Report on an investigation of reasons for differences between outputs from ASPM and ADAPT-VPA assessments of the Gulf of Maine cod stock
| dc.contributor.author | Butterworth, Doug S | |
| dc.contributor.author | Rademeyer, Rebecca A | |
| dc.contributor.author | Plagányi, Éva E | |
| dc.date.accessioned | 2016-04-22T11:04:33Z | |
| dc.date.available | 2016-04-22T11:04:33Z | |
| dc.date.issued | 2005 | |
| dc.date.updated | 2016-04-22T11:02:52Z | |
| dc.description.abstract | The application of ADAPT-VPA and ASPM assessment methods to the same data set for the Gulf of Maine cod stock allows two primary reasons for earlier differences in assessment results from these two approaches to be identified: • the longer period of data which the ASPM method is able to take into account; and • decreasing selectivity at larger ages estimated by the ASPM approach, in contrast to the flat selectivity assumed by the ADAPT-VPA application of Mayo et al. (2002). Arguments are presented that the ASPM approach (with specific details of an application still to be discussed) should be preferred over ADAPT-VPA as the basis for management recommendations for this resource. Since the ASPM assessments consistently indicate the resource status to be appreciably better relative to the MSY biomass, this has important implications for what might constitute appropriate management measures at present. | en_ZA |
| dc.identifier.apacitation | Butterworth, D. S., Rademeyer, R. A., & Plagányi, É. E. (2005). <i>Report on an investigation of reasons for differences between outputs from ASPM and ADAPT-VPA assessments of the Gulf of Maine cod stock</i> University of Cape Town ,Faculty of Science ,Marine Resource Assessment and Management Group. Retrieved from http://hdl.handle.net/11427/19118 | en_ZA |
| dc.identifier.chicagocitation | Butterworth, Doug S, Rebecca A Rademeyer, and Éva E Plagányi <i>Report on an investigation of reasons for differences between outputs from ASPM and ADAPT-VPA assessments of the Gulf of Maine cod stock.</i> University of Cape Town ,Faculty of Science ,Marine Resource Assessment and Management Group, 2005. http://hdl.handle.net/11427/19118 | en_ZA |
| dc.identifier.citation | Butterworth, D. S., Rademeyer, R. A., & Plagányi, É. E. (2005). Report on an investigation of reasons for differences between outputs from ASPM and ADAPT-VPA assessments of the Gulf of Maine cod stock. | en_ZA |
| dc.identifier.ris | TY - Working Paper AU - Butterworth, Doug S AU - Rademeyer, Rebecca A AU - Plagányi, Éva E AB - The application of ADAPT-VPA and ASPM assessment methods to the same data set for the Gulf of Maine cod stock allows two primary reasons for earlier differences in assessment results from these two approaches to be identified: • the longer period of data which the ASPM method is able to take into account; and • decreasing selectivity at larger ages estimated by the ASPM approach, in contrast to the flat selectivity assumed by the ADAPT-VPA application of Mayo et al. (2002). Arguments are presented that the ASPM approach (with specific details of an application still to be discussed) should be preferred over ADAPT-VPA as the basis for management recommendations for this resource. Since the ASPM assessments consistently indicate the resource status to be appreciably better relative to the MSY biomass, this has important implications for what might constitute appropriate management measures at present. DA - 2005 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2005 T1 - Report on an investigation of reasons for differences between outputs from ASPM and ADAPT-VPA assessments of the Gulf of Maine cod stock TI - Report on an investigation of reasons for differences between outputs from ASPM and ADAPT-VPA assessments of the Gulf of Maine cod stock UR - http://hdl.handle.net/11427/19118 ER - | en_ZA |
| dc.identifier.uri | http://hdl.handle.net/11427/19118 | |
| dc.identifier.vancouvercitation | Butterworth DS, Rademeyer RA, Plagányi ÉE. Report on an investigation of reasons for differences between outputs from ASPM and ADAPT-VPA assessments of the Gulf of Maine cod stock. 2005 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/19118 | 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 | ASPM | |
| dc.subject.other | ADAPT-VPA | |
| dc.subject.other | Gulf of Maine cod stock | |
| dc.title | Report on an investigation of reasons for differences between outputs from ASPM and ADAPT-VPA assessments of the Gulf of Maine cod stock | en_ZA |
| dc.type | Working Paper | en_ZA |
| uct.type.filetype | Text | |
| uct.type.publication | Research | en_ZA |
| uct.type.resource | Discussion paper | en_ZA |