TABLE 17. 



52 



Relationship between tag returns of brown and rainbow trout by anglers 

 and mean April through September flows (cfs) for the Hildreth Section of 

 the Beaverhead River. Number of tag returns in parenthesis. 



Period 



% Return - f 



Mean Flow 

 April - September 



1967, March - 1968, March 



1968, March - 1968, October 



1970, March - 1971, March 



1973, October - 1974, October 



1974, March -1974, December 

 1972, March -1973, March 



1971, March -1972, March 



7.7 (28) 

 2.2 ( 4) 



6.5 (23) 

 5.0 (17) 

 4.0 (16) 



13.6 (35) 



5.6 (29) 



312 

 481 

 647 

 679 

 679 

 749 

 847 



1 / «, _ No. of angler tag returns during period , QQ 

 — ° No. of new fish tagged at start of period x 



TABLE 18. Mean weights (lbs) by age groups of brown and rainbow trout captured by 

 electrofishing in the Hildreth Section of the Beaverhead River during 

 the 1966 through 1976 sampling periods. 



