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Sharks Sharks By Marla Batista The Facts  Class

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Sharks Sharks By Marla Batista The Facts  Class Powered By Docstoc
					 Sharks
By Marla Batista
                 The Facts
   Class Chondrichthyes
   750 Various Species
   Skeleton made of cartilage
   Bony razor sharp teeth
   Lateral line system
   Oil in liver to help them sink
   Sharp sense of sight and smell
   Cousins are the rays and skates
 Anatomy
of a Shark
          Ampullae of Lorenzini
 These are the jelly-
  filled pores all over a
  sharks body that
  detect the presence of
  other creatures
 They are the sharks
  sensory device and
  help them to sense the
  vibrations of fish in the
  water
            Shark     ATTACKS!
 They are not as
  common as people
  think
 However, they will be
  attracted to people if
  they think they look
  like a source of food or
  to protect themselves.
  Things to wear with caution at the
               beach
 Flippers and wet suits(look like seals)
 Silver jewelery(silver sides or other silvery
  fish)
 Bright colored swim suits(tropical fish)
 Do not have open cuts/wounds in
  water…blood will draw the sharks near!!!
           Alligators vs. Sharks
 From 1948-2003, there
  were 13 fatalities due
  to alligators in Florida.
 In this span of time,
  there were only 8
  Florida shark attack
  fatalities
           Lightning vs. Sharks
 In the span of time
  from 1959-2003, there
  have been 425
  fatalities due to
  lightning strikes in
  Florida.
 In the time, still only 8
  shark attack fatalities
  in comparison.
     What are people more prone to
               dying to?
   Bee stings
   Snake bites
   Sting ray stingers
   Dehydration
   LIGHTNING STRIKES!
     Localized Stock Depletion
 This is a fisheries
  concept that refers to
  the depletion of a
  species in a highly
  restricted part of its
  geographic range.
 Intensive fishing of
  degradation of habitat
  can cause the species
  to be “hole-punched” in
  specific locality.
                  A hypothesis

 Stated by the ICUN/SSC Shark Specialist Group
  of the Museum of Natural History in Gainesville,
  FL:
 “That many, if not most, shark species are
  philopatric for their natal nursery areas and other
  critical parts of their ranges, such as winter
  feeding grounds. This philopathy, furthermore,
  makes them even more susceptible to regional
  over fishing and habitat destruction.”
      National Shark Research
            Consortium
 Comprised of 4 major
  U.S Shark Research
  Organizations
 These oraganizations,
  together, are qualified
  to conduct studies of
  sharks and their
  relatives on national,
  international, and
  global scales.
                     Resources
 Http://www.oceanofk.org/s
  harks/sharkAnatomy/html.
 http://www.flmnh.ufl.edu/fis
  h/sharks/sharks.htm-
  website for Florida
  Museum of Natural History
  Ichthyology Department
 Notes from Dr. Ehringer
 Text Book-

				
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