9360

• UCREFRP Catalog Number: 9360
• Author: Bundy, J. M. and K. R. Bestgen.
• Title: Evaluation of the Interagency Standardized Monitoring program Sampling Technique in Backwaters of the Colorado River in the Grand Valley, Colorado.
• USFW Year: 2001.
• USFW - Doc Type: Fort. Collins.
• Copyright Material: NO

' ISMP backwater sampling evaluation
' LIST OF FIGURES
Page
' Figure 1. Map of study area in the Grand Valley portion of the Colorado River CO
P Y >
' 1997-1998 ..............................................................................................................49
Figure 2. Discharge of the Colorado River, autumn 1997 and autumn 1998 ........................50
' Figure 3. Schematic of backwater sampling design in the Grand Valley reach of the
Colorado River, CO, 1997-1998 ...........................................................................51
' Figure 4. Composition of fishes from 21 backwater samples in the Grand Valley reach of
the Colorado River, CO, autumn 1997 ..................................................................52
Figure 5. Composition of fishes from 25 backwater samples in the Grand Valley reach of
the Colorado River, CO, autumn 1998 ..................................................................53
' Figure 6. Length frequency histograms for largemouth bass captured in the Grand Valley
reach of the Colorado River, CO, autumn 1997 .................................................... 54
' Figure 7. Length frequency histograms for largemouth bass captured in the Grand Valley
reach of the Colorado River, CO, autumn 1998 .....................................................55
Figure 8. Length frequency histograms for green sunfish captured in the Grand Valley
' reach of the Colorado River, CO, autumn 1997 .....................................................56
Figure 9. Length frequency histograms for green sunfish captured in the Grand Valley
' reach of the Colorado River, CO, autumn 1998 .................................................... 57
Figure 10. Logistic regression of predicted probability of detection of largemouth bass as a
' function of estimated fish density in backwaters in the Grand Valley reach
of the Colorado River .............................................................................................58
' Figure 11. Logistic Regression of predicted probability of detection of green sunfish as a
function of estimated fish density in backwaters in the Grand Valley reach
of the Colorado River .............................................................................................59
Figure 12. Density (fish/ 10 m2
) of largemouth bass in backwaters in the Grand Valley reach
' of the Colorado River, CO, 1997, estimated by depletion, mark-recapture
(DMR) and Interagency Standardized Monitoring Program (ISMP) sampling
methods ..................................................................................................................60
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