Re-analysis of the island closure experiment results to implement the suggestions of the December 2020 International Panel

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dc.contributor.authorRoss-Gillespie, Andrea
dc.contributor.authorButterworth, Doug
dc.date.accessioned2021-07-29T15:10:07Z
dc.date.available2021-07-29T15:10:07Z
dc.date.issued2021
dc.description.abstractThe suggestions of the December 2020 International Panel for further analysis of the results from the island closure experiment, in particular to use the same data within a common framework to facilitate comparisons, and to include month as a covariate, are implemented for all response variables except chick survival. Broadly, the results indicate that aggregated and disaggregated approaches give the same results for estimates and variances of the island closure effect (see Figure 2). This is especially a consequence of implementing the disaggregated approach with a nesting structure as advocated by the Panel, which is shown to be statistically justified. Inclusion of the month co-variate does impact results to some extent, the more so for foraging data for the west coast islands (see Figure 3). The sensitivities investigated generally make little difference to results; these checks include extensions to incorporate data prior to 2008. As to be expected, REML based estimates of CIs are somewhat wider than those based on MLE.en_US
dc.identifier.apacitationRoss-Gillespie, A., & Butterworth, D. (2021). <i>Re-analysis of the island closure experiment results to implement the suggestions of the December 2020 International Panel</i> ,Faculty of Science ,Department of Mathematics and Applied Mathematics. Retrieved from http://hdl.handle.net/11427/33665en_ZA
dc.identifier.chicagocitationRoss-Gillespie, Andrea, and Doug Butterworth <i>Re-analysis of the island closure experiment results to implement the suggestions of the December 2020 International Panel.</i> ,Faculty of Science ,Department of Mathematics and Applied Mathematics, 2021. http://hdl.handle.net/11427/33665en_ZA
dc.identifier.citationRoss-Gillespie, A. & Butterworth, D. 2021. <i>Re-analysis of the island closure experiment results to implement the suggestions of the December 2020 International Panel</i>. ,Faculty of Science ,Department of Mathematics and Applied Mathematics. http://hdl.handle.net/11427/33665 .en_ZA
dc.identifier.ris TY - Report AU - Ross-Gillespie, Andrea AU - Butterworth, Doug AB - The suggestions of the December 2020 International Panel for further analysis of the results from the island closure experiment, in particular to use the same data within a common framework to facilitate comparisons, and to include month as a covariate, are implemented for all response variables except chick survival. Broadly, the results indicate that aggregated and disaggregated approaches give the same results for estimates and variances of the island closure effect (see Figure 2). This is especially a consequence of implementing the disaggregated approach with a nesting structure as advocated by the Panel, which is shown to be statistically justified. Inclusion of the month co-variate does impact results to some extent, the more so for foraging data for the west coast islands (see Figure 3). The sensitivities investigated generally make little difference to results; these checks include extensions to incorporate data prior to 2008. As to be expected, REML based estimates of CIs are somewhat wider than those based on MLE. DA - 2021 DB - OpenUCT DP - University of Cape Town KW - penguin KW - island closure KW - fishing impact KW - month KW - GLM standardisation LK - https://open.uct.ac.za PY - 2021 T1 - Re-analysis of the island closure experiment results to implement the suggestions of the December 2020 International Panel TI - Re-analysis of the island closure experiment results to implement the suggestions of the December 2020 International Panel UR - http://hdl.handle.net/11427/33665 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/33665
dc.identifier.vancouvercitationRoss-Gillespie A, Butterworth D. Re-analysis of the island closure experiment results to implement the suggestions of the December 2020 International Panel. 2021 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/33665en_ZA
dc.publisher.departmentDepartment of Mathematics and Applied Mathematicsen_US
dc.publisher.facultyFaculty of Scienceen_US
dc.subjectpenguin
dc.subjectisland closure
dc.subjectfishing impact
dc.subjectmonth
dc.subjectGLM standardisation
dc.titleRe-analysis of the island closure experiment results to implement the suggestions of the December 2020 International Panelen_US
dc.typeReporten_US
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