F)0(] FISH HATCHERY MANAGEMENT 



Catfish, channel [continued] 



eggs: handling L')4-155; hatching jars 196; incubation trough 

 195; temperature units 191 



feeds and feeding: conversion '2'26, Til \ energy availability 

 22^- Til \ fish flavor 224; floating and sinking 23,5; formu- 

 lated 217, 400; frequency 257; guide 249-252; initial 256; 

 sizes 259 



grading 84 



growth, temperature- related 211 



light control 171 



nutrition: carbohydrates 218-220; diseases 390-393; lipids 

 224; proteins 217; vitamins 227-228 



selective breeding 147 



sex determination 138 



spawning 134-135; hormone-induced 173; pens and recepta- 

 cles 155 



stress 267 



temperature: control 171; requirements 134—135; Standard 

 Environmental Temperature (SET) 211 



tolerance: ammonia 21; nitrite 22; pH 11; salinity 14; tem- 

 perature 134-137; total dissolved solids 12 



toxicity: ammonia 21; nitrite 22; toxaphene, feeds 233 



transportation 362-363; small containers 367 



treatments: copper sulfate 277; formalin 276; nitrofurans 281; 

 potassium permanganate 278; salt 275; Terramycin 280 



Catfish, flathead 



spawning 134-135 



temperature requirements 134—135 

 Catfish, white, broodstock selection 148 

 Char, Arctic, spawning channels 150 

 Chemical Oxygen Demand (COD), pond effluent 27 

 Chemicals {see Drugs and chemicals) 

 Chlorine 



ammonia removal, hatchery water 23 



decontamination: equipment 283; hatchery 284 



fish control 93 



neutralization 283 



pond disinfection 90 



toxicity 14, 283 

 Circular rearing units 40-43 



Clinoptilolite, ion-exchange ammonia removal 22 

 Condition factor, calculation 61 



