Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:


Conservation assessment of Madagascar's unique reptiles: Highly threatened - not yet over the edge


Reptiles are among Madagascar's most bewildering creatures, but nearly 40% of them are facing an elevated risk of extinction according to a study published today by an international team of researchers with participation of a German team of specialists.

Forest clearance threatens the island's snakes and lizards, whilst illegal collecting for trade and consumption heavily affects tortoises and turtles. Yet, almost of the over 370 known species have been observed recently in the wild, suggesting that few extinctions have occurred yet and that urgent and intensive conservation actions might still be able to save these unique animals. (PLoS One)

One of the rarest tortoises of the world: only a few hundred specimens of the Angonoka (Astrochelys yniphora) persist in the wild in western Madagascar.

Frank Glaw and Miguel Vences

Threatened by deforestation: the Pinocchio Chameleon (Calumma gallus) lives in a small range in the eastern rainforests of Madagascar.

Frank Glaw and Miguel Vences

Madagascar is renowned for its unique animals and plants, most of which occur nowhere else on Earth. Few tourists leave the island without being astonished by a glimpse of its colourful chameleons, giant snakes and otherworldly leaf-tail geckos.

But the island is also a priority country for nature conservation. Most of Madagascar's wildlife, including the well-known lemurs, is affected by habitat destruction and over-collecting.

An assessment of the extinction risk of Madagascar's over 370 species of native reptiles has now been completed by national and international experts for The Red List of Threatened Species of the International Union for Conservation of Nature (IUCN).

Today, in a research paper entitled ‘Extinction Risk and the Conservation of Madagascar’s Reptiles’, the authors analysed patterns in the geographic distribution of the species and the threats facing them.

The data suggest that as many as 39% of Madagascar's reptile species are threatened with extinction. Clearance, or disturbance, of forest habitats for timber removal and expanding agriculture is the major threat to Madagascar’s snakes and lizards, including chameleons and geckos. All Malagasy species of tortoises and freshwater turtles were classed as ‘Critically Endangered’, because of escalating levels of illegal collection for international trade and human consumption.

Such new information on the status of reptiles in Madagascar is crucial to evaluating the exact role of existing protected areas as well as for prioritizing funding and conservation action.

Most importantly, the study also gives some reason for optimism. In fact, no extinctions have so far been documented – with almost all known species having been recorded in recent years in the wild. And most of them occur within the protected area network, although threats are active even in many protected sites, calling for their improved conservation.

Miguel Vences, a Madagascar reptile specialist from the University of Braunschweig in Germany, notes: "Our results highlight the importance of Madagascar’s new protected areas, created since 2003. And, given that almost no extinctions have been recorded yet, we still have the chance to save Madagascar's unique reptiles from extinction. "

Jenkins RKB, Tognelli MF, Bowles P, Cox N, Brown JL, Chan L, Andreone F, Andriamazava A, Andriantsimanarilafy RR, Anjeriniaina M, Bora P, Brady LD, Hantalalaina DF, Glaw F, Griffiths RA, Hilton-Taylor C, Hoffmann M, Katariya V, Rabibisoa NH, Rafanomezantsoa J, Rakotomalala D, Rakotondravony H, Rakotondrazafy NA, Ralambonirainy J, Ramanamanjato JB, Randriamahazo H, Randrianantoandro JC, Randrianasolo HH, Randrianirina JE, Randrianizahana H, Raselimanana AP, Rasolohery A, Ratsoavina FM, Raxworthy CJ, Robsomanitrandrasana E, Rollande F, van Dijk PP, Yoder AD, Vences M (2014): Extinction Risks and the Conservation of Madagascar’s Reptiles. PLoS ONE.

Weitere Informationen: - Quelle

Dr. Elisabeth Hoffmann | idw - Informationsdienst Wissenschaft

Further reports about: Conservation Earth Madagascar PLoS animals colourful chameleons geckos levels lizards reptiles species turtles

More articles from Ecology, The Environment and Conservation:

nachricht Dispersal of Fish Eggs by Water Birds – Just a Myth?
19.02.2018 | Universität Basel

nachricht Removing fossil fuel subsidies will not reduce CO2 emissions as much as hoped
08.02.2018 | International Institute for Applied Systems Analysis (IIASA)

All articles from Ecology, The Environment and Conservation >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Researchers Discover New Anti-Cancer Protein

An international team of researchers has discovered a new anti-cancer protein. The protein, called LHPP, prevents the uncontrolled proliferation of cancer cells in the liver. The researchers led by Prof. Michael N. Hall from the Biozentrum, University of Basel, report in “Nature” that LHPP can also serve as a biomarker for the diagnosis and prognosis of liver cancer.

The incidence of liver cancer, also known as hepatocellular carcinoma, is steadily increasing. In the last twenty years, the number of cases has almost doubled...

Im Focus: Researchers at Fraunhofer monitor re-entry of Chinese space station Tiangong-1

In just a few weeks from now, the Chinese space station Tiangong-1 will re-enter the Earth's atmosphere where it will to a large extent burn up. It is possible that some debris will reach the Earth's surface. Tiangong-1 is orbiting the Earth uncontrolled at a speed of approx. 29,000 km/h.Currently the prognosis relating to the time of impact currently lies within a window of several days. The scientists at Fraunhofer FHR have already been monitoring Tiangong-1 for a number of weeks with their TIRA system, one of the most powerful space observation radars in the world, with a view to supporting the German Space Situational Awareness Center and the ESA with their re-entry forecasts.

Following the loss of radio contact with Tiangong-1 in 2016 and due to the low orbital height, it is now inevitable that the Chinese space station will...

Im Focus: Alliance „OLED Licht Forum“ – Key partner for OLED lighting solutions

Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP, provider of research and development services for OLED lighting solutions, announces the founding of the “OLED Licht Forum” and presents latest OLED design and lighting solutions during light+building, from March 18th – 23rd, 2018 in Frankfurt a.M./Germany, at booth no. F91 in Hall 4.0.

They are united in their passion for OLED (organic light emitting diodes) lighting with all of its unique facets and application possibilities. Thus experts in...

Im Focus: Mars' oceans formed early, possibly aided by massive volcanic eruptions

Oceans formed before Tharsis and evolved together, shaping climate history of Mars

A new scenario seeking to explain how Mars' putative oceans came and went over the last 4 billion years implies that the oceans formed several hundred million...

Im Focus: Tiny implants for cells are functional in vivo

For the first time, an interdisciplinary team from the University of Basel has succeeded in integrating artificial organelles into the cells of live zebrafish embryos. This innovative approach using artificial organelles as cellular implants offers new potential in treating a range of diseases, as the authors report in an article published in Nature Communications.

In the cells of higher organisms, organelles such as the nucleus or mitochondria perform a range of complex functions necessary for life. In the networks of...

All Focus news of the innovation-report >>>



Industry & Economy
Event News

Virtual reality conference comes to Reutlingen

19.03.2018 | Event News

Ultrafast Wireless and Chip Design at the DATE Conference in Dresden

16.03.2018 | Event News

International Tinnitus Conference of the Tinnitus Research Initiative in Regensburg

13.03.2018 | Event News

Latest News

Modular safety concept increases flexibility in plant conversion

22.03.2018 | Trade Fair News

New interactive map shows climate change everywhere in world

22.03.2018 | Earth Sciences

New technologies and computing power to help strengthen population data

22.03.2018 | Earth Sciences

Science & Research
Overview of more VideoLinks >>>