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Last modified
7/14/2009 5:02:28 PM
Creation date
5/20/2009 9:32:14 AM
Metadata
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Template:
UCREFRP
UCREFRP Catalog Number
6025
Author
Kaeding, L. R. and D. B. Osmundson.
Title
Report on the Studies of the Endangered Fishes of the Upper Colorado River As Part of Conservation Measures for the Green Mountain and Ruedi Reservoir Water Sales
USFW Year
1988.
USFW - Doc Type
Second Annual Progress Report.
Copyright Material
NO
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In 1987, four squawfish from the 15-mile reach were equipped with radio <br />transmitters. One of these (B) has remained in the reach, within 2.6 miles <br />of its capture site. Another (G) stayed in the reach during June and most <br />of July, then moved seven miles downstream. It has remained in a deep pool <br />2.5 miles below the reach since September. Another tagged fish (H) remained <br />in the reach until late July, then moved to the Redlands Diversion plunge <br />pool in the Gunnison River, but returned to the 15-mile reach in November. <br />Another (I) disappeared from the Grand Valley study area after release in <br />mid June and reappeared in the 15-Mile Reach two weeks later on 8 July; it <br />moved to the base of the Redlands Diversion in late July and remained there <br />until late September when it returned to within one mile of its release site <br />in the 15-mile reach. Three squawfish were captured from the Gunnison River <br />and radio-tagged in mid August; one of these moved 14 and another 36 miles <br />downstream within two weeks after release, whereas contact was lost with the <br />third fish. <br />Razorback sucker <br />In 1986, the single razorback sucker that was tracked left the 15-mile reach <br />within one week after release and spent the remainder of the year in a side <br />channel near WWA (Fig. 2). Contact with this razorback was lost during May <br />and June, 1987, when the fish may have moved to a spawning site. It was <br />later located downstream (RM 158.8), but then moved up to a deep pool at RM <br />168.5 where it has remained since August. Another razorback, captured from <br />the 15-mile reach (RM 178.3) and tagged in early June, 1987, was located in <br />early July downstream at RM 166.6, where it has remained. A third <br />razorback, tagged 2.8 miles downstream from the the 15-mile reach on May 19, <br />was located in the 15-mile reach (RM 175.1) on June 8. This fish was later <br />9
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