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Myths about Sharks

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Myths about Sharks Myth: Sharks eat Humans Fact: Most sharks do like meat but fish, squid, seal, porpoise, or whale make a shark s perfect meal. – PowerPoint PPT presentation

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Title: Myths about Sharks


1
Myths about Sharks
2
Myth Sharks eat Humans
  • Fact Most sharks do like meat but fish, squid,
    seal, porpoise, or whale make a sharks perfect
    meal. Some sharks, like the giant whale and
    basking sharks, only eat tiny plankton. Some
    sharks can go days or weeks without eating at
    all. Contrary to public perception, sharks attack
    less than a hundred people a year on average.
    Often the attacks are accidental and are rarely
    fatal. In fact, more people are killed each year
    by dogs, lightning, and even falling soda
    machines and coconuts than by shark attacks!

3
Myth Shark Attacks are Common
  • Fact In the Us there is only 1 fatal shark
    attack per year, whereas humans kill over 100
    million sharks per year.
  • Fact a person's chance of getting attacked by a
    shark is 1 in 11.5 million, and a person's chance
    of getting killed by a shark is 1 in 264.1
    million.

4
Myth All sharks species attack humans
  • Fact Of the more then 350 shark species, about
    80 percent are unable to hurt people or rarely
    encounter people.
  • the great white, tiger, bull and the oceanic
    whitetip, are the only Species that usually
    attack.

5
Shark Safety
  • Avoid the water at dawn, dusk, or night, when
    sharks tend to feed.
  • Avoid areas where sharks generally locate
    themselves, such as murky waters and steep
    drop-offs.
  • Don't swim alone, always be near a group of
    people, and if possible, avoid being at the edge
    of the group.
  • Obey instructions from lifeguards and other
    authority.
  • It is known that when dolphins are seen, sharks
    are usually nearby.

6
Shark Finning
  • Sharks are being driven to the brink of
    extinction due to a huge increase in demand for
    their fins over the last 20 years.
  • The practice of Shark Finning is an extremely
    cruel one, where the animals are caught, their
    fins are cut off and they are thrown back to sea
    for a slow, painful death.

7
Ways to Help Sharks
  • don't eat shark fin soup! Talk to your friends
    about shark fin soup and remember Friends don't
    let friends eat shark fin soup!
  • Don't patronize restaurants that serve the dish.
    Very often people are unaware of the effect that
    their eating habits have on the environment.
  • If you see any of the typical "man bitten by
    shark" news items on TV, contact the TV station
    and ask them to produce a news item about shark
    finning. Remember - only about 10 people a year
    are killed by sharks, but 3 sharks are killed
    every second by humans.

8
Myth Sharks are Plentiful
  • Fact Many shark species are endangered because
    of pollution, loss of habitat, and excessive
    fishing in their environments. Furthermore, the
    loss of sharks imperils many ocean ecosystems
    since sharks play a key role in culling sick
    animals and keeping other populations in check.

9
Myth Sharks Need to Keep moving to breathe
  • Fact All sharks do need water moving over their
    gills to breathe, but some species can pump water
    over their gills by opening and closing their
    mouths while resting.

10
Myth All sharks can smell Blood from Miles away
  • Fact Some sharks do have a highly developed
    sense of smell, which helps them hunt in the dark
    and detect their prey. Other sharks dont depend
    on their sense of smell for foraging. All Sharks
    use the Ampullae of Lorenzini nodes on their
    noses to detect the electromagnetic fields that
    all living things produce.

11
Myth Sharks Have poor vision
  • Fact Sharks' eyes, which are equipped to
    distinguish colors, employ a lens up to seven
    times as powerful as a human's, and some shark
    species can detect a light that is as much as ten
    times dimmer than the dimmest light the average
    person can see.

12
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13
A diver with a huge, Docile Whale Shark
ampullae of lorenzini on a sharks snout
14
Cut out images on two previous pages, and display
next to matching info sheets Do not print this
sheet or the following Sheets.
Created and Designed by Bonnie
Sizer Bonnie.sizer_at_gmail.com Resident Assistant
Colorado State University
See pictures on next slides
15
How I set up my bulletin Board
16
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