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Shark’s power point final


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Shark’s power point final

  1. 1. Sharks <ul><li>Sharks ( Selachimorpha) The earliest known sharks date back far as 420 million years ago. That’s before the Dinosaurs. </li></ul><ul><li>Sharks were called “sea Dogs” by sailors until the 16 th century. </li></ul><ul><li>The name Shark was first used by Sir John Hawkins when he exhibited a specimen in London in 1569. </li></ul>
  2. 2. Sharks Teeth <ul><li>Sharks have the most powerful jaws on the planet. </li></ul><ul><li>Unlike most animals jaws, both the sharks upper and lower jaws move. </li></ul><ul><li>Sharks have 5 to 15 rows of teeth in each jaw . </li></ul>
  3. 3. Dinner Time <ul><li>Usually Sharks eat alone. </li></ul><ul><li>But sometimes one feeding shark attracts others . </li></ul><ul><li>They will bite at almost anything that gets in their way – even each other. </li></ul>
  4. 4. Gentle Giants <ul><li>Not all sharks are carnivores </li></ul><ul><li>Funny as it may sound the most harmless sharks tend to be the biggest. </li></ul><ul><li>They are the Whale Shark, Basking Shark, Megamouth Shark. </li></ul><ul><li>They all have a diet of shrimp and plankton. </li></ul>
  5. 5. Dangerous Predators <ul><li>The Great White , Tiger, Hammerhead, Mako and the Bull Shark are the biggest Predators. </li></ul><ul><li>About 100 shark attacks each year. </li></ul><ul><li>10 result in human deaths. </li></ul><ul><li>In perspective people kill thousands of sharks in one year . </li></ul><ul><li>For instance Shark Fin Soup Shark Steaks. </li></ul><ul><li>The most popular shark in the U.S.A is the Mako. </li></ul><ul><li>Now who is the most dangerous predator ? </li></ul>
  6. 6. Super senses <ul><li>Why are Sharks so successful Predators? </li></ul><ul><li>A Shark uses two – thirds of its brain for its senses :- smell. </li></ul><ul><li>They feel vibrations in the water by using a line of canals that go from the head to the tail. </li></ul><ul><li>Called a “lateral line”. </li></ul><ul><li>They also have a sensory organ known has the “ Ampullae of Lorenzini”. </li></ul><ul><li>Ampullae detects the electric field of its prey. </li></ul>
  7. 7. A few less known Sharks <ul><li>The Sand Tiger Shark </li></ul><ul><li>10 feet long. </li></ul><ul><li>Hunts at night. </li></ul>
  8. 8. Wobbegong Shark <ul><li>Grows about 8 feet long (2.4mths). </li></ul><ul><li>Lies at the bottom of the sea. </li></ul><ul><li>It has a worm like projections on its head to attract its prey </li></ul>
  9. 9. Zebra Shark <ul><li>You can keep this gentle small shark in aquariums. </li></ul><ul><li>The tail of this shark is half its length of its body. </li></ul>
  10. 10. Shark sizes
  11. 11. The end <ul><li>Well I hope you have enjoyed my slides show on Sharks. </li></ul><ul><li>I would like to take a couple of minutes more of your time to watch a short video. </li></ul>
  12. 12. Sources <ul><li>http:// </li></ul><ul><li> </li></ul><ul><li> </li></ul><ul><li>http:// = sand+tiger+shark&sourceid =Mozilla-search# </li></ul><ul><li> </li></ul><ul><li>http:// /wiki/Sharks </li></ul><ul><li>http:// = sharks&sourceid =Mozilla-search </li></ul>