Digenea 



Parasite systematics 

 Distribution 



Population structure 

 Population changes 

 Population density 

 Gut contents 

 Habitat preference 



Mass mortalities 



Oxygen deficiencies in habiu 

 Fishing methods 

 Oxygen deficiencies in habitat 



Lethal environmental limits 

 Experimental analysis 

 A cestrorhamph us 



Relationships 



Oral teeth 



Gut contents 

 A cestrorhynchus 



Relationships 



Redefinition 



Synonymy 



Key 



Meristics 



Morphometries 



Pectoral girdle 

 Anatomy 



Anal fin skeleton 



Visceral skeleton 

 Anatomy 



Skull 



Anatomy 



Weberian apparatus 



Oral teeth 

 Anatomy 



Descriptive evolution 



Gill rakers 



Infraspecific variation 



Distribution 



Gut contents 



Habitat preference 

 Acestrorhynchus a/tus 



New species 



Distribution 

 Acestrorhynchus britski 



New species 

 Acestrorhynchus falcatus 



New subspecies 



Geographic variation 

 Acestrorhynchus falcirostris 



Feeding 



Habitat preference 



Acestrorhynchus guianensis 

 New species 

 Synonymy 

 Distribution 

 Acestrorhynchus minimus 

 Synonymy 

 Distribution 

 Alestes 



Relationships 

 Gas bladder 



Use in systematics 

 Anatomy 

 Function 

 Fishing methods 

 Alestes baremoze 



Identifying characters 

 Meristics 



Sexually dimorphic size 

 Rate of growth 

 Seasonal changes 

 Geographic variation 

 Maximum size 

 Energy conversion efficiency 

 Seasonal changes 

 Change with age 

 Adlibitum food capacity 

 Orcadian rhythms 

 Seasonal changes 

 Monogenea 



Parasite systematics 

 Circadian rhythms 



Feeding 

 Reproductive season 



804328 

 805573 

 808971 

 806129 

 807193 

 808023 

 807120 

 804058 

 808019 

 808023 



807021 

 80702 1 

 807120 



806652 

 807002 

 807021 

 806652 

 806652 

 806652 

 806652 

 806652 



807021 

 806652 

 807021 

 807021 



806652 

 806652 

 806652 

 806652 

 807120 

 804059 



803580 

 803580 

 805851 



806652 

 806652 

 806652 



806652 

 806652 



Habitat preference 

 Alestes dageti 



Centropomidae 

 Lates niloticus 

 As predator 



Gut contents 

 Alestes dentex 



Identifying characters 



Meristics 

 Alestes imbed 



Protective behavior 

 Alestes jacksoni 



Seasonal abundance 



Alestes longipinnis 



Distribution 

 Alestes macrophthalmus 

 Fecundity 

 Rate of growth 

 Sex ratio 

 Distribution 

 Reproductive season 

 Feeding 



Change with age 

 Habitat preference 

 Change with age 

 Alestes nurse 



Epibranchial organ 

 Anatomy 

 Histology 

 Function 



Descriptive evolution 

 Monogenea 



Parasite systematics 

 Cestoda 



Incidence of infection 

 Parasite life history 

 Alestes peringueyi 



Habitat preference 

 Alestopetersius caudalis 



Synonymy 

 Anoptichthys 

 Synonymy 

 Coloration 

 Eye 



Anatomy 

 Function 

 Development 

 Subterranean waters 

 Adaptive evolution 

 Astyanax antrobius 

 Coloration 

 Inheritance 

 Astyanax fasciatus 



Distribution 

 Astyanax jordani 

 Weberian apparatus 

 Anatomy 

 Function 

 Aural sensitivity and acuity 

 Taste buds 

 Anatomy 

 Histology 

 Development 

 Eye 



Development 

 Thyrotroph 

 Histology 



Experimental 

 Prolactin cell 

 Mucus glands 



Experimental analysis 

 Ion and water relationships 

 Subterranean waters 



Adaptation 

 Salinity 



Effect on fish 

 Mucus glands 

 Prolactin cell 



Lethal environmental limits 

 Group behavior 

 Visual senses 



Experimental analysis 

 Avoidance conditioning 

 Instrumental conditioning 

 Chemical senses 

 Astyanax mexicanus 

 Weberian apparatus 

 Anatomy 

 Function 

 Aural sensitivity and acuity 

 Retina 



Circadian rhythms 



Experimental analysis 



Characidae 

 (continued) 



alysis 



804392 

 804392 

 804392 

 804392 

 804392 



804392 



805463 

 805463 

 805463 



806612 



804080 

 807984 

 805573 



804484 

 806682 



804405 

 804405 

 804405 



341 



