Presentation on theme: "NEVADA DEPARTMENT OF WILDLIFE"— Presentation transcript:
1NEVADA DEPARTMENT OF WILDLIFE TROUT IN THE CLASSROOMNEVADA DEPARTMENT OF WILDLIFEMASON VALLEY HATCHERYYerington , Nevada
2MASON 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 CrewThis is a full functioning facility, meaning we raise the fish from egg to liberation.The hatchery has a crew of 5 employees:SupervisorAssistant Supervisor3 TechniciansThe technicians are given areas of responsibility throughout the hatchery.
3MASON VALLEY HATCHERY The primary species raised Pyramid Lake Cutthroat TroutIndependence 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)
4MASON VALLEY HATCHERYOur planting location around the state range from the upper most North West corner to Walker Lake.
11Rainbow trout egg Daily Temperature Units (DTU’s) TROUT IN THE CLASSROOMRainbow 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 staysconstant at 50°F, it would contribute 18 DTU’s.(50-32=18)- EXAMPLE: If the water temperature for a 24-hour periodfluctuated from 48°F for 12-hours, and 50°Ffor another 12-hours this would contribute17 DTU’s. (48-32)/(2)=8 + (50-32)/(2)=98+9=17Don’t worry about minor temperaturedifferences, for our purposes it isnot that critical.
13TROUT IN THE CLASSROOM Water Temperature 35 °F 40 °F 45 °F 50 °F 55 °F Rainbow TroutDays to hatch-80483124DTU’s640624558552Brown Trout1561006441468800832738
14TROUT 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.
15TROUT IN THE CLASSROOM TEMPERATURE -Fluctuation for developing eggs is a good thing within range.2°F to 3°F is an optimal temperature variation.
16TROUT IN THE CLASSROOM OXYGEN - The best condition for optimal egg development is at or near100% saturation. To much Oxygen will cause gas bubbledisease. This is not a concern due to the systems we are using.
17Cutthroat Trout EggsEyed eggs22 days old@ 47 Degrees F
18Cutthroat Trout Alevin(sac fry) 35 days old@ 47 degrees F
19Cutthroat Trout Sac Fry Sac Fry in late development44days@ 47 Degrees F