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MARAM_IWS_DEC10_H_P3.pdf (1.49 MB)

Implications of the Impacts on CPUE as a Result of the Introduction of MPAs on Hake OMP Performance

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posted on 2024-06-10, 07:59 authored by Rebecca A Rademeyer, Doug ButterworthDoug Butterworth

The possible effects of the introduction of MPAs on hake CPUE, and hence on the performance of the hake OMP, is examined for a number of scenarios. The impact is modeled as a change in catchability q whose existence and magnitude is unknown to the manager. Retuning the OMP to adjust for this could necessitate lowering annual TACs for the next five years by some 15-20 thousand tons to maintain the same levels of risk for the M. paradoxus population. Naturally this magnitude depends on the size of the change in q assumed (here some 20%).

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Department of Mathematics and Applied Mathematics, University of Cape Town