Endangered Olive Ridley Sea Turtles By: Sophia Sakopoulos & Isabelle Smith Robert Louis Stevenson...
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Transcript of Endangered Olive Ridley Sea Turtles By: Sophia Sakopoulos & Isabelle Smith Robert Louis Stevenson...
Endangered Olive Ridley Sea Turtles
By: Sophia Sakopoulos & Isabelle SmithRobert Louis Stevenson Middle School
2nd Period4th Quarter
The Olive Ridley Sea Turtle
Basic Facts Common name: Olive Ridley Scientific name: Lepidochelys Olivaceaf Named after it’s olive green shell Adults get to about 2 to 2.5 feet Adults weigh 77-100 pounds
Interesting Facts When they are born their shells are grey
they turn all green They have two visible claws on each
flipper They are related to the Kemp’s Ridley but
Olive Ridleys live in warm water They are the smallest sea turtles weighing
up to 100 pounds They usually live 50 years Males tails stick up behind their shells
Why Endangered? In India people are building a huge deep water
port and the mouth of the Dharma River The largest Olive Ridley nesting beach is there Every winter half a million of the turtles meet in
the shallow water then the females travel for the Arribada
For the first time in 2008 there were was no Arribada
Oil spills, people taking the eggs, litter, and artificial light are preventing the Olive Ridley sea turtles to survive
Human Impact Females and babies are disturbed by trash on nesting
beaches left by humans If a piece of trash is close enough to a female she will
return to the ocean and not nest Turtles die when they eat trash mistaking it for jellyfish Noise is bad and has the same effect Thousands of sea turtles get caught in fishing nets and die They are effected by artificial lights on beaches People illegally collect turtle eggs for food They are also hunted for meat, shells, and fat Propellers also hit sea turtles injuring them and making
them vulnerable to attack
Habitat They are often found in
coastal bays and estuaries They typically forge in
surface waters or dive into depths of 500ft on the bottom eating crustaceans
They live in the Pacific, Indian, and Atlantic oceans
They like muddy or sandy bottoms where prey can be found
Mating and Birth Cycle Turtles don’t form couples Neither sex provide parenting after nesting The male only provides the sperm The female leaves the eggs once they are laid Females look for good genetic qualities in
males so their babies will be smart, tricky, sly, and brave
Females lay 50-100 eggs The eggs hatch 45-70 days after they are laid It takes them several day to dig themselves
out of the hole
Video http://www.youtube.co
m/watch?v=UhsxVpZb-cQ
Nesting One of the most extraordinary nesting in the
world is the Olive Ridley Large groups of turtles gather off shore then all
of the sudden thousands of female turtles come ashore and nest
The nesting is known as an Arribada During Arribada females come to lay eggs The nesting density is so high that females will
dig up old eggs to lay new ones No one knows what triggers and Arribada
Food Web
Algae
Small FishCrustaceansMollusks Jellyfish
Olive Ridley Sea Turtle
Humans Sharks Whales Crocodiles
Olive Ridley’s Food Web
How We Can Help! We can not throw our trash into the
ocean Not go on nesting beaches We can turn off lights on the beach
because baby Olive Ridleys go back to the same beach and if there are lights it confuses them
Dogs dig up sea turtles eggs so keep your dogs off the beach
We Helped! We had a bake sale for the Olive Ridley sea
turtles. We made cupcakes, cookies, and lemonade! We made $42.25, but we were only there for one hour so we feel good about the amount. People were very interested about helping them in fact on girl screamed her car, “Look, they are helping sea turtles, I love turtles, rock on!”
Video of Other People Helping http://www.worldwildlife.org/species/
finder/marineturtles/marineturtles.html
Works- Cited
Caribbean Conservation Corporation. 5/10/2010. http://www.cccturtle.org/seturlteinformationphp?page=olive-ridley.
NOAA Fishers Office Of Protected Resources. 5/11/2010. http://www.hmfs.noaa.gov/pr/species/turtles/oliveridley.htm
The Wild Foundation. 5/11/2010. http://www.wild.org/field-projects/endangered-olive-ridley-turtles/ Orits, Rudy M. et.al. “Predation Upon Olive Ridley Sea Turtles by the American Crocodile at Playa
Nancite, Costa Rica” June 28, 1997: 2-2
Sea World Sea Turtles. 5/12/2010. http://www.seaworld.org/infobooks/seaturltes/stlongevity.html Oxford Journals. 5/13/2010. http://jhered.Oxfordjournals.org/cgi/content/full/9212/2067 Means, Bruce D. “Sea Turtles.” World Book Advanced. World Book,2010.web. 14 May 2010 Olive Ridley Sea Turtle. National geographic. 5/17/2010.
http://animals.nationalgeographic.com/animals/reptiles/olive-ridley-sea-turtle Sea Turtle. Photograph. June 19,2007.
http://farm2.static.flickr.com/1239/553140408_fffa55f330.jpg Olive Ridley Sea Turtle Arribada. Photograph. October 5,2009.
http://www.qondio.com/img/images/files-4/15277.jpg Librahim, Mohamed.We Can Do It. Photograph. http://www.clker.com/clipart-24353.html
Acknowledgements We would like to thank Mr. Pham for
providing the computers and giving constructive criticism when we needed it most.
Also thanks to our moms Carolyn Duryea and Lisa Hinz for supplying the lemonade and baked goods for our stand!