Tigers, lions and other wild carnivores, already under threat from poaching and habitat loss, are falling victim to a virus that could soon drive endangered populations to extinction.
Canine distemper virus strikes wild carnivores of all stripes, including Amur tigers, – also called Siberian tigers – which roam the Russian Far East in ever-dwindling numbers.
Scientists from the Wildlife Conservation Society, Cornell and the University of Glasgow are urging swift action to address the crisis by developing control measures for the virus, such as delivering a vaccine that is safe for these animals. They also suggest renaming canine distemper virus to reflect the wide range of animals that can carry the virus and suffer from the disease.
“These small endangered populations of carnivores face a lot of threats, but distemper can be the straw that breaks the camel’s back in terms of their survival,” said Colin Parrish, a virologist and director of the Cornell Feline Health Center.
Parrish said Amur tigers are under particular threat because they number in the hundreds and many live in sub-populations of fewer than 25 breeding adults. Between 2007 and 2012, canine distemper contributed to the decline of one well-studied population of Amur tigers from 38 to only 9, a reduction the group may not be able to recover from, Parrish said. Similarly, more than 1,000 lions in the Serengeti National Park disappeared in an outbreak of distemper that began in 1993 – a population decline of about 30 percent.
Studies show that in many cases, wild carnivores are not contracting the distemper virus directly from domestic dogs, but they are getting it from other wild animals that act as intermediaries. This makes controlling the virus exceedingly difficult, Parrish said, and efforts to vaccinate dogs or other wild carnivores may not offer protection for tigers or other large cats.
The situation is urgent, but current distemper vaccines haven’t necessarily been thoroughly tested in the wild species that need protection. While many vaccines appear to be safe, some may not be effective in generating long-lived immune defenses, Parrish said. The group discussed ways to test the safety and efficacy of distemper vaccines in captive animals as well as developing innovative means of immunizing wild animals with oral or aerosol formulations planted in bait or on marking posts.
Renaming the canine distemper virus may be in order, Parrish said, in part because the name is not a good reflection of its host range among carnivores; the virus can affect seals, tigers, bears and more. Also, the word “canine” can lead to management efforts that place too much emphasis on controlling the infection in dogs, when other wild animals carry the virus to infect other species.
“Rather than waiting for the possibility of future outbreaks and more extensive population declines to intervene, addressing the issue before it potentially causes irreversible impacts to tiger populations is likely the most important step,” said Andrew Allison, a postdoctoral fellow at the Baker Institute for Animal Health in Cornell’s College of Veterinary Medicine
Cornell University has television, ISDN and dedicated Skype/Google+ Hangout studios available for media interviews. For additional information, see this Cornell Chronicle story.
Media Relations Specialist
Melissa Osgood | newswise
International network connects experimental research in European waters
21.03.2017 | Leibniz-Institut für Gewässerökologie und Binnenfischerei (IGB)
World Water Day 2017: It doesn’t Always Have to Be Drinking Water – Using Wastewater as a Resource
17.03.2017 | ISOE - Institut für sozial-ökologische Forschung
Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.
The results will be published on March 22 in the journal „Astronomy & Astrophysics“.
Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...
Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.
Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...
In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...
20.03.2017 | Event News
14.03.2017 | Event News
07.03.2017 | Event News
24.03.2017 | Materials Sciences
24.03.2017 | Physics and Astronomy
24.03.2017 | Physics and Astronomy