West Nile virus has become a widespread human health concern, yet little attention is given to the grave situation facing certain wildlife species dying from the deadly disease, says a University of Alberta scientist. Cameron Aldridge is part of a research team to have shown that the West Nile Virus represents a significant new stressor on the sage-grouse—a species already on the endangered list in Canada and under current consideration for federal listing in the United States. "We dont yet know whether the sage-grouse are more at risk than other species but we do know that the West Nile virus could have devastating consequences for small populations," said Aldridge, a co-author on a research paper just published in "Ecology Letters."
Aldridge was part of a team that monitored radio-marked female sage-grouse from March 2003 to September 2004 in five sites in Alberta, Montana and Wyoming. They found that populations that had their first exposure to the virus in 2003, had a 25% decrease in late summer survival of females. West Nile virus was confirmed to have killed 18 individuals whose carcases could be relocated. Serum from 112 sage-grouse collected after the outbreak show that none had antibodies, suggesting that they lack resistance.
"When we tested individual sage grouse after the outbreak of the virus in 2003, we hoped we would find antibodies present for the virus, indicating some birds were infected, fought off the virus and survived, but we didnt see that," said Aldridge, a PhD candidate in the Faculty of Science. "The immunity appears to be extremely low for sage-grouse, which means it is going to take much longer for the population to develop resistance to the virus and to survive, if they are indeed capable. We dont know how long small populations like those found in Alberta or Saskatchewan can survive, while losing the genetic basis needed to maintain the population, but we may not have much time."
Phoebe Dey | EurekAlert!
Shaping the rings of molecules
24.02.2020 | University of Montreal
NUI Galway highlights reproductive flexibility in hydractinia, a Galway bay jellyfish
24.02.2020 | National University of Ireland Galway
The operational speed of semiconductors in various electronic and optoelectronic devices is limited to several gigahertz (a billion oscillations per second). This constrains the upper limit of the operational speed of computing. Now researchers from the Max Planck Institute for the Structure and Dynamics of Matter in Hamburg, Germany, and the Indian Institute of Technology in Bombay have explained how these processes can be sped up through the use of light waves and defected solid materials.
Light waves perform several hundred trillion oscillations per second. Hence, it is natural to envision employing light oscillations to drive the electronic...
Most natural and artificial surfaces are rough: metals and even glasses that appear smooth to the naked eye can look like jagged mountain ranges under the microscope. There is currently no uniform theory about the origin of this roughness despite it being observed on all scales, from the atomic to the tectonic. Scientists suspect that the rough surface is formed by irreversible plastic deformation that occurs in many processes of mechanical machining of components such as milling.
Prof. Dr. Lars Pastewka from the Simulation group at the Department of Microsystems Engineering at the University of Freiburg and his team have simulated such...
Investigation of the temperature dependence of the skyrmion Hall effect reveals further insights into possible new data storage devices
The joint research project of Johannes Gutenberg University Mainz (JGU) and the Massachusetts Institute of Technology (MIT) that had previously demonstrated...
Researchers at Chalmers University of Technology, Sweden, recently completed a 5-year research project looking at how to make fibre optic communications systems more energy efficient. Among their proposals are smart, error-correcting data chip circuits, which they refined to be 10 times less energy consumptive. The project has yielded several scientific articles, in publications including Nature Communications.
Streaming films and music, scrolling through social media, and using cloud-based storage services are everyday activities now.
After helping develop a new approach for organic synthesis -- carbon-hydrogen functionalization -- scientists at Emory University are now showing how this approach may apply to drug discovery. Nature Catalysis published their most recent work -- a streamlined process for making a three-dimensional scaffold of keen interest to the pharmaceutical industry.
"Our tools open up whole new chemical space for potential drug targets," says Huw Davies, Emory professor of organic chemistry and senior author of the paper.
12.02.2020 | Event News
16.01.2020 | Event News
15.01.2020 | Event News
24.02.2020 | Agricultural and Forestry Science
24.02.2020 | Earth Sciences
24.02.2020 | Agricultural and Forestry Science