Results 



a) Species Composition 



The Mount Haggin streams supported a relatively diverse composition of 

 fish species for high altitude streams (Table 4). The brook trout (Salvelinus 

 fjontinji^) was the dominant game fish and was present in all 13 streams that 

 were studied. Rainbow trout (S almo gai rdneri ) were common and found in most 

 of the streams. Cutthroat trout (Salmo clarki ) and rainbow-cutthroat hybrid 

 composed the remainder of the trout species collected. Cutthroat trout collec- 

 tions were limited to Willow and Sixmile Creeks. Other game fish that were 

 present included mountain whitefish ( Prosopium williamso ni) and burbot (Lota 

 lota ). Non-game species collected included mottled sculpin (Cottus barrdfTT 

 longnose sucker ( Catostomus catostomus ) and longnose dace ( Rhinichthys cataractae ). 



b) Fish Populations 



The numerical composition of the fish population of each study section 

 is given by species and length range in Appendix Table 2. Sculpins and dace 

 were not counted, nor were any lengths or weights measured, and are merely 

 listed as present in each stream in which they were collected. Data presented 

 in this table clearly indicate that the brook trout is the dominant fish 

 species. Rainbow trout, while present in many of the streams, were captured 

 in low numbers. Cutthroat trout were present in low numbers in the Sixmile 

 Creek section and relatively high numbers in Willow Creek. Mountain whitefish, 

 burbot, longnose suckers and longnose dace were found to be most abundant in 

 larger streams such as Deep, French and California Creeks. Mottled sculpin 

 were common in all of the study sections. 



Estimates of standing crop (numbers and biomass) were calculated for 

 brook, rainbow or cutthroat trout populations where sufficient numbers of 

 these species were captured to insure statistical reliability of the estimate. 

 Estimated standing crops of fish by length group are presented in Appendix 

 Table 3. Some of this data is summarized to include total estimates of 

 trout and individual trout species for each Mount Haggin stream study section 

 in Table 5. Trout populations ranged from a low of 160 per 1,000 feet in 

 California Creek to a high of 740 per 1,000 feet in Willow Creek. 



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