dc.contributor.author | Butterworth, Doug S | |
| dc.date.accessioned | 2016-03-16T07:21:24Z | |
| dc.date.available | 2016-03-16T07:21:24Z | |
| dc.date.issued | 2008 | |
| dc.date.updated | 2016-03-16T07:19:46Z | |
| dc.description.abstract | This paper updates the kingklip assessment by Brandão and Butterworth presented earlier this year by taking further data into account. Further, the analysis which treats the resource on both West and South coasts as a single stock is extended to take catch-at-length data into account. If the resource is treated as two separate stocks, current (2008) depletion of spawning biomass on the West and South coasts is estimated at 0,50 and 0.12 respectively. A more optimistic picture is obtained with the resource treated as a single stock, which yields a current depletion estimate of 0.36, which increases to 0.52 if the catch-at-length data are incorporated. Projections indicate that if the South coast component of the resource is a separate stock, then catches would need to be reduced to below 1 000 tons at least for sustainability. However if the two coasts combined are treated as a single stock, projections under current catch levels suggest a slight decrease for the assessment excluding catch-at-length data, which changes to a slight increase when those catch-at-length data are also taken into account.. | en_ZA |
| dc.identifier.apacitation | Brandão, A., & Butterworth, D. S. (2008). Updated assessment of the South African kingklip resource including an initial attempt at including catch-at-length data. http://hdl.handle.net/11427/17828 | en_ZA |
| dc.identifier.chicagocitation | Brandão, Anabela, and Doug S Butterworth "Updated assessment of the South African kingklip resource including an initial attempt at including catch-at-length data." (2008) http://hdl.handle.net/11427/17828 | en_ZA |
| dc.identifier.citation | Brandão, A., & Butterworth, D. S. (2008). Updated assessment of the South African kingklip resource including an initial attempt at including catch-at-length data. Internal Report MCM/2008/NOV/SWG-DEM: 75. Report for the Deep-water working Group at Marine and Coastal Management, Department of Environmental Affairs and Tourism, Cape Town. | en_ZA |
| dc.identifier.ris | TY - Journal Article AU - Brandão, Anabela AU - Butterworth, Doug S AB - This paper updates the kingklip assessment by Brandão and Butterworth presented earlier this year by taking further data into account. Further, the analysis which treats the resource on both West and South coasts as a single stock is extended to take catch-at-length data into account. If the resource is treated as two separate stocks, current (2008) depletion of spawning biomass on the West and South coasts is estimated at 0,50 and 0.12 respectively. A more optimistic picture is obtained with the resource treated as a single stock, which yields a current depletion estimate of 0.36, which increases to 0.52 if the catch-at-length data are incorporated. Projections indicate that if the South coast component of the resource is a separate stock, then catches would need to be reduced to below 1 000 tons at least for sustainability. However if the two coasts combined are treated as a single stock, projections under current catch levels suggest a slight decrease for the assessment excluding catch-at-length data, which changes to a slight increase when those catch-at-length data are also taken into account.. DA - 2008 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2008 T1 - Updated assessment of the South African kingklip resource including an initial attempt at including catch-at-length data TI - Updated assessment of the South African kingklip resource including an initial attempt at including catch-at-length data UR - http://hdl.handle.net/11427/17828 ER - | en_ZA |
| dc.identifier.uri | http://hdl.handle.net/11427/17828 | |
| dc.identifier.vancouvercitation | Brandão A, Butterworth DS. Updated assessment of the South African kingklip resource including an initial attempt at including catch-at-length data. 2008; http://hdl.handle.net/11427/17828. | en_ZA |
| dc.language | eng | en_ZA |
| dc.publisher | MARAM, University of Cape Town | en_ZA |
| dc.publisher.department | Marine Resource Assessment and Management Group | en_ZA |
| dc.publisher.faculty | Faculty of Science | en_ZA |
| dc.publisher.institution | University of Cape Town | |
| dc.title | Updated assessment of the South African kingklip resource including an initial attempt at including catch-at-length data | en_ZA |
| dc.type | Journal Article | en_ZA |
| uct.type.publication | Research | en_ZA |
| uct.type.resource | Research paper | en_ZA |