WAHLE and CHANEY: ESTABLISHMENT OF NONINDIGENOUS RUNS OF SALMON 



Zimmer et al. (1963) reported on adult mortalities 

 resulting from trapping and hauling operations. 

 During 1955-63 a total of 4,239 adult spring 

 chinook salmon were trapped at Bonneville Dam 

 and hauled to Carson Hatchery. Table 1 displays 

 trapping and related details for each year of 

 that period. 



Hatchery Operations 



The adult spring chinook salmon trapped at 

 Bonneville Dam in the spring of each year during 

 1955-63 were held in adult holding ponds at 

 Carson Hatchery (Figure 5) until sexually mature 

 and ready for spawning in late August and early 

 September. Eggs taken were fertilized and incu- 

 bated and the resulting juveniles reared for about 

 13 mo in hatchery raceways. Zimmer et al. (1963) 



provided details on hatchery facilities, water sup- 

 ply, fish cultural operations, disease, and diets. 



During the 1955-63 transplantation program, 

 about 8.5 million eggs were taken from adult 

 female spring chinook salmon trapped at Bonne- 

 ville Dam. In 1960-63, an additional 5.3 million 

 eggs were taken from adult female spring chinook 

 salmon returning to the hatchery as the result of 

 releases of the progeny of the transplanted fish. 

 Total juvenile releases at the hatchery from the 

 1955-63 brood years was about 10.6 million year- 

 lings (Table 2). 



EVALUATION OF THE RESULTS OF 

 THE PROGRAM 



Adult fish counts at Shipperd Falls fishway, 

 returns to Carson National Fish Hatchery and 



Table l. — Adult spring chinook salmon trapped at Bonneville Dam and transferred to Carson National Fish Hatchery, 1955-63. 



' Includes jacks, 



^Washington shore fishway only. 



Figure 5. — Carson National Fish Hatchery. 



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