The effect of no future surveys on projections under the current OMP for the South African hake resource

The effects of no future surveys on projections under the current OMP for the South African hake resource are investigated by simulation. The implications of an undetected increase in catchability with and without surveys are compared. The results indicate that while surveys cannot entirely correct for bias in the CPUE, they do ameliorate this effect through the OMP, and adequately so for a bias of up to 2% p.a.