Hydrogen ion concentration 

 Effect on fish 



Fish control agents 

 Inorganics in water 

 Effect on fish 



Fish control agents 

 Anesthetics 



Lethal 

 Calcium 



Effect 01 

 Fluoride 



Effect 01 

 Strontium 

 Effect oi 



Mineral content 

 Stress reactions 

 Carbon dioxide 

 Effect on fish 



Gas transport by blood 



fish 



Lethal environmental limits 

 Experimental analysis 

 Silt 



Effect on fish 



Fish control agents 

 Bacteria 

 Gut 



As food for fish 

 As commensal 

 Endotoxin 



Effect on fish 

 Ciliata 



Host specificity 



Host parasite interactions 

 Digenea 



Intensity of infection 

 Experimental analysis 



Host parasite interactions 

 Treatment for disease 



Experimental analysis 



Host parasite interactions 



Experimental analysis 



Parasite life history 



Cestoda 



Incidence of infection 

 Intensity of infection 

 Host parasite interactions 

 Nematoda 



Host specificity 



Experimental analysis 

 Petromyzontomorpha 

 Petromyzon marinus 

 As predator 

 Lethal environmental limits 

 Fish control agents 

 Change with age 

 Distribution 



Expansion of range by man 

 Populations 

 Migrations 



Rate of growth 

 Population changes 



Population density 

 Rate of growth 



Experimental analysis 

 Interspecific competition 

 Experimental analysis 

 Interspecific competition 

 Feeding 

 Juvenile 

 Availability and use of food 



Distribution within habitat 

 Food chains 

 Orcadian rhythms 

 Change with age 

 Fry 



Activity patterns 

 Distribution within habitat 

 Reproductive season 



Hydrodynamics 



Experimental analysis 

 Hydrodynamics 

 Feeding 



Orcadian rhythms 



Experimental analysis 



806974 

 806974 



805955 

 808604 



807773 

 808535 



807773 



808604 

 804901 

 806415 

 808971 



807521 

 803793 

 805641 

 807959 



806032 

 806032 



807824 

 806105 

 806123 

 806025 



806105 



807202 

 807202 

 806025 



807008 



Gut contents 



Change with age 

 Habitat preference 

 Light 



Experimental analysis 

 Change with age 

 Substratum 



Experimental analysis 

 Change with age 

 Avoidance responses 

 Light 



Experimental analysis 

 Aggressive behavior 



Territoriality 



Home range and homing 



Artificial propagation and planting 

 Experimental analysis 

 Migrations 



Fry 



Experimental 



alysis 



Change with age 



Biochemistry 

 Infraspecific variation 



Descriptive evolution 

 Reservoirs 

 Nest construction 

 Psychedelic drug treatment 

 Enzymology 

 Brain 

 Hepatoma 



Liver 



Biochemistry 

 Fungus diseases 



Prophylactic treatment 

 Aflatoxin 



Experimental analysis 



Stress reactions 

 Effect on fish 

 Coelom 

 Temperature 

 Adrenal cortex 



Experimental analysis 

 Radioactivity 



Experimental analysis 

 Oxygen deficiencies in habitat 



Kidney 

 Calcium 



Ion and water relationships 

 Experimental analysis 

 Treatment for disease 

 Oxytetracycline 



Intermediary metabolism 

 Body content 

 Prophylactic treatment 

 Bacterial diseases 



Experimental analysis 

 Egg 

 Virus diseases 



Infectious hematopoieti 

 Effect on fish 



Tissue culture techniques 

 Infectious pancreatic necrosis 

 Ultrastructure 



Development 



Immunological 



Experimental 



Genetic dise; 



Viral hemorrhagic 



Effect on fish 



Identification 

 Prophylactic 



Treatment for disease 

 Tissue culture techniques 

 Biochemistry 

 Bacterial diseases 



liquefaciens 



Prophylactic 

 Furunculosis disease 

 Oxytetracycline 

 Treatment for d 

 Experimental 

 Fish mycobacteriosis 

 Identification 

 Effect on fish 

 Prophylac 



analysis 



ie resistance 



septicemia 



807545 

 806019 

 806252 

 806252 

 807959 



807778 

 806873 

 808373 

 807340 

 804119 

 806025 



807527 



804661 

 806073 

 806074 



804368 

 803633 

 807776 



808853 



Salmonidae 

 (continued) 



Salmo gairdneri 



429 



