7266

• UCREFRP Catalog Number: 7266
• Author: Pearson, W. D.
• Title: Distribution of Macroinvertebrates in the Green River below Flaming Gorge Dam, 1965-1973.
• USFW Year: 1967.
• USFW - Doc Type: Utah State University,
• Copyright Material: NO

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LIST OF FIGURES
Figure Page
1. Location of sampling stations on the Green River,
Utah - Colorado . 8
2. Mean monthly water temperatures at Greendale, Utah
(0.5 MBD) during the pre-impoundment years (1957-1959,
1962) and during the post-impoundment years (1963-65),
data from U. S. Geological Survey . . . . . . 17
3. Mean monthly discharge of Flaming Gorge Dam and range
of water temperature recorded on maximum-minimum
thermometers for unequal time intervals, Allen Ranch
(26.0 MBD), unpublished data from Utah Department of
Fish and Game and U. S. Geological Survey - January,
1963 through September,..1965 , . . . . . . .v 18
4. Density of Baetis sp. I nymphs on the bottom and in
drift, Little Hole, Green River, 1965 . . . 72
5. Density of Simuliidae larvae on the bottom and in
drift, Little Hole, Green River, 1965 . . . . 72
6. Density of Baetis sp. I nymphs on the bottom and in
drift, Carr Ranch, Green River, 1965 . . . . . . 73
7. Density of Simuliidae larvae on the bottom and in
drift, Carr Ranch, Green River, 1965 73
8. Turbidity and drift rates of Baetis sp. I nymphs,
Carr Ranch, Green River, September 5 and 7, 1965 76
9. Drift rates of Chironomidae larvae and other aquatic
invertebrates during a 1-1/2 - ft. drop;and rise in
water level, Island Park, Green River, September 7-9,
1964 . . . . . . . . . . . . . . . 78
10. Increased drift rates of Chironomidae larvae following
a sudden increase in flow, Little Hole, Green River,
June 11, 1965 . . . . . . . . . . . . . . 80
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