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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.







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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