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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MAY 15 - PHASES III AND IV CONTINUED

. The released fish were checked in the morning and discovered still to be in
the area of release. The transmitter signals at this time could be picked up
from 50 to 75 yards away.
. Smith-Root Inc. was phoned and the problem of reception discussed. They
suggested uSing a whip antenna, which was intended for the yet to arrive SR-40
receiver. Upon trying the whip antenna, a substantial gain in signal strength,
. and therefore distance, was achieved.
Later in the day, radio tag 40.670 was implanted in the 1702 g (3-3/4 lb)
squawfish captured in Ashley Creek. After its recovery from the effects of the
. anesthetic, it was released into the Green River and appeared to be in good con-
dition.

MAY 16 - PHASE IV CONTINUED

I

Using the RF-40 receiver and the whip antenna, an attempt was made to locate
the four squawfish released below Ouray two days earlier. Monitoring was begun
approximately 1 mile above the release point. The squawfish bearing tag 40.652
was located in the backwater where it had been released. It was moving about and
appeared to be okay. Its signal was audible from mid-river, a distance of
approximately 100 yards. Monitoring continued downstream, and tag 40.612 was
located 3-1/2 miles below the point of release. The fish was in 6-8 feet of
water, in a run along shore. The signal was audible at 75-100 yards. As the
search for.the last two fish continued, the normally calm river became extremely
rough due to high winds and the boat was swamped. This resulted in the loss of
the directional antenna and damage to the RF-40 receiver.

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