Vol 1 contains 26 chapters on anatomy, function and functional morphology and phylogenetic relationships among siluriforms, and systematics of certain catfish groups. Vol 2 deals with the fossil record and paleodistribution, ecology and ethology, development and sensory biology.
Volume 1 Part 1 Anatomy: catfish head skeleton - an overview; review of superficial cranial musculature of catfishes, with comments on plesiomorphic states; morphology, development and evolution of the Weberian apparatus in catfish; the siluriform postcranial skeleton - an overview; internal anatomy of catfish; the skin of catfish. Part 2 Function and functional morphology: functional morphology of catfish out movements of barbels; feeding mechanisms; sound production, spine locking and related adaptations; venom apparatus, acanthotoxins, crinotoxins and other skin secretions. Part 3 Phylogeny, systematics and some problematic groups: state of the art of recent siluriform systematics; higher-level phylogeny of siluriformes (Teleostei, Ostariophysi) - an overview; phylogeny and classification of Pimelodidae; anatomy, phylogeny and taxonomy of Amphilidae (Teleostei - siluriformes); phylogeny and systematics of Bagridae; taxonomy and phylogeny of Clariidae - an overview. Volume 2 Part 4 Fossil Record: palaeontology and palaeobiogeography of catfishes; ecology and behaviour of catfishes. Part 5 Ecology and ethology: life cycles, limiting factors and behavioural ecology of four loricariid catfishes in a Panamanian stream; ecology and ethology of subterranean catfishes. Part 6 Development: embryonic and larval development in catfishes. Part 7 Sensory biology: vision of catfishes; audition; olfactory system in catfishes; taste and solitary chemorecepter cells; nitric oxide synthase in the gill and air-sac of the Indian catfish heteropneustes fossilis.