Results for an illustrative empirical decisison rule for hake projections for C3 scenarios in the context of alternative options for initial TAC reduction levels

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dc.contributor.authorRademeyer, Rebecca A
dc.contributor.authorPlagányi, Éva E
dc.contributor.authorButterworth, Doug S
dc.date.accessioned2016-03-14T09:47:50Z
dc.date.available2016-03-14T09:47:50Z
dc.date.issued2005
dc.date.updated2016-03-14T09:45:41Z
dc.description.abstractThis paper reports further investigations of the performance of an illustrative EMPIRICAL decision rule (OMP) for the hake resource for C3 scenarios only because these reflect (on average) a current spawning biomass ratio for M. capensis compared to M. paradoxus of about 2:1, which is considered more plausible than the much higher corresponding ratios for the C1 and C2 scenarios. Initial annual reductions of 5000, 8000 and 10000 tons are considered for the first two years. After that initial period, TAC changes are restricted to a maximum of 5%, both up and down. Results for the C6 scenarios (C6 corresponds to C3 in the same way as C4 to C1 – reflecting a greater proportion of M. capensis in past offshore trawl catches) show a reduction of about 15000t in the annual TAC for similar final depletion statistics (the lower 5%ile being of primary importance as risk is the concern here) for M. paradoxus.en_ZA
dc.identifier.apacitationRademeyer, R. A., Plagányi, É. E., & Butterworth, D. S. (2005). <i>Results for an illustrative empirical decisison rule for hake projections for C3 scenarios in the context of alternative options for initial TAC reduction levels</i> University of Cape Town ,Faculty of Science ,Marine Resource Assessment and Management Group. Retrieved from http://hdl.handle.net/11427/17759en_ZA
dc.identifier.chicagocitationRademeyer, Rebecca A, Éva E Plagányi, and Doug S Butterworth <i>Results for an illustrative empirical decisison rule for hake projections for C3 scenarios in the context of alternative options for initial TAC reduction levels.</i> University of Cape Town ,Faculty of Science ,Marine Resource Assessment and Management Group, 2005. http://hdl.handle.net/11427/17759en_ZA
dc.identifier.citationRademeyer, R.A, Plaganyi, E.E & Butterworth, D.S. (2005). Results for an illustrative empirical decisison rule for hake projections for C3 scenarios in the context of alternative options for initial TAC reduction levels.en_ZA
dc.identifier.ris TY - Working Paper AU - Rademeyer, Rebecca A AU - Plagányi, Éva E AU - Butterworth, Doug S AB - This paper reports further investigations of the performance of an illustrative EMPIRICAL decision rule (OMP) for the hake resource for C3 scenarios only because these reflect (on average) a current spawning biomass ratio for M. capensis compared to M. paradoxus of about 2:1, which is considered more plausible than the much higher corresponding ratios for the C1 and C2 scenarios. Initial annual reductions of 5000, 8000 and 10000 tons are considered for the first two years. After that initial period, TAC changes are restricted to a maximum of 5%, both up and down. Results for the C6 scenarios (C6 corresponds to C3 in the same way as C4 to C1 – reflecting a greater proportion of M. capensis in past offshore trawl catches) show a reduction of about 15000t in the annual TAC for similar final depletion statistics (the lower 5%ile being of primary importance as risk is the concern here) for M. paradoxus. DA - 2005 DB - OpenUCT DP - University of Cape Town KW - Hake projections KW - empirical decision KW - C3 Scenarios KW - TAC reduction LK - https://open.uct.ac.za PB - University of Cape Town PY - 2005 T1 - Results for an illustrative empirical decisison rule for hake projections for C3 scenarios in the context of alternative options for initial TAC reduction levels TI - Results for an illustrative empirical decisison rule for hake projections for C3 scenarios in the context of alternative options for initial TAC reduction levels UR - http://hdl.handle.net/11427/17759 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/17759
dc.identifier.vancouvercitationRademeyer RA, Plagányi ÉE, Butterworth DS. Results for an illustrative empirical decisison rule for hake projections for C3 scenarios in the context of alternative options for initial TAC reduction levels. 2005 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/17759en_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.subjectHake projections
dc.subjectempirical decision
dc.subjectC3 Scenarios
dc.subjectTAC reduction
dc.titleResults for an illustrative empirical decisison rule for hake projections for C3 scenarios in the context of alternative options for initial TAC reduction levelsen_ZA
dc.typeWorking Paperen_ZA
uct.type.publicationResearchen_ZA
uct.type.resourceResearch paperen_ZA
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