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Lab 6: Senses, Suckers, and Catfish

Lab 6: Senses, Suckers, and Catfish. channel catfish ( Ictalurus punctatus ). golden redhorse ( Moxostoma erythrurum ). Auditory Systems. Inner ear Otolith rests within membranous labyrinth Swim bladder Diverticulum Clupeidae Weberian Apparatus

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Lab 6: Senses, Suckers, and Catfish

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  1. Lab 6:Senses, Suckers, and Catfish channel catfish (Ictalurus punctatus) golden redhorse (Moxostoma erythrurum)

  2. Auditory Systems • Inner ear • Otolith rests within membranous labyrinth • Swim bladder • Diverticulum • Clupeidae • Weberian Apparatus • Superorder Ostariophysi (Cypriniformes, Siluriformes)

  3. Weberian Apparatus • Bony connection between swimbladder and inner ear

  4. Mechanoreception • Lateral line

  5. Electroreception • Ampullae of Lorenzini • Sharks and kin • Electroreceptive buds • Lampreys • Cutaneous • Knifefishes

  6. Chemoreception • Olfaction “smell” • Nares • Used for food detection, orientation, predator avoidance • Gustation “taste” • Around mouth • Barbels • Skin surface • Gill arches Nare function of american eel (Anguilla anguilla)

  7. Nares of different fishes • The # of lamellae (folds) usually correlate with the ability to smell • Range from 0 (seahorses) to 230 (porgy).

  8. Vision • Fish have a 97.2° window of sight • Most can see color • Most teleosts are near-sighted

  9. Eye adaptations

  10. Fish Identification Catostomidae and Ictaluridae

  11. Family Catostomidae (suckers) • Restricted to N. America • 13 genera, 72 species • We will study 5 genera • Characterized by fleshy, subterminal to inferior mouths • Fins in primitive position White sucker (Catastomus commersoni)

  12. Smallest and Largest Agamyxis albomaculatus Silurus glenis

  13. Genus Carpiodesquillback (Carpiodes cyprinus) • Have extended ray on dorsal fin • Subtriangular subopercle

  14. Genus Catostomuswhite sucker (Catostomus commersoni) • Lips are very papillose (bumpy)

  15. Genus Moxostoma • Relatively large scales. Deeper body than Catostomus shorthead redhorse (Moxostoma macrolepidotum)

  16. Genus Hypenteliumnorthern hog sucker (Hypentelium nigricans) • Have indented head

  17. Genus Ictiobussmallmouth buffalo (Ictiobus bubalus) • Looks like a carp with no barbels or spines • Semicircular Subopercle

  18. Family Ictaluridae(catfishes) • 7 genera, 45 species • Restricted to N. and C. America • We will study 3 genera stonecat (Noturus flavus)

  19. Genus AmeiurusbullheadsAll have bulky heads and rounded caudal fin black bullhead (Ameiurus melas) yellow bullhead (Ameiurus natalis) brown bullhead (Ameiurus nebulosus)

  20. Genus Noturus(madtoms) • Adipose fin and caudal fin connected Tadpole madtom (Noturus gyrinus)

  21. Genus Ictaluruschannel catfish (Ictalurus punctatus) • Deeply forked tail. • Short Adipose Fin

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