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Sharks PowerPoint Presentation

Sharks

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Sharks

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Presentation Transcript

  1. Sharks Are not bloodthirsty, killing machines…

  2. How long have sharks been around? 400 Million years! How long do they live? 15-100 years

  3. Sharks senses Dermal Denticles hearing smell sight touch taste * Lateral line * Ampullae of lorenzini

  4. Teeth

  5. SHARK ATTACKS!

  6. 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.

  7. 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.

  8. Dogfish Shark Dissection

  9. 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

  10. 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

  11. Fins…Is one missing? Male or Female?

  12. Internal Anatomy

  13. The Liver Right lobe Left lobe

  14. The Stomach

  15. The Pancreas

  16. The Spleen

  17. The Intestine

  18. The Kidney

  19. Pericardial Cavity The Heart

  20. The Brain

  21. Internal Anatomy

  22. Frill Shark