7346

• UCREFRP Catalog Number: 7346
• Author: Wick, E. J. and J. A. Hawkins.
• Title: Colorado Squawfish Winter Habitat Study, Yampa River, Colorado 1986-1988.
• USFW Year: 1989.
• USFW - Doc Type: Fort Collins, Colorado.
• Copyright Material: NO

LIST OF FIGURES 1
EM I
1 Map of Yampa River study area . . . . . . . . . . . . . . . . 4
2 Map of backwater habitat during the winter at RMI 95.7 '
within the Government Bridge study area, Yampa River . . . . . . . 5
3 Map of embayment habitat during initial ice formation
at RMI 81.1 within the Maybell study area, Yampa River . . . . . . 7
4 Cross-section of solid ice and associated water depth and
ice thickness measurements . . . . . . . . . . . . . . . . . . . . 13
5 Cross-section of solid ice, frazil ice, and associated

water depth and ice thickness measurements. . . . . . . . . . . .
13 ,
6 Habitat utilization by radiotagged Colorado squawfish
during the winter from December 1, 1986 to March 6, 1987
on the Yampa River, Colorado . . . . . . . . . . . . . . . . 22
7 Habitat utilization by radiotagged Colorado squawfish
during the winter from December 1, 1987 to march 18, 1988
on the Yampa River, Colorado . . . . . . . . . . . . . . . . . . . 22
8 Mean monthly discharge on the Yampa River, October through ,
March (1917-1988) at Maybell, Colorado Compared to mean monthly
discharge during 1987 and 1988 water years . . . . . . . . . . . . 23
9 Habitat utilization by radiotagged Colorado squawfish
during the fall from September 21, to November 20, 1987
on the Yampa River, Colorado . . . . . . . . . . . . . . . . . 25 ,
10 Habitat utilization by radiotagged Colorado squawfish
during the spring from April 5 to June 30, 1988

on the Yampa River, Colorado . . . . . . . . . . . . . . . ... .
. 25 '
11 'Dotal and effective depth utilization (normalized) in
backwater, embayment, and eddy habitats by radictagged ,
Colorado squawfish during two winters (1986-1987 and
1987-1988) on the Yampa River, Colorado .. . . . . . . . . . . 29
12 'Dotal and effective depth utilization (normalized) in ,
pool, run, and shoreline habitats by radictagged
Colorado squawfish during two winters (1986-1987 and
1987-1988) on the Yampa River, Colorado . . . . . . . . . . . . . .30
13 Velocity utilization (normalized) in each habitat
by radiotagged Colorado squawfish during two winters '
(1986-1987and 1987-1988) on the Yampa River, Colorado . . . . . . .31
iv