By Sami Cook, Michelle Matuszyk, and Caleb Streitmatter

1
Mrs. Chumleys Shark Attack, Fact or Fiction?

• By Sami Cook, Michelle Matuszyk, and Caleb
  Streitmatter

2
Senses

• Smell-nostrils on bottom of snout draws in water
  into olfactory sacs which detect smell
• Vision-similar to human eyes but have structure
  called tapetum lucidum that increases sensitivity
  to light, can see 50-60 ft. underwater
• Touch/Feel-skin made of dermal denticles to
  provide hydrodynamic skin surface
• Electrosensory-highly specialized bioelectrical
  system used to detect/find prey by detecting
  electrical currents within electrical fields
• Hearing-ears located inside the head, has
  sensitive mechanism for interpreting sounds-can
  hear from kilometers away because sound travels
  faster underwater
• Taste-can tell energy content of prey on first
  bite in order to calculate benefits to shark of
  killing that particular prey

3
(No Transcript)
4
Habitat

• The Great White Shark usually lives near the
  shore. Its location is located by the red on the
  map above.

5
Diet

• Fish-Salmon, Hake, Halibut, Mackerel, and Tuna
• Marine Mammals- Harbor Porpoises/Seals, Other
  Sharks, Sea Turtles/Birds
• Mollusks
• Blubber from dead whale carcasses

6
Victim
7
Shark
8
Marine Biologist

• Dear Diary
• - After listening to the boy recount his shark
  encounter, I do not even think that it was a
  Great White that bit him. The boy wasnt
  completely sure if it was a shark anyway. Great
  White sharks are solitary animals, and it is not
  likely that it would be near the shore if there
  were many people around.

9

• Great White shark diets mainly consist of
  marine mammals and fish. It doubtful that the
  shark mistook the boy for food because sharks
  have very keen senses, mainly relying on their
  sense of smell. Humans are definitely not a part
  of a sharks diet, and I feel that the boy just
  wanted to tell a good story and get some
  attention and sympathy.

10
Sheriff

• Dear Diary,
• Today a young man claimed to have been attacked
  by a Great White Shark. Im not sure whether I
  believe him because those sharks are not known to
  attack human beings. They choose to prey on
  smaller animals with high energy level contents.

11

• However, he was surfing in the ocean where the
  sharks usually live although he may have been too
  close to the shore for the shark to reach him.
  Furthermore, he has no teeth marks from this
  alleged attack. If a Great White Shark had bitten
  and released him, he would have been severely
  hurt by that single bite. I do not believe this
  attack actually happened I think the teenager is
  trying to get attention.