Male homemade mice produces a number of berries, which are volatile and non-volatile chemical signs that strongly impact on reproductive physiology and female mice behavior. A recent study conducted by researchers from Vetmeduni Vienna now shows that women's mice are attracted to the smell of the foremost men, and that these males produce higher levels of specific buffers compared to undergraduates.
Male house mice identify their territories with urine, which contains a variety of berries. The research team led by Dustin Penn of Vetmeduni Vienna says that malepox is more than double the exception of large urine proteins after they have gained territorial and socially dominant. MUPs bind and stabilize the release of volatile pheromones, and some SMPs exhibit their own pheromonal properties. Penn said, "We also carried out olfactory tests and found that sexually accepted sexually grown female mice were attracted more by the smell of men predominantly than sub-men, but unsatisfactory women show this favorable option. "
The chemical basis of supremacy
The researchers carried out additional analyzes to determine which compounds influenced a female attraction. They found that the most obvious men regulated the ban from specific SMPs, including the pheromone MUP20 (darcin), and a pheromone fluctuating that influenced women's physiology and reproductive behavior. "Our findings show that, once men's voles become dominant and socially dominant, they are the regulation and the amount and types of MAS funds, which increases the density that can be used and their urinary poisoning is attractive to sexually acceptable women, "says Penn.
The current study is the first to show that the territorial male dominates their pheromone production. "This perception is an interesting example of how changes in social behavior can affect genital expression. The current results are of huge interest for behavioral biologists, especially in terms of chimeneanic communication," says Penn.
What are SMPs and what they do
Male house mice, like many animals, produce volatile pheromones that influence reproductive physiology and women's behavior. These pheromones are transported to urine by large urine proteins (AMU) encoded by MUP 21 genes. MUP genes are mainly produced in the liver and are urinated in urine. The researchers were not surprised that male voles produce so much protein in their urine, and much more than women. MUPs carry pheromones not only in the urine, they also stabilize their release from aroma marks. Without this mechanism, the pheromones in smell marks would disappear quickly.
One of the MUP functions is to attract women – especially MUP20, also known as a darge, named after Mr Darcy in a romantic novel Jane Austen Pride and prejudice. With better choice of female mice with dominant social men, the research team assumed that men regulate the amount of SMP they produce in order to advertise their social status and attract women. The current study confirms this assumption. In fact, men do not stop separating MUPs, since the only MUP gene in the human genome is dead, that is, there is a pseudogene inactive.
Why are women attracted to the smell of leading men?
Future studies are now needed to look at the precise methods that manpower regulates these pheromones and how they influence common success. Since the social status of male house voles is influenced by phytotype and genetic quality (e.g., inbreeding), these findings suggest that the SMP exemption can provide a reliable indicator of the quality of the potential friends.
Large urine proteins do not allow recognition of male mice relationships
M. Thoß et al, The regulation of volatile and unstable pheromoneans is dependent on male social status, Scientific Reports (2019). DOI: 10.1038 / s41598-018-36887-y