7761

• UCREFRP Catalog Number: 7761
• Author: Ryden, D. W. and F. Pfeifer.
• Title: San Juan River Recovery Implementation Program Annual Research Report.
• USFW Year: 1994.
• USFW - Doc Type: \
• Copyright Material: NO

Table 3. Total number of fish collected in standardized electrofishing collections in 1993.
Total
number of Percent Frequency of
specimens of total Rank occurrence
Species(Status) 1993 91-93 1993 91-93 1993 91-93 1993 91-93
flannelmouth sucker(N) 14,215 65,983 64.7 61.7 1 1 436 1,668
common carp(I) 1,538 8,735 7.0 8.2 4 4 324 1,308
channel catfish(I) 1,760 11 ,645 8.0 10.9 3 3 325 1,421
bluehead sucker(N) 2,814 13,147 12.8 12.3 2 2 311 1,415
speckled dace(N) 931 4,342 4.2 4.1 5 5 236 974
red shiner(I) 509 2,299 2.3 2.2 6 6 153 550
bluehead X flannelmouth(H) 30 135 0.1 0.1 8 8 26 112
fathead minnow(I) 120 481 0.5 0.4 7 7 52 153
Colorado squawfish(N)8 1(5) 13(15) c 14 13 1 11
...... green sunfish(I) 3 34 12 9 3 25
0 brown trout(I) 17 33 9 10 13 29
roundtail chub(N)b 0(2) 6(7) 0 6 6
rainbow trout(I) 8 15 10 12 7 14
smallmouth bass(I) 0 7 0 14 7
largemouth bass (I) 7 23 11 11 4 17
unidentified(?) 0 3 0 17 3
black bullhead(I) 2 4 13 16 2 4
mottled sculpin(N) 3 4 12 16 3 4
white sucker(I) 2 3 13 17 2 3
bluegill (I) 0 1 0 18 1
yellow bullhead(I) 0 1 0 18 1
plains killifish(I) 0 1 0 18 1
grass carp(I) 1 1 14 18 1 1
TOTAL 21,961 106,913 '93 Native = 82% 1993 = 454 collections
'93 Introduced = 18% 91-93 · 1736 collections
a = Five Colorado squawfish were captured in 1993. Only one was captured during a standardized adult
monitoring trip however, so it is the only one used in these calculations.
b = Two roundtail chub were captured in 1993, however neither were captured during a standardized adult
monitoring trip, and were not are used in the above calculations.
c = less than 0.1%

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