The 2006 age-structured production model assessments and projections for the South Coast rock lobster resource-routine update
| dc.contributor.author | Johnston, Susan J | |
| dc.contributor.author | Butterworth, Doug S | |
| dc.date.accessioned | 2016-04-05T09:56:47Z | |
| dc.date.available | 2016-04-05T09:56:47Z | |
| dc.date.issued | 2006 | |
| dc.date.updated | 2016-04-05T09:55:32Z | |
| dc.description.abstract | The assessment conducted in 2006 has been routinely extended, taking account of a further year’s catch, CPUE and catch-at-age data. CPUE shows a continuation of the increase that commenced in 1998. The sustainable yield estimates are generally very similar to those for the 2005 assessment, although estimates of current biomass levels relative to K increase. The Reference Case (RC) scenario suggests that a TAC of about 360 MT or less would be appropriate to prevent biomass decline in the future. Other scenarios suggest either higher or lower values than this. If the catch-at-age data are down-weighted, then this 360 MT level for the TAC is increased to 390 MT. On the other hand, the scenario which assumes the 1996+ recruitment to be equal to the average of the previous 10 years is more pessimistic and suggests an appropriate TAC level of only some 300 MT or less to prevent biomass decline. | en_ZA |
| dc.identifier.apacitation | Johnston, S. J., & Butterworth, D. S. (2006). <i>The 2006 age-structured production model assessments and projections for the South Coast rock lobster resource-routine update</i> University of Cape Town ,Faculty of Science ,Marine Resource Assessment and Management Group. Retrieved from http://hdl.handle.net/11427/18562 | en_ZA |
| dc.identifier.chicagocitation | Johnston, Susan J, and Doug S Butterworth <i>The 2006 age-structured production model assessments and projections for the South Coast rock lobster resource-routine update.</i> University of Cape Town ,Faculty of Science ,Marine Resource Assessment and Management Group, 2006. http://hdl.handle.net/11427/18562 | en_ZA |
| dc.identifier.citation | Jonhston, S.J. and Butterworth, D.S. (2007).The 2006 age-structured production model assessments and projections for the South Coast rock lobster resource-routine update. WG/06/06/SCL3 | en_ZA |
| dc.identifier.ris | TY - Working Paper AU - Johnston, Susan J AU - Butterworth, Doug S AB - The assessment conducted in 2006 has been routinely extended, taking account of a further year’s catch, CPUE and catch-at-age data. CPUE shows a continuation of the increase that commenced in 1998. The sustainable yield estimates are generally very similar to those for the 2005 assessment, although estimates of current biomass levels relative to K increase. The Reference Case (RC) scenario suggests that a TAC of about 360 MT or less would be appropriate to prevent biomass decline in the future. Other scenarios suggest either higher or lower values than this. If the catch-at-age data are down-weighted, then this 360 MT level for the TAC is increased to 390 MT. On the other hand, the scenario which assumes the 1996+ recruitment to be equal to the average of the previous 10 years is more pessimistic and suggests an appropriate TAC level of only some 300 MT or less to prevent biomass decline. DA - 2006 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2006 T1 - The 2006 age-structured production model assessments and projections for the South Coast rock lobster resource-routine update TI - The 2006 age-structured production model assessments and projections for the South Coast rock lobster resource-routine update UR - http://hdl.handle.net/11427/18562 ER - | en_ZA |
| dc.identifier.uri | http://hdl.handle.net/11427/18562 | |
| dc.identifier.vancouvercitation | Johnston SJ, Butterworth DS. The 2006 age-structured production model assessments and projections for the South Coast rock lobster resource-routine update. 2006 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/18562 | en_ZA |
| dc.language | eng | 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.subject.other | Age Structured assessment | |
| dc.subject.other | South Coast rock lobster | |
| dc.title | The 2006 age-structured production model assessments and projections for the South Coast rock lobster resource-routine update | en_ZA |
| dc.type | Working Paper | en_ZA |
| uct.type.filetype | Text | |
| uct.type.publication | Research | en_ZA |
| uct.type.resource | Research paper | en_ZA |