15 



Table 2. Unweighted mean values for habitat and trout population variables in 

 urban (U) and control (C) stations of study streams. Values of p are 

 from Mann-Whitney U tests. 



Variable 



Station 

 type 



Bozeman 



Creek 

 (n=9U,9C) 



Mathew 



Bird 

 Creek 

 (n=4U,3C) 



Figgins Fleshman 

 Creek Creek 

 (n=lU,lC) (n=2U,lC) 



Habitat Variables 



Channel U 

 width (m) C 



4.84 



7.01 



(p<.001) 



2.31 

 2.34 

 (ns) 



1.40 

 1.58 



2.15 

 1.73 



3.65 



5.24 



(p=.047) 



Solid over- U 

 head cover (%) 



0.91 



5.32 



(p<.002) 



9.24 



17.53 



(ns) 



30.42 

 13.33 



3.94 

 2.84 



5.22 



8.33 



{p=.025) 



Pool, turbu- U 

 lence cover (%) C 



7.13 

 4.78 

 (ns) 



8.52 

 7-21 

 (ns) 



0.50 

 5.47 



7.38 

 6.38 



7.09 



5.46 



(p=.377) 



Eroding 

 banks (%) 



32.85 



19.07 



(ns) 



24.01 

 1.95 

 (ns) 



12.65 

 9.00 



70.3 

 126.0 



33.8 

 22.6 

 (p=.101) 



Water 



velocity 



(cm/sec) 



79.5 

 77.2 

 (ns) 



43.5 

 22.9 

 (p<.02) 



12.2 

 12.2 



32.6 

 26.0 



60.4 

 57.3 

 (p=.790) 



NO -N 

 (m|/l) 



0.420 

 0.371 

 (ns) 



0.612 

 0.338 



0.325 

 0.338 



0.414 

 0.429 



0.393 



0.431 



(p=.822) 



Trout Variables 



Number of Trout 20 cm and Larger 



Per stream km U 323 188 64 



C 523 79 241 



(p<.02) (ns) 



244 

 376 

 (p=.154) 



Per stream ha U 673 827 456 

 C 754 346 1524 

 (ns) (ns) 



421 

 483 



666 

 702 

 (p=.984) 



Kilograms of All Trout 



