McNenny State

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McNenny State Fish Hatchery
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Introduction and History

• Introduction
• McNenny State Fish Hatchery is owned and
  operated by the South Dakota Department of Game
  Fish and Parks. Trout and salmon are not native
  to South Dakota and are raised at McNenny for
  stocking in public fishing waters in the state of
  South Dakota.
• Trout were first introduced into the Black Hills
  in 1886. They are now common in many waters and
  reproduce naturally in some locations. McNenny
  supplies trout to waters where natural
  reproduction does not occur or is too low to
  provide suitable numbers of fish for anglers.
• Chinook salmon were introduced into Lake Oahe, a
  large Missouri River reservoir, in 1982. Since
  natural reproduction of salmon is not possible in
  Oahe, the population is maintained entirely by
  stocking hatchery-raised fish.

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Introduction and History

• History
• McNenny Hatchery was originally built and
  operated by the U.S. Fish and Wildlife Service.
  The site was formerly owned by James McNenny, who
  sold it to the State of South Dakota in 1943.
  The U.S. Fish and Wildlife Service leased the
  land from the state and constructed the hatchery
  in 1951.
• The hatchery was transferred to the South Dakota
  Game, Fish and Parks Department on July1, 1983,
  and was remodeled to improve the water supply,
  incubation, and indoor rearing tank system.
  McNenny Hatchery is one of three state fish
  hatcheries and is an important part of the Black
  Hills trout management and Missouri River salmon
  programs.

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Question and Answer Production

• 1) How does McNenny obtain trout and salmon eggs?
  
• A. Adult eggs are obtained from wild populations
  or from other hatcheries. Eggs collected from
  female fish are fertilized with sperm (milt) from
  male fish.
• 2) What happens to the eggs that arrive at
  McNenny?
• A. Eggs are place in trays and allowed to
  develop. The eyes become visible about halfway
  through development. The young fish, called fry,
  hatch after about forty days.

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Milt containing sperm from salmon males is added
to fertilize eggs.
Extracting female salmon eggs.
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The young fish, called fry, hatch after about
forty days.
Eggs are placed in incubation trays and allowed
to develop.
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Question AnswerProduction Continued

• 3) Where do the fry go after they hatch?
• A. The fry remain in trays until they absorb
  food stored in their yolk sacs. Then they are
  moved to circular rearing tanks.
• 4) What happens in the rearing tanks?
• A. The fish are fed commercial fish food by
  automatic feeders. As they grow, they are spread
  out into additional tanks, and eventually moved
  to the rearing ponds or covered raceways

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Yolk Sac
The fry are then moved into circular rearing
tanks.
The fry remain in trays until they absorb food
stored in their yolk sacs.
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Automatic Feeder
The fish are fed commercial fish food by
automatic feeders.
As they grow they are eventually moved to the
rearing ponds or covered raceways.
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Question and Answer Production Continued
5) What are raceways and why are they covered?
A. Raceways are long, rectangular concrete ponds
through which water flows. At McNenny they are
covered to protect the trout and salmon from
strong sunlight and predators. 6) Why dont
the ponds and raceways freeze in the winter? A.
Two artesian wells and numerous springs provide
McNenny with 2,000 gallons per minute of 52
degree F. water year-round. The water is aerated
before being delivered to the fish-rearing
facilities.
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At McNenny they are covered to protect the trout
and salmon from strong sunlight and predators.
Raceways are long, rectangular concrete ponds.
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Tow artesian wells and numerous springs provide
McNenny year-round with 2, 000 gallons per minute
of 52 degree F. water.
The water is aerated before being delivered to
the fish-rearing facilities.
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Question and AnswerProduction Continued

• 7) Where are the fish from McNenny stocked?
• A. The trout and salmon are stocked into public
  fishing waters in South Dakota where these cold
  water fish can live.
• 8) What sizes of fish are stocked form McNenny?
• A. McNenny stocks both fingerlings (3-4 inches
  long) and catchables (8-10 inches long).
  Conditions at the stocking site determine the
  sized of fish to be stocked. Factors include the
  amount of natural reproduction, type and amount
  of food available, and how much fishing takes
  place at the site.
• 9) How many fish does McNenny rear annually?
• A. McNenny rears approximately 600,000 fish or
  60,000 pounds per year and incubates about
  1,000,000 eggs.

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The trout and salmon are stocked into public
fishing waters in South Dakota.
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Fingerlings (3-4 inches long)
Catchables (11-12 inches long)
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McNenny rears approximately 600,000 fish or
60,000 pounds per year and incubates about
1,000,000 eggs.
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The species of fish reared at McNenny Hatchery
are
Brown Trout
Rainbow Trout
Chinook Salmon
Lake Trout
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Fish Health Lab
The South Dakota State Fish Health Lab is located
at McNenny. Fish are screened here for
disease-causing agents.
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Funding
Anglers pay for the Game Fish and Parks
Departments fish management programs which
include spawning stations and hatcheries. Fishing
license fees and federal excise taxes on fishing
taxes on fishing equipment apportioned back to
the state by the Sport Fish Restoration Act,
provide the monies. Enjoy your fishing trip
knowing that anglers pay their own way!
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Spawning Stations, Hatcheries and Fisheries
Management
Protecting and improving habitat in South
Dakotas lake, stream and marsh systems is a high
priority of the department. Good habitat is the
most important factor leading to good fishing.
The raising and stocking of fish is a secondary
tool. It is used with a limited number of
sportfish species in situations where natural
reproduction of the fish is lacking. This
hatchery and other state fisheries stations
provide suitable sizes and numbers of fish in
these situations.
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Visitor Inquiries
McNenny State Fish Hatchery is open to the public
during daylight hours seven days a week. Hatchery
personnel are normally on duty from 8 A.M. to 4
P.M. each day. Inquires can be directed to (605)
642-6920.
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Educational programs at McNenny offer numerous
learning opportunities. School groups of any age
are welcome as well as any other organized
group. For more information on the educational
opportunities at McNenny please contact McNenny
State Fish Hatchery 19619 Trout Loop Spearfish,
SD 57783 Phone [phone] Fax
[phone]
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Volunteering
Numerous volunteering opportunities exist at
McNenny. There is a place for you here, whether
its working with the fish, or educating hatchery
visitors, or hatchery maintenance, there is a
place for you at McNenny.
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For more information please contact McNenny
State Fish Hatchery 19619 Trout Loop Spearfish,
SD 57783 Phone [phone] Fax (605)
642-6921