TABLE OF CONTEHTS 



Page 



Methods 1 



Hourly movement 3 



Chinook fingerllngs 3 



Chinook yearlings ^ 



Bluebacks 3 



Silvers 5 



Steelheeuls 6 



Discussion of hoiirly movement 6 



Day and night movement 7 



Canparison between 1952 and 1953 7 



Factors affecting movement at Bonneville 7 



Susmary and conclusions 10 



Literature cited 10 



FIGURES 

 Nos. 



1. Location of the fingerllng bypasses and bypass traps at 

 Bonneville Dam 2 



2. Diagrammatic drawing of an auxiliary -water screen pit 

 showing positions of fingerling bypasses and fingerling 



traps 2 



3. Hourly catches of chinook fingerlings in 1952 and 1953* 

 Each hour represents the summation of the year's catch for 



that hour 3 



k. Percent of chinook fingerlings caught each hour during 



four 72-hour periods in 1953 3 



5. Hourly catches of chinook yearlings in 1952 and 1953* 

 Each hour represents the summation of the year's catch 



for that hour 5 



6. Percent of chinook yearlings caught each hour during 



three 72-hour periods in 1953 5 



