9432 ‎(2)‎

• UCREFRP Catalog Number: 9432
• Author: Modde, T. and M. Fuller.
• Title: Feasibility of Channel Catfish Reduction in the Lower Yampa River.
• USFW Year: 2002.
• USFW - Doc Type: Vernal.
• Copyright Material: NO

Table 1. Comparison of the total number of juvenile and adult fish captured
in the fish trap of the passageway at the Redlands Diversion Dam,
1996 (24 June to 25 October), 1997 (27 March to 24 October), 1998
(16 March to 28 October), 1999 (8 March to 13 October), and 2000 (23
March to 25 October).
Percent of
Number of Fish Total Fish
Common Name 1996 1997 1998 1999 2000 1996 1997 1998 1999 2000
NATIVE FISH
bluehead sucker 3,786 5,029 4,211 4,488 4,499 45.21% 41.10% 55.42% 54.31% 67.53%
flannelmouth sucker 3,486 5,260 2,249 2,378 1,212 41.62% 42.99% 29.60% 28.78% 18.19%
roundtail chub 588 1,235 569 766 412 7.02% 10.09% 7.49% 9.27% 6.18%
Colorado pikeminnow 1 18 23 5 4 0.01% 0.15% 0.30% 0.06% 0.06%
mountain whitefish 0 2 1 2 0 0.00% 0.02% 0.01% 0.02% O.OOX
speckled dace 5 2 1 13 24 0.06% 0.02% 0.01% 0.16% 0.36%
TOTAL 7,871 11,546 7,054 7,652 6,151 93.92% 94.37% 92.84 92.59X 92.33%
NONNATIVE FISH
black bullhead 50 110 52 80 58 0.60% 0.901 0.68% 0.97% 0.87%
bluegill 1 0 0 0 0 0.01% 0.00% 0.01% 0.00% 0.00%
brown trout 17 62 36 50 28 0.20% 0.51% 0.47% 0.61% 0.42%
channel catfish 24 94 157 196 148 0.29% 0.77% 2.07% 2.37% 2.22%
common carp 108 94 94 71 61 1.29% 0.77% 1.24 0.86% 0.92%
grass carp 0 0 0 1 0 0.00% 0.00% 0.00% 0.01% 0.00%
green sunfish 9 32 5 12 47 0.11% 0.26% 0.071 0.15% 0.71%
largemouth bass 1 1 0 0 4 0.011 < 0.01% 0.00% 0.00% 0.06%
rainbow trout 3 15 9 13 4 0.04% 0.12% 0.12% 0.16% 0.06%
smallmouth bass 1 0 0 0 0 O. M 0.001 0.00% 0.001 0.00%
northern pike 1 0 0 1 0 0.011 0.00% O.OOX 0.01% 0.00%
longnose sucker 0 0 0 0 1 0.00% 0.00% 0.00% 0.00% 0.02%
white sucker 189 253 102 81 70 2.261 2.07% 1.36% 0.98% 1.05%
TOTAL 404 661 455 505 421 4.82% 5.40% 6.01% 6.12% 6.32%
HYBRID FISHES
bluehead sucker X
flannelmouth sucker 14 1 6 2 5 0.17% < 0.01% 0.08% 0.02% 0.08%
bluehead sucker X
white sucker 46 12 32 41 50 0.551 0.01% 0.421 0.50% 0.87%
flannelmouth sucker X
white sucker 40 13 42 64 27 0.48% 0.12% 0.64% 0.77% 0.41%
TOTAL
------------------------ 100
---
- 28 80 107 90 1.19% 0.231 1.15% 1.29% 1.351

ALL TOTALS --
-
8,375 --------
12,233 --------
7,589 --------
8,264 --------
6,662 -----------------
100.001 100.00% --------
100.00% --------
100.00% --------
100.001
1996-2000, respectively. The flannelmouth sucker was the second most abundant
fish collected. This fish accounted for 41.6, 43.0, 29.6, 28.8, and 18.2% during
the same period (Table 1). Numerically, the next most common fishes found in the
fish trap were the native roundtail chub and nonnative white sucker, channel
catfish, common carp, and black bullhead (Table 1).
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