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SEA TURTLES. Sea Turtles Class Reptilia Family Cheloniidae Family Dermochelyidae Species - Leatherback, Green, Black, Loggerhead, Kemps Ridley, Olive.

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Presentation on theme: "SEA TURTLES. Sea Turtles Class Reptilia Family Cheloniidae Family Dermochelyidae Species - Leatherback, Green, Black, Loggerhead, Kemps Ridley, Olive."— Presentation transcript:

1 SEA TURTLES

2 Sea Turtles Class Reptilia Family Cheloniidae Family Dermochelyidae Species - Leatherback, Green, Black, Loggerhead, Kemps 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 100 - 160 eggs at one time

8 Eggs are temperature dependant (cold = female warm = male) Incubation ranges from 45 - 70 days Low survival rate, many are eaten by dogs, ghost crabs, pigs, birds, humans Born on full, bright moonlight nights

9 This Kemps 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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