9350

• UCREFRP Catalog Number: 9350
• Author: Hawkins, J., T. Modde and J. Bundy.
• Title: Ichthyogauna of the Little Snake River, Colorado, 1995 with Notes on Movements of Humpback Chub.
• USFW Year: 2001.
• USFW - Doc Type: Denver.
• Copyright Material: NO

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Telemetry of humpback and roundtail chub

Two of the four humpback chub captured in the Little Snake River were
implanted with transmitters lTable 6). One humpback chub was captured in an
eddy at RK 14.5 and implanted with a transmitter 140.680 MHz) on June 21. It
occupied the Little Snake River for at least 28 days until our last ground contact on
July 18. The fish maintained a high fidelity to the site of capture. During the first
two weeks, we detected no movement away from the original eddy, although we
did observe localized movements of the fish within the eddy. In early July, the fish
moved 1-km downstream to an eddy in the canyon and then returned to RK 14.5
within three days. In mid-July this fish was located in an eddy at RK 13.2 in the
canyon where it remained during our last three days of ground contact lTable 11).
In addition to telemetry contacts, this fish was recaptured twice, once by trammel
net and once by angling with a live cricket. The fish was in good health on both
occasions and by the second recapture, 25 days after surgery, its incision was
completely healed (Table 6). This fish was last observed in the Little Snake River
on July 18 in run habitat at RK 13.2. Subsequent searches on July 26 could not
locate the fish in the Little Snake River; however, it was located by airplane on
August 9 in the Yampa River at RK 59. It had moved 14.5 km downstream from
its original capture location in the Little Snake River to the Yampa River confluence
and then downstream an additional 24 km into Yampa Canyon for a total distance
of about 39 km.

The other telemetered humpback chub was captured in an eddy at RK 5.6 in
the Little Snake River and implanted with a transmitter (40.680 MHz) on July 6.
This fish also showed fidelity to the site of capture. The fish occupied the same
eddy on all four occasions until our last ground contact in the Little Snake River on
July 26. During most contacts the fish was actively moving within the eddy. It

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