Testing time-varying selectivity models of the South Coast rock lobster with data generated by a model with spatial structure
| dc.contributor.author | Furman, Liam B | |
| dc.contributor.author | Butterworth, Doug S | |
| dc.date.accessioned | 2016-03-18T09:27:37Z | |
| dc.date.available | 2016-03-18T09:27:37Z | |
| dc.date.issued | 2011 | |
| dc.date.updated | 2016-03-18T09:26:08Z | |
| dc.description.abstract | Both gear selectivity and availability combine to form selectivity. When selectivity is allowed to change with time, it is difficult to determine the source of the variation. If availability changes with time, perhaps as a consequence of changing spatial distributions of fishing effort, selectivity-at-age will appear to vary over time. It then becomes unclear how to renormlise selectivity so that the catchability q which relates CPUE to underlying abundance does not change. This study uses a model with spatial structure in the age distribution of the population together with changes in the spatial distribution of fishing over time to simulate variations in availability. The model is used to generate data for simulation testing of two different approaches to modeling time-varying selectivity. | en_ZA |
| dc.identifier.apacitation | Furman, L. B., & Butterworth, D. S. (2011). <i>Testing time-varying selectivity models of the South Coast rock lobster with data generated by a model with spatial structure</i> University of Cape Town ,Faculty of Science ,Marine Resource Assessment and Management Group. Retrieved from http://hdl.handle.net/11427/17990 | en_ZA |
| dc.identifier.chicagocitation | Furman, Liam B, and Doug S Butterworth <i>Testing time-varying selectivity models of the South Coast rock lobster with data generated by a model with spatial structure.</i> University of Cape Town ,Faculty of Science ,Marine Resource Assessment and Management Group, 2011. http://hdl.handle.net/11427/17990 | en_ZA |
| dc.identifier.citation | Furman, L. B., & Butterworth, D. S. (2011). Testing time-varying selectivity models of the South Coast rock lobster with data generated by a model with spatial structure. MARAM: University of Cape Town. | en_ZA |
| dc.identifier.ris | TY - Working Paper AU - Furman, Liam B AU - Butterworth, Doug S AB - Both gear selectivity and availability combine to form selectivity. When selectivity is allowed to change with time, it is difficult to determine the source of the variation. If availability changes with time, perhaps as a consequence of changing spatial distributions of fishing effort, selectivity-at-age will appear to vary over time. It then becomes unclear how to renormlise selectivity so that the catchability q which relates CPUE to underlying abundance does not change. This study uses a model with spatial structure in the age distribution of the population together with changes in the spatial distribution of fishing over time to simulate variations in availability. The model is used to generate data for simulation testing of two different approaches to modeling time-varying selectivity. DA - 2011 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2011 T1 - Testing time-varying selectivity models of the South Coast rock lobster with data generated by a model with spatial structure TI - Testing time-varying selectivity models of the South Coast rock lobster with data generated by a model with spatial structure UR - http://hdl.handle.net/11427/17990 ER - | en_ZA |
| dc.identifier.uri | http://hdl.handle.net/11427/17990 | |
| dc.identifier.vancouvercitation | Furman LB, Butterworth DS. Testing time-varying selectivity models of the South Coast rock lobster with data generated by a model with spatial structure. 2011 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/17990 | 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 | Testing time-varying selectivity models of the South Coast rock lobster with data generated by a model with spatial structure | en_ZA |
| dc.type | Working Paper | en_ZA |
| uct.type.publication | Research | en_ZA |
| uct.type.resource | Research paper | en_ZA |