Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

First discovery of a hibernating primate outside Madagascar

04.12.2015

Up to now, three species of lemurs on Madagascar were the only primates known to hibernate. Researchers at Vetmeduni Vienna in Austria, now show for the first time that another primate species that lives in Vietnam, Cambodia, Laos and China, the pygmy slow loris, also uses hibernation to save energy. The results were published in Scientific Reports this week.

Hibernation is a state of energy conservation during which body temperature and metabolism are drastically reduced. If this state lasts longer than 24 hours, it is called hibernation. Shorter periods are called daily torpor.


Pygmy slow loris are the first known hibernating primates outside Madagaskar.

Photo: Tilo Nadler

There are many mammals that hibernate. However, among primates hibernation is a rare capability, as it had been previously found in three species of lemurs only. Lemurs exclusively live on the island of Madagascar, where they hibernate during the dry season, mainly to conserve water.

Southeast Asian pygmy slow lorises regularly hibernate

Now a team at the Research Institute of Wildlife Ecology at the Vetmeduni Vienna, collaborating with colleagues from the Vietnamese Endangered Primate Rescue Center, has discovered another primate that hibernates: the pygmy slow loris (Nycticebus pygmaeus).

They belong to the so-called wet nosed primates, reach a body size of about 20 centimeter and a body mass of 400 gram. They live in Southeast Asia and are nocturnal, tree-living animals.

The researchers investigated the body temperatures of five pygmy lorises in fall, winter, and spring in a Vietnamese primate reservation. It turned out that both sexes repeatedly showed hibernation episodes lasting up to 63 hours between December and February.

According to first author Thomas Ruf, the underlying reason is likely an endogenous annual clock, which induces hibernation at a time of the year when food abundance is decreasing. However, it is also the decreasing ambient temperature that triggers hibernation.

“In Vietnam, where we studied the animals, there are pronounced seasons. Ambient temperature can drop to 5 centigrade. This is exactly when the probability of animals entering a hibernation episode was highest”, Ruf explains.

According to Ruf, free living pygmy lorises are adapted to reduced food availability in winter. During the cold season food is sparse. Hibernation then helps to save energy. “There had been anecdotal observations of pygmy lorises that remained inactive for several days. Occasionally animals were encountered that felt cool to the touch. However, we discovered only now that the lorises actually hibernate” explains first author Thomas Ruf.

Hibernation as an overwintering strategy among primates

Previously, scientists had assumed that the environmental conditions on Madagascar may have been crucial for the occurrence of hibernation among primates. “Our new finding of a hibernating primate species outside Madagascar sheds new light on the evolution of hibernation”, emphasizes Ruf. “Possibly, hibernation as an overwintering strategy was lost in other primates in Africa, Asia, and the Americas. However, perhaps hibernation is also used by further primate species, which have not been studied yet.”

Service:

The article „Hibernation in the pygmy slow loris (Nycticebus pygmaeus): multiday torpor in primates is not restricted to Madagascar”, by Thomas Ruf, Ulrike Streicher, Gabrielle L. Stalder, Tilo Nadler und Chris Walzer was published in Nature’s Scientific Reports. DOI: 10.1038/SREP17392
http://nature.com/articles/doi:10.1038/srep17392

About the University of Veterinary Medicine, Vienna

The University of Veterinary Medicine, Vienna in Austria is one of the leading academic and research institutions in the field of Veterinary Sciences in Europe. About 1,300 employees and 2,300 students work on the campus in the north of Vienna which also houses five university clinics and various research sites. Outside of Vienna the university operates Teaching and Research Farms. http://www.vetmeduni.ac.at

Scientific Contact:

Ao.Univ.-Prof. Dr. Thomas Ruf

Research Institute of Wildlife Ecology

University of Veterinary Medicine Vienna (Vetmeduni Vienna)

T +43 1 25077-7150

thomas.ruf@vetmeduni.ac.at

Released by:

Susanna Berger

Science Communication / Corporate Communications

University of Veterinary Medicine Vienna (Vetmeduni Vienna)

T +43 1 25077-1153

susanna.berger@vetmeduni.ac.at

Weitere Informationen:

http://www.vetmeduni.ac.at/en/infoservice/presseinformation/press-releases-2015/...

Dr. Susanna Berger | Veterinärmedizinische Universität Wien

More articles from Life Sciences:

nachricht Ion treatments for cardiac arrhythmia — Non-invasive alternative to catheter-based surgery
20.01.2017 | GSI Helmholtzzentrum für Schwerionenforschung GmbH

nachricht Seeking structure with metagenome sequences
20.01.2017 | DOE/Joint Genome Institute

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Traffic jam in empty space

New success for Konstanz physicists in studying the quantum vacuum

An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by...

Im Focus: How gut bacteria can make us ill

HZI researchers decipher infection mechanisms of Yersinia and immune responses of the host

Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...

Im Focus: Interfacial Superconductivity: Magnetic and superconducting order revealed simultaneously

Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.

While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...

Im Focus: Studying fundamental particles in materials

Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales

Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...

Im Focus: Designing Architecture with Solar Building Envelopes

Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.

As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Sustainable Water use in Agriculture in Eastern Europe and Central Asia

19.01.2017 | Event News

12V, 48V, high-voltage – trends in E/E automotive architecture

10.01.2017 | Event News

2nd Conference on Non-Textual Information on 10 and 11 May 2017 in Hannover

09.01.2017 | Event News

 
Latest News

Helmholtz International Fellow Award for Sarah Amalia Teichmann

20.01.2017 | Awards Funding

An innovative high-performance material: biofibers made from green lacewing silk

20.01.2017 | Materials Sciences

Ion treatments for cardiac arrhythmia — Non-invasive alternative to catheter-based surgery

20.01.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>