7037

• UCREFRP Catalog Number: 7037
• Author: Wyoming Game and Fish Department
• Title: Fishery Research Report
• USFW Year: 1978.
• USFW - Doc Type: Flaming Gorge Reservoir.
• Copyright Material: NO

125
100
0
a
E 75
a
50
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0
25
0

_ Productive habitat
10-foot depth
Unproductive habitat
10-foot depth
Productive habitat
25- foot depth
Unproductive habitat
25- foot depth
Month
Figure 2.
A comparison of the number of organisms per square foot from
both the productive and unproductive habitat in the Open Area.
Samples are from the 10 and 25 foot depths. 1966.
with one exception. During the month of August, the number of
organisms per square foot was the same for the productive and unpro-
ductive habitat at both the 10-foot and the 25-foot depths (Figure 3).
In the inflow area as in the open area, sampling in the unproductive
habitat produced small numbers of organisms per square foot. The
greatest number of organisms was found in July at the I0-foot depth
(15 organisms per square foot) and in June at the 25-foot depth (20
organisms) (Table 3).
Generally, more organisms per square foot were sampled from the
canyon environment than from the other areas (Figures 4, 5 and 6).
More organisms were found at the 10-foot depth in the open area in
May 1966, the inflow area in May and June 1966, and the inflow area
at the 25-foot depth in June 1966.
The number of organisms per square foot peaked in the period May
through July in all areas and at all depths. This was followed by a
sharp decline during August and September. Generally, there was an
increase in number of organisms in October, with the greatest increase
in the canyon area (Figures 4, 5 and 6).
The majority of the organisms sampled in the reservoir in 1966 were
chironomids and freshwater shrimp (Amphipoda). Chironomids were
most numerous (Table 4). Rawstron (1968) and Moore (1953)
37