Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Dog and jackal hybrids are perfect sniffer ’dogs’

08.05.2002


Nowadays society is deeply concerned with the safety issues, the flight safety in particular. Despite the technological progress, people can not do without dogs` assistance, as no device is capable of replacing the dogs` scent in search of explosive substances and drugs. Dogs are indispensable for differentiating between different individuals by specific smells. To work efficiently a dog needs excellent scent and ability to learn quickly. It is only in Russia that the unique animals -dog and jackal hybrids - have been bred for this purpose. This effort has been undertaken by Klim Sulimov, Senior Research Assistant, D.S. Likhachev Scientific Research Institute for Cultural Heritage and Environmental Protection.




However, why did the scientists come to the idea of breeding the hybrids? The matter is that wild jackals have a better sense of smell than any dog breeds. In the course of domestication animals have lost a lot of qualities needed for living at large. Along with that, it is hard to work with wild animals: they would never trust people completely and be as obedient as dogs. Besides, jackals endure cold weather pretty badly - unlike their congeners, they perspire from all the skin surface. So, hybridisation has appeared to be the only solution.

The scientists had to choose the dog breed best suited for the purpose. "We have chosen arctic dogs - reindeer herding husky, Sulimov told us. Northern dogs have better sense of smell than all other dog breeds, as huskies are used under severe conditions of arctic cold. Substances become non-volatile under low temperatures, that is why a sense of smell becomes keener." The reindeer herding huskies in the North of Russia help to graze reindeers.


By the way, the gun dogs - greyhounds, hounds and setters have got a weakened sense of smell. If a dog`s scent is too keen, the dog is able to smell not only a fresh scent of an animal, but also the scent of the previous day, the two smells confusing the dog. When the dog starts differentiating between multiple smells, it loses time and is unable to promptly perform a specific task of catching the prey. In this situation the dogs with weaker scent gain the advantage being hot on the trail. Hunters normally choose such dogs for breeding, rejecting the dogs with too keen sense of smell. As a rule, this method of selection does not apply to the shepherd dogs, people not trying to affect their sense of smell.

It is not easy to interbreed the jackal and the dog. Only the animals raised by the dog can be forced to such interbreeding. The sexual partner imprinting accompanies such interbreeding. This is particularly important for male jackals, their mating period being very short. The first jackals for unique hybrids were delivered to Moscow in 1975 from the Baku breeding nursery. "Four cubs were tightly packed in a shoe-box, says Sulimov. But they survived the travel all right - the cubs grew up and produced posterity." Their cubs were laid under a bitch of the reindeer herding husky, which raised them. Then the scientists initiated interbreeding.

It was rather easy to cross the male dogs and the female jackals. The reverse crossing turned out more difficult, but nevertheless it succeeded - for the first time in the world. The jackal and dog half-breds had extraordinary scent, but it was very hard to train them. To overcome the difficulty the researchers decided to interbreed them again with the dogs and as a result the quarter-bred hybrids were obtained (the scientists called them `quadroons`). This time the desired result was achieved: the animals had excellent scent and good learning capabilities. The researchers chose not to proceed with the interbreeding, it was necessary to further maintain the gene pool, crossing the `quadroons` with each other. The `quadroons` were employed by the forensic criminology examination department for recognition of a human being`s individual smell. The criteria of efficient smell differentiation were strict: three dogs one by one should have been able to indicate that a certain smell belonged to a certain individual.

Twenty-five jackal and dog hybrids are currently working at the Sheremetevo Airport and ten more - at the expert-criminology center. It has appeared very convenient to use these hybrids at the airport: they are small and can creep through the narrowest spots, when an aircraft is inspected before the departure. They can easily climb up the stairs and walk along narrow cornices. The German shepherd dogs are not fit for this purpose. On top of that, the hybrids help catching the airport thieves who break open the baggage and wipe off their fingerprints (but the smell remains!). "Our dogs are all different and this is an advantage - one key does not fit all locks, says Sulimov. Some tasks require smaller dogs, others - larger and quicker ones. We keep in mind that the hybrid dog can work efficiently for 20-30 minutes, and then it should be replaced by a fresh one. The dog`s tail (which is coiled up - a feature inherited from the husky) indicates that the dog`s vitality is low: if the tail is down - the dog is tired."

The unique hybrids do not make a registered breed yet, they even do not have an approved name, being simply called `Sulimov`s dogs`. It would not make any difference, but the lack of the official registration has prevented the aviation security service from adding the hybrid dogs to the balance sheet since all respective instructions are intended only for the war-dogs of the German shepherd kind. `Sulimov`s dogs` do not have an established value, although they are invaluable for work. There is no chance yet to obtain the official certificate for them. This controversial situation significantly complicates the research work carried out by Sulimov and his colleagues. The dogs are unaware of the fact that they have not been registered - they continue working to protect people`s lives.

Nadejda Markina | alphagalileo

More articles from Interdisciplinary Research:

nachricht Fighting myocardial infarction with nanoparticle tandems
04.12.2017 | Rheinische Friedrich-Wilhelms-Universität Bonn

nachricht Virtual Reality for Bacteria
01.12.2017 | Institute of Science and Technology Austria

All articles from Interdisciplinary Research >>>

The most recent press releases about innovation >>>

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

Im Focus: First-of-its-kind chemical oscillator offers new level of molecular control

DNA molecules that follow specific instructions could offer more precise molecular control of synthetic chemical systems, a discovery that opens the door for engineers to create molecular machines with new and complex behaviors.

Researchers have created chemical amplifiers and a chemical oscillator using a systematic method that has the potential to embed sophisticated circuit...

Im Focus: Long-lived storage of a photonic qubit for worldwide teleportation

MPQ scientists achieve long storage times for photonic quantum bits which break the lower bound for direct teleportation in a global quantum network.

Concerning the development of quantum memories for the realization of global quantum networks, scientists of the Quantum Dynamics Division led by Professor...

Im Focus: Electromagnetic water cloak eliminates drag and wake

Detailed calculations show water cloaks are feasible with today's technology

Researchers have developed a water cloaking concept based on electromagnetic forces that could eliminate an object's wake, greatly reducing its drag while...

Im Focus: Scientists channel graphene to understand filtration and ion transport into cells

Tiny pores at a cell's entryway act as miniature bouncers, letting in some electrically charged atoms--ions--but blocking others. Operating as exquisitely sensitive filters, these "ion channels" play a critical role in biological functions such as muscle contraction and the firing of brain cells.

To rapidly transport the right ions through the cell membrane, the tiny channels rely on a complex interplay between the ions and surrounding molecules,...

Im Focus: Towards data storage at the single molecule level

The miniaturization of the current technology of storage media is hindered by fundamental limits of quantum mechanics. A new approach consists in using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. A research team from Kiel University has now managed to successfully place a new class of spin-crossover molecules onto a surface and to improve the molecule’s storage capacity. The storage density of conventional hard drives could therefore theoretically be increased by more than one hundred fold. The study has been published in the scientific journal Nano Letters.

Over the past few years, the building blocks of storage media have gotten ever smaller. But further miniaturization of the current technology is hindered by...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

See, understand and experience the work of the future

11.12.2017 | Event News

Innovative strategies to tackle parasitic worms

08.12.2017 | Event News

AKL’18: The opportunities and challenges of digitalization in the laser industry

07.12.2017 | Event News

 
Latest News

Engineers program tiny robots to move, think like insects

15.12.2017 | Power and Electrical Engineering

One in 5 materials chemistry papers may be wrong, study suggests

15.12.2017 | Materials Sciences

New antbird species discovered in Peru by LSU ornithologists

15.12.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>