8289

• UCREFRP Catalog Number: 8289
• Author: Trammell, M. and T. Chart.
• Title: Flaming Gorge Studies
• USFW Year: 1997.
• USFW - Doc Type: Colorado Squawfish Yoy Habitat Use, Green River, utah, 1992-1996.
• Copyright Material: NO

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significantly larger, deeper, and more persistent than other habitat types. Although these factors
.~
are obviously important to YOY Colorado squawfish, we mu t keep in min~that a large number
1%
of squawfish ~ use the smaller, shallower, less permanent habitats of all types. Turbidity and
temperature do not perhaps play as great a role in habitat selection as previously thought, as no
/ si 'cant relatio
gtifi nslups could be determined from these data.
-K~ts (~
~,aa ~ c 7 Catch rates from the fall YOY ISMP sampling were compared to fall nursery habitat catch
0~ ,
~~ ~/~'r tes. Although there were fairly large differences in the mean catch rates, probably due to
differences inflow, they followed the same yearly trends (Figure 6). Mean ISMP catch rates were
consistently higher than NH catch rates, precisely because ISMP targets quality habitat, and NH
samples all potential habitats.
40
35
30
00 25
~' 20
W15
U10
5
0
---------------- -------------------
-------------- ---- ------------------

~~
3000
2800
2600 ~
2400 U
2200 ~
2000 ~
1800
1600
1J9z 1993 1994 1995 1996
YEAR
NH FLOW •ISMP FLOW
~- NH CPE + ISMP CPE
Figure 6. Comparison of YOY Colorado squawfish catch razes (/100m3) from ISMP and fall
nursery habitat studies, Green River, 1992-1996.
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