sculpin are present, slimy sculpin were generally located in the 

 headwater reaches upstream of the torrent sculpin. Habitat 

 factors influencing this longitudinal segregation of slimy and 

 torrent sculpin were not identified. 



Physical. Biological and Human Influences on Sculpin Distribution 



Habitat Typ e 



Habitat types were separated into four categories; pools, runs, 

 riffles and cascades. Distinguishing the point at which a run 

 becomes a riffle was somewhat subjective (see methods) but there 

 appeared to be a preferred location within these four categories 

 by the two sculpin species. 



Sculpin, in general, were predominantly found in riffles, and to 

 a lesser degree, in the areas of overlap between runs and riffles 

 (Figure 4) . Slimy sculpin were found in riffles 80% of the time 

 compared to 13% in run/glide. Torrent sculpin were located 48% 

 of the time in riffle habitat compared to 39% in run/riffle/glide 

 habitat. Few sculpin species were found in pool habitat 

 although sampling intensity was more extensive in riffle and 

 run/riffle/glide habitat segments since this was where sculpin 

 were most abundant. 



11 



