7610

• UCREFRP Catalog Number: 7610
• Author: Wick, E. J. and J. A. Hawkins.
• Title: Colorado Squawfish Winter Habitat Study, Yampa River, Colorado, 1986-1987
• USFW Year: 1987.
• USFW - Doc Type: Final Report Year 1.
• Copyright Material: NO

0
0
0
0
0

0
0
0
0

52
m
a:
0
x
z
W
k.
SUBSTRATE - INNER HOLE (ALL DATA)
NORMAUZED
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
Total hours: 218.9
Maximum frequency (hours): 68.5
Code Substrate
M- Is T m3r-

SA = sand 3 SISI
GR = travel 4 SISA
CO = cobble 5 SIGI
90 = boulder W
7 SA
8 SASA
9 SAGI
It SACO
?A
12
13 c
`
14
G
ICO
15
G
16 COCL
17 COST
18 COSA
19 COGI
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
SUBSTRATE CODE
Figure 49. Substrates used by 10 radiotagged adult Colorado squawfish on the
Yampa River, Dec 1 - Mar 21, 1986-1987. Measurements taken 1-2 meters
towards shore from fish location. Data from combined 2.5 and 24 hour
sampling.
SUBSTRATE - OUTER HOLE (ALL DATA)
NORMALIZED
m
a:
x
z
W
3
W
It
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
Code
Substrate
CL = clay
T
SI = silt 3 SC SI
SA = sand
G9 = travel
6

CO = cobble 5
6 SI
R
SICO
10 = boulder 7 SAM
8 SASA
9 SAGR
It SACO
11 GRSI
12 GRSA
13 GRGR
14 GRCO
15 6998
16 COOL
17 COS[
18 COSA
19 COGR
Total hours: 250.1
Maximum frequency (hours): 67.3
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
SUBSTRATE CODE
Figure 50. Substrates used by 19 radiotagged adult Colorado squawfish on the
Yampa River, Dec 1 - Mar 21, 1986-1987. Measurements taken 1-2 meters
towards river channel from fish location. Data from combined 2.5 and
24 hour sampling.