A specialist of the State Nature Conservation Area “Wrangel Island”, N.G. Ovsyanikov, has been observing polar bears closely for many years, when the bears arrived at the island coast in autumn, once pack-ice recedes. In the researcher’s opinion, perception of a polar bear as a solitary predator, which is not practically tied with its congeners, is not true. Polar bears do not lose sight of each other and build up rather complicated social relations.
When pack-ice starts thawing, bears come down to the coast at the point which is the closest to the block of ice they left, and they slowly go towards one of the traditional walrus-rookeries –Somnitelnaya (Doubtful) spit or spit of cape of Blossom. There are always old walrus skins and bones in that area and sometimes even live walruses. A community of polar bears of different sexes and ages assembles in autumn in those areas or near new significant sources of feed. If feed is in abundance, up to 160 animals may gather in a small lot. Naturally, they permanently meet with each other and are forced to regulate their relations somehow.
Some behavior inertness is typical of polar bears – they may not notice someone or something if they are focused on something else. However, a polar bear would never miss congeners within the field of thier vision or any social events. To be well informed, bears are constantly smelling and “licking” air, thus getting a lot of information. Along with that, every animal continuously watches other bears of the corner of its eye. At the distance of 600 to 700 meters, bears are able not only to see other animal, but also to evaluate its social status and even to recognize a familiar animal, as bears remember familiar animals for years.
Sergey Komarov | alfa
Microtechnology industry is hiring – positive developments of past years continue
09.04.2018 | IVAM Fachverband für Mikrotechnik
RWI/ISL-Container Throughput Index with minor decline on a high overall level
20.03.2018 | RWI – Leibniz-Institut für Wirtschaftsforschung
For the first time ever, scientists have determined the cosmic origin of highest-energy neutrinos. A research group led by IceCube scientist Elisa Resconi, spokesperson of the Collaborative Research Center SFB1258 at the Technical University of Munich (TUM), provides an important piece of evidence that the particles detected by the IceCube neutrino telescope at the South Pole originate from a galaxy four billion light-years away from Earth.
To rule out other origins with certainty, the team led by neutrino physicist Elisa Resconi from the Technical University of Munich and multi-wavelength...
For the first time a team of researchers have discovered two different phases of magnetic skyrmions in a single material. Physicists of the Technical Universities of Munich and Dresden and the University of Cologne can now better study and understand the properties of these magnetic structures, which are important for both basic research and applications.
Whirlpools are an everyday experience in a bath tub: When the water is drained a circular vortex is formed. Typically, such whirls are rather stable. Similar...
Physicists working with Roland Wester at the University of Innsbruck have investigated if and how chemical reactions can be influenced by targeted vibrational excitation of the reactants. They were able to demonstrate that excitation with a laser beam does not affect the efficiency of a chemical exchange reaction and that the excited molecular group acts only as a spectator in the reaction.
A frequently used reaction in organic chemistry is nucleophilic substitution. It plays, for example, an important role in in the synthesis of new chemical...
Optical spectroscopy allows investigating the energy structure and dynamic properties of complex quantum systems. Researchers from the University of Würzburg present two new approaches of coherent two-dimensional spectroscopy.
"Put an excitation into the system and observe how it evolves." According to physicist Professor Tobias Brixner, this is the credo of optical spectroscopy....
Ultra-short, high-intensity X-ray flashes open the door to the foundations of chemical reactions. Free-electron lasers generate these kinds of pulses, but there is a catch: the pulses vary in duration and energy. An international research team has now presented a solution: Using a ring of 16 detectors and a circularly polarized laser beam, they can determine both factors with attosecond accuracy.
Free-electron lasers (FELs) generate extremely short and intense X-ray flashes. Researchers can use these flashes to resolve structures with diameters on the...
13.07.2018 | Event News
12.07.2018 | Event News
03.07.2018 | Event News
18.07.2018 | Materials Sciences
18.07.2018 | Life Sciences
18.07.2018 | Health and Medicine