Gas bladder 

 Histology 



Ultrastructure 

 Function 

 Ovary 



Arterial system 



Anatomy 

 Venous system 

 Anatomy 

 Ovarian cycles 

 Adaptation 

 Acclimation 

 Fecundity 



Young 

 Energy conversion efficiency 

 Ecotypes 



Distribution within habitat 

 Water movement 

 Geographic variation 

 Temperature 



Lethal environmental limits 

 Light 



Habitat preference 

 Change with age 

 Water pressure 

 Effect on fish 

 Behavior 

 Hydrogen ion concentration 

 Effect on fish 



Muscular electrophysiology 

 Heart 

 Ammonia 



Gas transport by blood 

 Experimental analysis 

 Ciliata 



Host specificity 



Host parasite interactions 

 Monogenea 



Distribution of infection 

 Incidence of infection 



Intensity of infection 

 Host specificity 

 Digenea 



Incidence of infection 

 Seasonal changes 



Intensity of infection 



Host specificity 



Host parasite interactions 



Host specificity 

 Parasite systematics 

 Cestoda 



Incidence of infection 

 Seasonal changes 



Intensity of infection 



Parasite life history 

 Parasite life history 



Host specificity 

 Host specificity 



Experimental analysis 

 Host parasite interactions 

 Nematoda 



Incidence of infection 



Seasonal changes 



Intensity of infection 



Host specificity 



Experimental analysis 

 Parasite life history 

 Acanthocephala 



Incidence of infection 

 Seasonal changes 



Intensity of infection 



Host specificity 

 Parasite systematics 

 Hirudinea 



Incidence of infection 

 Intensity of infection 



804045 

 804045 



806440 

 803678 

 804443 

 805716 

 808352 

 804054 

 803901 

 804443 



805419 



806667 



803827 

 804123 



806657 

 806658 

 803827 

 806657 

 806658 

 804123 



806657 

 806658 

 803827 

 806657 

 806658 

 806256 



803978 



804123 

 805120 



806657 

 806658 

 806657 

 806658 

 804123 

 806444 

 806444 



806657 

 806658 

 803827 

 806657 

 806658 

 804123 

 806261 



Parasite systematics 

 Host specificity 

 Branchiopoda 



As food for fish 

 Copepoda 



Host specificity 



Host parasite interactions 

 Distribution 



Expansion of range by man 

 Age class distribution 

 Availability and use of food 

 Circadian rhythms 



Feeding 

 Activity patterns 



Seasonal changes 

 Reproductive season 



Seasonal abundance 

 Locomotion 



Vertebrae 



Descriptive evolution 



Axial skeletal muscles 

 Descriptive evolution 

 Feeding 



Muscular electrophysiology 



Change with age 

 Gut contents 



Young 



Seasonal changes 

 Breathing 



Muscular electrophysiology 

 Habitat preference 



Egg laying 

 Optomotor response 

 Myxosporidiosis 

 Anchor worm infestation 

 Incidence of infection 

 Intensity of infection 

 Coarse fish control 

 Dams and barriers 

 Effect on fish 



Population changes 

 Entrainment 

 Light 



Experimental analysis 

 Herbicide pollutants 

 Effect on fish 



Lethal environmental limits 

 Archeological data 

 Marking and tagging 

 Experimental analysis 

 Vital dyes 

 Young 



Experimental analysis 

 Scale age study 

 Allometry 

 Pcrca notogramma X 

 Percina peltata X 

 Meristics 



Geographic variation 

 Natural hybridization 

 Perca schrenki 

 Gills 



Histology 



Function 



Percarina demidoffi 



Reproductive season 



Hydrostatics 



Percina caprodes 



General structure and behavior 

 Larva 



Change with age 

 Distribution within habitat 



Larva 

 Vertical distribution 

 Larva 



Circadian rhythms 

 Reproductive season 

 Percina evides 

 New subspecies 

 Meristics ' 

 Morphometries 

 Sexual dimorphism 

 Infraspecific 

 Zoogeography 

 Distribution 

 Percina notogramma 

 Relationships 



Percidae 

 804221 (continued) 



806514 



804123 

 804134 

 804407 

 804901 

 805962 

 806415 

 807198 

 806844 

 805716 

 807718 

 804527 

 807718 



804527 

 804420 



Perca 



804897 

 804054 



807718 



804420 

 806339 

 804123 



804123 



808251 



805127 



808360 

 804054 



806674 

 808139 

 808139 



808139 

 808139 



807000 

 807000 

 807000 

 807000 

 807000 

 807000 

 807000 



807600 



257 



