Fisheries Habitat and Fish Populations 



Figure D-4: Relationship between transformed substrate scores and juvenile bull trout 

 densities (number of trout less than 75 mm per 100 m2) for 15 tributary reaches in the 

 Flathead River Basin during 1989 



12 T 



10 - 



Number 



of Bull Trout 



greater than 



75 mm per 



100 meters squared 



4 - 



10 



y = 0.0845433 (Transformed Score) +1.31704 

 p < 0.05, r = 0.54, n= 15 



15 20 25 30 35 

 Transformed Substrate Score 



40 45 



50 



Page 60 



Flathead Basin Cooperative Program Final Report 



