7739

• UCREFRP Catalog Number: 7739
• Author: Muth, R. T. and T. P. Nesler.
• Title: Associations Among Flow and Temperature Regimes and Spawning Periods and Abundance of Young of Selected Fishes, Lower Yampa River, Colorado, 1980-1984 - Final Report.
• USFW Year: 1993.
• USFW - Doc Type: \
• Copyright Material: NO

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Table 8.-Relative abundance of age-O or older fish, by river reach and over all reaches per year and by reach over all years, for selected
nonnative fIShes collected with seines from backwaters or shoreline habitats with negligible water velocity, lower Yampa River, Colorado. Relative
abundance indices: CPUE = catch-per-unit-effort (number of fISh per 1,000 m2 sampled), and PO = percentage of occurrence (percentage of all
samples, per year and reach, in which fISh in either age class for each species occurred). For age-O fish, only samples coUected on or after estimated
initiation of spawning for each species per year were included in analyses.
River reach-
5 4 3 2 1 Total
A2e0 A2e1+ AEeO AEe 1+ AEeO A2e1+ AEeO AEe1+ MeO A2e1+ AEeO AEe 1+
Year SDCcies CPUE PO CPUE PO CPUE PO CPUE PO CPUE PO CPUE PO CPUE PO CPUE PO CPUE PO CPUE PO CPUE PO CPUE PO
1980 Cyprinella luImuis 10 14 28 86 254 100 8 18 62 70 45 38 90 21 39 36 767 42 84 52 348 41 55 45
Norropis strambteus 175 43 48 86 744 55 20 27 58 54 1 8 63 7 55 14 34 10 9 48 114 23 15 33
Pimephaks promelas 170 14 15 29 2,857 73 18 27 55 31 3 38 20 14 8 14 178 20 9 10 197 28 8 20
Richonlsotlius bolteatUS 130 57 8 29 416 45 4 18 57 31 3 23 38 7 39 14 7 10 59 29 51 16 29 24
1981 C. lutrensis 14 13 69 19 151 45 151 64 2,955 77 203 46 221 28 95 28 1,587 46 338 32 1,151 48 239 32
N. stTamineus 134 33 53 15 528 55 140 36 897 77 93 46 96 19 29 10 36 16 73 12 129 2S 62 15
P. promelas 465 40 84 19 4,843 55 173 45 655 62 103 54 81 17 46 10 145 16 11 9 350 23 36 14
R. balteatUS 21 13 118 44 1,289 73 67 45 62 38 62 23 45 17 32 13 13 10 79 17 74 23 66 20
1982 C. lutrensis 83 100 38 11 1,540 100 59 17 49 100 449 40 75 6 10 6 1,000 33 356 37 729 34 267 27
N. stTamineus 0 0 58 11 1,140 44 12 33 2,189 100 547 40 52 6 161 9 5 9 324 23 118 13 283 20 ~
P. promelas \0
35 22 19 11 16,620 56 77 42 151 80 11 10 16 13 54 13 164 21 88 21 364 23 77 19
R. baltealUS 0 0 39 11 70 56 12 33 3030 11 10 15 8 53 25 4 7 120 27 9 10 98 26
1983 C. lutrensis 16 17 116 50 6 7 48 24 70 35 39 47 25 8 11 9 30 9 55 28 32 11 47 26
N. stramineus 17 17 33 17 350 71 387 71 273 35 74 35 0 0 71 16 68 9 49 17 100 14 73 22
P. promelas 50 17 33 33 188 43 225 35 226 59 70 41 17 15 29 7 123 19 19 12 126 21 37 15
R. baltealUS 17 17 67 33 60 14 225 65 14 12 86 65 6 8 163 33 6 5 95 28 10 7 110 34
1984 C. lutrenSis 20 7 73 29 11 14 67 33 0 0 15 7 19 3 1 1 18 4 4 7
N. stTamineus 10 7 44 14 11 7 170 22 0 0 10 7 2 5 11 5 2 5 14 8
P. promelas 20 7 44 14 10 7 141 33 146 79 31 21 187 47 6 4 181 44 10 9
R. baltealUS 18 21 37 21 10 7 74 17 0 0 26 21 2 4 2 2 2- 6 4 7
1980 C. lutrenSis 31 35 63 31 394 44 68 29 629 46 161 41 82 15 34 15 681 25 167 27
- N. stramineus 82 24 48 24 554 47 121 38 686 48 177 30 42 9 65 11 145 10 93 16
1984 P. promelas 180 27 38 20 4,906 44 107 32 219 44 66 37 56 19 34 11 159 25 27 12
R. bal,ealUS 42 19 58 35 371 39 71 38 35 21 47 30 21 10 63 22 6 7 69 20
-Reach 5 = Cross Mountain Canyon (river km 94.1->89.1), Reach 4 = lower end of Cross Mountain Canyon to Lily Park (river kIn 89.1->81.8),
Reach 3 = Lily Park to Deerlodge Park (river km 81.8-->72.2), Reach 2 = Deerlodge Park 10 Harding Hole (river km 72.2->32.2), Reach 1 =
Harding Hole to Yampa-Green River confluence (river km 32.2-0.0).