7203

• UCREFRP Catalog Number: 7203
• Author: Osmundson, D. B. and L. R. Kaeding.
• Title: Colorado Squawfish and Razorback Sucker Grow-Out Pond Studies as Part of Conservation Measures for the Green Mountain and Ruedi Reservoir Water Sales
• USFW Year: 1989.
• USFW - Doc Type: Final Report.
• Copyright Material: NO

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Pond occurred three times prior to this, during the 1983-85 studies;
causes of mortality at that time were also undetermined (0smundson 1987).
West Pond
Growth
Growth of squawfish in West Pond was more rapid than in Fish Chalet (Fig.
1). Fish probably did not grow during either winter, though no samples
were obtained in early spring to confirm this. By early June 1987, ap-
proximately 10 months after stocking, mean length had more than doubled
and mean weight had increased 10 fold (Fig. 5 and Appendix Table 7).
Growth continued through August. There was an apparent reduction in mean
length and weight in late September that is not easily explained; sample
size was relatively large (n m 25). In 1988, mean length in late Septem-
ber was 258.2 mm, an increase of 218 mm in the 25 months since stocking.
350
300
Z
0 250
W
0 200
Z
Q
E 150
E
= 100
H
Z 50
w
J
0
WEST POND
COLORADO SOU/WFiSH
1986 1987 1988 1989
- TL (mm) + WT (g) -- Condition (K)
0.9
0.85
0.8
Y
0.75
Z
O
0.7 1_-
0
Z
0.65 U
0.6
0.55
Figure 5. Mean total length, weight and condition of Colorado squawfish
in West Pond stocked on 28 August 1986.
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