Browsing by Subject "area-disaggregated OMP"

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    Further area-disaggregated OMP results for the west coast rock lobster resource
    (2007) Johnston, Susan J; Butterworth, Doug S
    At the request of the working group, two replacement yield (RY) estimates have been produced, using the area-disaggregated modelling framework. These RY estimates are the commercial TAC which can be taken each year in the future to ensure the total male biomass remains at current levels, i.e. that T Bm (16/06) = 1.0. In addition commercial RY estimates, it is assumed 320 MT will be taken recreationally, and that 500 MT will be taken by poaching. The two RY estimates differ with respect to the assumptions regarding the future somatic growth rate. The first RY is calculated assuming the full range of integrated values of somatic growth – that is a relative ratio of 50:40:10 of low, medium and high future somatic growth rate scenarios to eventuate. The second RY assumes that only the low somatic growth scenario will occur in the future.
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    WCRL area-disaggregated OMP output: task group results
    (2007) Johnston, Susan J; Butterworth, Doug S
    These results are for the “OMP2” presented in WG/04/07/WCRL1. Results have been updated using the “observed” 2005 somatic growth data provided by James Gaylard. (Note: 2005 refers to the 2005/06 season.) The previous program also had an “error” in that it added “noise” to all (1993+) trap and hoop CPUE input data into the OMP, instead of treating the 1993-2004 values as “observed” and only adding noise to the 2005+ generated data. The OMPs presented here are meant to be tuned so that the average commercial TAC over the 10-year period is either 2000 MT, 2200 MT or 2400 MT. Due to lack of time, the current tuning is approximate in these values being 2028 MT, 2244 MT and 2395 MT.