(section B) and in the west channel of the Big Hole River below 

 Wisdom (section C) . Rainbow trout were very rare throughout the 



Table 2. Total number and relative abundance of Arctic Grayling 

 and brook trout captured by electrof ishing in the Big 

 Hole River drainage, June 21 - August 28, 1989. 



Number captured (number/1000 ft of stream) * 



Arctic grayling 



brook trout 



Stream/ 

 section 



YOY 



<9 in 



>9 in 



YOY 



<6 in >6 in 



Swamp Creek: 



A: 0(0) 

 B: 14(1.4) 



Big Hole River: 



C: 100(5.4) 



0(0) 0(0) 

 9(0.9) 0(0) 



D: 

 E: 



F: 



G: 



H: 

 Steel Creek: 



I: 6(0.8) 

 Irrigation Ditch: 



J: 10(10.0) 



9(0.5) 8(0.4) 



0(0) 3(0.1) 



0(0) 0(0) 



3(0.6) 0(0) 



495(33.1) 39(2.6) 5(0.3) 



0(0) 1(.06) 0(0) 



11(0.4) 

 0(0) 

 6(1.1) 



3(0.4) 0(0) 



0(0) 0(0) 



0(0)** 17(1.6) 61(5.8) 

 100(9.9) 17(1.7) 181(18.0) 



2(0.1) 

 3(0.1) 

 0(0) 

 0(0) 

 109(7.3) 

 4(0.3) 



1(.05) 124(6.7) 

 1(.04) 58(2.2) 



0(0) 

 0(0) 

 7(0.5) 

 0(0) 



200(27.3) 0(0) 



0(0) 



0(0) 



11(0.4) 

 5(0.9) 



67(4.5) 

 9(0.6) 



5(0.7) 



1(1.0) 



* = Several sections were sampled more than once, see Table 1. 

 ** = Sampled prior to the time when YOY brook trout were large 



enough to be vulnerable to our collection methods. 

 Note: Number per pass would not be appropriate because passes 

 varied with respect to intensity, method, and duration. 



13 



