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TROUT IN THE CLASSROOM. NEVADA DEPARTMENT OF WILDLIFE MASON VALLEY HATCHERY Yerington , Nevada. MASON VALLEY HATCHERY. OUR HATCHERY

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TROUT IN THE CLASSROOM

NEVADA DEPARTMENT OF WILDLIFE

MASON VALLEY HATCHERY

Yerington , Nevada

mason valley hatchery
MASON VALLEY HATCHERY
  • OUR HATCHERY
    • The hatchery began construction in 1988 and opened for production in 1990 at a cost of 8.1 million dollars with an annual cost of operation of $455,000 on average.
      • That breaks down to $2.00 per pound of fish, and .50cents per fish.
      • The funding for this hatchery came from sales from the Verdi hatchery, trout stamp sales, and federal matching funds.
    • The Hatchery Crew
      • This is a full functioning facility, meaning we raise the fish from egg to liberation.
      • The hatchery has a crew of 5 employees:
        • Supervisor
        • Assistant Supervisor
        • 3 Technicians
          • The technicians are given areas of responsibility throughout the hatchery.
mason valley hatchery1
MASON VALLEY HATCHERY
  • The primary species raised
    • Pyramid Lake Cutthroat Trout
    • Independence Cutthroat Trout (Heenan Lake, California)
    • Sheep Creek Brown Trout (Gallagher Hatchery, Nevada)
    • Tasmanian Rainbow Trout ( Gallagher Hatchery, Nevada)
    • Eagle Lake Rainbow Trout ( Tenn. Or Montana NFH system)
    • Erwin Rainbow Trout ( Tenn. Or Montana NFH system)
    • Tahoe Rainbow Trout ( Marlette Lake, Lake Tahoe Nevada)
mason valley hatchery2
MASON VALLEY HATCHERY
  • Our planting location around the state range from the upper most North West corner to Walker Lake.
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TROUT IN THE CLASSROOM

  • Rainbow trout egg Daily Temperature Units (DTU’s)
  • A Daily Temperature Unit (DTU) is defined as:
    • Every 1°F above freezing (32°F) for a 24-hour period.
    • - EXAMPLE: If the water temperature for a 24-hour period stays
    • constant at 50°F, it would contribute 18 DTU’s.
    • (50-32=18)
    • - EXAMPLE: If the water temperature for a 24-hour period
    • fluctuated from 48°F for 12-hours, and 50°F
    • for another 12-hours this would contribute
    • 17 DTU’s. (48-32)/(2)=8 + (50-32)/(2)=9
    • 8+9=17
    • Don’t worry about minor temperature
    • differences, for our purposes it is
    • not that critical.
trout in the classroom1
TROUT IN THE CLASSROOM

When will they hatch?

trout in the classroom3
TROUT IN THE CLASSROOM

FACTORS EFFECTING EGG DEVELOPMENT

LIGHT

-Direct sunlight or UV light will effect the development of the eggs.

-The optimal thing to do is minimize there light exposure.

trout in the classroom4
TROUT IN THE CLASSROOM

TEMPERATURE

-Fluctuation for developing eggs is a good thing within range.

2°F to 3°F is an optimal temperature variation.

trout in the classroom5
TROUT IN THE CLASSROOM

OXYGEN

- The best condition for optimal egg development is at or near

100% saturation. To much Oxygen will cause gas bubble

disease. This is not a concern due to the systems we are using.

cutthroat trout eggs
Cutthroat Trout Eggs
  • Eyed eggs
  • 22 days old
  • @ 47 Degrees F
cutthroat trout alevin sac fry
Cutthroat Trout Alevin(sac fry)
  • Sac Fry
  • 35 days old
  • @ 47 degrees F
cutthroat trout sac fry
Cutthroat Trout Sac Fry
  • Sac Fry in late development
  • 44days
  • @ 47 Degrees F
cutthroat trout fry
Cutthroat Trout Fry
  • Fry
  • 55 days
  • @ 47 Degrees F
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