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

•
35
FREQUENCY
EVENING
18
80
TOTAL
CODE
HOURS: 38.7 UTI LIZATION

- i
40
. SISI SILT/SILT .
16.92 S1SA SILT/SAND - 4.90
SICO SILT/COBBLE
15.04 SASI SAND/SILT - 0.30
SASH SAND/ ND
13,16 SACO SAND/COBBLE - 00
GRSA GRAVEL/SAND
S1
2S GRGR GRAVEL/GRAVEL - 4.60
. COSA COBBLE/SAND
44 COGR COBBLE/GRAVEL - 4.50
7.62 - 0.40
6.64 - 0.30
3.76 - 0.20
1.88 - 0.10
4.00 , I I , 1 I I i 4.40
SI SI SI SA 51 CO SASI SASA SACO GRSA GR GR COSA COGR
SUBSTRATE
Figure 18. Substrates used by 10 radiotagged adult Colorado squawfish on the
Yampa River from 1800-2400 hours, Dec 1 - Mar 21, 1986-1987.
Measurements taken at fish location during 24 hour sampling.
FREQUENCY
NIGHT TOTAL HOURS: 49.5
80
26 UTIL IZATION

1
a4
. COD
SISI SILT/SILT .
24.12 SISA SILT/SAND 0.90
SICO SILT/COBBLE
21.44 SASI SAND/SILT 4.80
SASA SAND/SAND
1? J6 SACO SAND/COBBLE 0.70
GRSA GRAVEL/SAND
16.DS GRGR GRAVEL/GRAVEL 0.60
COSA COBBLE/SAND
13.40 COGR COBBLE/GRAVEL 0.50
10.72 0.44
8.D4 D.30
6.36 0.24

2.68 TO
4.10

D.00 1 I I I I I I I 4.Da
I
I
I
SA SA SACO GRSA GR GR COSA COGR
SASI
SI SA SI CO
SI SI
SUBSTRATE
Figure 19. Substrates used by 10 radiotagged adult Colorado squawfish on the
Yampa River from 2400-0600 hours, Dt:- 1 - Mar 21, 1986-1987.
Measurements taken at fish location during 24 hour sampling.