Table 26. Summary of electrof ishing survey for a 1,000 foot section of 

 Tenmile Creek (T3N, R12W, Sec 34B) on August 12 and August 21, 

 1980. 



Species No. Captured Length Range (inches) 



Brook Trout ' 221 2.0 - 10.9 



Rainbow Trout 3 4.3-7.7- 



Burbot 1 '8.8 — 



Mottled Sculpin - - ' 



The standing crop of brook trout in the study section was estimated 

 using a mark-recapture method (Table 27). The section supported approximately 

 353 fish representing a biomass of 31 pounds. Catchable fish (6 inches and 

 longer) composed 32 percent of the population. Brook trout condition (length 

 to weight ratio) was the highest of all Mount Haggin streams surveyed and 

 was well above average for other upper Big Hole River tributaries (MDFWP, 

 unpubl ished data ). 



Table 27. Estimated standing crop of brook trout in a 1,000 foot section of 

 Tenmile Creek (T3N, R12W, Sec 34B) on August 12, 1980. Eighty 

 percent confidence intervals are in parentheses. 



Per 1 ,000 ft . 

 Species Length Range (inches) Number Pounds 



Brook Trout 3.0 - 4.9 179 



5.0 - 6.9 117 



7.0 - 10.9 _57 



353(+57) 31+5) 



A 1,000 foot section of Tenmile Creek (T3, R12W, Sec 22) was electrof ished 

 in 1976 (MDFWP unpublished data). Eleven brook trout ranging in size from 4.5 

 to 8.5 inches and 5 cutthroat trout ranging from 6.3 - 3.4 inches were collected 

 during the survey. The study section surveyed during the 1976 inventory was 

 located further upstream than the section that was electrofished in the present 

 study. This may explain the lack of cutthroat trout in the present study section. 

 Cutthroat trout and rainbow X cutthroat hybrid trout are known to occupy the 

 Tenmile lakes at the headwaters of the drainage (MDFWP unpublished data). 



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