Andrew langwell buchmann 0 water bear

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  • 1. Large carnivorous water bearMilnesium Tardigradum
    Andrew Langwell
    0 Period Biology
    Buchman
  • 2. Statisitics
    The carnivorous water bear is about 0.5-1 millimeters in size
    They are reddish or brownish in color
    Through cryptobiosis tardigrades can survive extreme radiation, lack of oxygen, dehydration, extreme temperatures, and high and low pressures.
  • 3. Habitat
    The carnivorous water bear is most commonly found in mosses and lichen but can be found all over the world from the Himilayas to the deep depths of the ocean.
  • 4. Food Source
    The carnivorous water bear preys on round worms, rotifers and other small water bears.
    • Round worms are attacked toward the middle of their body and their insides are sucked out, or if the round worm is smaller they are swallowed whole.
  • Reporduction
    Most water bears reproduce through self-fertilization.
    Eggs are also found on the shed cuticle of water bears.
    Eggs usually hatch
    in 30-40 days.
  • 5. Human Interaction
    Water bears have been used in soil to exterminate round worms.
    Humans took water bears into outer space to test if they could survive the vacuum of space.
  • 6. Interseting Facts
    Water bears can survive the vacuum of space, dehydration and don’t need oxygen.
    • They can also survive up to 570,000 roentgens which is 1000x the amount of radioactivity humans can survive.
  • Citations
    Kristensen, Reinhardt Møbjerg, and Martin Vinther Sørensen. "Tardigrada (Water Bears)." Grzimek's Animal Life Encyclopedia. Ed. Michael Hutchins, et al. 2nd ed. Vol. 2: Protostomes. Detroit: Gale, 2004. 115-123. Gale Virtual Reference Library. Web. 28 Apr. 2011.
    http://www.bryoecol.mtu.edu/chapters_VOL2/5-2Tardigrades_Reproduction_and_Food.pdf
    Photo Credits
    http://4.bp.blogspot.com/_Uw8lvivtudw/SM-jlrNA2OI/AAAAAAAAAGA/JiALFx6zBk4/s320/waterbear+-2.jpg
    http://www.sciencephoto.com/image/132606/350wm/C0069587-Water_bear_egg-SPL.jpg
    http://www.trekmovie.com/images/sciencesaturday/0711waterbear.jpg