In a fascinating new study forthcoming from The Quarterly Review of Biology, biologists from the University of Oxford explore a rare tactic employed by females badgers to maximize their reproductive success. The authors argue that conception during pregnancy, known as superfetation, benefits female reproductive fitness by reducing the risk of infanticide, extending the females window of opportunity for conception, and increasing the genetic diversity of the litter.
"Natural selection and sexual selection act on both sexes. However, emphasis on sexual selection as a direct evolutionary force acting on males has diverted attention away from the selective process acting on females, whose discrete mating tactics may have masked the extent of reproductive conflict between the sexes," write Nobuyuki Yamaguchi, Hannah L. Dugdale, and David W. Macdonald, all of the Wildlife Conservation Unit at the University of Oxford.
One of only two known species that exhibit or are presumed to exhibit both superfetation and embryonic diapause – during which the newly fertilized egg temporarily ceases development and remains free in the uterus cavity instead of implanting directly into the uterus – the female European badger first ovulates and is fertilized in late winter-early spring (January-March). However, implantation does not occur until December or January of the following year, a gestation period of nearly eleven months.
Suzanne Wu | EurekAlert!
Cancer diagnosis: no more needles?
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The more electronics steer, accelerate and brake cars, the more important it is to protect them against cyber-attacks. That is why 15 partners from industry and academia will work together over the next three years on new approaches to IT security in self-driving cars. The joint project goes by the name Security For Connected, Autonomous Cars (SecForCARs) and has funding of €7.2 million from the German Federal Ministry of Education and Research. Infineon is leading the project.
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A research team led by physicists at the Technical University of Munich (TUM) has developed molecular nanoswitches that can be toggled between two structurally different states using an applied voltage. They can serve as the basis for a pioneering class of devices that could replace silicon-based components with organic molecules.
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At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.
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There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?
At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...
So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics
Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...
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