July 2023 - 43
Walleye may not be the most popular fish sought by anglers at Lake DeSmet in the Sheridan Region, but some good-sized fish have been sampled there. (WGFD photo)
shorelines are red in the fall when those fish
come in to spawn, and those fish are 3-4
years old and 16 to 20 inches long when that
occurs. So they are fairly invulnerable to walleye
predation. "
Marvakis also said adult kokanee " are better
athletes " than walleye because of their swimming
speed and ability to evade predators.
Game and Fish stocked the three reservoirs
in the Casper Region with Bear River cutthroat
trout, also known as Bonneville cutthroat,
which is a native trout species in Wyoming.
Hahn said walleye are littoral, meaning they
generally stay near shore and are oriented with
the shore line. They don't frequent deeper
water in the middle of lakes and reservoirs.
Bear River cutthroat when they are stocked
- similar to kokanee - go to deep water and
often stay there until they are about 5 years old.
" This means the Bear River cutthroat are
not susceptible to predation to walleye because
they're not available in large numbers, " Hahn
said. " When they move back into walleye
habitat as adults, they're too big to be eaten
by walleye.
" We've seen some really good success there
versus the rainbows. The rainbows that cruise
around in the littoral area don't make it very
long. "
Hahn said of the three Casper Region reservoirs,
Alcova was the first to be stocked with
Bear River cutthroats about seven years ago.
Based on the success there, stocking followed
at Pathfinder and Seminoe and evaluations of
how the cutthroat are doing in those waters
is ongoing. Fish managers will look into the
possibility of stocking smaller Bear River cutthroats
compared to rainbow trout in these
two-story fisheries.
HOW THEY ARE DOING
Hahn said Alcova is in good shape right
now for trout and walleye, and there are liberal
walleye limits in place for anglers to keep those
numbers in check.
" We had some real challenges and there
were times the trout fishery suffered, but if we
could hit the pause button and keep it where
it is now, I think we would, " he said. " There
is a nice balance of trout and walleye, and a
Wyoming Wildlife | 43
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