Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:


Flying bears – Molecular genetics provides evidence for an unusual dispersal mode

A genetic study of brown bears in Bulgarian mountain regions provided evidence for the existence of individuals of Carpathian origin. How did they get there? Natural dispersal is unlikely. Rather, the bears were brought in by air transport. Along with cooperation partners of Bulgarian and Romanian NGOs and the Frankfurt Zoological Society Scientists of the Senckenberg Conservation Genetics Section in Frankfurt, Germany have confirmed the legend that the former leader of the Romanian Communist Party, Nicolae Ceausescu once sent the bears to Bulgaria. The study has now been published in the journal Conservation Genetics.

The brown bear (Ursus arctos) is considered an endangered species across Europe. While the species is largely extinct in the western part of the continent, larger populations have persisted in the eastern part, including Russia, the Carpathians and the Balkan Peninsula.

Brown bear in Kormisosh enclosure

© Aleksandar Dutsov, Balkani Wildlife Society

Brown bear in Kormisosh enclosure

© Aleksandar Dutsov, Balkani Wildlife Society

“Unfortunately, we lack considerable knowledge about these few remaining viable bear populations, including basic data such as population size and connectivity“, says Dr. Carsten Nowak, wildlife geneticist at Senckenberg. In order to change this unsatisfying situation, leading bear experts from the Balkani Research Society sampled more than 200 scat, hair and tissue samples of the species across Bulgarian bear habitats. Individual DNA profiles generated at the DNA laboratories of Senckenberg and the LOEWE Biodiversity and Climate Research Centre in Frankfurt (BiK-F) finally provided hard data on the population status in the country. During the analysis, however, PhD student Christiane Frosch revealed an unusual pattern: several individual profiles collected in three regions in the main mountain regions of the country, the Stara Planina Mountains and the Rhodopes, differed considerably from all the other bear profiles. Where did these bears come from and how did they get there?

The scientists finally found the place of origin of these „scientific problem bears“: Samples from the Carpathian mountains in Romania provided from bear conservationists of the local Milvus Group perfectly matched the unusual Bulgarian DNA profiles.These regions, however, lie several hundred kilometers apart from each other and the generally high genetic difference between the populations does not suggest high rates of exchange.

Although bears are good long-distance dispersers and could theoretically make it from Romania to Bulgaria by themselves, the scientists were skeptic. „We cannot exclude the possibility of natural migration, but geographic locations of the revealed samples and several other patterns make this scenario unlikely“, says Nowak.

Bear Hunting – a Dictator’s Hobby?

Intensive investigation and regional study finally brought a more reasonable explanation: during the era of socialism some Eastern European heads of government were passionate bear hunters. It is reported that the Romanian dictator, Nicolae Ceausescu (1918-1989), shot more than 1000 bears in his lifetime. The constant success of his bear hunting activities was guaranteed by numerous assistant hunters and game wardens, and by activities that targeted the boosting of the Romanian bear population, including raising bears in captivity.

Some of these bears were used for improving relationships with allied rulers. In Romania and Bulgaria people report that the large Carpathian bears were brought to Bulgarian enclosures be military planes and released in order to spice up the less impressive local bear population. Indeed, at least one of the places where translocated bears where kept, the Kormisosh enclosure in the Rhodopes, does still exist (see photo), as local investigations revealed. Indeed, several of the “alien” bear genotypes were found in the vicinity of this enclosure. 

More than two decades after the breakdown of socialism in Eastern Europe researchers from Germany, Bulgaria and Romania confirm a curious legend: aerial dispersal is not restricted to plants, insects, spiders, or birds. Occasionally, this might also involve bears, the heaviest land predators on earth. 

It should be noted that despite of intensive investigation, the researchers found no written documents about the case. Their study, now online in the journal “Conservation Genetics” is the first written document to certify it.


Nowak, C.; Domokos, C.; Dustov, A.; Frosch, C.: Molecular evidence for historic long-distance translocations of brown bears in the Balkan region; 2014, Conservation Genetics.


Dr. Carsten Nowak
Conservation Genetics Section
Senckenberg Field station Gelnhausen
Tel +49 (0) 6051-61954-3122

Press Office

Senckenberg Gesellschaft für Naturforschung
Regina Bartel
Tel. +49 (0) 69- 7542 1434

Weitere Informationen:

Dr. Sören Dürr | Senckenberg

More articles from Life Sciences:

nachricht First time-lapse footage of cell activity during limb regeneration
25.10.2016 | eLife

nachricht Phenotype at the push of a button
25.10.2016 | Institut für Pflanzenbiochemie

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Etching Microstructures with Lasers

Ultrafast lasers have introduced new possibilities in engraving ultrafine structures, and scientists are now also investigating how to use them to etch microstructures into thin glass. There are possible applications in analytics (lab on a chip) and especially in electronics and the consumer sector, where great interest has been shown.

This new method was born of a surprising phenomenon: irradiating glass in a particular way with an ultrafast laser has the effect of making the glass up to a...

Im Focus: Light-driven atomic rotations excite magnetic waves

Terahertz excitation of selected crystal vibrations leads to an effective magnetic field that drives coherent spin motion

Controlling functional properties by light is one of the grand goals in modern condensed matter physics and materials science. A new study now demonstrates how...

Im Focus: New 3-D wiring technique brings scalable quantum computers closer to reality

Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.

"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...

Im Focus: Scientists develop a semiconductor nanocomposite material that moves in response to light

In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.

A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...

Im Focus: Diamonds aren't forever: Sandia, Harvard team create first quantum computer bridge

By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.

"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...

All Focus news of the innovation-report >>>



Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

Agricultural Trade Developments and Potentials in Central Asia and the South Caucasus

14.10.2016 | Event News

World Health Summit – Day Three: A Call to Action

12.10.2016 | Event News

Latest News

Greater Range and Longer Lifetime

26.10.2016 | Power and Electrical Engineering

VDI presents International Bionic Award of the Schauenburg Foundation

26.10.2016 | Awards Funding

3-D-printed magnets

26.10.2016 | Power and Electrical Engineering

More VideoLinks >>>