1 / 20

Hawaiian Shawks

Hawaiian Shawks. Varun Manohara. Do You know your sharks? T/F?. Most sharks are dangerous to people. False !. Of the roughly 450 species in the wild, only 30 types have been responsible for biting, and only 3 (tiger, white, bull) are particularly dangerous. Do You know your sharks? T/F?.

parson
Download Presentation

Hawaiian Shawks

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Hawaiian Shawks Varun Manohara

  2. Do You know your sharks? T/F? • Most sharks are dangerous to people • False! • Of the roughly 450 species in the wild, only 30 types have been responsible for biting, and only 3 (tiger, white, bull) are particularly dangerous

  3. Do You know your sharks? T/F? • Sharks have bones • False! • Sharks are 100% cartilage, no bones

  4. Do You know your sharks? T/F? • Should you hit a shark to make it go away • TRUE! • Aim for the the eyes, snout, and gills as a LAST RESORT • DISCLAIMER: They might get aggressive, so violence is probably not the best option

  5. Do You know your sharks? T/F? • You’re more likely to be struck by Lightning than bit by a shark in Hawaii. • FALSE • Due to few electrical storms in Hawaii, people are almost never hit by lightning, but watch out for falling coconuts because they are more likely to injure you than a shark

  6. Do You know your sharks? T/F? • Do sharks attack submarines? • TRUE • Sharks are drawn toward the electromagnetic fields, visual stimuli, or sounds produced by submarines or underwater cables

  7. 7 Senses of the Shark • 1) Vision- • More Efficient than night hunting mammals like cats, wolves, or foxes • 0-50 meter range • Can amplify light in their eyes

  8. 7 Senses of the Shark • 2) Scent- • Can smell certain things 10,000 better than humans • 3) Taste- • Very Picky Eaters

  9. 7 Senses of the Shark • 4) Electrosense- • Only sharks and rays have an electrosensor called Lorenzini ampoules • Located near snout • Jelly like substance filling canal with attached pores

  10. 7 Senses of the Shark • 5) Hearing- • Sounds move faster in water then land • Sharks can hear their prey over a distance of several hundred meters

  11. 7 Senses of the Shark • 6) Touch- • Sharks can notice very slight changes as sensitive as 0.02 mm skin vibrations/movement

  12. 7 Senses of the Shark • 7) Pressure Sensors- • Lateral Line-from the head to the caudal fin, sensory cells are embedded in jelly and connected to the skin by pores. Jelly conducts shock waves • Pit Organs-Register mechanical stimuli such as water currents

  13. MANEATERS • Only 2 or 3 attacks per year in Hawaii • Revered as past ancestors by Hawaiian culture • 'aumakua

  14. Sandbar Sharks • Average size 4-6 feet, maximum 8 feet • Quick and agile • Most likely to be seen at a shark feed such as the one organized off Haleiwa in Hawaii

  15. WhitetipReef Sharks • Up to 6 feet; averages 2-3 feet • Eats: Reef fishes, octopuses • Shoreline; shallow reefs

  16. Scalloped Hammerhead Sharks • Found in almost all tropical and warmer temperate regions of the world. • 5 to 10 feet long • Only shark to school: • Social? • Hunt alone though…

  17. TIGER Sharks • Rare, but most dangerous in Hawaii • From Fall to Spring: In-shore Waters • Seem to feed most in night and twilight hours • Not very picky eaters fish, lobsters, birds, turtles, dead animals even garbage

  18. Sharks relationship to Environment • Regulate the number of fish in the environment • Cull the weak and injured fish so only the strongest fish live, grow, and mate for future generations

  19. Shark Threats • Human Fishing • Over fishing • Accidental bycatch • Average 25-30 years • Vicious cycle • Research Conservation Methods

  20. Bibliography • www.shark.ch/Information/Senses/index.html • http://www.aloha.com/~lifeguards/sharintr.html • http://www.hawaiisharks.com/quiz.html • http://gohawaii.about.com/od/mauiocean/a/shark_attacks.htm

More Related