The 2004 re-assessment of the South African sardine and anchovy populations to take account of revisions to earlier data and recent record abundances
| dc.contributor.author | De Moor, C | |
| dc.contributor.author | Butterworth, Doug S | |
| dc.date.accessioned | 2017-02-22T11:02:49Z | |
| dc.date.available | 2017-02-22T11:02:49Z | |
| dc.date.issued | 2009 | |
| dc.date.updated | 2016-01-18T08:31:34Z | |
| dc.description.abstract | Hydroacoustic surveys off the coast of South Africa over the early years of the 21st century indicated that both the sardine Sardinops sagax and anchovy Engraulis encrasicolus populations had simultaneously reached record abundances. The South African pelagic fishery is regulated using an Operational Management Procedure (OMP). The OMP in use at that time had been developed using data from the two populations prior to this rapid and substantial increase in abundances. This paper documents the revised assessments that were urgently required to provide a basis to update the OMP. These assessments resulted in a changed perception of the status and productivity of these populations. In particular, estimates of the stock-recruitment relationships and the extent of variation about them, which play a key role in evaluating risk when developing OMPs, altered substantially from estimates derived from earlier assessments. | |
| dc.identifier | http://dx.doi.org/10.2989/AJMS.2009.31.3.6.994 | |
| dc.identifier.apacitation | De Moor, C., & Butterworth, D. S. (2009). The 2004 re-assessment of the South African sardine and anchovy populations to take account of revisions to earlier data and recent record abundances. <i>African Journal of Marine Science</i>, http://hdl.handle.net/11427/23998 | en_ZA |
| dc.identifier.chicagocitation | De Moor, C, and Dough S Butterworth "The 2004 re-assessment of the South African sardine and anchovy populations to take account of revisions to earlier data and recent record abundances." <i>African Journal of Marine Science</i> (2009) http://hdl.handle.net/11427/23998 | en_ZA |
| dc.identifier.citation | De Moor, C. L., & Butterworth, D. S. (2009). The 2004 re-assessment of the South African sardine and anchovy populations to take account of revisions to earlier data and recent record abundances. African Journal of Marine Science, 31(3), 333-348. | |
| dc.identifier.ris | TY - Journal Article AU - De Moor, C AU - Butterworth, Dough S AB - Hydroacoustic surveys off the coast of South Africa over the early years of the 21st century indicated that both the sardine Sardinops sagax and anchovy Engraulis encrasicolus populations had simultaneously reached record abundances. The South African pelagic fishery is regulated using an Operational Management Procedure (OMP). The OMP in use at that time had been developed using data from the two populations prior to this rapid and substantial increase in abundances. This paper documents the revised assessments that were urgently required to provide a basis to update the OMP. These assessments resulted in a changed perception of the status and productivity of these populations. In particular, estimates of the stock-recruitment relationships and the extent of variation about them, which play a key role in evaluating risk when developing OMPs, altered substantially from estimates derived from earlier assessments. DA - 2009 DB - OpenUCT DP - University of Cape Town J1 - African Journal of Marine Science LK - https://open.uct.ac.za PB - University of Cape Town PY - 2009 T1 - The 2004 re-assessment of the South African sardine and anchovy populations to take account of revisions to earlier data and recent record abundances TI - The 2004 re-assessment of the South African sardine and anchovy populations to take account of revisions to earlier data and recent record abundances UR - http://hdl.handle.net/11427/23998 ER - | en_ZA |
| dc.identifier.uri | http://hdl.handle.net/11427/23998 | |
| dc.identifier.vancouvercitation | De Moor C, Butterworth DS. The 2004 re-assessment of the South African sardine and anchovy populations to take account of revisions to earlier data and recent record abundances. African Journal of Marine Science. 2009; http://hdl.handle.net/11427/23998. | en_ZA |
| dc.language.iso | eng | |
| 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.source | African Journal of Marine Science | |
| dc.source.uri | http://www.tandfonline.com/toc/tams20/current | |
| dc.subject.other | anchovy | |
| dc.subject.other | assessment | |
| dc.subject.other | sardine | |
| dc.subject.other | South Africa | |
| dc.subject.other | stock recruitment | |
| dc.title | The 2004 re-assessment of the South African sardine and anchovy populations to take account of revisions to earlier data and recent record abundances | |
| dc.type | Journal Article | en_ZA |
| uct.type.filetype | Text | |
| uct.type.filetype | Image | |
| uct.type.publication | Research | en_ZA |
| uct.type.resource | Article | en_ZA |