Dr. Les Torrans - NC Aquaculture Development Conference

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1200“Standard”Metabolic Rate1100Limiting OxygenLevel1000900800700600500∆ mg O2/kg-h1251007550250400% Oxygen Saturation
1200Horsepower1100Limiting OxygenLevel1000900800700600500∆ mg O2/kg-h1251007550250400% Oxygen Saturation
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Refinements in PondAquacultureLes T
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6:208:2010:2012:2014:2016:2018:2020
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Aeration vs. Feed
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What D.O. concentrationdo catfish n
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©2003 Les Torrans
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Minimum Daily D.O., 20021412Low Oxy
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Torrans - Catfish Oxygen Studies100
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Torrans - Catfish Oxygen Studies100
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Page 37 and 38: Roland Schmidt, Aerway Mfg. Co.,“
Page 39 and 40: P.A.S. / Wilfley-WeberSubterranian
Page 43: 5-HP 3-phasemotorDiffuser in mouth
Page 46 and 47: Torrans - Catfish Oxygen Studies100
Page 48: Aerators placed in parallel on the
Page 51 and 52: “Standard” Paddlewheel Placemen
Page 53 and 54: Paul D. DeesDillard & Co, Inc.
Page 57 and 58: Water QualityParameterNewSystemOldS
Page 59 and 60: ProductionParameterNet Yield(lbs/ac
Page 63 and 64: • 550 acre Mississippi delta farm
Page 66: The Sock-SaverSaver
Page 70 and 71: Total Cost: $8300
Page 72: Total Cost: $2300Photograph courtes
Page 75: Established CatfishSpawning Techniq
Page 79 and 80: Effect of Dissolved Oxygen onCatfis
Page 81: D.O. Conc. (mg/L)10.09.08.07.06.05.
Page 85 and 86: 1600Metabolic Rate14001200mg O2/kg-
Page 87 and 88: 1600Metabolic Rate14001200mg O2/kg-
Page 89 and 90: Incipient Limiting Oxygen LevelO2 S
Page 91 and 92: Incipient Limiting Oxygen LevelO2 S
Page 93 and 94: 65Drop in DO Inside Spawn (mg/L)432
Page 96 and 97: Effect of Dissolved Oxygen onCatfis
Page 100 and 101: Recent Developments
Page 102 and 103: Sedimentation and Oxygen LossOld Po
Page 104 and 105: Research ProtocolEMS• Pond water-
Page 106 and 107: Pond Water-level Management Scheme1
Page 108 and 109: BlueHybridChannel
Page 110 and 111: Producing Hybrid CatfishFry: Worksh
Page 112 and 113: Multiple-batchProductionFingerlings
Page 114 and 115: Aquaflor ® Approved• Approved by
Page 116 and 117: Aquaflor ® Websitehttp://www.aquaf
Page 118 and 119: AQUAVAC-COLCOLVaccine
Page 120 and 121: Life cycle of Bolbophorus sp.Mature
Page 122 and 123: The “Seine-itizer”
Page 124 and 125: In-Pond (“Heikes(Heikes”) ) Gra
Page 131 and 132: ORGANIC PRODUCTION OFCHANNEL CATFIS
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Dr. Les Torrans - NC Aquaculture Development Conference

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