TABLE 6. — Number and percent of sockeye salmon (large) counted over each fish 



ladder. Rock Island Dam, 1959 



TABLE 7. — Number and percent of sockeye salmon (small) counted over each fish 



ladder. Rock Island Dam, 1959 



Steelhead Trout, Salmo gairdnen gairdneri 



The steelhead count of 4,138 in 1959 

 was higher than those of the preceding 

 4 years, and is well above the 26-year 

 mean of 2,900 (table 2). 



Additional data pertaining to steel- 

 head daily counts are contained in 

 tables 8-12. 



Maximum day's count in 1959 was 141 

 on August 26 (table 3). 



Table 14 shows semimonthly totals 

 of number and percentage of steel- 

 head which ascended each fish lad- 

 der. 



