7324

• UCREFRP Catalog Number: 7324
• Author: Schmidt, B., et al.
• Title: Flaming Gorge Reservoir and Green River Post-Impoundment Investigations Annual Performance Report 1977.
• USFW Year: 1978.
• USFW - Doc Type: Publication No. 78-4,
• Copyright Material: NO

-42-
gasoline-powered pump. Fresh water was pumped into the raft through-
out the trip to keep the water in the raft oxygenated and fish and
excess water were manually bucketed out of the raft during the trip.
Catchable sized trout were stocked in three groups; the first
third of the fish was stocked before the opening of fishing season
in April and May, the second group was stocked before the July 4
holiday, and the last third was stocked before the July 24 holiday.
Fingerlings were stocked in late summer to take advantage of the
warmest river temperatures which occur in the fall. The catchable
trout were planted only in the upper part of the river, from the tail-
race to Little Hole, while the fingerlings were spread throughout the
river.
Growth of the fish and population composition in the river were
determined from angler caught fish measured during the creel survey
and from fish collected by electro-shocking. Electro-shocking was
done only once in 1977, and proved to be ineffective in the deep,
clear waters of the Green River during the day. Shocking at night,
while difficult and dangerous with the boat used, was the only
feasible means of collecting large numbers of fish and representative
sizes.
Results
A total of 290,163 fish was planted in the Green River in 1977
(Table 18). Of these, 126,169 were rainbow trout and 163,994 were
• Snake River strain cutthroat trout. All of the cutthroat and the
rainbow fingerlings were marked with fluorescent red dye. Mark
retention was 96% at the time of stocking.