6037

• UCREFRP Catalog Number: 6037
• Author: U.S. Fish and Wildlife Service.
• Title: Endangered Colorado River Habitat Utilization Curves-Draft.
• USFW Year: 1984.
• USFW - Doc Type: \
• Copyright Material: NO

Title: Colorado squawfish juvenile (250-449 mm) velocity
utilization curve.
Parameters: Mean column velocity (cfs)
Location: Colorado, Green and White rivers reaches designated
as concentration and high concentration areas for
juvenile Colorado squawfish.
Data utilized:
All depth data in RARE file for Colorado squawfish 250-449 mm TL,
1979-1983.
Data excluded:
Radio telemetry data due to limited sample sizes.
Assumptions:
1. Incidense of juvenile Colorado squawfish captures
correctly reflects their preference for mean column velocities.
2. Juvenile Colorado squawfish velocity preference is the
same throughout the year.
3. Juvenile Colorado squawfish velocity preference is
similar throughout the upper basin.
Constraints:
1. Curves apply only to upper Colorado River Basin .rivers
occupied by juvenile Colorado squawfish.
2. Curves apply only to hydraulic models whose output is
mean column velocity.
Curve Coordinates:
X (ft/sec) Y (SI)
0.0 0.2
0.1 0.5
0.2 1.0
1.2 1.0
1.6 0.5
2.1 0.1
2.8 0.0
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