Dr. Les Torrans - NC Aquaculture Development Conference

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Producing Hybrid CatfishFry: Workshop ManualGoogle “TCNWAC”,go to “publications”
• Limited production• Advantages• Can be pond-spawned• More resistant to ESC, PGD• Desirable for pay lakes• Easy to seine• More uniform growth• Disadvantages ?• Late maturity• Harvest issues• Tolerance of low DO andhandling stress ?• Processing issuesBlue Catfish
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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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Roland Schmidt, Aerway Mfg. Co.,“
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5-HP 3-phasemotorDiffuser in mouth
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Aerators placed in parallel on the
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“Standard” Paddlewheel Placemen
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Paul D. DeesDillard & Co, Inc.
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Water QualityParameterNewSystemOldS
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Page 72: Total Cost: $2300Photograph courtes
Page 75: Established CatfishSpawning Techniq
Page 79 and 80: Effect of Dissolved Oxygen onCatfis
Page 81 and 82: D.O. Conc. (mg/L)10.09.08.07.06.05.
Page 83 and 84: 1200Horsepower1100Limiting OxygenLe
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
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Page 100 and 101: Recent Developments
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Dr. Les Torrans - NC Aquaculture Development Conference

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