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WSP11651
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Last modified
1/26/2010 3:18:25 PM
Creation date
10/12/2006 5:05:37 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8240.200.10.B
Description
UCRBRIP Annual Reports
Basin
Colorado Mainstem
Date
1/1/1999
Author
UCRBRIP
Title
1998 Annual Reports Package (incomplete) Part 2
Water Supply Pro - Doc Type
Publication
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<br />2. The spatial and temporal movements of radiotagged adult <br />Colorado pikeminnow were monitored by tracking fish from <br />boats and by two semi-permanent. land-based tracking stations <br />in April in the 2.3-mile reach of the lower Gunnison River. <br />These stations were located at the Redlands Diversion Dam and <br />one at river mile 1.4. <br /> <br />3. Three of the four fish translocated in 1998 moved downstream <br />following release over the Redlands Diversion Dam sometime in <br />late-June. Three of these four fish continued traveling <br />downstream in the Gunnison River and entered the Colorado <br />River. One fish was detected in mid- and late-July at river <br />mile 145 in the Colorado River. One other fish was found in <br />mid-July at river mile 164. immediately upstream of Walter <br />Walker Wildlife Area. Contact was established and maintained <br />with all four of the pikeminnow implanted with radiotags in <br />1998 until late-September. Contact was made in early- <br />November with two of the translocated fish. One fish was <br />contacted at Colorado River mile 157 and the other was <br />located upstream of the Redlands Diversion Dam at river mile <br />6. <br /> <br />4. Contact was maintained until late-July with five of the <br />original 11 fish radiotagged in 1997. 8y mid-August, only <br />one of these pikeminnow radiotagged in 1997 was contacted. <br />It is assumed that most of the radiotags implanted in 1997 <br />had expired. None of the fish radiotagged in 1996 (11), 1997 <br />(12), or 1998 (4) have used the fishway at Redlands. <br />However. four radiotagged fish were detected in the plunge <br />pool immediately downstream of the Redlands Diversion Dam <br />plunge pool in 1996 and two pikeminnow radiotagged in 1997 <br />were intermittently detected about 0.1 mile downstream of the <br />Redlands Diversion Dam plunge pool during late-July and mid- <br />September 1997. Two other pikeminnow radiotagged in 1997 <br />occupied a lower section of the 2.3-mile reach of the lower <br />Gunnison River in mid-July and mid-September but were not <br />detected by monitoring equipment in or immediately downstream <br />of the plunge pool. <br /> <br />) <br /> <br />At some time during 1997. the three radiotagged fish that had <br />been released in the plunge pool of the lower Gunnison River <br />moved into the Colorado River. both up- and downstream of the <br />Colorado/Gunnison River confluence. During the presumed <br />spawning period in late-July 1997. there was no discernable <br />aggregation of radiotagged fish. During this time, 12 <br /> <br />CAP-4B-5 <br />
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