Embryological development 235 



Growth and regeneration 238 



Nutrition 241 



Genetics 243 



Hybridization 244 



Evolution 247 



Stratigraphic distribution 247 



Evolutionary processes 250 



Variation 251 



Zoogeography 252 



Ichthyological techniques 252 



Ecology 259 



Habitats 259 



Environmental factors 266 



Fish-to-fish relationships 285 



Geographic distribution 289 



Population dynamics 290 



Behavior 294 



Cyclical changes 294 



Orientation and locomotion 298 



Feeding 300 



Protective behavior 304 



Social behavior 305 



Home range and migrations 307 



Sound production 308 



Reproduction 309 



Behavior in experiments 312 



Pathology and parasitism 314 



Relations of fish and man 318 



Fishing and fisheries 318 



Conservation of fish 325 



Fish culture 329 



Fish and medicine 332 



Fish and human culture 334 



The science of ichthyology 334 



GEOGRAPHIC INDEX 337 



Continental regions 337 



Africa 337 



Australia 337 



Central America * 



Europe 337 



India 338 



Mideast 339 



North America 339 



North Asia 340 



South America 341 



South Asia 341 



Oceanic regions 341 



North Atlantic Ocean 341 



