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Last modified
7/14/2009 5:02:29 PM
Creation date
5/20/2009 10:05:55 AM
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UCREFRP
UCREFRP Catalog Number
7202
Author
Osmundson, D. B. and L. R. Kaeding.
Title
Studies of Colorado Squawfish and Razorback Sucker Use of the '15-Mile Reach' of the Upper Colorado River as Part of Conservation Measures for the Green Mountain and Ruedi Reservoir Water Sales
USFW Year
1989.
USFW - Doc Type
Final Report.
Copyright Material
NO
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<br />mid-September it moved 6.4 miles out of the reach, moved back up to the <br /> lower mile of the Gunnison and then returned to the lower end of the 15- <br /> mile reach before contact was lost in late September. Another fish (S) <br /> tagged in late May at RM 175.0 remained in that vicinity until the last <br /> half of June when it traveled 20 miles downstream to the lower end of the <br />' 18-mile reach (RM 154.7). By late July it had returned to the 15-mile <br /> reach near the point of capture and remained there through September. In <br /> mid-October it was last located downstream at RM 157.7. Another fish (R) <br />' tagged at RM 175.0 in late May moved 4.1 miles upstream in late June and <br /> early July and then moved down to the 18-mile reach in late July or early <br /> August. It made local movements within that reach until late September, <br /> when it moved to a deep pool at RM 168.5; it remained there through at <br /> <br /> least early December. The fish (0) captured and tagged at the plunge pool <br /> of the Redlands Diversion Dam moved out of that river in mid-May, was <br /> located at progressively downstream sites within the 18-mile reach and <br /> spent the end of June near two other radio-tagged fish at RM 154.5. In <br /> mid-July it moved to Black Rocks and then to a site near the Utah border <br />' RM 129 <br /> at <br />.8. It then moved upstream at least as far as RM 162.6 in the <br />' Grand Valley in early August but then moved back downstream and was last <br /> contacted at Black Rocks in late October. The one fish tagged in the 18- <br /> mile reach (RM 168.2) moved downstream and spent early July near the Utah <br /> border at RM 130.2. In late July it moved back upstream 43 miles to the <br />' l <br />w <br />r <br />d <br />f <br />h <br />15 <br /> o <br />e <br />en <br />o <br />t <br />e <br />-mile reach. From early September through at least <br />' early December it remained near the mouth of the Gunnison River. <br /> <br />' Based on observations made during our recent studies, as well as during <br /> earlier efforts, it appears that individual squawfish have a relatively <br />' limited range during much of the fall-spring period. Many squawfish were <br /> 21 <br />
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