enzymes, and other subjects under Biochemistry of 

 453 fishes) 



584 Eocene 

 482 Ependyma 



Epiboly (See: Cleavage and epiboly) 

 533 Epibranchial organ 



Epinephrin (See: Adrenaline) 

 590 Epipelagic zone 

 700 Epizootics 



Erythrocytes (See also: Sexually dimorphic blood cell 

 525 counts) 



Esophageal pouch 



Esophageal respiration 

 547 Estrogens 



Estuary (See: Brackish environment) 

 639 Euphausiacea 

 748 Europe 



592 Eutrophic lakes 



Eutrophication (See: Habitat eutrophication) 



Evolution (See also: Comparative enzymology, 



Geographic distribution. Host and parasite phylogeny. 



Nucleic acids, Population genetics, and the Adaptive 



' evolution, Descriptive evolution, and Relationships of 



structures, organs, systems, habitats, and systematic 



582 groups) 



Evolutionary adaptation (See also under Evolutionary 

 processes and variation, and Adaptive evolution of 

 various structures, organs, systems, and habitats) 

 Evolutionary processes and variation 

 663 Exclusion principle (See also under Population dynamics) 

 Excretory system (See also: Carbon dioxide transport, 

 Gas transport by blood, Gill excretion, Nitrogen 

 transport. Rectum, Sexually dimorphic kidney, 

 542 Urinogenital muscles) 



Exercise (See also: Swimming chambers, Swimming 



576 endurance, and under Intermediary metabolism) 

 Exophthalmos producing substance 



Expansion of range by man (See also: Artificial 

 propagation and planting, Introduction for fishery, Use 

 655 in biological control) 



Expansion of range by natural means (See also: Stream 

 capture, zoogeography, and under Geographic 

 655 distribution) 

 734 Expedition 



Experience (See: Behavioral habituation, Effects of 

 experience, Imprinting, Learned vs unlearned behavior. 

 Memory mechanisms, and under Training techniques) 

 Experimental embryology (See: Developmental analysis 

 of various structures, organs, and systems, and also 

 Embryological techniques) 

 Experimental ichthyology (See: Experimental analysis of 

 structures, organs, systems, and processes) 

 724 Explosions underwater 



585 Explosive radiation 



External administration (See also: Anesthetics, Fish 

 control agents, Marking and tagging, Treatment for 

 disease) 

 498 External eye structure 



External gas bladder opening 

 520 External gills 



496 External nares 



467 External skeleton (See also: Scalation, Spines) 

 585 Extinction (See also: Endangered species) 

 695 Extinction of conditioned response 



497 Eye 



480 Eye muscles 



Facial nerve 



593 Fast flowing streams (See also: Torrential streams) 



Fat (See: Lipid and fatty acid content, Lipid metabolism) 

 545 Fat body 



577 Fat requirements 

 442 Faunal list 



550 Fecundity (See also: Recruitment) 



Feeding (See also: Availability and use of food, 

 Cannibalism, Food chains, Forcefeeding. Larval 



feeding organs, Selfregulation of food intake, and under 

 676 Artificial rearing environments, Gut, and Nutrition) 

 745 Feeding analysis methods (See also: Gut contents) 



Feeding captive fish (See also: Forcefeeding and under 

 739 Artificial rearing environments) 



679 Feeding on parent (See also: Food secreting skin cells) 

 552 Female genital papilla 



Female heterogamety 



Fertility 

 562 Fertilization (See also: Artificial fertilization) 

 734 Field station 



Field work '(See: Collecting fish, Ecological techniques, 

 Fossil fish techniques, Observing live fish, 

 Photographing and illustration, Wet preservation) 

 682 Fighting (See also under Aggressive behavior) 



Filefish (See: Balistidae) 



Filtration and circulation (See also under Aquaria and 

 water systems) 

 678 Fin clipping for food 



Fin muscles 



Fin rot disease 

 470 Fin skeletal supports 



Fins (See also: Hydrodynamics, Larval locomotor organs, 

 Sexually dimorphic fins, and under Appendicular 

 skeleton, Copulatory organs, and Gross external 

 470 anatomy) 



Fish and human culture (See also under Relations of fish 

 731 and man) 



Fish as food (See also under Body content and Fish and 

 733 medicine) 

 589 Fish communities 



724 Fish conservation (See also under Fisheries improvement) 



730 Fish control agents 



Fish cultural methodology (See also: Artificial 

 propagation and planting, and under Maintaining live 



725 fish) 



725 Fish cultural statistics 

 725 Fish culture 



Fish for education and entertainment 

 725 Fish guidance (See also: Fishways) 

 733 Fish in art 

 733 Fish in history 



Fish in literature 



Fish in mythology 

 733 Fish in religion 



724 Fish kill (See also: Mass mortalities, Winterkill) 

 703 Fish mycobacteriosis 



731 Fish transportation (See also: Transportation) 

 Fish-to-fish relationships (See also other subjects under 



645 Ecology and subjects under Behavior) 

 715 Fisheries improvement 



Fishery dynamics (See also: Mathematical population 

 708 models, and Population dynamics) 



Fishery products 

 708 Fishery statistics 



705 Fishing and fisheries 



Fishing gear selectivity (See also: Sampling in fisheries 

 707 and under Collecting fish) 



706 Fishing methods (See also: Collecting fish) 

 713 Fishing mortality 



717 Fishways (See also: Fish guidance) 



696 Fixed action patterns (See also under Behavior) 



Flatfish (See: Pleuronectiformes and subgroups) 



Flounder (See: Bothidae, Pleuronectidae) 



Fluorescence 



Flying (See: Aerial locomotion) 



Flyingfish (See: Exocoetidae) 



Follicle stimulating hormone 

 668 Food chains (See also: Feeding) 



Food secreting skin cells (See also: Feeding on parent) 



Forcefeeding 



Forebrain (See: Telencephalon) 



Forehead (See. Gibbous forehead, Head, Skull) 

 746 Fossil fish techniques 

 583 Fossil fishes 



Freshwater benthic zone 



Freshwater benthic 



843 



