3010

• UCREFRP Catalog Number: 3010
• Author: Holden, P. B. and D. A. Selby.
• Title: Study to Determine the Spawning Requirements of Colorado Squawfish.
• USFW Year: 1978.
• USFW - Doc Type: Logan, UT.
• Copyright Material: NO

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Also on this date, testing of the remaining radio tags was continued in an
. attempt to quantify their ranges under various field conditions. To do this, the
transmitters were mounted on wooden poles and placed in the river at various
depths. The range was determined by motoring away from the transmitter until the
. signal was lost. Testing in this manner was continued on July 5.
On July 7, a helicopter was used in a final effort to search for the lost
fish. With it, the river was flown from Split Mountain above Jensen to river
. mile 141 and from .Sand Wash to Green River, Utah. The intervening area was cov-
ered numerous times by boat. The White River, a major tributary of the Green,
was searched from its mouth to just below Piceanse Creek in Colorado. The lower
If reaches of the Duchesne River, another Green River tributary, were also searched.
No fish were located during the flight.
July 10 through 13 were spent using raft-mounted equipment to search the
. upper river from Deerlodge Park on the Yampa River to Split Mountain on the Green,
where the helicopter flight was begun. Again, no fish were found.
July 7 through 8 were dates on which testing of transmitters was continued.
It A final search was made for 40.670 on July 11. His earlier pattern of
movement indicated that at this time he was somewhere in Desolation Canyon. A
boat trip covering a distance of 31 miles, from five miles above Sand Wash to
, Jack Creek Rapid, was unsuccessful in locating this fish.

JULY 18 - TERMINATION OF FIELD WORK
On order of the Contracting Officer, all field operations were ceased.

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