The application of a generalized linear mixed model to the Area 8+ trapboat data

 

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dc.contributor.author Glazer, Jean Patricia
dc.contributor.author Butterworth, Doug S
dc.date.accessioned 2016-03-31T08:19:06Z
dc.date.available 2016-03-31T08:19:06Z
dc.date.issued 2011
dc.identifier.citation Glazer, J.P., & Butterworth, D.S. (2011). The application of a generalized linear mixed model to the Area 8+ trapboat data. en_ZA
dc.identifier.uri http://hdl.handle.net/11427/18432
dc.description.abstract Two papers by Glazer and Butterworth (2011a, 2011b) were recently submitted to the West Coast Rock Lobster Scientific Working Group meeting for consideration. The first of those included sub-area as an explanatory variable in a Generalized Linear Mixed Model (GLMM) applied to standardize the Area 8 trapboat CPUE data. The second paper incorporated data from Area 8+ (rather than data from Area 8 only as used in the past) in the standard Generalized Linear Model (GLM) applied to those data. It was agreed at the meeting that the analyses presented in the aforementioned papers be amalgamated by conducting a GLMM on the Area 8+ data, which incorporates sub-area as an explanatory variable in the model. The results of such an analysis are presented in this paper. It should be noted that Area 8+ for trapboat fishing comprises data from Areas 8, 10 and 11. No trapboat fishing takes place in the area East of Hangklip (Areas 12-14) and a procedure has therefore been adopted to adjust the standardized index to allow for the movement of lobster into the East of Hangklip area over a period of time (1987-1995). The index obtained above is then extended back to 1985 by scaling the pre- 1992 indices from the model applied in the past to standardize the Area 8 CPUE data, so that they can be incorporated with the GLMM-based index. en_ZA
dc.language eng en_ZA
dc.subject.other generalized linear mixed model
dc.subject.other trapboat data
dc.title The application of a generalized linear mixed model to the Area 8+ trapboat data en_ZA
dc.type Working Paper en_ZA
dc.date.updated 2016-03-31T08:15:58Z
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


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