9539

• UCREFRP Catalog Number: 9539
• Author: Trammell, M., S. Meismer and D. Speas.
• Title: Nonnative Cyprinid Removal in the Lower Green and Colorado Rivers, Utah.
• USFW Year: 2004.
• USFW - Doc Type: Salt Lake City, UT.
• Copyright Material: NO

LIST OF TABLES
Table 1. Named habitats, reaches, and corresponding river miles (RM) sampled in treatment
reaches on the Green and Colorado Rivers, 1998-2000 ................................................. 26
Table 2. Numbers of fish captured in control and treatment reaches in the Green River from 1998 to
2000 ................................................................................................................. 27
Table 3. Area seined, numbers of Colorado pikeminnow (CS) and nonnative cyprinids (NNC) ,
captured in treatment and control reaches in backwaters (BA) from 1998 to 2000 in the
Green River .......................................................................................................... 28
Table 4. Analysis of covariance on effects of NNC control trips (1-5/year; covariate), treatment and
control reaches (TC), year (1998- 2000), river reach (Colorado River only; N=3) and .
interactions for the Green and Colorado rivers .............................................................. 29
Table 5. Numbers of fish captured in control and treatment reaches in the Colorado River from 1998
to 2000 ......................................................................................................... 30
Table 6. Area seined, numbers of Colorado pikeminnow (CS) and nonnative cyprinids (NNC)
captured in treatment and control reaches in backwaters (BA) from 1998 to 2000 in the ~
Colorado River ...................................................................................................... 31
LIST OF FIGURES
Figure 1. Study Area: Green River from above Ruby Ranch to Mineral Bottom (RM 102-50). ,
Colorado River; Dewey Reach from above the Dolores River to near Hittle Bottom (RM 97-
87), Moab Reach from above Moab Bridge downstream (RM 65-55), and Lathrop Reach
from near upper border of Canyonlands NP downstream (RM 30 to 20) ........................... 32
Figure 2. (a) Discharge as measured at the USGS Green River gage (#09315000) from 1998 to '
2000. (b) Colorado River: Discharge as measured at the USGS Cisco gage (#09180500)
from 1998 to 2000. Sample periods are indicated by thick lines ....................................... 33
Figure 3. Green River: Length frequency distribution of Colorado pikeminnow captured in treatment
and control reaches (combined) from 1998 to 2000 ....................................................... 34
Figure 4. Green River: Percentages of native to nonnative fishes in treatment and control reaches, ~
1998 to 2000 ....................................................................................................... 35
Figure 5. Green River: numbers of adult (>40 mm) and subadult (<40 mm) nonnative cyprinids in
treatment and control reaches from 1998 to 2000 .......................................................... 36
Figure 6. Green River: Mean CPE (fish/10m2) of nonnative cyprinids (NNC) and Colorado ~
pikeminnow (CS) captured in treatment and control reaches from 1998 to 2000. Error bars
represent two standard errors ................................................................................... 37
Figure 7. Green River: Mean CPE (fish/10m2) of nonnative cyprinids captured on consecutive
removal trips in treatment and control reaches from 1998 to 2000. Error bars represent two
standard errors ...................................................................................................... 38 ~
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