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Last modified
7/14/2009 5:02:33 PM
Creation date
5/17/2009 11:06:57 PM
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UCREFRP
UCREFRP Catalog Number
8220
Author
Miller, W. J. and D. E. Rees.
Title
Colorado Squawfish Habitat Use and Movement During Summer Low Flow in the Yampa River Upstream of Cross Mountain Canyon.
USFW Year
1996.
USFW - Doc Type
Fort Collins, Colorado.
Copyright Material
NO
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<br /> <br /> <br /> <br />1 <br /> <br /> <br /> <br /> <br /> <br />Colorado Squawfish #40:7419 (CS741) <br />CS741was captured by angling at RM 82.7 on 27 August 1996. This fish was relocated <br />on at least 12 separate occasions and was never found more than one river mile from the <br />capture location (Figures 4 and 5). CS741 was almost always located in one of the two <br />large pool habitats located within this area. The only exceptions occurred when it was <br />found in an eddy along the lower edge of one of the large pools, or was found in a run at <br />the head of the other pool. The two large pools were unique because each had a <br />submerged shelf in deep slow moving water. The lower pool had a bedrock shelf and the <br />upper pool contained a submerged sandbar. CS741 was usually associated with one of <br />these two habitats. Although more than 0.3 miles of run and riffle habitat existed <br />between the two pools, CS741 never remained within this area during monitoring <br />periods. <br />A 24 hour observation was conducted on CS741 beginning at 9:15 a.m. on 23 October <br />1996 (Figure 6). CS741 remained mostly inactive, however did change positions once <br />during the daylight hours. CS741 became moderately active after sunset then changed <br />habitats prior to 10:15 p.m. when it was relocated in an eddy pool about 700 feet <br />downstream. Contacts made after 10:15 p.m. indicated that CS741 was very active <br />within a 20 foot area of the eddy pool. This activity continued until 1:15 a.m. on 24 Oct. <br />96 when the fish became mostly inactive. CS741 remained stationary and inactive <br />throughout the remainder of the 24 hour observation. <br />Colorado Squawfish #40:6840 (CS684) <br />CS684 was captured by angling on 27 August 1996 immediately below the sandbar shelf <br />in the upper pool used by CS741 at RM 83.0. Early contacts with the fish suggested that <br />shortly after it was captured and implanted this fish began moving downstream. The day <br />after its release it was located near the submerged bedrock shelves in the pool with <br />CS741 at RM 82.7. Within 12 days CS584 had moved over five miles downstream <br />Draft Yampa River Radio Telemetry Report Page 10 <br />' Miller Ecological Consultants, Inc. December 13, 1996
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