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Last modified
7/14/2009 5:02:36 PM
Creation date
5/22/2009 7:30:44 PM
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UCREFRP
UCREFRP Catalog Number
9583
Author
BIO/WEST Inc.
Title
Annual Summary Report 1993 - Survival of Age-0 Colorado Squawfish in the Green and Colorado Rivers (UDWR Contract No. 90-2558).
USFW Year
1994.
USFW - Doc Type
Logan, UT.
Copyright Material
NO
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<br /> <br />since 1987 on Green River Reach 3. Figure 4 is the cumulative CPE from the beginning of the reach (Green <br />River, RM 120) to the confluence (RM 0), cumulative CPE for fall mirrors that for spring sampling. These <br />data suggest a 5 - 10 mile downstream movement from fall to spring in some ten-mile sections, but there is <br />no consistent evidence of substantial movement of fish into or out of Reach 3 during the 6 month winter <br />period. <br />Fall to spring decreases in catch rates for Green River Reach 3 are probably not significantly influenced by <br />movement offish during the winter period. Movement does occur but it appears to be minimal-- 5 - 10 miles <br />at the most. This short-range movement likely accounts for some of the yearly fall to spring differences <br />observed within the five-mile sampling sections. <br />® FALL SAMPLING ~ SPRING SAMPLING <br />. ~~ <br />N <br />OT 1~ <br />CJ~ <br />~ 8 <br />W <br />U 6 <br />c <br />~ 4 <br />U <br />°' 2 <br />E <br />0 <br />a~ <br />~,jo ~,~o ~~p ~~o ~~o ~ o moo ~~,,o ~~o ~,~o ~~,o ,moo <br />X101 ~~~ ~~ ~_ ^a oo ~° ao ~o ~t° ~o o, <br />Ten-Mile River Sections <br />Figure 3. Geometric mean CPE for ten-mile river sections sampled in Green River Reach 3 daring fall and <br />spring sampling (1987 through 1993 combined). <br />19 <br />
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