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Presentation on theme: "SEA TURTLES."— Presentation transcript:


2 Sea Turtles Class Reptilia Family Cheloniidae Family Dermochelyidae
Species - Leatherback, Green, Black, Loggerhead, Kemp’s Ridley, Olive Ridley, Hawksbill, Flatback

3 Reptilia Characteristics
Ectothermic Lungs or gills? 3 - chambered heart lays eggs

4 Family Dermochelyidae
Scute-less turtles backbone is NOT attached to the inside of the shell capable of diving up to 1000 feet. ONLY the Leatherback

5 Family Cheloniidae Turtles with shells that are covered with scutes (horny plates) include all species but one This is a flatback turtle

6 Sea Turtles Fossil records date back to 208 - 245 million years ago
warm/ temperate regions - shallow coastal waters, bays, lagoons, estuaries large streamline shell - nonretractable head and limbs This is a green turtle

7 Leave water only to lay eggs
migrate long distances to lay eggs in the same nesting areas every 2-3 years migration is tracked by flipper tagging, radio transmitters, and satellites females lay eggs at one time

8 Eggs are temperature dependant (cold = female warm = male)
Incubation ranges from days Low survival rate, many are eaten by dogs, ghost crabs, pigs, birds, humans Born on full, bright moonlight nights

9 This Kemp’s Ridley is the smallest and most endangered.
As few as 350 females She will only lay eggs at Rancho Nuevo, Mexico.

10 Males have a larger tail because the male reproductive organs are at the base of the tail.
Turtles have great vision underwater but not above. Size ranges from 22 inches to 7 feet (leatherback)

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