7071

• UCREFRP Catalog Number: 7071
• Author: Bosley, C.
• Title: Pre-Impoundment Study of the Flaming Gorge Reservoir.
• USFW Year: 1960.
• USFW - Doc Type: Cheyenne.
• Copyright Material: NO

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Part of Perch Kill Obtained
In Eden Valley Reservoir
Hybrid Trout - (Salmo gairdneri irideus x Salmo clarkii)
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In September, 1959, pronox fish was used to sample the fish populations
at the mouth of Carter Creek. Species recovered were sculpins, dace and
trout. The trout coloration was that of a rainbow x native cross, The
scale count was also that of hybridized fish. By use of scales and otoliths
the age of these fish was established at two years. Inquiries into the
stocking policy set by the Utah Fish and Game revealed that two plants of
native fry had been made. One plant of 30,672 fry in 1946 and one plant of
52,992 fry in 1955 were made. The remainder of fish planted have been rain-
bow, except for one brook plant in 1948. It is believed that the hybrids
taken in September, 1959, are a result of the 1955 native plant crossing
with rainbow present in the stream. This evidence of natural reproduction
should place Carter Creek high on the list of tributary streams capable of
producing an annual spawning run, and subsequent returns to the reservoir
proper
Fathead Minnow - (Pimephales promelas promelas)
This minnow taken by the Utah Fish and Game is not indigenous to the
Green River system. Since it was found only in one location, approximately
_. ten miles upstream from the Wyoming-Utah State Line, it is probably a recent
introduction in this area.