Table 20. Summary of electrofishing survey for a 1,000 foot section of 

 Sixmile Creek (T3N, R12W, Sec 25 A) on August 7 and August 26, 

 1980. 



Standing crops of brook and rainbow trout in the study section were 

 estimated using a mark-recapture method (Table 21). The section supported 

 approximately 392 brook trout and 20 rainbow trout representing a combined 

 biomass of 14 pounds. Catchable fish (6 inches and longer) represented 

 9 percent of the brook trout population while 85 percent of the population 

 was less than 5 inches and 66 percent of the population was less than 3 inches 

 in length. Brook trout condition (length to weight ratio) was above average 

 for Mount Haggin streams and other upper Big Hole River tributaries (MDFHP' 

 unpublished data). 



Table 21. Estimated standing crops of brook and rainbow trout in a 1,000 

 foot section of Sixmile Creek (T3N,R12W, Sec 25A) on August 7, 

 1980. Eighty percent confidence intervals are in parentheses. 



Per 1,000 ft. 

 Species Length Group (inches) Number Pounds 



Brook Trout 1.0-2.9 259 



3.0 - 4.9 76 



5.0 - 6.9 34 



7.0 - 9.7 23 



392(+119) 13(+2) 

 Rainbow Trout 3.5 - 7.0 20 



20(+3) l(+0) 



A 150 foot section of Sixmile Creek (T3N, R12W, Sec 24) was electrofished 

 in 1976 (riDFWP unpublished data). Nine brook trout and single specimens of 

 rainbow, cutthroat and rainbow X cutthroat hybrid trout were captured. The 

 fish ranged in size from 2.7 to 8.4 inches in length. The survey rated the 



- 52 - 



