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%).
Reference:
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.
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 University of Cape Town ,Faculty of Science ,Marine Resource Assessment and Management Group. Retrieved from http://hdl.handle.net/11427/18563
Rademeyer, Rebecca A, and Doug S Butterworth Implications of the impacts on CPUE as a result of the introduction of MPAs on hake OMP performance. University of Cape Town ,Faculty of Science ,Marine Resource Assessment and Management Group, 2010. http://hdl.handle.net/11427/18563
Rademeyer RA, Butterworth DS. Implications of the impacts on CPUE as a result of the introduction of MPAs on hake OMP performance. 2010 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/18563
