Participatory assessment of the South African abalone resource and its impact on predicted population trajectories

 

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dc.contributor.author Edwards, Charles T T
dc.contributor.author Plagányi, Éva E
dc.date.accessioned 2016-01-19T12:15:58Z
dc.date.available 2016-01-19T12:15:58Z
dc.date.issued 2008
dc.identifier.citation Edwards, C. T., & Plaganyi, E. E. (2008). Participatory assessment of the South African abalone resource and its impact on predicted population trajectories: biological modelling. South African Journal of Science, 104(5), 185-191. en_ZA
dc.identifier.uri http://hdl.handle.net/11427/16434
dc.description.abstract Illegal harvesting is a cause for concern in many of the world's fisheries. Over the last decade, the abalone resource in South Africa has come under severe fishing pressure, largely because of increased and unmitigated levels of poaching. The unquantified illegal exploitation of this resource is a major impediment to management, because understanding of abalone population dynamics is affected. Incorrect assessments of population abundance could lead to inadequate attempts by management to stem the decline. Here, population trends along the west coast of South Africa are investigated. A simple discrete-time logistic model was used to estimate parameters within a maximum likelihood statistical framework by fitting to available catch rate data. To address the problem of unknown levels of illegal catch, interview data were collected on non-commercial catch trends and the model was structured to allow this catch to be estimated during the fitting process. The results show that such a participatory approach to stock assessment can lead to an improved understanding of resource dynamics, illustrating the benefit this approach may have for management. en_ZA
dc.language eng en_ZA
dc.publisher Academy of Science of South Africa en_ZA
dc.rights Creative Commons Attribution 4.0 International (CC BY 4.0) *
dc.rights.uri http://creativecommons.org/licenses/by/4.0/ en_ZA
dc.source South African Journal of Science en_ZA
dc.source.uri http://www.assaf.org.za/
dc.title Participatory assessment of the South African abalone resource and its impact on predicted population trajectories en_ZA
dc.type Journal Article en_ZA
dc.date.updated 2016-01-18T09:35:35Z
uct.type.publication Research en_ZA
uct.type.resource Article en_ZA
uct.subject.keywords Participatory assessment en_ZA
uct.subject.keywords South African abalone resource en_ZA
uct.subject.keywords predicted population trajectories en_ZA
dc.publisher.institution University of Cape Town
dc.publisher.faculty Faculty of Science en_ZA
dc.publisher.department Marine Resource Assessment and Management Group en_ZA
uct.type.filetype Text
uct.type.filetype Image


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Creative Commons Attribution 4.0 International (CC BY 4.0) Except where otherwise noted, this item's license is described as Creative Commons Attribution 4.0 International (CC BY 4.0)