The evaluation of fisheries managementa dynamic stochastic approach

Resumo

Most existing studies evaluating the management of fisheries fail to check the goodness of the parameters estimated in reproducing the observed dynamics of the resource. We present an alternative approach: assuming that the stock growth path is affected by productivity shocks that follow a Markov process, we calibrate the growth path of the resource such that the observed dynamics of resource are matched. This approach is applied to two different fishing grounds: the European Anchovy (Division VIII) and the Southern Stock of Hake. In this context, an efficient policy consists of applying a different exploitation rule depending on the state of the resource and the constant-escapement rule is not the efficient policy .