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  1. Part 3 “Fishes” – an introduction

  2. “Fishes”

  3. Vertebrata

  4. Figure 24.2 Vertebrata “Fishes”

  5. Fish Diversity ca. 25,000 described species 482 families with living representatives

  6. Smallest < 1cm Largest > 12m

  7. Smallest < 1cm Largest > 12m

  8. Deepest 8,370m (27,455 feet) Abyssobrotula galatheae Highest 5,200m (17,000 feet)

  9. Hottest up to 43.8° C (110.8°F) Cyprinodon pachycephalus Coldest -1.86° C (28.6°F)

  10. Hypersaline Up to 3x sea water Cyprinodon variegatus

  11. Torrential water Colorado River Fishes

  12. Trogloglanis pattersoni Caves Satan eurystomus

  13. Anoxic water

  14. Airbreathing

  15. Diet

  16. Reproduction

  17. Life Spans several weeks 150+ years

  18. Primitive and early fishes

  19. Living jawless fishes = “agnatha”

  20. Jawless Fishes (living)

  21. Jawless Fishes (living)

  22. Class Myxini Hagfishes

  23. We’re craniates, but not vertebrates

  24. Craniate *distinct head, *tripartite brain *paired specialized sense organs *1 pair semicircular canals *glomerular kidney Vertebrate *2 pairs semicircular canals *vertebrae

  25. Habitat – Life History

  26. Hagfishes at home

  27. Slime glands and slime

  28. Hagfish Eggs

  29. Class Myxini 1 Family 6 genera hagfishes ca. 40 species Mxyine glutinosa L.

  30. Physiology very ‘invertebrate-like’

  31. Human interactions

  32. Hagfish fishery

  33. Eel Skin

  34. Vertebrata Vertebrates

  35. Vertebrata vertebrae at least 2 semicircular canals fancy, vertebrate physiology

  36. Lampreys are vertebrates

  37. Class Cephalaspidomorphi Lampreys

  38. Lampreys We have vertebrae

  39. Class Cephalaspidomorphi 2 families Lampreys 6 genera 41 species

  40. Local Diversity Lampetra tridentata

  41. California Diversity (freshwater) Lampetra similis Lampetraayresi Lampetra richardsoni

  42. Predaceous lampreys Brook lampreys

  43. Predaceous or parasitic life mode

  44. Predaceous lampreys

  45. Brook lampreys

  46. Lampreys nesting

  47. Ammocoete