IKATAN BAY 

 ■CAPE PANKOF 

 CAPE LAZAREF 



UNIMAK BIGHT 

 i-CAPE LUTKE 



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Figure 1. — Area of salmon tagging experiments, south shore of Unimak Island and southwestern shore of Alaska 



Peninsula, 1961. 



METHODS 



The California Rose , a 78-foot purse seiner 

 was chartered to capture salmon for tagging 

 (fig. 2). The boat was originally built as a 

 California tuna clipper, was later used as a 

 Puget Sound salmon seiner, and has recently 

 been converted for winter king crab fishing 

 around Kodiai^ Island. The last conversion 

 included adding of an 8,000-gallon circulating 

 sea-water tank that was ideal for holding cap- 

 tured salmon until they could be tagged. 



The purse seine was originally constructed 

 for salmon fishing on Puget Sound and was 

 much larger than the legal maximum for 

 commercial fishing in the Unimak tagging 

 area. It was tarred cotton with 4-1/2-inch 

 mesh (stretch measure); the circumference 



was approximately 300 fathoms, and the depth, 

 3 3 fathoms. 



The general procedure in making a set is 

 illustrated in figure 3. All sets were blind, 

 that is, there was no visible evidence of 

 salmon when the net was put overboard. The 

 bunt end of the net was pulled off the stern 

 with the seine skiff while the California Rose 

 maintained slow speed headway during the 

 entire set. The seine skiff gradually pulled 

 the net around to port of the seiner, gaging 

 its direction and distance to end on a parallel 

 course with the seiner when the entire net 

 had been pulled off the stern. Each boat then 

 slowly moved ahead, and the net was towed 

 as an open seine for time periods ranging 

 from 30 to 55 minutes. Theoretically, this 

 would intercept migrating fish. Nearly all 



