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Leatherback Sea Turtle - PowerPoint PPT Presentation


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Leatherback Sea Turtle. By: Sam Lee. Body Description. Largest of all living sea turtles. Can reach up to 6 feet. Can weigh up close to a ton (largest ever recorded weighed in at 2,019 lbs). Shell feels leathery, often covered with white or yellow spots. Circulatory System.

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Presentation Transcript
body description
Body Description
  • Largest of all living sea turtles.
  • Can reach up to 6 feet.
  • Can weigh up close to a ton (largest ever recorded weighed in at 2,019 lbs).
  • Shell feels leathery, often covered with white or yellow spots.
circulatory system
Circulatory System
  • Leatherbacks are thermoregulators and can therefore adapt their circulation capabilities to maintain a stable core body temperature above freezing in extreme temperatures.
  • Leatherback turtles have been reported to have the ability to slow their heart rate down to the point where almost nine minutes may pass between beats
  • Blood flow is also shunted away from non vital tissues and organs and is directed towards the heart, brain and nervous system
reproduction
Reproduction
  • In the United States, nesting occurs from about March to July.
  • Female leatherbacks nest an average of 5 to 7 times within a nesting season, with an observed maximum of 11 nests.
  • Nests are constructed at night in clutches of about 70 to 80 eggs measuring 2 inches in diameter.
growth development
Growth/Development
  • External
  • Leatherbacks are believed to reach sexual maturity in 6 to 10 years
  • Incubation takes 55 to 75 days, and emergence of the hatchlings occurs at night.
taxonomy
Taxonomy
  • Kingdom: Animalia
  • Phylum: Chordata
  • Class: Sauropsida
  • Order: Testudines
  • Suborder: Cryptodira
  • Family: Dermochelyidae
  • Genus: Dermochelys
  • Species: Coriacea
habitat
Habitat
  • Adult females require sandy nesting beaches backed with vegetation.
  • The preferred beaches have proximity to deep water and generally rough seas.
why is it endangered
Why is it Endangered?
  • The crash of the leatherback population, once the world’s largest population, is believed primarily to be the result of exploitation by humans for eggs and meat.
  • Loss of nesting habitat from coastal development.
  • Marine pollution and debris.