Implications of the impacts on CPUE as a result of the introduction of MPAs on hake OMP performance
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University of Cape Town
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%).
Rademeyer, R.A. & Butterworth, D. S. (2010). Implications of the impacts on CPUE as a result of the introduction of MPAs on hake OMP performance.