was calculated that 960,900 eggs were 

 secured from the 331 females entering 

 the pond. From the 140 females entering 

 the pond in 1961, 429,700 eggs were 

 obtained. 



11. Of the 552 fish entering the Carson con- 

 crete holding pond in 1960, 46 (or 5.7 

 percent) died in the pond or trap, spawned 

 in the pond, had diseased ovaries, or were 

 killed in error during spawning operations. 

 Of the 609 fish entering the Carson con- 

 crete holding pond in 1961, similar losses 

 amounted to 59 (9.7 percent). 



12. In 1960, 1,020,300 eggs were collected 

 from adults returning to the hatchery, 

 and from these eggs 872,700 fingerlings 

 were released in the spring of 1962. In 

 1961, 429,700 eggs were collected, and 

 the resulting fingerlings will be released 

 in the spring of 1963. 



13. Infection with acid-fast bacteria of adults 

 hauled from Bonneville Dam has varied 

 from 13.2 percent in 1957 to 0.2 percent 

 in 1961. 



14. Infection with acid-fast bacteria of adults 

 returning to Carson hatchery has varied 



from 8.1 percent in 1960 to 0.0 percent in 

 1959. Included in the examination were 

 fish transferred from Carson hatchery. 



15. In 1960, full-time counting at Shipperd 

 Falls fishway was initiated, and 854 spring 

 Chinook salmon were recorded. In 1961, 

 1,032 were counted through the fishway 

 facilities. 



16. Spawning ground surveys have shown that 

 many of the fish returning to Wind River 

 are spawning naturally upstream and 

 downstream from the hatchery. 



ACKNOWLEDGMENTS 



Bruce B. Cannady, assistant regional super- 

 visor. Branch of Hatcheries, Donald F. Cairns 

 and Robert J. McElrath, hatchery managers, 

 and Charles Woods, assistant hatchery man- 

 ager. Bureau of Sport Fisheries and Wildlife, 

 cooperated in all phases of the study. Harlan E. 

 Johnson, resident biologist, and his assistant, 

 Richard G. Bigej, Little White Salmon National 

 Fish Hatchery, contributed information re- 

 garding incidence and treatment of diseases of 

 the spring chinook salmon handled at Carson 

 hatchery. 



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