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: Humpback chub adult (greater than 200 mm TL) depth
utilization curve.
Parameters: Total water column depth (ft)
Period: Year around
Location: Designated areas of distribution for humpback chub in
the Colorado, Green and Yampa Rivers.
Data utilized:
All Colorado River RARE file water column depth at point of
capture data, 1979-1981.
Data exluded:
Green River and Yampa River data due to limited sample size.
Assumptions:
1. Total water column depths measured in the. vicinity of
humpback chub captures represent their preference for
depth.
2. Water depth is not a limiting factor.
~3. Humpback chub water depth preferences in the Green and
Yampa Rivers are similar to the Colorado River.
Constraints:
1. Curves applicable to only deep canyon areas occupied by
humpback chub in the Colorado, Green and Yampa Rivers.
Curve coordinates:
X Y
ft. (SI)
2.4 0.0
3.0 . 0.5
5.5 1.0
10.0 1.0