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.1. 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 plunge pool
(RM 3.0) of the Redlands Diversion Dam in the Lower Gunnison River,
30 March 1994 to 7 November 1995. Refer to Appendix; A.I. for two-
letter species code.
Total Catch Effort Fish/h
Flow (cfs)
-
BH
FM Native
RT Fishes
CS Nonnative Fishes
Combined CP WS CC Combined
89
185 86
163 13.6
68
3 63.6
2
4 13.6
7
3 177 95.5 0 4.5 100

217
363
110 .
35 .
27 .
3.8 293
175 43.9
48
1 2.4
1
9 7.3
5
8 54

651
168
25
108
83
95
56
21
392 .
137 .
0 .
13 56
150

729
993
46.4
32.1
14.3 0
0 164
93 56
64
3 5.6
3
6 0
0
61

1,263 20.8
13
0 29.2
69
6 4.2
0 0 54 .
58.3 .
0 0 58

1,444
1
550 .
139 .
118
186 0
4 83
446 174
53 0
14
3 0
4 174
,
1.583 25.8
77 142
107 71
60 0
0 239 25.8 .
9.7 0 11
11
1,790
1,806 6.9
82
5 34.5
45 34.5 0 243
76 0
9 3.3
'4 0 3
41
1.993 .
8.7 13 22.5
8.7 5
0 155
30 75 5 0 80
3,231
3,260 0
79 64.7
117 0 0 65 0
23.5 4.3
5.9 0
0 4
29

4,896
411
194 63
126 4.2
2.9 263
734 142
42
9 0 0 142

5,200
5
730
226
92
291
131
0
649 .
83 11.4
14.3 2.9
0 57

97
,
9,390 174 158
185 54
43.6 0
2
6 304
405 62.5
92 8.3 0 71

10,900
11,600

165
211

153
56

165 .

0

482

17.6 7.7

0 0

5.9 10
0
24

13,900
210
162 0
162 0
0 267
533 0
105 16.7 0
17
4.8 0 110
-------------------
Correlation coefficien -
t Cr")
for Catch
effort
versus flow _____ __
Range of Flows
(cfs) Analyzed
89- 1,000
89- 2,000 -0.74
-0.53 -0.05 -0.33 -0
-0
03 0
04 .62 0.40 -0.21 0.21 -0 .65 0.40

89-13,900
0.50 .
0.49 .
.0
0.38 .0 .57
.33 0.55
0
35 -0.36
0
09 0.45 -0 .50 0.55
. -
. 0.35 -0 .36 0.35
E-1