Table 1. — Annual counts of adult fall Chinook salmon 



(jacks included), Bonneville Dam, I938-60. 



i/ 



ij At Bonneville Dsun male Chinook salmon 16-I8 inches in length 

 are considered as jack salmon. 



(tables 2 and 4), * Numbers given include fish 

 handled at hatcheries and fish spawning 

 naturally in hatchery streams. Annual counts 

 at Bonneville Dam and returns to hatcheries 

 are shown in figure 2. Annual returns as per- 

 cent of Bonneville count are given in figure 3. 

 In the same period (1945-60), approximately 

 1,070 million eggs were collected and 

 572,988,000 young fish were released as unfed 

 fry or as fingerlings into Bonneville Dam pool 



* Data obtained from unpublished material furnished by 

 Fish Commission of Oregon and Washington Department 

 of Fisheries and from Columbia Fisheries Program 

 Office Report of Activities. 1959-60. 



area (tables 4 and 5). Annual releases cover- 

 ing period 1944-56 and returns of 4-year-old 

 fish (1948-60) are shown in table 3 and figure 

 4. Only fish released at these hatcheries and 

 in Bonneville Dam pool area are represented 

 in tabulations (tables 3 and 5). In some years, 

 due to lack of adequate facilities, large quan- 

 tities of eggs and fish were transferred out- 

 side Bonneville Dam pool area. Limited num- 

 bers of fish and eggs were provided for 

 research studies being conducted in Columbia 

 Basin and are not included. Figure 5 

 shows a typical spawn-taking opera- 

 tion. 



