Dermochelys coriacea

Dans la majeure partie du monde, et en particulier dans les régions tropicales et subtropicales, les animaux sauvages aquatiques sont capturés ou attrapés de façon opportuniste, et leur viande, les parties de leurs corps et/ou leurs œufs sont consommés à des fins de subsistance locale ou utilisés à des fins traditionnelles.

22 Mar 2022

À quelques jours de la Journée mondiale de la tortue marine, le Mémorandum d’entente sur la conservation et la gestion des tortues marines et de leurs habitats de l’océan Indien et de l’Asie du Sud-Est (MdE Tortues marines de l’IOSEA) fêtait son vingtième anniversaire.

25 Jun 2021

La 2ème réunion du Groupe de travail sur les tortues marines du nord de l’océan Indien, mis en place par le MdE de la CMS sur les tortues marines de la région IOSEA, s’est tenue les 29 et 30 janvier et était organisée par le Ministère de la conservation des espèces sauvages du Sri Lanka, à Colombo. Ouverte par le Secrétaire Douglas Nanayakkara, du Ministère du Développement durable et des espèces sauvages, le principal objectif de la réunion était de trouver un accord sur des actions régionales concertées afin de conserver les tortues marines.

30 Jan 2018
Description: 

The leatherback (Dermochelys coriacea) is the largest turtle and the largest living reptile in the world. Mature males and females can grow to 2 m in total length and weigh almost 900 kg, although individuals of this large size seem to be rare today. Females lay clutches of approximately 100 eggs, including many abnormally small, "yolkless" eggs.  Like all other marine turtles they use sandy, beaches, but unlike other marine turtles, leatherbacks can nest on both tropical and subtropical beaches. They nest several times during a nesting season; there are records of some individuals nesting as many as 7, 8, or 9 times in a single season.

The leatherback is the only sea turtle that lacks a hard shell: there are no large external keratinous scutes and the underlying bony shell is composed of a mosaic of hundreds of tiny bones. Adults are capable of tolerating water temperatures well below tropical and subtropical conditions, and special physiological adaptations allow them to maintain body temperature above cool water temperatures.  In subtemperate areas they can maintain internal body temperature up to 17 degrees above ambient water temperature. 

The leatherback's beak is unique in having a conspicuous cusp on either side of the upper jaw.  They specialise on soft bodied invertebrates found in the water column, particularly jelly fish and other sorts of “jellies.”   

The leatherback is the most wide ranging marine turtle species.  Animals regularly migrate enormous distances, crossing ocean basins, or even moving between ocean basins, such as between the Indian and south Atlantic Oceans. They are commonly found in pelagic areas, but they also forage in coastal waters in certain areas.  The distribution and developmental habitats of juvenile leatherbacks are poorly understood. While the leatherback is not as common in the Indian Ocean as other species, important nesting populations are found in and around the Indian Ocean, including in Indonesia, South Africa, Sri Lanka and India’s Andaman and Nicobar Islands.  The leatherback's markedly oceanic habits make it especially subject to interactions with modern high seas fisheries, particularly longlines.

For more information on the conservation status of leatherback turtles in and around the Indian Ocean, please consult the IOSEA Leatherback Species Assessment.

The preceding biological information on marine turtle species found around the Indian Ocean is derived partly from the NOAA Fisheries, Office of Protected Resources, website:(http://www.nmfs.noaa.gov/pr/species/turtles/), supplemented by other sources (such as a website of the Australian Government, Department of Environment, Water, Heritage and the Arts -- for information on the Flatback turtle), and additional information supplied by Dr. Jack Frazier (IOSEA Advisory Committee Chair). 

 

Information d'évaluation
Instruments de la CMSCMS, IOSEA Marine Turtles, Atlantic Turtles
IUCN StatusVulnerable
Date of entry in Appendix I1979
Date d'inscription à l'Annexe II1979
Répartition géographique
Pays Albania, Algeria, Angola, Antigua and Barbuda, Argentina, Australia, Bahamas, Bahrain, Bangladesh, Barbados, Belize, Benin, Bosnia and Herzegovina, Brazil, Brunei Darussalam, Cambodia, Cameroon, Canada, Chile, China, Colombia, Comoros, Congo (Brazzaville), Costa Rica, Croatia, Cuba, Cyprus, Côte d'Ivoire, Democratic People's Republic of Korea, Democratic Republic of the Congo (Kinshasa), Djibouti, Dominica, Dominican Republic, Ecuador, Egypt, El Salvador, Equatorial Guinea, Eritrea, Fiji, France, Gabon, Gambia, Ghana, Greece, Grenada, Guatemala, Guinea, Guinea-Bissau, Guyana, Haiti, Honduras, Iceland, India, Indonesia, Iran, Iraq, Ireland, Israel, Italy, Jamaica, Japan, Kenya, Kiribati, Kuwait, Lebanon, Liberia, Libya, Madagascar, Malaysia, Maldives, Malta, Marshall Islands, Mauritania, Mauritius, Mexico, Micronesia, Monaco, Montenegro, Morocco, Mozambique, Myanmar, Namibia, Nauru, Netherlands, New Zealand, Nicaragua, Nigeria, Norway, Oman, Pakistan, Palau, Panama, Papua New Guinea, Peru, Philippines, Portugal, Qatar, Republic of Korea, Russian Federation, Saint Kitts and Nevis, Saint Lucia, Saint Vincent and the Grenadines, Samoa, Saudi Arabia, Senegal, Serbia, Seychelles, Sierra Leone, Slovenia, Solomon Islands, Somalia, South Africa, Spain, Sri Lanka, Sudan, Suriname, Syrian Arab Republic, São Tomé and Príncipe, Thailand, Togo, Tonga, Trinidad and Tobago, Tunisia, Tuvalu, Türkiye, United Arab Emirates, United Kingdom, United Republic of Tanzania, United States of America, Uruguay, Vanuatu, Venezuela, Viet Nam, Yemen
Noms communs
AnglaisLeatherback Turtle, Leathery Turtle
FrançaisTortue Luth
EspagnolTortuga laúd
AllemandLederschildkröte
Taxonomie
ClasseReptilia
OrdreTestudinata
FamilleDermochelidae
Nom scientifique Dermochelys coriacea
Author(Vandelli, 1761)
Standard referenceEckert, K.L., Bjorndal, K.A., Abreu-Grobois, F.A. and Donnelly, M. (Eds) (1999). Research and management techniques for the conservation of sea turtles. IUCN/SSC Marine Turtle Specialist Group Publication No.4.

Other details
Additional notesIn Effect 7/1/1999

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