WSP04979

• File Number: 8240.200.10.B
• Description: UCRBRIP - Riverine Fish Flow Investigations
• Basin: Colorado Mainstem
• Date: 6/1/1999
• Author: CDOW
• Title: Riverine Fish Flow Investigations 1999
• Water Supply Pro - Doc Type: Publication

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LIST OF TABLES

Table I. Sevens species composition (fish over 150 mm) for total catch and estimated
numbers in the Representative Reach and the Surveyed sites, September 1998... 10

Table 2. Duffy species composition (fish over 150 mm) for total catch and estimated
numbers in the Representative Reach and the Surveyed site, September 1998. ..11

Table 3. Density estimate, 95% c.r. (% of est.) and biomass estimate for the representative
reach (RR) and surveyed site (SS) at Sevens, Yampa River, September 1998. ...11

Table 4. Density estimate, 95% C.I. (% of est.) and biomass estimate for the representative
reach and surveyed study site at Duffy, Yampa River, September 1998. ............12

Table 5. Significant difference (S.D.) for alpha 0.05 for density estimates between the two
study sites, Sevens and Duffy for the SS and RR sections. .......................,.........12

Table 6. Sample size and mean length (nun) offish over 150 nun from the RR and the SS
portions of Sevens and Duffy, September 1998. .................................................13

Table 7. Tests of mean lengths offish between the four study areas: Duffy RR, Duffy SS,
Sevens RR and Sevens SS. Alpha equals 0.05. ..................................................14

Table 8. Shannon Weaver Diversity, total number of species, number of ephemeroptera,
plecoptera and trichoptera taxa (E.PT), mean density and density of shallow,
middle and deep samples for the Yampa River, September 1998... .....................15

Table 9. Invertebrate density, count, and diversity of shallow, middle and deep samples in
the Yampa River, September 1998. ....................................................................16

Table 10. Percent habitat types and mean wetted perimeter at bankfull flow (channel) and
mean wetted perimeter at 50, 200 and 600 cfs and (95% C. 1). Sample size at
Duffy is 32 and 29 at Sevens. .. ..........................................................................17

Table AU Length (cm) of fish measured (n) during electrofishing at Sevens representative
reach (RR) station, September 1998. Only fish over 15 cm were used in
population estimation, total fish includes counts of stulUled but not measured fish
(all less than 12 cm).. .........................................................................................26

Table A1.2 Length (cm) of fish measured (n) during electrofishing at Duffy representative
reach (RR) station, September 1998. Only fish over 15 cm were used in
population estimation, total fish includes counts of stulUled but not measured fish
(all less than 12 cm).. ...........:.............................................................................28

Table A2.1 Date, position, depth and velocity of surber samples collected on the Yampa

River, 1998. ..... ...... ........ .......... ...... ..... ...... ...... ..... '" ...... ...... ... ............. '" ............ 34