Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Critically endangered monkey species plummets more than 50 percent since 1994

26.08.2004


Only 300 Delacour’s langurs remain; majority likely to die by 2014



The Delacour’s langur (Trachypithecus delacouri), a charismatic monkey found only in a tiny area of northern Vietnam, is close to extinction, scientists at the International Primatological Society’s 20th Congress reported today. New research suggests that as many as 200 of the remaining 300 individuals, one of the most threatened primates in the world, are likely to disappear within the next decade.

Scientists estimate that between 281 and 317 individuals still exist in 19 distinct populations. Rampant development separates the remaining populations of this langur species, preventing the groups from interacting with one another. Fourteen of the groups are likely to disappear within the next decade, since they either lack a breeding pair or have unsustainably tiny populations. When hunters kill a male critical for reproduction, for example, it spells annihilation for the entire group.


Delacour’s langur is threatened mostly from hunting. Poachers kill the animal not only for meat, but for bones, organs and tissues that are used in the preparation of traditional medicines. Habitat destruction, development and the increase of agricultural lands also threaten the species.

Surprisingly, the monkeys are more likely to be killed within protected areas, since they are more densely forested and poachers are more difficult to spot. Since unprotected areas in northern Vietnam tend to have less wildlife, poachers often avoid them and regard them as less profitable, allowing the few remaining langur populations to survive. Conservation groups are working to increase the level of protection of the protected areas to ensure the survival of the species.

The Delacour’s langur is so rare, that is was first described by science only in 1932. Until the late 1980s, there was virtually no information about the existence and distribution of the species. In the early 1990s, hundreds of the langurs were found on limestone mountain ranges in a small area in northern Vietnam that comprises an area of only 5,000 square kilometers.

The langur is distinguished from other largely black-colored Asian langurs due to its white cheek bands, large white saddle on its outer thighs, and its thickly furred tail.

"At the rate that Delacour’s langur is disappearing, it is unlikely that future generations will ever know this species outside of history books," said Tilo Nadler, Vietnam Country Representative for the Frankfurt Zoological Society. "Still, we have a limited window of opportunity to save them, and we hope the international community will rally around this incredible monkey."

Conservation efforts to protect Delacour’s langur are centered in two national reserves in northern Vietnam. In Van Long National Reserve, created three years ago, approximately 70 individuals remain in three separate populations. Five ranger stations with 20 rangers have been created in an effort to improve management of the area, largely funded by the Frankfurt Zoological Society.

In the other protected area, Pu Luong National Reserve, a larger number of rangers and excellent management are helping to save the two small remaining populations, containing a total of about 50 individuals. Joining the two subpopulations, however, is impossible due to the increasing amount of agricultural space that divides them.

"Delacour’s langur is one of the most Critically Endangered primates in the world, and its status is indicative of what is happening with about 10 percent of the nonhuman primates, our closest living relatives. We don’t have a lot time to reverse this situation, but there is some good news," said Russell A. Mittermeier, president of Conservation International. "Recent new commitments by the Vietnamese government and several international conservation organizations greatly increase the chances of saving this remarkable species."

Brad Phillips | EurekAlert!
Further information:
http://www.conservation.org

More articles from Ecology, The Environment and Conservation:

nachricht International network connects experimental research in European waters
21.03.2017 | Leibniz-Institut für Gewässerökologie und Binnenfischerei (IGB)

nachricht World Water Day 2017: It doesn’t Always Have to Be Drinking Water – Using Wastewater as a Resource
17.03.2017 | ISOE - Institut für sozial-ökologische Forschung

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: Giant Magnetic Fields in the Universe

Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.

The results will be published on March 22 in the journal „Astronomy & Astrophysics“.

Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...

Im Focus: Tracing down linear ubiquitination

Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.

Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...

Im Focus: Perovskite edges can be tuned for optoelectronic performance

Layered 2D material improves efficiency for solar cells and LEDs

In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...

Im Focus: Polymer-coated silicon nanosheets as alternative to graphene: A perfect team for nanoelectronics

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...

Im Focus: Researchers Imitate Molecular Crowding in Cells

Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.

Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

International Land Use Symposium ILUS 2017: Call for Abstracts and Registration open

20.03.2017 | Event News

CONNECT 2017: International congress on connective tissue

14.03.2017 | Event News

ICTM Conference: Turbine Construction between Big Data and Additive Manufacturing

07.03.2017 | Event News

 
Latest News

Pulverizing electronic waste is green, clean -- and cold

22.03.2017 | Materials Sciences

Astronomers hazard a ride in a 'drifting carousel' to understand pulsating stars

22.03.2017 | Physics and Astronomy

New gel-like coating beefs up the performance of lithium-sulfur batteries

22.03.2017 | Materials Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>