Marine Reptiles: Sea Turtles

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Presentation transcript:

Marine Reptiles: Sea Turtles

Last Time We introduced sea turtles We only went over 1 of the seven species (Hawksbill) We discovered some facts like how long they can hold their breath, a few physical features, reproductive methods and some directional side effects man-made lights can have on them But we have more species to go…

Green Sea Turtle

The Green Sea Turtle: The carapace ranges in color from black to gray to greenish brown. The plastron (shell on the underside) can be a yellowish white color. Facial marking are unique to each turtle.

Green Sea Turtle They can weight up to 300 lbs and reach a length of 3.5 feet. Green sea turtles have a wide range of habitat; they can live in the tropics or subtropics around North and South America, Africa, Europe and Asia. Adult green sea turtles are herbivores; they eat algae and marine plants. Juveniles are omnivores; they eat jellyfish, mollusks and sponges.

Green Sea Turtle They return to the same beach where they hatched to lay eggs. They are an endangered species in Florida and are on the threatened species list elsewhere. They can drown in nets; they are hunted for their meat and eggs. Beach development and destruction has contributed to the decreasing populations.

Leatherback Sea Turtle

Leatherback Sea Turtle It does not actually have a shell. The protective outer skin is leathery and scale-less. It is composed of tough oil-saturated tissue raised into seven prominent ridges. Its back is brownish-black with white spots.

Leatherback Sea Turtle They can weigh up to 1,100 lbs and reach a length of six feet. The largest ever recorded was nine feet. It is on the endangered species list. They are very widespread in the Pacific, Atlantic and Indian oceans. Primary food source is the jellyfish, especially the lion’s mane jellyfish.

Leatherback Sea Turtle The populations of this sea turtle are decreasing rapidly due to the fishing industry and netting techniques used, especially long line and gillnets. They are also known to mistake plastic bags as jellyfish and die from eating them. Some boating accidents occur They return to the same nesting site where they hatched.

Leatherback Sea Turtle Size when placed next to humans

Leatherback Sea Turtle Down the hatch

Leatherback Sea Turtle Result of impact with a boat

Loggerhead Sea Turtle

Loggerhead Sea Turtle Shell is brown to reddish brown in color. They can grow to a length of four feet and weigh up to 250 lbs. Loggerheads are a threatened species they are listed under the endangered species act.

Loggerhead Sea Turtle It is the most worldwide sea turtle, found throughout the world’s oceans in lagoons, bays and the open ocean. Most commonly found in Florida. They eat crabs, mollusks, jellyfish, sea urchins, sponges and shrimp.

Loggerhead Sea Turtle The main nesting grounds are found on the east coast of Florida. Threats include turtles getting caught in fishing nets, beach and ocean pollution and boats.

Exit questions Pick two of the turtles we went over today (give the proper name of each) Describe the carapace: What is the length and weight of these turtles? What is their range? What do they eat? What type of threats are listed for these turtles?