An approach to determine the extinction risk of exploited populations

We propose a method for assessing the persistence of species where the resource is harvested. Four sustainability measures are employed, namely a population measure, a harvest measure, a profitability measure and a catchability measure. These are used to assess the sustainability of two natural resources representing terrestrial and aquatic species, namely White Rhino (Ceratotherium simum) and South African abalone (Haliotis Midae) species,...