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Transcript of Sea Turtles
Predators & Prey
Green Sea Turtles are endangered
Main threat is humans
Its meat and eggs are used as food for people
Although illegal, capturing of them still happens
Pollution and humans interference in the nesting area of them is the biggest problem
Incidental capture in fishing nets
The destruction of nesting grounds
Among the largest sea turtles in the world
Average life span is over 80 years old
Can weigh up to 700 lb and be as long as 5 ft
They can not pull their head or flippers into their shells
Males are slightly larger than females and have a longer tail
Both have flippers that resemble paddles, which make them powerful and graceful swimmers.
Unlike most sea turtles, adult green turtles are herbivores
Juvenile green turtles, however, are omnivores and will eat invertebrates such as crabs, jellyfish, and sponges.
Green sea turtles move across three habitat types, depending on their life stage
Lay eggs on beaches, hatchlings make their way to sea
Mature turtles spend most of their time in shallow, coastal waters with lush sea grass beds
Adults can be found in inshore bays, lagoons, and shoals with lush sea grass meadows
Green sea turtles are found around the world in warm subtropical and tropical ocean waters
There are populations with different colorings and markings in the Atlantic, Indian and Pacific Oceans.
Green Sea Turtles
Crabs, racoons, dogs, some birds, etc. eat eggs and hatchlings
Sharks and humans eat adults
Juveniles eat crabs, jellyfish, sponges, and plants
Adults eat sea grasses and algae
Undertakes lengthy migrations from feeding sites to nesting grounds, normally on sandy beaches
One of the best studied migratory populations feeds along the Brazilian coast but nests on Ascension Island
Green Sea Turtles exhibit a type III survivorship curve
Exhibit both r and K traits