32 



SALMON GEAR LIMITATION 



720 



640 



c 560 



- 480 



400 



Z 320 



240 



160 



80 



Simulated catch 

 Actual catch 



i;l' I; . n i : 



JAS JAS JAS JAS JAS JAS JAS JAS jAS JAS JAS JAS 



Month 



FIG. 



16. Comparison of actual and simulated data for the 1959 

 sockeye run using simulation model No. 1 (see text). 



(See p. 120 for further explanation.) 



described earlier which assumes perfect knowledge of the run at all 

 times. Such variations from actual results were considered to be un- 

 important to the over-all objectives of the study. The model is 

 specifically designed to give accurate estimates of the dynamic be- 

 havior of the catch and the economic sectors of the fishery when 

 the amount of gear available is changed. 



The Economic Sector of the Simulation Model 



In addition to the biological and gear sectors of the simulation 

 model which have already been described, an economic sector for 

 the purse seines, gill nets, and reef nets was included. The economic 

 sector of the model determines the number of days each gear fishes 

 in each area during the season. The total number of days fished during 

 the season for each type of gear is tabulated and multiplied by the 

 average operating cost per day to calculate the total operating ex- 



