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to range in size from 14 inches to about 24 inches.
Walleye can easily live for 10 or more years.
White said Narraguinnep hasn¡¯t been heavily fished
because motorized craft are not allowed on the
reservoir and most anglers troll for walleye.
If tests show that 95 percent of the fish are ster-
ile, White said that CPW will be able to make a
good case to the U.S. Fish and Wildlife Service for
stocking walleye here and at other Western Slope
reservoirs where similar stocking restrictions exist.
The U.S. Fish and Wildlife Service, CPW and other
agencies work together on the endangered fish
recovery program in the intermountain west.
White hopes a full report on the testing will be
completed late this year.
CPW is an enterprise agency, relying primarily on
license sales, state parks fees and registration fees
to support its operations, including: 41 state parks
and more than 350 wildlife areas covering approxi-
mately 900,000 acres, management of fishing and
hunting, wildlife watching, camping, motorized and
non-motorized trails, boating and outdoor educa-
tion. CPW¡¯s work contributes approximately $6 bil-
lion in total economic impact annually throughout
walleye in the reservoir.
To make fish sterile, fertilized eggs - harvested
from walleye at Pueblo Reservoir - are placed
under high pressure in a special container
which alters the chromosome structure. The
technique has been shown to be 95 percent
In work that began March 18 at Narraguinnep
Reservoir, nets will be set every night for two
weeks, walleye will be removed and a blood
sample will be taken from each fish.
A blood test, to be done by a lab in California,
will determine if the fish was sterile. About 400
fish will be removed during the operation.
Researchers will also be measuring and aging
the fish, and examining their stomach contents
to determine what they are eating. Some fish
were captured last year and they were found
is shown to be successful, sterile
walleye would lessen the threat to
native species.
¡°Our concern, which we share with
the U.S. Fish and Wildlife Service,
is that if walleye escape into the
San Juan River they would pose a
major threat to the endangered ra-
zorback sucker and pike minnow,¡±
said Jim White, aquatic biologist
in Durango. ¡°If we can show that
these fish are sterile and can¡¯t re-
produce that would greatly reduce
the risk of escaped walleye start-
ing a population in the San Juan or
Colorado rivers.¡±
The walleye experiment actually
started in 2008 when CPW began
stocking walleye fry and fingerlings
in Narraguinnep. Since then the
agency has stocked 1.5 million
Nature & Wildlife
2019 April/May
Pg 10 - The Sunshine Express
Colorado Parks and Wildlife researching
walleye at southwest Colorado reservoir
DURANGO: In the ongoing effort to provide more
sport-fishing opportunities for anglers, Colo-
rado Parks and Wildlife is conducting a research
project on walleye that have been stocked into
Narraguinnep Reservoir in southwest Colorado.
Because walleye are a predator fish that could
harm endangered native fish species in the San
Juan River Basin, CPW stocking work is
But aquatic biologists have developed a tech-
nique which renders walleye sterile and therefore
unable to reproduce in the wild. The research
study is aimed at confirming the effectiveness of
the sterilization technique and how well the wall-
eye survive in the wild. If the sterilization
Walleye Testing Moves Forward
Take Mom Fishing!
Popular Mother¡¯s Day event
known for great fishing and fun
Nucla/Norwood: It¡¯s time once again for the Sun-
shine Express Miramonte Mother¡¯s Day Fishing
Derby, at Miramonte Lake on Sunday, May 12,
2019, from 6a-3p, with $500 in cash and more
prizes up for grabs.
Miramonte Lake, located in the Dan Noble State
Wildlife Area, is approximately 20 minutes south of
Norwood, Colorado, and will be the place to be for
Mother¡¯s Day.
Fishermen and women from all over the western
slope as well as neighboring states show up every
year to have a shot at catching the longest trout
and the $500 top prize, and are invited once again
to test their luck on Sunday, May 12, 2019, be-
tween 6a-3p.
¡°With some of the state¡¯s best fishing, in one of it¡¯s
most beautiful and wildlife rich locations, right at
the base of Lone Cone Mountain, Miramonte Lake
is the perfect place for a beautiful Mother¡¯s Day
gathering, bringing together family and friends for
fishing, fun and lots of great prizes!¡± said KingDa-
ddy, Sunshine Express editor, publisher and event
organizer, adding, ¡°It is our way of giving back to
the community and saying thanks Moms.¡±
¡°We also want to say thank you,¡± added KingDaddy,
¡°to CPW for making the event possible and to our
sponsors, Timberline Ace Hardware in Norwood &
Telluride, with special thanks to all of the fine area