Gymnorhamphichthys hypostomus 

 Oxygen deficiencies in habitat 

 Lethal environmental limits 

 Experimental analysis 

 Hypopomus 

 Electric organs 

 Ultrastructure 

 Hypopomus occidentalis 

 Electric organs 



Intraspecific communication 



Electrical sensitivity 



Experimental analysis 

 Habitat preference 

 Steatogenys 



Electrical sensitivity 



Group behavior 

 Habitat preference 

 Aggressive behavior 

 Experimental analysis 

 Siluriformes 

 Relationships 



Meristics 



Caudal skeleton 

 Caudal skeleton 

 Anatomy 



Descriptive evolution 

 Infraspecific variation 

 Gill arches 

 Anatomy 



Descriptive evolution 

 Weberian apparatus 

 Anatomy 



Function 

 Descriptive evolution 

 Gas bladder 

 Anatomy 

 Gill arch teeth 

 Anatomy 



Descriptive evolution 

 Bile 



Biochemistry 



Descriptive evolution 

 Oligocene 

 Zoogeography 



Digenea 



Parasite life history 

 Nematoda 



Parasite life history 

 Distribution 



Phreatobius cistemarum 

 Relationships 

 Ageneiosidae 

 Relationships 



Meristics 



Caudal skeleton 

 Caudal skeleton 

 Anatomy 



Descriptive evolution 

 Ageneiosus 

 Digenea 



Parasite systematics 

 Ceratocheilus osteomystax 

 List of types 

 Museu Paulista 

 Amblycipitidae 

 Relationships 

 Meristics 



Caudal skeleton 

 Caudal skeleton 

 Anatomy 



Descriptive evolution 

 Acrochordonichthys rugosus 



Torrential streams 

 Amblyceps mangois 

 Distribution 

 Amphiliidae 

 Relationships 



Meristics 



Caudal skeleton 

 Caudal skeleton 



Anatomy 



Descriptive evolution 

 Distribution 

 Amphiiius 



Habitat preference 



805480 

 805480 



805484 

 805234 

 804807 

 805461 



804361 



804361 

 804328 

 804807 



805628 

 807129 

 807161 



807004 



807134 

 807161 

 807161 



807161 

 805671 

 806733 



Amphiiius atesuensis 



Monogenea 



Parasite systematics 

 Amphiiius brevis 



Habitat preference 

 Doumea typica 



Habitat preference 

 Ariidae 



Relationships 

 Redefinition 

 List of types 

 Meristics 



Caudal skeleton 

 Caudal skeleton 



Anatomy 



Descriptive evolution 

 Pelvic girdle 



Anatomy 



Use in systematics 

 Distribution 



Seasonal abundance 

 Seasonal abundance 



Larva 

 Gut contents 

 Alius 



Meristics 



Morphometries 



Oral teeth 



Sibling species 



Fish communities 



Vertical distribution 



Cestoda 



Distribution of infection 



Population changes 



Seasonal abundance 



Archeological data 

 India 



Gut contents 



Change with age 

 Arius felis 



Ion and water relationships 



Erythrocytes 

 Erythrocytes 



Ion and water relationships 

 Experimental analysis 

 Hemoglobin 

 Seasonal abundance 



Fish control agents 

 Antimycin 



Lethal environmental limit 

 Venomous fish 

 Defensive spines 



Experimental analysis 

 Arius grandicassis 

 Digenea 



Parasite systematics 

 Arius hcudeloti 



Gross external anatomy 

 Ovarian cycles 

 Fecundity 

 Testicular cycles 

 Gut contents 



Seasonal changes 

 Change with age 

 Oral brooding 



Arius mercatoris 

 Sibling species 



Arius thaiassinus 

 Distribution 



Bagre 



Seasonal abundance 



Doiichthys novaeguineac 



Relationships 

 Gahichthys seemani 



Monogenea 



Parasite systematics 

 Osteogeneiosus mih'iaris 



Sexually dimorphic size 



Reproductive season 



Migrations 

 Skeleton age study 





Siluriformes 



805052 





808019 



Ageneiosidae 



808019 





807161 

 808135 

 805935 



Amblycipitidae 



807161 



Amphiliidae 



806740 

 807752 



804552 

 804552 

 804552 

 804552 

 806740 

 804552 



805473 

 808633 

 807752 



803718 

 805138 

 805068 

 808873 



807004 



804552 

 804552 

 804552 

 804552 



804552 

 804552 

 804552 



808142 



808577 

 805520 

 805521 

 808577 

 805520 

 805521 



373 



