Page 2 4 



14 



N 

 U 

 M 12 



B 



10 



AGE 1 + 



(A) 



6.0 



K 



AGE 11 + 



7.0 



8.0 



9.0 10.0 



LENGTH (IN) 



11.0 



12.0 



13.0 



10 



N 



M 8 



6 



(B) 



-« AGE 1 + 



.* AGE 11+ 



6.0 



70 



8.0 



9.0 10.0 



LENGTH (IN) 



11.0 



12.0 



13.0 



Figure 4. Length-frequency distribution of age 1+ and older Arctic grayling in the upper Big Hole River 



drainage in July (A) and August (B) 1988. Assignment of age classes 1+ and 11+ to the peaks in 

 frequency is based on age-growth information in Liknes (1981). 



