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dc.contributor.authorKirchner, Carola
dc.contributor.authorKainge, Paul
dc.contributor.authorKathena, Johannes
dc.coverage.spatialNamibiaen
dc.date.accessioned2013-10-30T13:29:01Z
dc.date.available2013-10-30T13:29:01Z
dc.date.issued2012en
dc.identifier.citationEnvironment for Development., p. 1-56en
dc.identifier.urihttp://hdl.handle.net/1834/5166
dc.description.abstractNamibian hake is the most important fish resource in Namibia. This monograph is a compilation of all the hake data, historic and recent, that has been used to inform stock assessment and management since the late 1970s. It presents the statistical catch-at-age analysis used to evaluate the state of the Namibian hake resource under different assumptions. This analysis treats the two hakes, Merluccius paradoxus and M. capensis, as a single stock. The data and modeling show that the stock has not as yet recovered to its maximum sustainable yield level, despite foreign fishing effort having been removed in 1990. Best estimates suggest the current stock to be roughly 20% of pre-exploitation levels; however this figure is sensitive to model assumptions. Signs indicate that the stock is slowly recovering from its all-time low in 2002-2004. Because the two hake species are pooled for assessment, the resource is currently managed on a relatively simple adaptive basis; 80% of the estimated replacement yield is reserved for fishing, the remainder being left for rebuilding.en
dc.language.isoenen
dc.publisherUniversity of Cape Townen
dc.relation.ispartofseriesEfD DP 12-12en
dc.relation.uriwww.efdinitiative.orgen
dc.rights.urihttp://creativecommons.org/licenses/by-nc/3.0/en
dc.titleEvaluation of the Status of the Namibian Hake Resource (Merluccius spp.) Using Statistical Catch-at-Age Analysisen
dc.typeBook Section*
dc.bibliographicCitation.endpage52en
dc.bibliographicCitation.stpage1en
dc.bibliographicCitation.titleEnvironment for Development.en
dc.description.notesThe Environment for Development (EfD) initiative is an environmental economics program focused on international research collaboration, policy advice, and academic training. It supports centers in Central America, China, Ethiopia, Kenya, South Africa, and Tanzania, in partnership with the Environmental Economics Unit at the University of Gothenburg in Sweden and Resources for the Future in Washington, DC. Financial support for the program is provided by the Swedish International Development Cooperation Agency (Sida). Read more about the program at www.efdinitiative.org or contact info@efdinitiative.org.en
dc.description.statusPublisheden
dc.description.otherStatistical catch-at-age analysis,en
dc.description.otherDataen
dc.description.othermanagement monitor graph,en
dc.description.otherNamibian hakeen
dc.description.otherStock assessment.en
dc.description.otherSeal Scat Dataen
dc.description.otherEstimation of Mean Length of Fishen
dc.description.otherSurvey Abundance Dataen
dc.description.otherTotal Catch and Catches-at-Ageen
dc.description.otherCPUE Abundance Dataen
dc.description.otherSpawner-Biomass Recruitment Relationshipen
dc.description.otherBenguela systemen
dc.description.otherGonosomatic study,en
dc.publisher.placeCapetown, South Africaen
dc.relation.ispartofseriesnr1en
dc.relation.referencesKirchner,C., Kainge,P., and Kathena, J. (2012).Evaluation of the Status of the Namibian Hake Resource (Merluccius spp.) Using Statistical Catch-at-Age Analysis.en
dc.subject.asfaStock assessmenten
dc.subject.asfaGadoid fisheriesen
dc.subject.asfaDataen
dc.subject.asfaDynamicsen
dc.subject.asfaSurveysen
dc.subject.asfaCommercial speciesen
dc.subject.asfaTotal allowable catchen
dc.subject.asfaBiomassen
dc.subject.asfaTrawlsen
dc.subject.asfaOtolithsen
dc.subject.asfaFishing mortalityen
dc.subject.asfaFisheries managementen
dc.subject.asfaReproductive systemen
dc.type.refereedNon-Refereeden
refterms.dateFOA2021-01-30T18:47:40Z


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