22 



SALMON GEAR LIMITATION 



Canadan 

 Catch 



U. S. 



Catch 



Canadian 

 Catch 



Outer Straits Aiea 

 4 days through 

 809& Can. side 



(.917) 



San Juan 



Pt. Roberts Area 

 3 days through 



98^oU.S. side 



U S. 

 Catch 



Inner Sound Area 

 10 days through 



.05) 



Froser Areo 

 13 days through 



Ca n . 

 Catch 



U S 



Catch 



FIG. 1 1 . Schematic outline of biological and gear sectors of sim- 

 ulation program for pink salmon. 



through Johnstone Strait is vitally important to the management 

 of the United States sockeye and pink salmon fisheries. Under the 

 international treaty arrangement, the Canadian and United States 

 catch of pink and sockeye salmon in convention waters must be 

 balanced. Therefore, a large northern entry into the Fraser neces- 

 sitates that a high proportion of the runs moving through the Strait 

 of Juan de Fuca must be harvested by the United States fleet because 

 the northern fish are only available to Canadian gear. The fish 

 entering from the north are also subjected to an intensive Canadian 

 fishery in the Canadian nonconvention waters in the Johnstone 

 Strait, but this catch is not considered in balancing the United 

 States-Canadian catches. Usually, less than 5 per cent of the sockeye 

 run (the percentage value used in our model) use the northern entry. 

 However, it is known that in at least one recent year about 20 per 

 cent used the northern entry. 



