Table 5. The Index of Relative Importance (IRI) and its 

 components for the 10 most important food items in the stomachs 

 of brook trout in the Big Hole River, Montana, June 18 to August 

 25, 1990. 



* Total includes identified and unidentified fishes. 

 ** Terrestrial includes Hymenoptera, Diptera (non-aquatic) , 

 Arachnida, and Homoptera. 



18 



