TaiBIF | Search | All Living Things


Dermochelys coriacea (Vandellius, 1761)
LEATHERY TURTLE
Chelonias lutaria Rafinesque, 1814; Dermatochelys porcata Wagler, 1830; Dermochelis atlantica Cuvier, 1829; Sphargis angusta Philippi, 1899; Sphargis coriacea schlegelii Garman, 1884; Sphargis mercurialis Merrem, 1820; Testudo arcuata Catesby, 1771; Testudo lyra Lacépède, 1788; Testudo tuberculata Pennant, 1801; Testudo coriacea Vandellius, 1761; Leatherback; Leatherback Sea Turtle

Life   Vertebrata   Reptilia   Testudines   Dermochelyidae   Dermochelys

ERROR: can't read /DL/db/CP/NAME_link.db database.

Dermochelys coriacea, laying eggs
Copyright Ginny Bass, 2006 · 3
Dermochelys coriacea, laying eggs

Click on map for details about points.

Links
go to Discover Life's Facebook group

Following modified from Australian Faunal Directory
   Top | See original

http://biodiversity.org.au/afd/taxa/9b31383c-4745-4b8f-a3bd-8b9e91619e47 ---> https://biodiversity.org.au/afd/taxa/9b31383c-4745-4b8f-a3bd-8b9e91619e47
Department of the Environment, Water, Heritage and the Arts

Australian Biological Resources Study

Australian Faunal Directory

You are here:  Environment home » Biodiversity » ABRS » AFD » ANIMALIA (Kingdom) » CHORDATA (Phylum) » VERTEBRATA (Subphylum) » GNATHOSTOMATA (Higher Taxon) » REPTILIA (Class) » TESTUDINES (Order) » DERMOCHELYIDAE (Family) » Dermochelys Blainville, 1816 (Genus) » Dermochelys coriacea (Vandelli, 1761)

Species Dermochelys coriacea (Vandelli, 1761)

Museums

Regional Maps

External Links

CAVS : 2013 Taxon concept Dermochelys_coriacea last modified 2018-03-01 11:36:35.335

Species Dermochelys coriacea (Vandelli, 1761)

Leathery Turtle

 

Taxonomic Decision for Synonymy

 

Generic Combinations

 

Distribution

States

New South Wales, Queensland, South Australia, Tasmania, Western Australia


Extra Distribution Information

Coral Sea, Arafura Sea, Timor Sea, Indian Ocean; also pan-tropical, extending into temperate regions.


IBRA and IMCRA regions (map not available)

IMCRA

Timor Transition (1), Northern Shelf Province (25), Northwest Shelf Transition (26), Northwest Shelf Province (27), Central Western Shelf Transition (28), Central Western Shelf Province (29), Southwest Shelf Transition (30), Southwest Shelf Province (31), Spencer Gulf Shelf Province (33), Western Bass Strait Shelf Transition (34), Bass Strait Shelf Province (35), Tasmanian Shelf Province (36), Southeast Shelf Transition (37), Central Eastern Shelf Province (38), Central Eastern Shelf Transition (39), Northwest Province (4), Northeast Shelf Province (40), Northeast Shelf Transition (41), Central Western Transition (5)

Ecological Descriptors

Aquatic, continental shelf, estuary, inshore, noctidiurnal, oceanic, predator.

Extra Ecological Information

Seasonal breeder, oviparous, feeds principally on coelenterates.

 

General References

Cogger, H.G. & Lindner, D.A. 1969. Marine turtles in northern Australia. The Australian Zoologist 15 : 150-159

Limpus, C.J. & McLachlan, N.C. 1979. Observations on the leatherback turtle, Dermochelys coriacea (L.), in Australia. Australian Wildlife Research 6 : 105-116

Mroxovsky, N. & Pritchard, P.C.H. 1971. Body temperatures of Dermochelys coriacea and other sea turtles. Copeia 1971 : 624-631

Mroxovsky, N. & Shettleworth, S.J. 1975. On the orientation circle of the leatherback turtle, Dermochelys coriacea . Animal Behaviour 23 : 568-591

 

Common Name References

CAVS 2006. Census of Australian Vertebrate Species. Australian Biological Resources Study. (Leathery Turtle)

 

History of changes

Note that this list may be incomplete for dates prior to September 2013.
Published As part of group Action Date Action Type Compiler(s)
08-Mar-2011 01-Mar-2018 MODIFIED
12-Feb-2010 (import)

Accessibility | Disclaimer | Privacy | Freedom of information | © Commonwealth of Australia
Last modified: Thursday, 1 March 2018 11:36:35 AM AEDT

Department of the Environment and Energy
GPO Box 787
Canberra ACT 2601 Australia
+61 (0)2 6274 1111 ABN

Our land. Our plan. Our future.
Australian Government  

Following modified from Animal Diversity Web, University of Michigan
   Top | See original

&pull 20q v5.145 20180528: Error 301 Moved Permanently http://animaldiversity.ummz.umich.edu/site/accounts/information/Dermochelys_coriacea.html

Following modified from turtles.org
   Top | See original

The Leatherback Turtle (Dermochelys coriacea)

Fetches a 60K JPEG

This is a leatherback nesting in Suriname. The picture was provided by the team of Matthew Godfrey of the University of Toronto and Ruth Baretto of York University. We wish to say mahalo nui loa to Ruth and Matthew for permission to use this beautiful photo.

60K JPEG

The following is based on information from the Recovery Plan for U.S. Population of Leatherback Turtles , U.S Fish and Wildlife Service and National Marine Fisheries Service, 1992. Obtained from the U.S. National Marine Fisheries Service, and used with their kind permission.

Current Status

The U.S. Federal government has listed the leatherback as endangered worldwide.

Within the U.S., the leatherback is known to nest in Southeastern Florida, Culebra, Puerto Rico, and St. Croix.

Description

The leatherback is the largest living turtle and is so distinctive that it is placed in its own separate family, Dermochelys.

All other sea turtles have bony hard plates on their shells ( carapace ). The leatherback's carapace is slightly flexible and has a rubbery texture. No sharp angle is formed between the carapace and the under-belly ( plastron ) so a leatherback is somewhat barrel-shaped. Many can grow to be bigger than one too.

The front flippers of a leatherback are longer than in the other marine turtles, even when you take the leatherback's size into account. They can reach 270 cm in adult leatherbacks.

The largest leatherback on record was a male stranded on the West Coast of Wales in 1988. He weighed 916 kg.

Leatherback hatchlings look mostly black when you are glancing down on them, and their flippers are margined in white. Rows of white scales give hatchling leatherbacks the white striping that runs down the length of their backs.

While the Recovery Plan (being a scientific document) makes no mention of this, Turtle Trax would be remiss not to mention it here: hatchling leatherbacks are cute and engaging little animals.

Of considerable interest is that the core body temperature of adults in cold water has been shown to be several degrees Centigrade above the surrounding water. This allows leatherbacks to prosper in ocean regions where other marine reptiles cannot. Fellow Canadian Michael James of Dalhousie University has been training fishermen in eastern Canada to spot leatherbacks, resulting in numerous sightings and an increased awareness that sea turtles inhabit Canadian waters too.

In 1982, Peter Pritchard estimated that 115,000 adult female leatherbacks existed worldwide and that roughly half of them probably were nesting in western Mexico. In recent years, however, the number of nesting leatherbacks has been in an alarming decline.

Threats

Leatherbacks have historically been taken only rarely for their meat. The greatest threat used to be to their eggs, and this threat still exists. There aren't as many eggs to poach these days, however, because fewer and fewer leatherbacks show up to nest. Scientists have concluded that gill-net and longline fisheries are to blame,

Commercial Fisheries

In 1987, it was estimated that offshore shrimp fleets capture about 640 leatherbacks each year. About a quarter (160) die from drowning and many others die when they are injured unintentionally on the decks of these trawlers. A few years ago, US regulations made the use of Turtle Excluder Devices (TEDs) mandatory. While compliance remains a problem, TEDs have saved many leatherbacks.

A group of sea turtle biologists recently concluded (June, 2000) that gill-net and longline fisheries were probably causing the decline. They published their findings in the prestigious journal Nature . They based their findings on the steep decline in the number of nesting turtles. Although some actions have been taken to limit the impact of longline fishing in the Pacific, the future of the leatherback is still seriously in doubt.

Nesting Environment

Leatherbacks prefer open access beaches possibly to avoid damage to their soft plastron and flippers. Unfortunately, such open beaches with little shoreline protection are vulnerable to beach erosion triggered by seasonal changes in wind and wave direction. A presumably secure beach can undergo such severe and dramatic erosion that eggs laid on it are lost.

The theft of eggs for local consumption is not currently a problem in Florida but continues in low levels in the U.S. Virgin Islands. Even though the harvest of turtle eggs is illegal in Puerto Rico, law enforcement efforts have been unsuccessful in deterring it. Historically, the situation was no better on Puerto Rico's smaller islands: e.g. egg poaching has been described as "extensive and unrelenting" (Carr 1978) and a "major problem" (Tucker 1988) on Culebra. Today poaching has been all but eliminated on Culebra as a result of nightly partrol and nest protection programs initiated by FWS on important nesting beaches in 1984.

Leatherbacks are also vulnerable to beach armouring, beach nourishment, artificial lighting, and human encroachment, as described in Threats to Marine Turtles .

Entanglement at Sea

Leatherbacks are the most pelagic of turtles, feeding in the open ocean rather than near shore as other marine turtles do. At sea, they become entangled fairly often in longlines, buoy anchor lines and other ropes and cables. This can result in injury (rope or cable cuts on shoulders and flippers) or drowning.

Ingestion of Marine Debris

Leatherbacks have mistaken plastic bags, raw plastic pellets, plastic and styrofoam, tar balls and balloons for their natural food. Ingesting this debris can obstruct the gut, lead to absorption of toxins and reduce the absorption of nutrients from their real food.

Leatherbacks appear to mistake floating plastic in the form of bags or sheets for jellyfish and then eat it. Ten of 33 dead leatherbacks washed ashore between 1979 and 1988 had ingested plastic bags, plastic sheets or monofilament.

Conservation Accomplishment

The Recovery Plan for the U.S. Population of Leatherback Turtles states:

A substantial effort is being made by government and non-government agencies and private individuals to increase public awareness of sea turtle conservation issues. Federal and State agencies and private conservation organizations such as the Centre for Marine Conservation, Greenpeace and National Audobon Society, have produced and distributed a variety of audio-visual aids and printed material about sea turtles. These include: a booklet on the various types of light fixtures and ways of screening lights to lessen their effects on hatchlings (Raymond 1984), the brochures "Attention Beach Users, "Lights Out" bumper stickers and decals, a coloring book, video tapes, slide/tape programs, full color identification posters of the eight species of sea turtles, and a hawksbill poster. Florida Power and Light Company also has produced a booklet (Van Meter, 1990) with general information on sea turtles. In the USVI, the St. Croix Environmental Association, the University of Virgin Islands Extension Service, the Environmental Association, the University of the Virgin Islands Extension Service, the VIDFW and NPS are actively involved in circulating newsletters and information packages, and in presenting slide shows and seminars. EARTHWATCH-supported projects in Puerto Rico and in the USVI have involved many people in sea turtle conservation efforts. These projects on Sandy Point, NWR, St. Croix, and Culebra, Puerto Rico, have both brought a great deal of attention to this species and have generated high levels of local involvement and awareness. In both locations, the general public has become aware of the problems facing the species and in general has developed protectionist attitudes, in contrast to previous attitudes of exploitation.

Leatherback Quick Facts

Reprinted from Florida's Sea Turtles, Copyright 1992, courtesy the Florida Power & Light Company.

The leatherback is the largest of the sea turtles; it travels the farthest, dives the deepest and ventures into the coldest water.

  • Named for smooth, rubbery shell
  • Feeds on jellyfish
  • About 50 nests a year reported in Florida, estimates of 70,000 to 115,000 breeding females worldwide
  • A huge turtle: adults weigh 700 to 2,000 pounds and measure 4 to 8 feet in length
  • Hatchlings: 2-1/2 inches long
  • Nest in Florida from April through July
  • Many leatherback turtles die from ingesting plastic debris mistaken for jellyfish

About Marine Turtles
Table of Contents
Last modified 04/01/24
Send comments or corrections to webmaster@turtles.org

Following modified from Taiwan Biodiversity National Information Network
   Top | See original

 
Kingdom Animalia  
 Phylum Chordata  
 Class Reptilia  
 Order Testudines  
 Family Dermochelyidae  
 Genus Dermochelys  
  Dermochelys coriacea    Vandelli, 1761 
Provider: Pei-Fen Lee 
hierarchy tree    download xml    download txt    Chinese Page    
Synonyms: Chelonia lutaria Dermatochelys coriacea Dermatochelys porcata Dermochelis atlantica Sphargis angusta Sphargis coriacea Sphargis coriacea schlegelii Sphargis mercurialis Testudo arcuata Testudo coriacea Testudo lyra details
Citation:
Name Code: 380618
      IUCN Red List:VU  A2bd        Taiwan Wildlife Conservation Act- Critically Endangered        Marine     
Suggested Link    Discover Life    World Register of Marine Species (WoRMS)  
User Response:   upload Comments    upload Photo
 
Previous Page       Home Page

Updated: 2020-05-30 23:50:08 gmt
TaiBIF | Search | All Living Things | Top
© Designed by The Polistes Corporation