An Evaluation of Fish Community Structure and Habitat Potential for CO Squawfish and Razorback Sucker

• Description: Upper Colorado River Endangered Fish
• State: CO
• State: UT
• State: WY
• Basin: Yampa/White/Green
• Water Division: 6
• Date: 3/1/1997
• Author: Richard M. Anderson, Colorado River Recovery Implementation Program
• Title: An Evaluation of Fish Community Structure and Habitat Potential for CO Squawfish and Razorback Sucker
• Water Supply Pro - Doc Type: Report/Study

LIST OF TABLES
Table 1. Period of record and flow parameters for Glenwood, Debeque and Cameo gages on the
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Colorado River ...................... ..............................2
Table 2.
Gaged flow and estimated natural flow at Cameo for the water year 1992.. .....
11
Table 3.
Density or percentage of habitat types for three river segments: Rifle to
Parachute (27 kilometers), Parachute to Debeque Canyon (31 kilometers), and
Debeque Canyon to Highline Dam (16 kilometers) ........................
16
Table 4.
Pool area during the base flow period for three river segments: Rifle to Parachute
(27 kilometers), Parachute to Debeque Canyon (31 kilometers), and Debeque
Canyon to Highline Dam (16 kilometers) . ..............................
18
Table 5.
Mean lengths in mm, (coefficient of variation & standard errors) for total catch
of fish collected in 1994 and 1995 . .... ...............................
21
Table 6.
Mean fish length ( >120 mm) for Parachute and Debeque, 1994 and 1995. ......
22
Table 7.
Percent of fish larger and smaller than 300 mm for Parachute and Debeque in both
1994 and 1995 ...................................................
23
Table 8.
Species estimates (95% C.I.) for fish collected in Parachute and Debeque in 1994
and1995 . ......................... .............................24
Table 9.
Percent width of 95% C.1 to estimate. (n)= number of fish over 150 mm. ......
25
Table 10.
Percent of fish recaptured outside the subsection of release ..................
26
Table 11.
Number of fish per kilometer at Parachute, 9.0 km (5.6 mile) and Debeque, 5.8
km (3.6 mile) in 1994, and 9.3 km (5.8 mile) in 1995 . .....................
27
Table 12.
Biomass estimates for Parachute and Debeque in Kg/Ha (percent) for 1994 &
1995....* .......................... .............................30
Table 13.
Biomass (Kg/Ha) for fish smaller and larger than 300 mm ...................
30
Table 14.
Species composition ( %) for fish (over 150 mm) used in the population estimates
at Parachute and Debeque Canyon, Colorado River . ......................
31
Table 15.
Species composition ( %) of all fish collected during electrofishing in 1994 and
1995 in the Colorado River . ......... ...............................
32
Table 16.
Species composition for spring backwaters sampled in June 1994 .............
36
Table 17.
Species composition for summer backwaters sampled in July and August 1993...
37
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