Green sea turtle chelonia mydas l.jpg
This presentation is the property of its rightful owner.
Sponsored Links
1 / 21

Green Sea Turtle Chelonia mydas PowerPoint PPT Presentation


  • 91 Views
  • Uploaded on
  • Presentation posted in: General

Green Sea Turtle Chelonia mydas. By Jennifer Bengele. Green Sea Turtle Taxonomy. Kingdom Animalia Phylum Chordata Class Reptilia Order Testudines Family Cheloniidae Genus Chelonia species mydas (www.nmfs.noaa.gov/pr/species/turtles/green). Physical Description.

Download Presentation

Green Sea Turtle Chelonia mydas

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Green sea turtle chelonia mydas l.jpg

Green Sea TurtleCheloniamydas

By Jennifer Bengele


Green sea turtle taxonomy l.jpg

Green Sea Turtle Taxonomy

Kingdom Animalia

Phylum Chordata

Class Reptilia

Order Testudines

Family Cheloniidae

Genus Chelonia

species mydas

(www.nmfs.noaa.gov/pr/species/turtles/green)


Physical description l.jpg

Physical Description

Green sea turtles have light colored skin tinted green from a diet comprised entirely of algae and sea grass. They have a shell which varies in color from black to yellow on top called a carapace which is divided into sections called scutes. The hard tissue that forms on the bottom of the shell covering their bellies is called a plastron.

Green sea turtles are sexually dimorphic since the males have longer, thicker tails than the females (www.hsus.org).


Green sea turtle stats l.jpg

Green Sea Turtle Stats

Length: 3 - 4 feet average

Weight: 300-350 pound average

Lifespan: between 40 and 100 years or even more

Reproduction age: 20-30 years

Gestation: 7-10 weeks

Number of offspring: about 100 eggs


Nesting of the green turtle l.jpg

Nesting of the Green Turtle

Female green turtles travel to shore and lay their eggs in the sand on warm beaches. These nesting grounds are called rookeries. The temperature of the sand determines the gender of the hatchlings. Warm temperatures produce females and cooler temperatures result in males. Out of the 100 or so eggs laid, only 1 or 2 of the hatchlings will make it to adulthood (http://library.thinkquest.org).


Biome habitat l.jpg

Biome Habitat

Green Sea Turtles are found in the tropical and temperate regions of ocean throughout the world. Therefore, they play a role in the food web of the marine biome. Females will leave the water to lay their eggs on beaches found in tropical places such as Hawaii and Florida. Males remain in the ocean their entire lives (www.marinebio.com).


Range of green turtle habitat l.jpg

Range of Green Turtle Habitat


The niche of the green sea turtle l.jpg

The Niche of the Green Sea Turtle

Green sea turtles, unlike their relatives, are exclusively herbivorous as adults, favoring sea grass and algae. This is very important to maintaining sea grass beds. As juveniles, green turtles also consume animal material including sponges, jellyfish, snails, worms, and mollusks. Turtle eggs are often preyed upon by raccoons, ants, & crabs. Hatchlings are eaten by sea birds and crabs, and occasionally, an adult turtle will be consumed by a shark. (www.earlham.edu)


Niche con t l.jpg

Niche (Con’t.)

The debris from hatched eggs enriches the sand with much needed nutrients for dune plants which strengthens the beach ecosystem (www.adoptaseaturtle.org).

Green sea turtles are migratory animals, and, as the fastest of the sea turtles, may travel up to 300 miles in just 10 days (http://www.hsus.org). Scientists believe that females use light to find their way to beaches for nesting. In addition, the earth’s magnetic field has been shown to play a role in aiding the turtles in their migration routes to and from their feeding and breeding grounds.


Symbiotic relationships l.jpg

Symbiotic Relationships

  • Mutualism

    • Algae-eating cleaner fish on reefs, such as damselfish and angelfish (www.sailhawaii.com)

  • Parasitism (http://veterinaryrecord.bvapublications.com)

    • Cardiovascular flukes

    • Leeches on skin surface

    • Virus that causes tumors


Example of mutualism l.jpg

Example of Mutualism


Why green turtles are endangered l.jpg

Why Green Turtles are Endangered?

  • A viral infection which causes fibropapilloma tumors

  • Consumption of garbage, especially plastics, dumped in the ocean

  • Harvesting of turtle eggs which are considered a delicacy

  • Accidental entrapment in fishing gear, such as nets

  • Habitat destruction

  • Hunting for turtle meat under plastron

  • Increased human activity at beaches


Value to humans l.jpg

Value to Humans

  • Human consumption of eggs, skin, meat, and calipee which is the cartilage cut from the plastron (www.turtles.org)

  • Shells for decorations such as jewelry

  • Some retailers in the Carribean even sell whole stuffed turtles for profit

  • Breeding grounds (beaches) are desirable to humans


Conservation measures l.jpg

Conservation Measures

  • Education programs

  • Using TED’s in commercial fishing nets

  • Reintroduction programs

  • Legislation

    • CITES

    • US Endangered

      Species Act


A few things we can do l.jpg

A Few Things We Can Do

  • Avoid beach activities during the nesting season

  • Dispose of garbage responsibly

  • Pick up litter from others

  • Report poachers to authorities

  • Do not plant trees, especially non-native species, in beach areas

  • Don’t buy turtle products


Optimum aquarium conditions l.jpg

Optimum Aquarium Conditions

  • A large tank (about 200,000 gallons of salt water)

  • A reef – either real or manmade

  • Appropriate diet based on mostly vegetables such as cabbage, lettuce, brussel sprouts, and squid


Other interesting facts l.jpg

Other Interesting Facts

  • Nearsighted while on land

  • Excellent sense of smell

  • Use the earth’s magnetic field for navigation

  • Unable to pull head into carapace

  • Evolved from land turtles


Slide21 l.jpg

Literature Cited

http://library.thinkquest.org

http://veterinaryrecord.bvapublications.com

www.adoptaseaturtle.org

www.earlham.edu

www.hsus.org

www.marinebio.com

www.nmfs.noaa.gov/pr/species/turtles/green

www.sailhawaii.com

www.turtles.com


  • Login