A bio-economic application to the Cape Rock Lobster resource using a delay difference modelling approach
CITATION: Roos, E. 2004. A bio-economic application to the Cape Rock Lobster resource using a delay difference modelling approach. ORiON, 20(1):7-28, doi:10.5784/20-1-4.
The original publication is available at http://orion.journals.ac.za
In many species, like the Cape Rock Lobster (Jasus lalandii), the life cycles of males and females differ. This may motivate the use of two-sex models in a stock-assessment analysis. It is also true for this resource, that juveniles do not reach sexual maturity immediately. Therefore a delay-difference model is appropriate. In this study we follow a bio-economic approach and use a two-sex delay-difference model to determine a maximum economic yield strategy. Thus we determine an economic optimum steady state solution at which to harvest this resource subject to the biological constraints of the species.