Evaluation of the Status of the Namibian Hake Resource (Merluccius spp.) Using Statistical Catch-at-Age Analysis
dc.contributor.author | Kirchner, Carola | |
dc.contributor.author | Kainge, Paul | |
dc.contributor.author | Kathena, Johannes | |
dc.coverage.spatial | Namibia | en |
dc.date.accessioned | 2013-10-30T13:29:01Z | |
dc.date.available | 2013-10-30T13:29:01Z | |
dc.date.issued | 2012 | en |
dc.identifier.citation | Environment for Development., p. 1-56 | en |
dc.identifier.uri | http://hdl.handle.net/1834/5166 | |
dc.description.abstract | Namibian 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.iso | en | en |
dc.publisher | University of Cape Town | en |
dc.relation.ispartofseries | EfD DP 12-12 | en |
dc.relation.uri | www.efdinitiative.org | en |
dc.rights.uri | http://creativecommons.org/licenses/by-nc/3.0/ | en |
dc.title | Evaluation of the Status of the Namibian Hake Resource (Merluccius spp.) Using Statistical Catch-at-Age Analysis | en |
dc.type | Book Section | * |
dc.bibliographicCitation.endpage | 52 | en |
dc.bibliographicCitation.stpage | 1 | en |
dc.bibliographicCitation.title | Environment for Development. | en |
dc.description.notes | The 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.status | Published | en |
dc.description.other | Statistical catch-at-age analysis, | en |
dc.description.other | Data | en |
dc.description.other | management monitor graph, | en |
dc.description.other | Namibian hake | en |
dc.description.other | Stock assessment. | en |
dc.description.other | Seal Scat Data | en |
dc.description.other | Estimation of Mean Length of Fish | en |
dc.description.other | Survey Abundance Data | en |
dc.description.other | Total Catch and Catches-at-Age | en |
dc.description.other | CPUE Abundance Data | en |
dc.description.other | Spawner-Biomass Recruitment Relationship | en |
dc.description.other | Benguela system | en |
dc.description.other | Gonosomatic study, | en |
dc.publisher.place | Capetown, South Africa | en |
dc.relation.ispartofseriesnr | 1 | en |
dc.relation.references | Kirchner,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.asfa | Stock assessment | en |
dc.subject.asfa | Gadoid fisheries | en |
dc.subject.asfa | Data | en |
dc.subject.asfa | Dynamics | en |
dc.subject.asfa | Surveys | en |
dc.subject.asfa | Commercial species | en |
dc.subject.asfa | Total allowable catch | en |
dc.subject.asfa | Biomass | en |
dc.subject.asfa | Trawls | en |
dc.subject.asfa | Otoliths | en |
dc.subject.asfa | Fishing mortality | en |
dc.subject.asfa | Fisheries management | en |
dc.subject.asfa | Reproductive system | en |
dc.type.refereed | Non-Refereed | en |
refterms.dateFOA | 2021-01-30T18:47:40Z |