8159

• UCREFRP Catalog Number: 8159
• Author: Trammell, M. and T. Chart.
• Title: Aspinall Studies
• USFW Year: 1999.
• USFW - Doc Type: Annual Assessment of Colorado Pikeminnow Larval Production in the Colorado River, Utah 1992-1996 \
• Copyright Material: NO

LIST OF TABLES
Table 1. Relative abundance offish species collected in the drift, Colorado River,
1992-1996 ......................................................4
Table 2. Summary of Colorado pikeminnow collected in larval drift nets, Colorado
River, 1992-1996 ..................................................6
Table 3. Comparison ofback-calculated post-hatch ages of larval pikeminnow using
formulas developed by Haynes et al. (1985) and Muth (1990) for fish less
than 22 mm. Ages based on average Total Length (mm) ................... 7
Table 4. Summary of flow and temperature for the Colorado River, USGS gage at
Cisco,1992-1996 ..................................................8
Table 5. Comparison of Peak discharge and average June flow, to the onset of
spawning, date of 18°C, larval drift catch rates (#/1000m3), and total transport
abundance (#fish/hour) at Westwater (WW) and Moab (MO), using Pearson's
correlation coefficients. Correlations significant to the p = 0.05 level are shown
in bold .........................................................11
Table 6. Densities ofnon-native cyprinids (NNC) at Westwater (WW) and Moab (MO),
and Loma (from Anderson 1999) ..................................... 12
Table 7. Pearson's correlations between larval abundance and fall catch rates of
Colorado pikeminnow (CPM) from Interagency Standardized Monitoring
Program (ISMP) and Nursery Habitat (NH) ............................ 13
Table 8. Seasonal drift densities for Loma, Westwater and Moab and coefficient of
determination (RZ) between the three sites, and summer fall and spring
densities of Colorado pikeminnow YOY in backwaters and the RZ between
drift and backwater densities ........................................ 17
Table 9. Geometric-mean CPE (fish/m2) of NNC (fathead minnow, red shiner and
sand shiner) during fall ISMP sampling in Reach 1 and 2 (McAda et al. 1998),
and NNC drift densities at Loma (Anderson 1999), Westwater, and Moab with
coefficients of determination between NNC density at Reach 1 and 2, and
between backwater and drift sampling in the same reach .................. 18
Table 10. Average non-native cyprinid (NNC) densities (number/100 m3) from the upper
and lower stations on Colorado River (Trammell and Chart, 1998) .......... 19
Table B1. Fish species, and status, collected in drift nets in the Colorado River
1992-1996 ......................................................50
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