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Pacific Leatherback Sea Turtles A Presentation By 3A and 3B
 
Leatherback Range <ul><li>60 days to the Galapagos Islands where they winter and mate </li></ul><ul><li>Nest in Costa Rica...
The Diving Machine <ul><li>Deepest diving reptile </li></ul><ul><li>4000ft and deeper </li></ul><ul><li>Leather-like shell...
Threats to Diving <ul><li>Hooks from long line fishing </li></ul><ul><li>Fishing nets </li></ul>
 
Decline 1980: 200 turtles a night 7 days in a week 7 x 200 =1,400 turtles in a week 2011:  3 turtles in the week
 
Size Comparison
Turtle Decline
 
 
 
Leatherback munch on jellyfish!
 
Nesting <ul><li>Females come every 2-4 years to lay </li></ul><ul><li>Return every 9-10 days </li></ul><ul><li>Lay 50-85 e...
Threats to Nests <ul><li>Human poachers take eggs </li></ul><ul><li>Dogs </li></ul><ul><li>Raccoons </li></ul><ul><li>Coat...
Hatchlings <ul><li>Take 60 days to develop </li></ul><ul><li>Largest of all turtle hatchlings </li></ul><ul><li>57% succes...
Threats to Hatchlings <ul><li>Raccoons </li></ul><ul><li>Birds: pelicans, ospreys, seagulls </li></ul><ul><li>Fish </li></...
 
 
 
 
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Turtle Assembl y

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Transcript of "Turtle Assembl y"

  1. 1. Pacific Leatherback Sea Turtles A Presentation By 3A and 3B
  2. 3. Leatherback Range <ul><li>60 days to the Galapagos Islands where they winter and mate </li></ul><ul><li>Nest in Costa Rica </li></ul>
  3. 4. The Diving Machine <ul><li>Deepest diving reptile </li></ul><ul><li>4000ft and deeper </li></ul><ul><li>Leather-like shell that compresses under deep water pressure </li></ul><ul><li>Fatty insulation helps control body temp </li></ul><ul><li>Stays under water for 80 minutes </li></ul>
  4. 5. Threats to Diving <ul><li>Hooks from long line fishing </li></ul><ul><li>Fishing nets </li></ul>
  5. 7. Decline 1980: 200 turtles a night 7 days in a week 7 x 200 =1,400 turtles in a week 2011: 3 turtles in the week
  6. 9. Size Comparison
  7. 10. Turtle Decline
  8. 14. Leatherback munch on jellyfish!
  9. 16. Nesting <ul><li>Females come every 2-4 years to lay </li></ul><ul><li>Return every 9-10 days </li></ul><ul><li>Lay 50-85 eggs </li></ul><ul><li>Lay largest eggs of all turtles </li></ul><ul><li>Billiard-size eggs </li></ul><ul><li>Laying takes 1.5-2 hours </li></ul>
  10. 17. Threats to Nests <ul><li>Human poachers take eggs </li></ul><ul><li>Dogs </li></ul><ul><li>Raccoons </li></ul><ul><li>Coatis </li></ul><ul><li>Houses built near nests that produce white lights </li></ul><ul><li>Bright lights from cars </li></ul>
  11. 18. Hatchlings <ul><li>Take 60 days to develop </li></ul><ul><li>Largest of all turtle hatchlings </li></ul><ul><li>57% success rate of hatching normally </li></ul><ul><li>Temperature determines sex </li></ul><ul><li>After hatching, they swim vigorously for </li></ul><ul><li>6-8 days to get to the main currents which take them to their feeding ground </li></ul>
  12. 19. Threats to Hatchlings <ul><li>Raccoons </li></ul><ul><li>Birds: pelicans, ospreys, seagulls </li></ul><ul><li>Fish </li></ul><ul><li>Nests that are too shallow so they get too hot and eggs die </li></ul><ul><li>Crabs </li></ul><ul><li>Nests too near water line so they drown </li></ul>
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