Initial applications of statistical catch-at-age assessment methodology to the Greenland halibut resource
| dc.contributor.author | Butterworth, Doug S | |
| dc.contributor.author | Rademeyer, Rebecca A | |
| dc.date.accessioned | 2016-04-18T14:39:46Z | |
| dc.date.available | 2016-04-18T14:39:46Z | |
| dc.date.issued | 2009 | |
| dc.date.updated | 2016-04-18T14:38:32Z | |
| dc.description.abstract | In this initial report of the application of SCAA to the assessment of the Greenland halibut resource, a Baseline case with temporally invariant selectivity-at-age vectors is considered together with four variants which allow for serial correlation in survey residuals, temporal variability in commercial selectivity-at-age, and force asymptotically flat commercial selectivity. Only catch- and survey-based data are taken into account, as for the standard NAFO XSA-based assessment. In terms of recent trends, results vary greatly amongst these variants. Two are similar (though slightly above in absolute terms) to the recent negative prognosis indicated by the XSA assessment. Others however (including what reflects the best fit to the data obtained thus far) suggest more optimistic results, in particular indicating increases in abundance over the last decade. | en_ZA |
| dc.identifier.apacitation | Butterworth, D. S., & Rademeyer, R. A. (2009). <i>Initial applications of statistical catch-at-age assessment methodology to the Greenland halibut resource</i> University of Cape Town ,Faculty of Science ,Marine Resource Assessment and Management Group. Retrieved from http://hdl.handle.net/11427/18944 | en_ZA |
| dc.identifier.chicagocitation | Butterworth, Doug S, and Rebecca A Rademeyer <i>Initial applications of statistical catch-at-age assessment methodology to the Greenland halibut resource.</i> University of Cape Town ,Faculty of Science ,Marine Resource Assessment and Management Group, 2009. http://hdl.handle.net/11427/18944 | en_ZA |
| dc.identifier.citation | Butterworth, D. S., & Rademeyer, R. A. (2009). Initial applications of Statistical Catch-at-Age assessment methodology to the Greenland Halibut resource. MARAM:University of Cape Town. | en_ZA |
| dc.identifier.ris | TY - Working Paper AU - Butterworth, Doug S AU - Rademeyer, Rebecca A AB - In this initial report of the application of SCAA to the assessment of the Greenland halibut resource, a Baseline case with temporally invariant selectivity-at-age vectors is considered together with four variants which allow for serial correlation in survey residuals, temporal variability in commercial selectivity-at-age, and force asymptotically flat commercial selectivity. Only catch- and survey-based data are taken into account, as for the standard NAFO XSA-based assessment. In terms of recent trends, results vary greatly amongst these variants. Two are similar (though slightly above in absolute terms) to the recent negative prognosis indicated by the XSA assessment. Others however (including what reflects the best fit to the data obtained thus far) suggest more optimistic results, in particular indicating increases in abundance over the last decade. DA - 2009 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2009 T1 - Initial applications of statistical catch-at-age assessment methodology to the Greenland halibut resource TI - Initial applications of statistical catch-at-age assessment methodology to the Greenland halibut resource UR - http://hdl.handle.net/11427/18944 ER - | en_ZA |
| dc.identifier.uri | http://hdl.handle.net/11427/18944 | |
| dc.identifier.vancouvercitation | Butterworth DS, Rademeyer RA. Initial applications of statistical catch-at-age assessment methodology to the Greenland halibut resource. 2009 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/18944 | 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 | Initial applications of statistical catch-at-age assessment methodology to the Greenland halibut resource | 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 |