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 Safeguarding sustainability through forest certification mapping
27.06.2017 | International Institute for Applied Systems Analysis (IIASA)

nachricht Dune ecosystem modelling
26.06.2017 | Albert-Ludwigs-Universität Freiburg im Breisgau

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: Can we see monkeys from space? Emerging technologies to map biodiversity

An international team of scientists has proposed a new multi-disciplinary approach in which an array of new technologies will allow us to map biodiversity and the risks that wildlife is facing at the scale of whole landscapes. The findings are published in Nature Ecology and Evolution. This international research is led by the Kunming Institute of Zoology from China, University of East Anglia, University of Leicester and the Leibniz Institute for Zoo and Wildlife Research.

Using a combination of satellite and ground data, the team proposes that it is now possible to map biodiversity with an accuracy that has not been previously...

Im Focus: Climate satellite: Tracking methane with robust laser technology

Heatwaves in the Arctic, longer periods of vegetation in Europe, severe floods in West Africa – starting in 2021, scientists want to explore the emissions of the greenhouse gas methane with the German-French satellite MERLIN. This is made possible by a new robust laser system of the Fraunhofer Institute for Laser Technology ILT in Aachen, which achieves unprecedented measurement accuracy.

Methane is primarily the result of the decomposition of organic matter. The gas has a 25 times greater warming potential than carbon dioxide, but is not as...

Im Focus: How protons move through a fuel cell

Hydrogen is regarded as the energy source of the future: It is produced with solar power and can be used to generate heat and electricity in fuel cells. Empa researchers have now succeeded in decoding the movement of hydrogen ions in crystals – a key step towards more efficient energy conversion in the hydrogen industry of tomorrow.

As charge carriers, electrons and ions play the leading role in electrochemical energy storage devices and converters such as batteries and fuel cells. Proton...

Im Focus: A unique data centre for cosmological simulations

Scientists from the Excellence Cluster Universe at the Ludwig-Maximilians-Universität Munich have establised "Cosmowebportal", a unique data centre for cosmological simulations located at the Leibniz Supercomputing Centre (LRZ) of the Bavarian Academy of Sciences. The complete results of a series of large hydrodynamical cosmological simulations are available, with data volumes typically exceeding several hundred terabytes. Scientists worldwide can interactively explore these complex simulations via a web interface and directly access the results.

With current telescopes, scientists can observe our Universe’s galaxies and galaxy clusters and their distribution along an invisible cosmic web. From the...

Im Focus: Scientists develop molecular thermometer for contactless measurement using infrared light

Temperature measurements possible even on the smallest scale / Molecular ruby for use in material sciences, biology, and medicine

Chemists at Johannes Gutenberg University Mainz (JGU) in cooperation with researchers of the German Federal Institute for Materials Research and Testing (BAM)...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Plants are networkers

19.06.2017 | Event News

Digital Survival Training for Executives

13.06.2017 | Event News

Global Learning Council Summit 2017

13.06.2017 | Event News

 
Latest News

Touch Displays WAY-AX and WAY-DX by WayCon

27.06.2017 | Power and Electrical Engineering

Drones that drive

27.06.2017 | Information Technology

Ultra-compact phase modulators based on graphene plasmons

27.06.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>