2-_Diversity_of_Fishes-Chap1 - TheDiversityofFishes...

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Click to edit Master subtitle style 9/14/10The Diversity of FishesIntroductionCh1, Ch8 DOF
 9/14/10Fish Trees
(1) Roughly what percentage of vertebrates are fish? Quiz!(2) Roughly what percentage of fishes live in 
freshwater?(3) Describe the changing morphology in the 
 9/14/10ontogeny of flatfishes
 9/14/10Phylogenetic definitionAll chordates are fish; however, for this class, we will limit the scope of “fish”  to occupy a phylogenetic position from cephalochordates  (lancelets) up to amphibians.
 9/14/10Fish Trees
 9/14/10Fish Trees
 9/14/10Fish TreesCraniata
 9/14/10Fishes have been around for nearly 500 million years (predating man by almost this entire period and all other vertebrates by nearly 100 million years)The vertebrate bauplan evolved from our aquatic fish ancestorsBody arrangement/jaws/limbsVertebrate eye/visionInternal fertilization/intrauterine nourishment/placentaFish Evolution
 9/14/10Table 1.1.
 9/14/1027,977 valid living species515 families62 orders108 jawless fish spp. (70 hagfish, 38 lamprey)970 cartilaginous fish spp. (403 sharks,534 skates, 33 chimeras)26,000 + bony fishesThe Diversity of Fishes
 9/14/1070% of the Earth’s surface is covered in waterFishes are found in all aquatic habitatsThermal alkaline springs 104° F (40° C) Soda Lake Cichlid – Tilapia spp.Antarctic Waters <0° F Caves/ground waterAnoxic swampsHydrothermal ventsHigh elevation (5km above sea level)Habitat of Fishes
 9/14/1041% of fishes live in freshwaters58 % seawater1% move between fresh and saltHabitat of FishesFWSWAvailable habitat0.01%        96%Diversity of fishes41%        58%
 9/14/101000 fold variation in length from Paedocypris progenetica and others of similar size 6-8 mm to the 12m Whale SharkBody mass just as Variation in Body Size
 9/14/10Diversity in Body FormsStructure without function is a corpse and function without structure is a ghost-Vogel and Wainwright (1969, p.93)
 9/14/10Body shape and locomotory behavior in fishes are determined by the extreme density of waterBody and appendage shape is not influenced by gravity like terrestrial animalsLocomotion: movement and shape

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Term
Fall
Professor
Chakrabarty
Tags
Morphology, Ichthyology, Body Forms, freshwaters, Coelacanths, Paedocypris progenetica

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