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Sharks - PowerPoint PPT Presentation


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Sharks. Are not bloodthirsty, killing machines…. How long have sharks been around?. 400 Million years!. How long do they live?. 15-100 years. Sharks senses. Dermal Denticles. hearing. smell. sight. touch. taste. * Lateral line. * Ampullae of lorenzini. Teeth. SHARK ATTACKS!.

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Presentation Transcript
slide7

Sharks

Are not bloodthirsty, killing machines…

slide8

How long have sharks been around?

400 Million years!

How long do they live?

15-100 years

slide10

Sharks senses

Dermal Denticles

hearing

smell

sight

touch

taste

* Lateral line

* Ampullae of lorenzini

shark attack facts
Shark Attack Facts
  • Sharks attack 50-75 people per year
  • 8-12 of the attacks are fatal
  • Humans are killing about 20 to 30 million sharks per year.
  • The odds of a shark attack death is 1 in 265 million.
how to stay safe
How to Stay Safe
  • If you’re bleeding, stay out of the water.
  • Avoid going in the water during dawn and dusk.
  • Avoid wearing shiny objects when in water.
  • Avoid swimming near large schools of baitfish.
  • Avoid swimming where others are fishing.
  • Swim/play with a group.
background information
Background Information
  • Found in the Pacific Ocean from California to the Gulf of Alaska
  • Eat small fish, squid, and some crustaceans
  • Give birth to 3-14 young every 2 years
  • Gestation period of 22-24 months
  • Live from 25-100 years
  • Females are usually larger than males
interesting facts
Interesting Facts
  • Fins of this species use to be used as sandpaper for sanding of wood materials
  • There are spines on the dorsal fins that may be mildly poisonous
  • Usually occur in packs of 100s or 1000s
  • If you order “Fish and Chips” in Europe you will probably get dogfish
  • Their liver can take up 90% of their body cavity
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Fins…Is one missing?

Male or Female?

slide20

The Liver

Right lobe

Left lobe

slide26

Pericardial

Cavity

The Heart