Transcript GREEN SEA TURTLE Marine Biology

GREEN SEA TURTLE
Marine Biology
Presented by Austin and Mike
Kingdom: Animalia
Phylum: Chordata
Class:
Reptilia
Order:
Estudines
Family: Cheloniidae
Genus: Chelonia
Species: Mydas
Chelonia Mydas
Sea Turtle Facts
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Species: there are 7 species: Green Sea Turtle (Chelonia mydas), Hawksbill (Eretmochelys Imbricata),
Leatherback (Dermochelys Coriacea), Loggerhead (Caretta Caretta), Flatbacks (Natator Depressus),
Kemp’s Ridley (Lepidochelys kempii), Olive Ridley (Lepidochelys olivacea).
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Green Sea Turtles from the Cheloniidae family.
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Turtles evolved in the Mesozoic Era and have scarcely changed since. they took to the sea during this
time period.
can live up to 100 years or more.
weight: 300-350 pounds (135-160 kg) for adults; hatchlings weight: 0.05 lbs (25 g)
Weigh up to 400 lbs over all.
Length: 3 feet (1m.) for adults; others maybe up to 5 feet long.
hatchlings are 2 inches (50 mm).
Appearance: top shell (carapace) is smooth with shades of black, gray, green, brown, and yellow; their
bottom shell (plastron) is yellowish white.
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Green Turtle Skeleton
1)
web site.
skeletal information see this
Hawkbills head (beak)
Green Sea Turtles
Hawksbill Sea Turtle
Green sea turtles head (beak)
Kemp’s Ridley
Leatherback
Loggerhead
Olive Ridley
Flatback
FEEDING
They eat: Algae, jellies, squid, urchins, sea cucumbers,
mollusks, prawns, other invertebrates and seaweed.
PREDATION
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Adults: Sharks, whales, and humans.
Juveniles and new hatchlings: Crabs, small marine mammals,
and shorebirds.
HABITAT/LOCATION
-Beaches for nesting
-Open ocean
convergence zones
-Coastal areas for
"benthic" feeding
• Tropical regions along the equator.
• Pacific, Atlantic and Indian Ocean.
• Warmer areas of the oceans.
• Young, sometimes spend their summer in
New England waters.
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REPRODUCTION
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Nesting seasons are at different times around the world. In U.S.-April through October.
They Mate in the ocean, males rarely return to land after crawling into the sea as hatchlings
Most females return to nest on the beach where they were born (natal beach).
Most females nest at least twice during each mating season; some may nest up to ten times in a season.
The female turtle crawls to a dry part of the beach and begins to build a "body pit" by digging with her
flippers and rotating her body. After the body pit is complete, she digs an egg cavity using her cupped rear
flippers as shovels. The egg cavity is shaped roughly like a teardrop and is usually tilted slightly.
These may lay up to 200 eggs.
-Red dots are known major nesting sites
-Yellow dots are minor nesting sites
HUMAN IMPACT/THREATS
-Harvest of eggs and adults (historically,
though the practice continues in some
areas of the world)
-Following artificial lights after hatching
-Incidental capture in fishing gear
-General threats to marine turtles:
Marine debris and environmental
contamination
-Fibropapillomatosis (disease)
The Living Planet Aquarium videos
Part 1:
https://www.dropbox.com/s/0vi7z4hsxxfx1zv/20130925_
143659.mp4
Part 2:
https://www.dropbox.com/s/slzffm0l2qhyplp/20130925_14
3928.mp4
Part 3:
https://www.dropbox.com/s/n24wxvf8vowcg26/20130925_1
51110.mp4
Part 4:
https://www.dropbox.com/s/dgxqw5glqaoveky/20130925_1
51606.mp4
WORK CITED
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http://seapics.com/gallery/Reptilia/Testudines/Cryptodira/Chelonioidea/Cheloniidae/green-seaturtles/green-sea-turtle-search.html
http://www.georgiaseaturtlecenter.org/green-sea-turtles-quick-facts/
www.campus.murraystate.edu/academic/faculty/tderting/anatomyatlas/entireturtskelamy-becky.html
www.fineartamerica.com/featured/honu-green-sea-turtle-maui-hawaii-pierre-leclerc.html
http://www.willgoto.com/1/146579/liens
http://www.neaq.org/animals_and_exhibits/animals/green_sea_turtles/
http://en.wikipedia.org/wiki/Green_Sea_Turtle
http://marinebio.org/species.asp?id=51
http://wildhawaii.org/documents/turtle_id.pdf
http://eol.org/pages/454546/overview