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 Cancer diagnosis: no more needles?
25.05.2018 | Christian-Albrechts-Universität zu Kiel

nachricht Less is more? Gene switch for healthy aging found
25.05.2018 | Leibniz-Institut für Alternsforschung - Fritz-Lipmann-Institut e.V. (FLI)

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Powerful IT security for the car of the future – research alliance develops new approaches

The more electronics steer, accelerate and brake cars, the more important it is to protect them against cyber-attacks. That is why 15 partners from industry and academia will work together over the next three years on new approaches to IT security in self-driving cars. The joint project goes by the name Security For Connected, Autonomous Cars (SecForCARs) and has funding of €7.2 million from the German Federal Ministry of Education and Research. Infineon is leading the project.

Vehicles already offer diverse communication interfaces and more and more automated functions, such as distance and lane-keeping assist systems. At the same...

Im Focus: Molecular switch will facilitate the development of pioneering electro-optical devices

A research team led by physicists at the Technical University of Munich (TUM) has developed molecular nanoswitches that can be toggled between two structurally different states using an applied voltage. They can serve as the basis for a pioneering class of devices that could replace silicon-based components with organic molecules.

The development of new electronic technologies drives the incessant reduction of functional component sizes. In the context of an international collaborative...

Im Focus: LZH showcases laser material processing of tomorrow at the LASYS 2018

At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.

At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...

Im Focus: Self-illuminating pixels for a new display generation

There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?

At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...

Im Focus: Explanation for puzzling quantum oscillations has been found

So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics

Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

In focus: Climate adapted plants

25.05.2018 | Event News

Save the date: Forum European Neuroscience – 07-11 July 2018 in Berlin, Germany

02.05.2018 | Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

 
Latest News

In focus: Climate adapted plants

25.05.2018 | Event News

Flow probes from the 3D printer

25.05.2018 | Machine Engineering

Less is more? Gene switch for healthy aging found

25.05.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>