part 3 “fishes” – an introduction. “fishes” vertebrata
TRANSCRIPT
- Slide 1
- Part 3 Fishes an introduction
- Slide 2
- Fishes
- Slide 3
- Vertebrata
- Slide 4
- Figure 24.2 Vertebrata Fishes
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- Fish Diversity ca. 25,000 described species 482 families with living representatives
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- Largest > 12m Smallest < 1cm
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- Largest > 12m Smallest < 1cm
- Slide 8
- 8,370m (27,455 feet) Deepest Abyssobrotula galatheae Highest 5,200m (17,000 feet)
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- Hottest Coldest up to 43.8 C (110.8F) -1.86 C (28.6F) Cyprinodon pachycephalus
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- Hypersaline Cyprinodon variegatus Up to 3x sea water
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- Torrential water Colorado River Fishes
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- Trogloglanis pattersoni Satan eurystomus Caves
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- Anoxic water
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- Airbreathing
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- 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
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- Vertebrata Vertebrates
- Slide 38
- Vertebrata at least 2 semicircular canals vertebrae fancy, vertebrate physiology
- Slide 39
- Lampreys are vertebrates
- Slide 40
- Class Cephalaspidomorphi Lampreys
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- We have vertebrae
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- 2 families 6 genera 41 species Lampreys Class Cephalaspidomorphi
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- Lampetra tridentata Local Diversity
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- 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
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- Most Jawless fishes are fossil only
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- All sorts of fossil jawless fishes
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- Mineralized bone
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- Hagfishes and lampreys (living) Fossil things Ostracoderms and conodonts
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- Condodonta Earliest vertebrate ? (with bone)
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- Condodonta
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- earliest bone
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- Ostracoderms Fossil jawless fishes were more sophisticated that the surviving ones
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- Hagfishes and lampreys (living) Fossil things
- Slide 65
- *Smallish *Bony armor *Internal cartilaginous skeleton Ostracoderms *Mostly benthic
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- Ostracoderms - niche
- Slide 67
- Ostracoderms 2 major radiations More primitive More advanced
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- 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