From polyandry to multiple paternity and plural breeding, Canadian researchers have gathered DNA evidence from adult foxes and their offspring that proves that some arctic foxes are mixing it up when it comes to mating.
Until recently, wildlife biologists considered many species of canines—including foxes, wolves and coyotes—to be monogamous. But molecular genetic techniques are starting to reveal complexities in mammalian mating systems that were not apparent from observational studies of animal social behavior. Using a technique called microsatellite DNA fingerprinting, a team of researchers from the University of Alberta in Edmonton and the University of Quebec at Rimouski collected DNA samples from 49 arctic foxes trapped in dens on Bylot Island, Nunavut.
In three-quarters of the dens, DNA fingerprints showed that the fox cubs were the offspring of a single male and female. But in a quarter of the cases, the arctic foxes proved to be less exclusive, with one litter providing the first genetic evidence of polyandry (females having multiple male mates at one time) with multiple paternity.
Lindsey Carmichael—lead author of the study and a recent graduate from the U of A—says there are various explanations for polyandry and the multiple paternity associated with it.
“Multiple paternity allows a female to increase the genetic variation contained in a single season’s reproductive output,” says Carmichael. “This increase in variation might improve the odds that at least one cub in a litter will be optimally adapted to its current environment or better equipped to deal with changes in its environment over time.”
Isabela C. Varela | EurekAlert!
New study from the University of Halle: How climate change alters plant growth
12.01.2018 | Martin-Luther-Universität Halle-Wittenberg
Disarray in the brain
18.12.2017 | Universität zu Lübeck
On the way to an intelligent laboratory, physicists from Innsbruck and Vienna present an artificial agent that autonomously designs quantum experiments. In initial experiments, the system has independently (re)discovered experimental techniques that are nowadays standard in modern quantum optical laboratories. This shows how machines could play a more creative role in research in the future.
We carry smartphones in our pockets, the streets are dotted with semi-autonomous cars, but in the research laboratory experiments are still being designed by...
What enables electrons to be transferred swiftly, for example during photosynthesis? An interdisciplinary team of researchers has worked out the details of how...
For the first time, scientists have precisely measured the effective electrical charge of a single molecule in solution. This fundamental insight of an SNSF Professor could also pave the way for future medical diagnostics.
Electrical charge is one of the key properties that allows molecules to interact. Life itself depends on this phenomenon: many biological processes involve...
At the JEC World Composite Show in Paris in March 2018, the Fraunhofer Institute for Laser Technology ILT will be focusing on the latest trends and innovations in laser machining of composites. Among other things, researchers at the booth shared with the Aachen Center for Integrative Lightweight Production (AZL) will demonstrate how lasers can be used for joining, structuring, cutting and drilling composite materials.
No other industry has attracted as much public attention to composite materials as the automotive industry, which along with the aerospace industry is a driver...
Scientists at Tokyo Institute of Technology (Tokyo Tech) and Tohoku University have developed high-quality GFO epitaxial films and systematically investigated their ferroelectric and ferromagnetic properties. They also demonstrated the room-temperature magnetocapacitance effects of these GFO thin films.
Multiferroic materials show magnetically driven ferroelectricity. They are attracting increasing attention because of their fascinating properties such as...
08.01.2018 | Event News
11.12.2017 | Event News
08.12.2017 | Event News
22.01.2018 | Materials Sciences
22.01.2018 | Earth Sciences
22.01.2018 | Life Sciences