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Define Future challenges of management of renewable resources?
In response to past shortcomings in a few fisheries management, and to dealing with other conservation goals, the concepts of marine reserves, areas without fishing, have been planned, and are currently being implemented. The simplest analyses of this approach (e.g., Hastings and Botsford, 1999 and Botsford et al., 2001), based once again fundamental ideas from calculus and also from the use of integro-difference equations, demonstrated how to compute sustainable yields under a specific set of assumptions and how to ascertain sustainability of a population for very specific assumptions about the life history.
Though, these are analyses which are still very simple and make a number of certain assumptions, and really should only serve as examples of important principles. A more realistic understanding of the spatial management of renewable resources (Sanchirico and Wilen; 1999, 2001) needs an integration of economic and biological approaches in a spatial context, an inclusion of variability, and an examination of a large number of types of fisheries that have not been covered by the models previously analyzed. Moreover, because fishery 'organisms' typically have dispersal phases where there are complex interactions between biology and the physical movement of water (which denotes a substantial mathematical and computational challenge on its own), there is much room for enhanced understanding of this important issue. Predictions will, of course, depend on good estimates of current biological conditions and population sizes, so further developments of statistical approaches will as well be essential.
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