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Endangered Olive Ridley Sea Turtles

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					Endangered Olive Ridley
     Sea Turtles
  By: Sophia Sakopoulos & Isabelle Smith
   Robert Louis Stevenson Middle School
                2nd Period
                4th 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.c
    om/watch?v=UhsxVpZ
    b-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
               Olive Ridley’s Food Web



     Humans     Sharks        Whales         Crocodiles



                  Olive Ridley Sea
                       Turtle



   Mollusks   Crustaceans       Small Fish        Jellyfish


                      Algae
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/finde
    r/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!

				
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