Browsing by Author "Johnston, S"

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    Trends in policing effort and the number of confiscations for West Coast rock lobster
    (MARAM, University of Cape Town, 2011) Brandão, Anabela; Johnston, S; Butterworth, Doug S
    To obtain overall annual rates of increase in number of confiscations and in policing effort in a manner that takes into account possible monthly effects and in the case of policing effort, the fact that various types of policing exercises are carried out, Generalized Linear Models (GLMs) are applied to these data, as summarised in Table 1.
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    Trends in policing effort and the number of confiscations for West Coast rock lobster on a super-area basis
    (2011) Brandão, Anabela; Johnston, S; Butterworth, Doug S
    The same procedure as in Brandão et al. (2011) to obtain overall annual rates of increase in number of confiscations (plus abandonments) and in policing effort is repeated in this paper but with the data disaggregated by super-area. These disaggregated data are reported in the Appendix. The number of confiscations allocated to Super-area 1+2 are very sparse rendering the result from the GLM analyses meaningless. Some of the policing indices for this Super-area also had too few data and could not be sensibly be included in the GLM. Given these problems, no results are presented for this region.
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    Updated trends in policing effort and the number of confiscations for West Coast rock lobster
    (2013) Brandão, Anabela; Johnston, S; Butterworth, Doug S
    To obtain overall annual rates of increase in number of confiscations (which throughout this paper include abandonments) and in policing effort in a manner that takes into account possible monthly effects and, in the case of policing effort, the fact that various types of policing exercises are carried out, Generalised Linear Models (GLMs) were applied to these data (either aggregated or disaggregated by Super-area) by Brandão et al. (2011a, b and c). In this paper, the analyses of Brandão et al. (2011b and c) on a Super-area basis are updated to include further data now available. These disaggregated data are reported in the Appendix.