Table 10. — Fingerling releases, adult returns, eggs collected, and calculated total eggs 

 available. Wind River, Washington, 1955-61. 



■■■ Based on sex ratio of fish returning to Carson National Fish Hatchery and assuming no 

 mortalities prior to natural spawning. 



^ Total eggs calculated at 3,500 per female. 



^ Does not include an estimated 59,500 eggs secured from 17 females transferred from 

 Little White Salmon National Fish Hatchery in August 1960. 



SUMMARY 



The 10-year scheduled Wind River, Wash., 

 spring Chinook salmon transplantation 

 study began in 1955, and the scheduled 

 completion date for hauling adults from 

 Bonneville Dam is 1965. 



have varied from 31.3 percent in 1956 to 

 15.4 percent in 1960. 



Quantity of water through the dirt holding 

 pond has varied from 11 to 19 c.f.s. Best 

 results have been obtained using a flow of 

 approximately 14 c.f.s. 



2. In the period 1955-61, 3,221 adult spring 

 Chinook salmon have been transferred 

 from Bonneville Dam to Carson National 

 Fish Hatchery at Carson, Wash. 



Water temperatures in the dirt holding 

 pond have ranged from a minimum of 

 39° F. in 1957 and 1958 to a maximum of 

 61° F. in 1957. 



3. In the period 1955-61, total mortalities 

 directly attributed to the trapping and 

 hauling operations have been seven fish. 

 Mortalities recorded were only those fish 

 that were dead on arrival at the hatchery. 



4. Of the fish hauled from Bonneville Dam 

 and held in the dirt pond, losses have varied 

 from 30.2 percent in 1957 to 6.8 percent 

 in 1961. 



5. In the period 1955-61, 6,900,600 eggs were 

 collected from adults hauled from Bonne- 

 ville Dam, and losses by brood year from 

 green egg stage to release as fingerlings 



10. 



Period of holding adult spring chinook 

 salmon in the dirt pond at Carson hatchery 

 has varied from 139 days in 1956 to 191 

 days in 1957. 



In period 1955-61, 4,206,100 fingerlings, 

 resulting from artificial spawning of adults 

 hauled from Bonneville Dam, have been 

 released in Wind River. 



In 1959, 1960, and 1961, 107, 552, and 609 

 fish, respectively, entered Carson con- 

 crete holding ponds. Of the 107 entering 

 the pond in 1959, 2 were females, both of 

 which died prior to spawning. In 1960, it 



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