An initial attempt at a spatially structured stock assessment for the South African hake resource, including explicit movement
| dc.contributor.author | Rademeyer, Rebecca A | |
| dc.date.accessioned | 2016-04-18T09:05:23Z | |
| dc.date.available | 2016-04-18T09:05:23Z | |
| dc.date.issued | 2013 | |
| dc.date.updated | 2016-03-09T07:38:49Z | |
| dc.description.abstract | The distribution area for the South African hake population is separated into nine regions to accommodate an initial attempt at a model of the dynamics which reflects explicit movement of the two species of hake both longshore and offshore. Commercial selectivities-at-length are modelled by logistic curves to reflect a gear only and no availability effect, but it proves necessary to allow for doming in the survey selectivities-at length. Although most abundance and size structure data are reasonably well fitted by the model, the model tends to overestimate the proportion of hake in the smallest and largest length groups for the surveys. Spawning biomass trends for M. paradoxus and M. capensis are broadly similar to those estimated by the current assessment approach which uses differing selectivity patterns by species and area as a surrogate for movement. Suggestions are made regarding issues for possible further investigation. | en_ZA |
| dc.identifier.apacitation | Rademeyer, R. A. (2013). <i>An initial attempt at a spatially structured stock assessment for the South African hake resource, including explicit movement</i> University of Cape Town ,Faculty of Science ,Marine Resource Assessment and Management Group. Retrieved from http://hdl.handle.net/11427/18919 | en_ZA |
| dc.identifier.chicagocitation | Rademeyer, Rebecca A <i>An initial attempt at a spatially structured stock assessment for the South African hake resource, including explicit movement.</i> University of Cape Town ,Faculty of Science ,Marine Resource Assessment and Management Group, 2013. http://hdl.handle.net/11427/18919 | en_ZA |
| dc.identifier.citation | Rademeyer, R. A. (2014). An initial attempt at a spatially structured stock assessment for the South African hake resource including explicit movement. Document MARAM IWS/DEC14/Hake P, 3, 46pp. | en_ZA |
| dc.identifier.ris | TY - Working Paper AU - Rademeyer, Rebecca A AB - The distribution area for the South African hake population is separated into nine regions to accommodate an initial attempt at a model of the dynamics which reflects explicit movement of the two species of hake both longshore and offshore. Commercial selectivities-at-length are modelled by logistic curves to reflect a gear only and no availability effect, but it proves necessary to allow for doming in the survey selectivities-at length. Although most abundance and size structure data are reasonably well fitted by the model, the model tends to overestimate the proportion of hake in the smallest and largest length groups for the surveys. Spawning biomass trends for M. paradoxus and M. capensis are broadly similar to those estimated by the current assessment approach which uses differing selectivity patterns by species and area as a surrogate for movement. Suggestions are made regarding issues for possible further investigation. DA - 2013 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2013 T1 - An initial attempt at a spatially structured stock assessment for the South African hake resource, including explicit movement TI - An initial attempt at a spatially structured stock assessment for the South African hake resource, including explicit movement UR - http://hdl.handle.net/11427/18919 ER - | en_ZA |
| dc.identifier.uri | http://hdl.handle.net/11427/18919 | |
| dc.identifier.vancouvercitation | Rademeyer RA. An initial attempt at a spatially structured stock assessment for the South African hake resource, including explicit movement. 2013 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/18919 | 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 | An initial attempt at a spatially structured stock assessment for the South African hake resource, including explicit movement | 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 |