8158

• UCREFRP Catalog Number: 8158
• Author: Osmundson, D. B.
• Title: Longitudinal Variation in Fish Community Structure and Water Temperature in the Upper Colorado River; Final Report.
• USFW Year: 1999.
• USFW - Doc Type: Grand Junction, Colorado.
• Copyright Material: NO

2
1.6
1.2
0.8
J 0.4
W
.? 0
E 2
CD
U. 1.6
1.2
0.8
0.4
0
3 PERIODS COMBINED
All fish 100-300 mm TL
excluding ictalunds------------------------------------------------------------------ ;...
------------ --------------------------------------------------------------------- ---------------------------------------------------------------------------------------- ----------------
mean +/-1 SE
---------------------------------------------------------------------------------------------------- -
------------------------------------------------------------------------------------------------------------------------------
1 2 3 4 5 6 7 8 9 10 11 GU
Figure 3. Overall electrofishing catch rates of fishes that might serve as forage for adult
Colorado pikeminnow (i.e., those 100-300 mm long, excluding ictalurids) by study strata,
three sampling periods combined. Upper grapph depicts the mean total catch rate of all fish
groups combined (error bars represent +/- 1 SE); lower graph provides mean catch rates by
fish group. Catches and shocking times for each sample (specific reach-bank) were summed
from fall 1994, spring 1995 and fall 1995 before deternumng mean for each strata.
10
1 2 3 4 5 6 7 8 9 10 11 GU
Stratum