these two species but was not confirmed in this study. The extent of resource partitioning 

 by these species in areas of overlap was not studied. 



Sculpin habitat was characterized as run or a combination of run/riffle habitat with 

 some degree of rubble substrate. Sculpins were generally found at sites with gradients 

 from 1-2%. Substrate composition might be an important physical factor influencing 

 sculpin distribution. Addidonal physical, chemical and biological factors most likely 

 influence sculpin density and distribudon warranting further study. 



Species specific stream habitats were indisdnguishable in this study. Qualitative 

 evaluations of stream habitat were used to assess differences between sites. Individual 

 species habitat requirements were similar enough to warrant quantitative measures of a 

 number of physical, chemical, and biological conditions before distinctions can be made for 

 individual species. 



Five torrent sculpin age classes were recorded for a site on Libby Creek. Torrent 

 sculpins do not appear to conform to length/weight regressions. 



Electroshocking in conjunction with D-nets was the best method for sampling sculpin. 

 Alternate sampling methods may be valuable for obtaining additional information. 



