8220

• 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

' A 24 hour observation on CS663 was conducted on 9 October 1996 at RM 102.4. CS663
' was mostly inactive during daylight hours, however during the night the fish became very
active (Figure 11). The fish repositioned itself several times within the same pool, and at
' times was observed cruising in the pool at a speed similar to a fast walking pace.
' Colorado Squawfish #40:7143 (CS714)
t CS714 was captured by angling and implanted at RM 95.5 on 29 August 1996 (the same
location and date as CS663). Movement of CS714 was contained within 0.6 river miles
' throughout the course of this study, however locations by aircraft differed greatly from
the confirmed locations obtained by ground crews (see Appendix). Ground crews always
found CS714 in one of three locations (Figures 12 and 13). Two of these locations were
deep areas within the same pool (RM 95.4, RM95.5). One area was near the head of the
pool below a submerged sandbar. The other was near the tail of the pool along a
submerged bedrock shelf. The third location was about 0.5 river miles upstream in a
' small backwater pool. In order to get back and forth from this final location, CS714 had
to pass through a shallow riffle and a long run. On the morning of 13 September 1996 a
' member of the Miller Ecological crew visually observed CS714 and three other Colorado
squawfish suspended at a depth of about one foot above the deep water immediately
' f th
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' foot area and occasionally feeding off the surface.

Draft Yampa River Radio Telemetry Report Page 17
' Miller Ecological Consultants, Inc. December 13, 1996