116 



Estimates of fisherman days are slightly elevated, since fisherman hours 



were divided by the average hours fished in obtaining pressure in fisherman 



days. 



A statewide fishing pressure survey, conducted by mail during 1975-76, 



indicated the following pressure in fisherman days for Clark Canyon 



Reservoir: 



Fisherman Days 

 Period (80% confidence interval) 



May 1, 1975 - September 30, 1975 30,329 (+4347) 



October 1, 1975 - April 30, 1976 10,258 ( + 460 2) 



40,587 ( + 6331) 



Catch rates ranged from 0.25 to 0.45 in 1971 and 0.19 to 0.36 in 

 1972 for individual time periods. The catch rate/hour was greater for 

 boat fishermen for both 1971 and 1972. 

 Yield 



An estimated 41,000 and 39,000 rainbow trout were harvested in 1971 

 and 1972, respectively. In 1971, 67% of the catch was taken during the 

 five month period between May 17 and October 17. In 1972, 93% of the 

 catch was taken during the seven month period between March 4 and October 

 15. During both years, the catch was comprised almost entirely of two 

 age groups of hatchery rainbow trout. 



