Table 6. — Number (n) of scales read and percentage (^) of 1. adult red salmon from 

 various Kvichak spawning grounds, 1956-58 



■"■ Number refers to location in figure 1. 



CONCLUSIONS 



The difference in freshwater age com- 

 position between Kvichak River and 

 spawning ground samples is due to diffi- 

 culties in obtaining representative 

 samples and in proper weighting from 

 the spawning grounds. Of the total escape- 

 ment counted in the Kvichak River, only 

 about one -fourth of it could be seen on 

 the spawning grounds. Most of the popu- 

 lation was therefore not available to 

 sampling on the spawning grounds. It is 

 not known whether the missing fish were 



near lake shores, in deep-water spawn- 

 ing areas, or hidden behind glacial water 

 or other natural protection. Then, too, a 

 large portion of the population seen was 

 not sampled because extensive areas and 

 lengthy spawning periods were involved. 



Further, it is widely recognized that 

 there are subpopulations of red salmon 

 within one lake system, and that these 

 subpopulations segregate on the spawn- 

 ing grounds. The fact that various locali- 

 ties in the ELiamna-Clark system showed 

 different age composition is clear evidence 



