Source of 

 pharmaceuticals 



712 

 704 



617 



683 

 685 



734 



673 

 671 

 588 

 559 

 616 



492 

 556 

 567 



491 

 696 



695 

 554 

 530 



530 

 530 



:"■' 

 579 

 ; "- 

 579 

 691 



567 

 557 



Salts content (See also under Fish as food) 



Sampling in fisheries (See also: Creel census, Fishing gear 

 selectivity) 



Saprolegnia infection 



Sarcodina 



Sardine (See: Clupeidae) 



Sargassum environment 



Sawfish (See: Pristidae) 



Scalation (See also: Scales) 



Scale age study 



Scale scraping for food 



Scales (See also: Sexually dimorphic scales and under Ex- 

 ternal skeleton) 



Scanning electron microscopy 



Schooling (See also under Group behavior) 



Schreckstoffe 



Science of ichthyology 



Sclera and cornea 



Scorpionfish (See: Scorpaenidae) 



SCUBA collecting 



Sculpin (See: Cottidae) 



Seahorse (See: Syngnathidae) 



Seaperch (See: Embiotocidae) 



Searobin (See: Triglidae) 



Seasonal abundance 



Seasonal changes 



Seasonal races (See also: Ecotypes) 



Seasonal sexual coloration 



Seaweeds (See also: Sargassum environment) 



Secondary gonochorism 



Seeing (See: Vision) 



Seining 



Selection effects (See also: Natural selection) 



Selective breeding (See: Artificial selection) 



Self fertilization 



Self inflation (See also: Gastric inflation mechanism) 



Self protection (See also under Social behavior) 



Selfregulation of activity 



Selfregulation of food intake 



Selfregulation of water temperature 



Semicircular canals 



Seminal vesicles 



Senescence (See also: Gerontological pathologies) 



Sense organs (See also: Barbels, Contact organs, 

 Copulatory organs. Larval sense organs, Pressure sen- 

 sitive gas bladder. Sexually dimorphic sense organs, and 

 under Training techniques) 



Sensitivity to mechanical stimuli (See also: Aural 

 sensitivity and acuity) 



Sensory deprivation 



Sensory discrimination 



Sertoli cells 



Serum esterase 



Serum proteins 



Serum transferrin 



Sex chromosomes 



Sex inheritance 



Sex linked inheritance 



Sex ratio 



Sex recognition 



Sex reversal (See also: Protandrous hermaphroditism, 

 Protogynous hermaphroditism) 



Sexual dimorphism 



Sexual selection 



Sexually dimorphic adrenal 



Sexually dimorphic blood cell counts 



Sexually dimorphic body form 



Sexually dimorphic fins 



Sexually dimorphic gas bladder 



Sexually dimorphic gut 



Sexually dimorphic kidney 



Sexually dimorphic liver 



Sexually dimorphic muscles 



Sexually dimorphic photophore 



Sexually dimorphic pituitary 



Sexually dimorphic scales 



Sexually dimorphic sense organs 



558 Sexually dimorphic size 

 Sexually dimorphic skeleton 



559 Sexually dimorphic skin 

 559 Sexually dimorphic teeth 



Sexually dimorphic thyroid 



Shad (See: Clupeidae) 

 736 Shallow water observation 

 500 Shape discrimination 



Shark (See: Squalomorpha and subgroups) 



Shelter construction (See also: Burrowing underwater, 



680 Nest construction) 

 Shiner (See: Cyprinidae) 



678 Shooting and jetting for food 

 466 Short term adaptive color change 

 586 Sibling species 

 678 Sifting for food 



444 Significance of higher taxa 

 614 Silt 



722 Silt pollutants 

 583 Silurian 



Silverside (See: Atherinidae) 

 464 Silvery coloration 



Size (See: Length frequency, Sexually dimorphic size, and 



under Growth) 

 Skate (See: Rajidae) 

 Skeletal preparation 



Skeleton (See also: Copulatory organs, Hyperostosis, 



Physics and mechanics of bones, Pug head. Rostrum, 



Scalation, Sexually dimorphic skeleton, Spines, and 



under Anatomical preparation and kinds of teeth under 



466 Gut) 



742 Skeleton age study 



Skin (See also: Brood pouch, Contact organs, Food 

 secreting skin cells. Hydrodynamics, Incubation patch, 

 Larval integument. Luminescent organs, Nuptial 

 tubercles, Pearl organs, Permeability, Sexually 

 dimorphic skuuand under Regeneration, Sense organs, 

 460 and Tegumentary system) 

 466 Skin appendages 

 466 Skin glands 



520 Skin respiration 

 466 Skin shedding 



Skull (See also: Head, Pug head. Rostrum, Snout, and 

 472 under Skeleton) 

 670 Sleep (See also under Cyclical changes) 

 593 Slow flowing streams 

 740 Small specimen techniques 



Smelling (See: Pheromones, Schreckstoffe, and under 

 Chemical senses) 



Smelt (See: Osmeridae) 



Snakehead (See: Channiformes) 



Snapper (See: Lutjanidae) 



445 Snout 



Social behavior (See also: Aural signals, Cleaning 

 symbiosis, Dominance social hierarchy, Effects of 

 isolation. Feeding on parent. Imprinting. Interspecific 

 communication, Intraspecific communication, 



Recognition of individual fish. Visual signals, and under 

 Cyclical changes. Home range and homing, 



681 Reproduction, and Self protection) 

 Soft egg disease 



Sole (See: Soleidae) 

 490 Somatic motor nervous system 

 490 Somatic sensory nervous system 



Somatotroph (See: Growth hormone cell) 

 736 Sonar observation 

 738 Sonic tagging 

 690 Sound analysis (See also: Audiogram) 



521 Sound producing gas bladder 

 689 Sound production 



Sound reception (See also: Aquatic sound techniques, 

 Aural gas bladder diverticula, Aural signals, and under 



493 Mechanical senses, especially Lagena) 



Source of animal protein (See also under Fish as food) 

 Source of pharmaceuticals (See also under Fish and 



733 medicine) 



850 



