Updated SCAA/ASPM assessment of Gulf of Maine Cod

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dc.contributor.authorButterworth, Doug S
dc.contributor.authorRademeyer, Rebecca A
dc.date.accessioned2016-04-21T13:32:28Z
dc.date.available2016-04-21T13:32:28Z
dc.date.issued2008
dc.date.updated2016-04-21T13:31:35Z
dc.description.abstractThe Alt-VPA methodology of Butterworth and Rademeyer (2008a) is applied to updated data for the Gulf of Maine cod population for the period 1982-2006 for which catch-at-age data are available. The fits of the models show a preference for domed over asymptotically flat selectivity. However, the narrow range of estimates of B sp values virtually precludes fits of different stock-recruitment curves from being able to distinguish between options as different as Ricker and Beverton-Holt (from which also very different estimates of Reference Points follow). Because of the clearly high variance that would accompany Reference Points inferred from this analysis, they are not advanced, with a preference for approaches that can accommodate a wider range of data and hence achieve reasonable precision being expressed.en_ZA
dc.identifier.apacitationButterworth, D. S., & Rademeyer, R. A. (2008). <i>Updated SCAA/ASPM assessment of Gulf of Maine Cod</i> University of Cape Town ,Faculty of Science ,Marine Resource Assessment and Management Group. Retrieved from http://hdl.handle.net/11427/19105en_ZA
dc.identifier.chicagocitationButterworth, Doug S, and Rebecca A Rademeyer <i>Updated SCAA/ASPM assessment of Gulf of Maine Cod.</i> University of Cape Town ,Faculty of Science ,Marine Resource Assessment and Management Group, 2008. http://hdl.handle.net/11427/19105en_ZA
dc.identifier.citationButterworth, D. S., & Rademeyer, R. A. (2008). Updated SCAA/ASPM assessment of Gulf of Maine cod. GARM-III Working paper, 4. MARAM: University of Cape Town.en_ZA
dc.identifier.ris TY - Working Paper AU - Butterworth, Doug S AU - Rademeyer, Rebecca A AB - The Alt-VPA methodology of Butterworth and Rademeyer (2008a) is applied to updated data for the Gulf of Maine cod population for the period 1982-2006 for which catch-at-age data are available. The fits of the models show a preference for domed over asymptotically flat selectivity. However, the narrow range of estimates of B sp values virtually precludes fits of different stock-recruitment curves from being able to distinguish between options as different as Ricker and Beverton-Holt (from which also very different estimates of Reference Points follow). Because of the clearly high variance that would accompany Reference Points inferred from this analysis, they are not advanced, with a preference for approaches that can accommodate a wider range of data and hence achieve reasonable precision being expressed. DA - 2008 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2008 T1 - Updated SCAA/ASPM assessment of Gulf of Maine Cod TI - Updated SCAA/ASPM assessment of Gulf of Maine Cod UR - http://hdl.handle.net/11427/19105 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/19105
dc.identifier.vancouvercitationButterworth DS, Rademeyer RA. Updated SCAA/ASPM assessment of Gulf of Maine Cod. 2008 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/19105en_ZA
dc.languageengen_ZA
dc.publisher.departmentMarine Resource Assessment and Management Groupen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.titleUpdated SCAA/ASPM assessment of Gulf of Maine Coden_ZA
dc.typeWorking Paperen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceResearch paperen_ZA
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