cannot possibly reflect the real-world situation. Working with a model over a 

 period of time increases the likelihood that errors such as these will be found. 



A model is a simplistic interpretation of the system, whether or not this 

 model reflects the response of the real system to the conditions we are testing 

 remains to be seen. It is certain, however, that even a simple system such as 

 this 12-compartment model has complex and unanticipated reactions to harvesting 

 pressure and its variation, due to multiple indirect effects operating along several 

 pathways. It is therefore likely that the response of the real system to 

 harvesting pressure and its variation is even more complicated and difficult to 

 predict. This is the important message for management of the modeling effort 

 at this point. 



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