CPUE-based assessments of the Greenland halibut resource using SCAA
| dc.contributor.author | Butterworth, Doug S | |
| dc.contributor.author | Rademeyer, Rebecca A | |
| dc.date.accessioned | 2016-04-19T11:40:51Z | |
| dc.date.available | 2016-04-19T11:40:51Z | |
| dc.date.issued | 2009 | |
| dc.date.updated | 2016-04-19T11:39:52Z | |
| dc.description.abstract | SCAA is used to assess the Greenland halibut resource as in Butterworth and Rademeyer (2009), but here using CPUE rather than surveys to provide indices of abundance. The approach is essentially that of an ASPM – a standard production model except that agestructure of the commercial catch is also taken into account. A base case (“Baseline CPUE”) is selected which allows variability over time in commercial selectivity-at-age sufficient in extent to eliminate most of the systematic patterns evident if this selectivity is kept temporally invariant. The resultant biomass trends estimated are quite similar to, though slightly steadier than those for the comparative survey-based assessment, with both showing recent increases. This contrasts with the XSA assessment for which the biomass estimates are much lower. | en_ZA |
| dc.identifier.apacitation | Butterworth, D. S., & Rademeyer, R. A. (2009). <i>CPUE-based assessments of the Greenland halibut resource using SCAA</i> University of Cape Town ,Faculty of Science ,Marine Resource Assessment and Management Group. Retrieved from http://hdl.handle.net/11427/18982 | en_ZA |
| dc.identifier.chicagocitation | Butterworth, Doug S, and Rebecca A Rademeyer <i>CPUE-based assessments of the Greenland halibut resource using SCAA.</i> University of Cape Town ,Faculty of Science ,Marine Resource Assessment and Management Group, 2009. http://hdl.handle.net/11427/18982 | en_ZA |
| dc.identifier.citation | Butterworth, D. S., & Rademeyer, R. A. (2009, April). CPUE-based assessments of the Greenland halibut resource using SCAA. In Document submitted to the Vigo meeting (pp. 22-24). MARAM: University of Cape Town. | en_ZA |
| dc.identifier.ris | TY - Working Paper AU - Butterworth, Doug S AU - Rademeyer, Rebecca A AB - SCAA is used to assess the Greenland halibut resource as in Butterworth and Rademeyer (2009), but here using CPUE rather than surveys to provide indices of abundance. The approach is essentially that of an ASPM – a standard production model except that agestructure of the commercial catch is also taken into account. A base case (“Baseline CPUE”) is selected which allows variability over time in commercial selectivity-at-age sufficient in extent to eliminate most of the systematic patterns evident if this selectivity is kept temporally invariant. The resultant biomass trends estimated are quite similar to, though slightly steadier than those for the comparative survey-based assessment, with both showing recent increases. This contrasts with the XSA assessment for which the biomass estimates are much lower. DA - 2009 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2009 T1 - CPUE-based assessments of the Greenland halibut resource using SCAA TI - CPUE-based assessments of the Greenland halibut resource using SCAA UR - http://hdl.handle.net/11427/18982 ER - | en_ZA |
| dc.identifier.uri | http://hdl.handle.net/11427/18982 | |
| dc.identifier.vancouvercitation | Butterworth DS, Rademeyer RA. CPUE-based assessments of the Greenland halibut resource using SCAA. 2009 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/18982 | 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.title | CPUE-based assessments of the Greenland halibut resource using SCAA | en_ZA |
| dc.type | Working Paper | en_ZA |
| uct.type.filetype | Text | |
| uct.type.filetype | Image | |
| uct.type.publication | Research | en_ZA |
| uct.type.resource | Research paper | en_ZA |