CPUE-based assessments of the Greenland halibut resource using SCAA

 

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dc.contributor.author Butterworth, Doug S
dc.contributor.author Rademeyer, Rebecca A
dc.date.accessioned 2016-04-19T11:40:51Z
dc.date.available 2016-04-19T11:40:51Z
dc.date.issued 2009
dc.identifier.citation Butterworth, D. S., & Rademeyer, R. A. (2009, April). CPUE-based assessments of the Greenland halibut resource using SCAA. In Document submitted to the Vigo meeting (pp. 22-24). MARAM: University of Cape Town. en_ZA
dc.identifier.uri http://hdl.handle.net/11427/18982
dc.description.abstract SCAA is used to assess the Greenland halibut resource as in Butterworth and Rademeyer (2009), but here using CPUE rather than surveys to provide indices of abundance. The approach is essentially that of an ASPM – a standard production model except that agestructure of the commercial catch is also taken into account. A base case (“Baseline CPUE”) is selected which allows variability over time in commercial selectivity-at-age sufficient in extent to eliminate most of the systematic patterns evident if this selectivity is kept temporally invariant. The resultant biomass trends estimated are quite similar to, though slightly steadier than those for the comparative survey-based assessment, with both showing recent increases. This contrasts with the XSA assessment for which the biomass estimates are much lower. en_ZA
dc.language eng en_ZA
dc.title CPUE-based assessments of the Greenland halibut resource using SCAA en_ZA
dc.type Working Paper en_ZA
dc.date.updated 2016-04-19T11:39:52Z
uct.type.publication Research en_ZA
uct.type.resource Research paper 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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