8208

• UCREFRP Catalog Number: 8208
• Author: Osmundson, D. B., P. Nelson, K. Fenton and D. W. Ryden.
• Title: Relationships Between Flow and Rare fish Habitat in the '15-Mile Reach' of the Upper Colorado River.
• USFW Year: 1995.
• USFW - Doc Type: \
• Copyright Material: NO

80
60
40
W 20
U
w 0
-20
-40
-60
............ ...................... .. ............................ ..
N = 5 FISH (26 LOCATIONS)
MEAN +/- 1 SE
MODERATE FLOWS
.............. ...............................................................................
FISH USE DATA :
FLOWS OF 1,378-2,368 CFS (MEAN = 1,893 CFS)
HABITAT AVAILABILITY DATA:
1,240-2,870 CFS (MEAN = 1,818 CFS)
T

GP BA ED PO SR FR RI RA
60
LOW FLOWS
---------------------------------- . .--.......................................---- -----.... ..................
USE DATA:
FLOWS OF 391- 931 CFS (MEAN = 738 CFS)
HABITAT AVAILABILITY DATA:
FLOWS OF 557 AND 810 CFS (MEAN = 683 CFS)
E-
40
Z 20
W
U
Iz
0
Q -20

-40
............................................. . ............. .... ...................... ....... ........... ..........
N = 6 FISH (10 LOCATIONS)
MEAN +/- 1 SE
.................
EE
GP BA ED PO SR FR RI RA
HABITAT TYPE
Figure 15. Summer habitat preference by adult Colorado squawfish using one or more of the four
15-mile reach study sites. Preference is measured by the mean difference between percent habitat
use and percent habitat availability. Difference for a given habitat type is calculated for each fish
and then averaged across all fish. Preferred habitats are those with mean differences greater than
zero. Data and calculations are in Appendix tables IX-XIV.
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