Fish

1. The texts says that the slope of F(X) determines the behaviour of the population around the carrying capacity. Illustrate (a) a case where the population converges smoothly to the carrying capacity (b) a case where the population overshoots but still converges to the carrying capacity (c) a case where the population reaches a limit cycle around the carrying capacity 2. Why do economists argue that the maximum sustainable yield is not the optimal level of harvest for a fishery? 3. What effect does increasing the discount rate have on the optimal level of harvest.? 4. Use the Gordon-Schaefer model to show the harvest and stock level for an openaccess fishery. 5. Use the Gordon-Schaefer model to show the harvest and stock level for an optimally regulated fishery. 6. Is critical depensation really a serious matter? The reading by M Liermann (2001) may be useful