part 3 “fishes” – an introduction. “fishes” vertebrata

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  • Slide 1
  • Part 3 Fishes an introduction
  • Slide 2
  • Fishes
  • Slide 3
  • Vertebrata
  • Slide 4
  • Figure 24.2 Vertebrata Fishes
  • Slide 5
  • Fish Diversity ca. 25,000 described species 482 families with living representatives
  • Slide 6
  • Largest > 12m Smallest < 1cm
  • Slide 7
  • Largest > 12m Smallest < 1cm
  • Slide 8
  • 8,370m (27,455 feet) Deepest Abyssobrotula galatheae Highest 5,200m (17,000 feet)
  • Slide 9
  • Hottest Coldest up to 43.8 C (110.8F) -1.86 C (28.6F) Cyprinodon pachycephalus
  • Slide 10
  • Hypersaline Cyprinodon variegatus Up to 3x sea water
  • Slide 11
  • Torrential water Colorado River Fishes
  • Slide 12
  • Trogloglanis pattersoni Satan eurystomus Caves
  • Slide 13
  • Anoxic water
  • Slide 14
  • Airbreathing
  • Slide 15
  • Diet
  • Slide 16
  • Reproduction
  • Slide 17
  • Life Spans several weeks 150+ years
  • Slide 18
  • Primitive and early fishes
  • Slide 19
  • Living jawless fishes = agnatha
  • Slide 20
  • Jawless Fishes (living)
  • Slide 21
  • Slide 22
  • Class Myxini Hagfishes
  • Slide 23
  • Were craniates, but not vertebrates
  • Slide 24
  • *distinct head, *tripartite brain *paired specialized sense organs *1 pair semicircular canals *glomerular kidney *2 pairs semicircular canals *vertebrae Craniate Vertebrate
  • Slide 25
  • Slide 26
  • Slide 27
  • Habitat Life History
  • Slide 28
  • Hagfishes at home
  • Slide 29
  • Slime glands and slime
  • Slide 30
  • Hagfish Eggs
  • Slide 31
  • Mxyine glutinosa L. 1 Family 6 genera ca. 40 species Class Myxini hagfishes
  • Slide 32
  • Physiology very invertebrate- like
  • Slide 33
  • Human interactions
  • Slide 34
  • Hagfish fishery
  • Slide 35
  • Eel Skin
  • Slide 36
  • Slide 37
  • Vertebrata Vertebrates
  • Slide 38
  • Vertebrata at least 2 semicircular canals vertebrae fancy, vertebrate physiology
  • Slide 39
  • Lampreys are vertebrates
  • Slide 40
  • Class Cephalaspidomorphi Lampreys
  • Slide 41
  • We have vertebrae
  • Slide 42
  • 2 families 6 genera 41 species Lampreys Class Cephalaspidomorphi
  • Slide 43
  • Lampetra tridentata Local Diversity
  • Slide 44
  • Lampetra similis Lampetra ayresi Lampetra richardsoni California Diversity (freshwater)
  • Slide 45
  • Predaceous lampreys Brook lampreys
  • Slide 46
  • Predaceous or parasitic life mode
  • Slide 47
  • Predaceous lampreys
  • Slide 48
  • Brook lampreys
  • Slide 49
  • Lampreys nesting
  • Slide 50
  • Ammocoete
  • Slide 51
  • Lamprey ammocoete larva Cephalochordate (amphioxus) Craniate Origin?
  • Slide 52
  • Ammocoete Amphioxus Niche + anatomy
  • Slide 53
  • Biodiversity and Conservation Lampreys have an image problem
  • Slide 54
  • Great Lakes and sea lampreys
  • Slide 55
  • Slide 56
  • Most Jawless fishes are fossil only
  • Slide 57
  • All sorts of fossil jawless fishes
  • Slide 58
  • Mineralized bone
  • Slide 59
  • Hagfishes and lampreys (living) Fossil things Ostracoderms and conodonts
  • Slide 60
  • Condodonta Earliest vertebrate ? (with bone)
  • Slide 61
  • Condodonta
  • Slide 62
  • earliest bone
  • Slide 63
  • Ostracoderms Fossil jawless fishes were more sophisticated that the surviving ones
  • Slide 64
  • Hagfishes and lampreys (living) Fossil things
  • Slide 65
  • *Smallish *Bony armor *Internal cartilaginous skeleton Ostracoderms *Mostly benthic
  • Slide 66
  • Ostracoderms - niche
  • Slide 67
  • Ostracoderms 2 major radiations More primitive More advanced
  • Slide 68
  • Primitive ostracoderms
  • Slide 69
  • Advanced ostracoderms
  • Slide 70
  • Jawed vertebrates derive from ostracoderms More advanced
  • Slide 71
  • on to creatures with jaws. Jawed vertebrates
  • Slide 72
  • Early gnathostomes