June 2022 - 35
Shovelnose sturgeon are named after their flattened, shovel-shaped head which helps keep them near the bottom in strong currents. Their sensitive barbels are used to help locate invertebrates.
(Photo by Garold Sneegas/Engbretson Underwater Photography)
Although they are abundant, little is
known about goldeye movements. No
previous radio-tagging studies have been
done on them and a search of scientific
literature provided scant information. The
35 implanted with radio tags between April
and June 2021 will provide a foundation of
information on this species.
" This is the first radio telemetry project
we know of to document movements of
goldeye, so we had to learn how to safely
implant those tags, " Siddons said.
The movements of shovelnose sturgeon
are of specific interest to Edwards and
Siddons. Prior to the completion of the
Kendrick bypass, now-retired fisheries
biologist Bill Bradshaw, who initiated the
project, predicted 20 species would use the
structure and move upstream in Clear Creek.
Of the 20, only the shovelnose remains to
be documented above the dam.
Five sturgeon were captured in 2021, and
one had a particularly exciting background.
On June 7, researchers captured a sturgeon
that was already marked with a floy tag from
Montana Department of Fish, Wildlife and
Parks. Floy tags do not emit signals, but are
small, thin tags biologists insert into the
muscle tissue under the skin, usually near
the dorsal fin. The tags are stamped with
a unique number and contact information
anglers or others can use to report when
and where they later capture the fish. After
visiting with MFWP fisheries biologists, it
was learned the sturgeon was first captured
on Aug. 24, 2020, 290 miles downstream
near Terry, Montana, where the Powder joins
the Yellowstone River.
" Several of our tagged goldeye and
shovelnose sturgeon also moved all the way
down to the Yellowstone River in 2021,
which was a bit of a surprise, " Siddons said.
" The first year of these projects in a new
system is always a fun learning curve. "
Wyoming Wildlife | 35
Five sturgeon were captured in
2021, and one had a particularly
exciting background.
June 2022
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