' '^ •. 



able 12 



Estimated numbers and biomass (lbs) o^. "trout in a 4.5 mile 

 section of reach #1 of the Big Hole River in September 1969, 

 1970, 1977 and 1978. Eighty percent (80%) confidence inter- 

 val in parenthesis. 



I t. 



« S' 



September 



-;. ( ■,. Ti 



1969 



l,707(+409)a 



788(+394) 



2,629(+699) 



1970 



1977 



BROWN TROUT-NUMBERS ! 



l,613(+403)^ . l,856(+425)^ 



.- . • RAINBOW TROUT-NUMBERS 



815(+238)^ 344(+130)^ 



[,'-■■'-- ' ^- * ■ ■. I '^ ' 



,.^ '. I BR0V7N TROUT- POUNDS 



2,605(+535) 



a 



2,714(+604) 



RAINBOW TROUT-POUNDS 



6 5 4' 



594{+159) 



401(+152) 



1978 



2,465(+553) 



l,074(+486) 



c 



3,322(+649) 



l,074(+478)^ 



a - 



■■.--■■■: ■ ^} ■■., :-, ■ - .- ■ 



Estimate for trout 10 inches and greater 

 and older) . 



(approximately age 11+ 



b - Estimate for trout 7 inches and greater, 

 c - Estimate for trout age 11+ and older. 





.• * 



o o 



> - - 1 



* :■ 



-% 



45 



