Gnawing mammals
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Gnawing mammals

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Gnawing mammals Gnawing mammals Presentation Transcript

  • Gnawing Mammals
  • Mammals
    Warm blooded
    Have a bony skeleton
    Have a coat of hair
    Babies drink milk secreted by mothers mammary glands
    Viviparous - Young are born live
    (not in eggs)
  • Types of Gnawing Mammals
    Rodents: consists of the following families:
    Mice, rats, voles
    Squirrels
    Marmots & prairie dogs
    Porcupines
    Beavers
    Rabbits, hares, & pikas
    View slide
  • Characteristics of Rodents
    4 large incisor teeth
    Teeth never stop growing
    Double layers
    Front edge is sharper than back edge
    Self sharpen with gnawing
    Must gnaw to keep teeth worn down
    View slide
  • Gnawing mammals
    Herbivores
    Major prey species
    r-selected population growth
    Numerous off-spring
    Low parental care
    Early reproduction
    Short life-span & high mortality
    Maximum population below carrying capacity