Land Use 



Both sculpin species field identified in this study, slimy and 

 torrent, were present at sites in which grazing, logging, roads, 

 and channel structures occurred in varying degrees of magnitude 

 within the watershed. Mining activity was the least frequently 

 encountered land use in the study area. Both species were found 

 at sites downstream of hardrock mines. Torrent sculpin were also 

 found at urbanized sites. Essentially there was no site found, 

 or surveyed, which hadn't been subjected to human induced 

 disturbances . 



Age Classification 



Age classifications were not attempted in this investigation. 

 However, age classifications were determined from a sample of 

 torrent sculpin electroshocked in Libby Creek on October 18, 1991 

 (see Gangemi, 1992) . 



Sampling Methodology 



The electroshocker, in combination with the D-net were placed 

 directly downstream of the electroshocker. Sculpin immobilized, 

 or partially stunned, or attempting to escape the electrical 

 field were often directed by water flow and subsequently netted. 

 Occasionally checking the D-net yielded a sculpin via the "blind 

 grab." Despite the fact that sculpin were typically capable of 

 eluding the electrical field, this technique proved to be the 

 most effective means of sampling. 



Minnow traps were ineffective in catching sculpin. The traps 

 were placed at various lakes within the study area. No sculpin 

 were found within the traps during any sampling interval from 24 

 to 3 6 hours (Appendix D) . 



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