9673

• UCREFRP Catalog Number: 9673
• Author: Tyus, H. M. and G. B. Haines.
• Title: Distribution, Habitat Use, and Growth of Young Colorado Squawfish in the Green River Basin, Colorado and Utah - Preliminary Report.
• USFW Year: n.d.
• USFW - Doc Type: Vernal, UT.
• Copyright Material: NO

- Table 4. Relationships between some variables in backwaters and presence of
Colorado squawfish in the Green River, September and October, 1979-1985, 1987-
1988. CS = Colorado squawfish, x = mean TL (mm), N = number of backwaters,
lower nursery area = RK 35-211, upper nursery area = RK 340-515. The symbols
(t) and (G) denote the t-test and G-test, respectively; asterisks denote
significance at P < 0.05* or P < 0.01**.
CS absent CS present

Variable x SD N x SD N test

Lower Nursery Area
Temperature (°C) 17.7 5.7 82 19.4 4.4 118 t,
Max. depth (cm) 22.4 22.2 87 33.9 26.5 147 t, **
Size (m2) 309.9 644.8 32 493.7 622.6 49 t, NS
Turbidity (%)
Clear 12.5 2 7.0 4
Moderate 68.8 11 26.3 15
Turbid 18.7 3 66.7 38 G, **
Substrate
Silt 89.7 78 84.6 126
Sand 10.3 9 14.1 21
Gravel 0.0 0 0.7 1
Cobble 0.0 0 0.7 1 G, NS
Upper Nursery Area
Temperature (°C) 12.2 4.5 166 14.6 4.6 100 t, **
Maximum depth (cm)33.1 24.3 190 41.8 25.3 128 t, **
Size (m2) 269.0 354.5 55 1,158.0 1,638.4 30 t, **
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