2 Sea Turtles Class Reptilia Family Cheloniidae Family Dermochelyidae Species - Leatherback, Green, Black, Loggerhead, Kemp’s Ridley, Olive Ridley, Hawksbill, Flatback
3 Reptilia Characteristics EctothermicLungs or gills?3 - chambered heartlays eggs
4 Family Dermochelyidae Scute-less turtlesbackbone is NOT attached to the inside of the shellcapable of diving up to 1000 feet.ONLY the Leatherback
5 Family CheloniidaeTurtles with shells that are covered with scutes (horny plates)include all species but oneThis 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, estuarieslarge streamline shell - nonretractable head and limbsThis 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 yearsmigration is tracked by flipper tagging, radio transmitters, and satellitesfemales lay eggs at one time
8 Eggs are temperature dependant (cold = female warm = male) Incubation ranges from daysLow survival rate, many are eaten by dogs, ghost crabs, pigs, birds, humansBorn on full, bright moonlight nights
9 This Kemp’s Ridley is the smallest and most endangered. As few as 350 femalesShe 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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