Data/hora: 09/06/2024 04:40:10

Provedor de dados: | Ocean Docs: e-repository of  publications
País: | Belgium
Título: | Evaluation of the Status of the Namibian Hake Resource (Merluccius spp.) Using Statistical Catch-at-Age Analysis
Autores: | Kirchner, Carola; Kainge, Paul; Kathena, Johannes.
Data: | 2013-10-30
Ano: | 2012
Palavras-chave: | Stock assessment; Gadoid fisheries; Data; Dynamics; Surveys; Commercial species; Total allowable catch; Biomass; Trawls; Otoliths; Fishing mortality; Fisheries management; Reproductive system.
Resumo: | 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.
Tipo: | Book Section
Idioma: | Inglês

Identificador:

Environment for Development., p. 1-56

http://hdl.handle.net/1834/5166

Editor:

University of Cape Town

Capetown, South Africa

Relação:

EfD DP 12-12

www.efdinitiative.org

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.

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Fonte: | http://creativecommons.org/licenses/by-nc/3.0/