Dr. Les Torrans - NC Aquaculture Development Conference

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<strong>Torrans</strong> - Catfish Oxygen Studies100Feed Consumed (% Control)50How can we maintain ahigher D.O.???1) Add more aerators; raiseD.O. in entire pond.00 1 2 3 4 5Minimum D.O. (mg/L)
Page 1 and 2: Refinements in PondAquacultureLes T
Page 3 and 4: 6:208:2010:2012:2014:2016:2018:2020
Page 14 and 15: Aeration vs. Feed
Page 17: What D.O. concentrationdo catfish n
Page 23: ©2003 Les Torrans
Page 26 and 27: Minimum Daily D.O., 20021412Low Oxy
Page 28 and 29: Torrans - Catfish Oxygen Studies100
Page 34 and 35: Where does the O go?2Water Column (
Page 38 and 39: DO 2 E Corp.
Page 40: U-Tube designed and built incollabo
Page 47 and 48: Current Method:Maximize Circulation
Page 50 and 51: “Standard” Paddlewheel Placemen
Page 52 and 53: “New” Paddlewheel Placement(Min
Page 54: Experimental Design• Ten 17-acre
Page 58 and 59: Dissolved OxygenMonthMayJuneJulyAug
Page 60: AerationTractorsType(days/yr)NewSys
Page 64: PrecisionAeration:Apply OxygenDirec
Page 68: Photo courtesy ofSteven Asmus
Page 71 and 72: Sock-Saver II: the Redneck VersionC
Page 74 and 75: Oxygen Consumption of ChannelCatfis
Page 78 and 79: Eight tanks, O 2(232%)Supersaturate
Page 80 and 81: ProbePCV ProbeHolderEggPlatformSpin
Page 82 and 83:
1200“Standard”Metabolic Rate110
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1200Horsepower1100RestrictorPlate S
Page 86 and 87:
1600Metabolic Rate14001200mg O2/kg-
Page 88 and 89:
1600Metabolic Rate14001200mg O2/kg-
Page 90 and 91:
Incipient Limiting Oxygen LevelO2 S
Page 92 and 93:
Page 94:
Page 97:
Commercial Implications• Of 26 co
Page 101 and 102:
After 15 years of continuous use
Page 103 and 104:
Environmental Management System•
Page 105 and 106:
Results (after 3 years)• Average
Page 107 and 108:
Results (after 3 years)ParameterTot
Page 109 and 110:
Channel x Blue Catfish Hybrids• S
Page 111 and 112:
• Limited production• Advantage
Page 113 and 114:
Why Switch?• Economics of multipl
Page 115 and 116:
Using Aquaflor ®• For use in Cat
Page 117 and 118:
AQUAVAC-ESC®Vaccine
Page 119 and 120:
Intervet, Inc. Websitehttp://www. i
Page 121 and 122:
Impact on Production• Severe infe
Page 123 and 124:
Daniel Petre, Prairie Welding and S
Page 125:
“Zipper” SockOld SockZipper Soc
Page 132:
ltorrans@ars.usda.gov662-390-3882
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Dr. Les Torrans - NC Aquaculture Development Conference

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