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sharks

sharks and all about them

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sharks

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  1. Sharks and all about them By: Elizabeth Oddo

  2. Shark Feeding Habits • Feeding varies with each type of shark • Most sharks eat just about any fish or mammal they can find in the ocean • Most species eat once every couple of weeks and live off oil stored in their liver

  3. How Sharks Sleep • Some species swim while sleeping • Some shark gills force water in while not moving to allow sleep without swimming • All sharks do sleep

  4. How Sharks Move • The tail moves back and forth to move forward • When fins tilt down the shark moves down, when the fin tilts up the shark moves up • The dorsal fin (back) stabilizes movement for smooth motion

  5. Sharks Senses • A shark can smell blood and animal odors miles away • Sharks can hear sounds far better than humans, they can hear animals miles away from them • Eyesight varies from different types of sharks • Sharks taste rejects food that is not in their diet • Sharks can sense electric fields such as animals heartbeats

  6. Shark Attacks • Only 30 out of the 375 species of sharks have ever been known to attack • Sharks often bite humans by mistake then don’t bite again due to the human not being in their diet • Chances of being attacked by a shark are 1 in 264 million

  7. Types of Sharks • There are more than 440 types of sharks • They are grouped in eight orders: .Hexanchiformes .Squaliformes .Pristiophoriformes .Squatiniformes .Heterodontiformes .Orectolobiformes .Carcharhiniformes .Lamniformes

  8. Shark’s Life Span • Sharks lifespan’s vary widely • Sharks in captivity don’t live as long as sharks in the wild • Majority of species of sharks live 20 to 30 years • Whale sharks are thought to live over 100 years

  9. Is a Shark a Mammal or Fish? • Because a shark has cartilage instead of bone it is a fish • Sharks have no ribcage or lungs, instead they have gills • Sharks are cold blooded and sun bathe to warm themselves • Sharks lay eggs

  10. Bibliography • http://www.sharks-world.com/what_do_sharks_eat/ • http://skeptics.stackexchange.com/questions/8595/do-sharks-never-sleep • http://science.howstuffworks.com/zoology/marine-life/shark2.htm • http://science.howstuffworks.com/zoology/marine-life/shark3.htm • http://jeffreymasson.wordpress.com/2011/05/11/shark-attacks-whats-the-truth/ • http://www.sharks-world.com/how_many_species_of_sharks/ • http://www.sharks-world.com/how_long_do_sharks_live/ • http://animalquestions.org/fish/sharks/are-sharks-mammals-or-fish/

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