7848

• UCREFRP Catalog Number: 7848
• Author: Burdick, B. D.
• Title: Minimum Flow Recommendation For Passage Of Colorado Squawfish And Razorback Sucker In The 2.3-Mile Reach Of The Lower Gunnison River
• USFW Year: 1997.
• USFW - Doc Type: Redlands Diversion Dam To The Colorado River Confluence.
• Copyright Material: NO

Table E.2. Total catch per unit effort (Fish/h) for four sub-adult and adult
native fishes and three sub-adult and adult nonnative fishes
collected with electrofishing at various flows from the 2.2-mile
reach of the Lower Gunnison River, 30 March 1994 to 7 November 1995.
Refer to Appendix; Table A.1. for two-letter species code.
Flow (cfs)
217
363 133
252 59
168 2
42.9 0
2.6 194
478 11
49.4 4
75.3 5
3.9 20
129
651 69
6 112 6.5 0 188 0 2.2 28.2 30
729 .
75 54 3.9 1.3 134 0 10.5 1.3 12
993 107 64.3 2.9 1.4 176 34.3 0 17.1 51
1,263 46.9 57.8 1.6 0
0 106
538 78
8
80 7.8
1.9 0
1.9 86
85
1.444
550
1 127
48.2 156
41 65
8.4 1.2 99 .
27.7 10.8 8.4 47
`
,
1,583 70.8 109 6.6 0.9 188 5.7
0 1.9
5
9 0
1
6 7•
•
11
1,790
806
1 82.5
127 84.1
78 12.7
13.3 1.6
1.7 181
220 83.3 .
3.3 .
0 87
,
1,993 37.5 53.8 8.8 1.3 53
97 20
32
2 7.5
16
9 0
0 28
49
3,231
260
3 49.2
22.1 42.4
65.4 3.4
22.1 1.7
1.9 112 .
49 .
2.9 1.0 53
,
4,896
200
5 444
41.5 369
71.7 164
30.2 0
1.9 977
145 31
30.2 0
20.8 0
0 31
51
,
5,730 31 49 5 0 86
243 42
38 9
12 0
4 51
54
9,390
900
10 32
18.9 171
189 40
71.7 0
0 279 7.5 13.2 0 21
,
11,600 53.5 159 43.7 1.4 258
336 12.7
38 9.9
9
10 0
2
18 23-
67
13.900 42 167 120 7.3 . .
Correlation coefficient ("r") for Catch effort versus flow
Range of Flows
(cfs) Analyzed
217- 1,000 -0.54 0.34 -0.39 0.11 0.41 -0.06 -0.43 0.43 0.54
217- 2.000 -0.53 -0.22 0.01 0.13 0.39 0.21 -0.40 -0.41 0.60
217-13,900 -0.22 0.43 -0.56 0.13 0.24 -0.09 -0.04 0.01 0.29
E-2