Many people do not just have to hear the squeak of a mouse in the pantry, but scientists have long figured out that this is not the only sounds that can emit home button. During the mating period, these rodents talk to each other in the ultrasonic range, which is not perceived by the human ear. Now, a new study has shown that the sound emitted by mice during mating - is more than just a peep - it’s the song, not very different from those that the birds are singing.
"It appears that the home button may become a new model organism for the study of unusual animal sounds emitted to attract females" - said admiringly in his report Dustin Penn (Dustin Penn), an evolutionary biologist from the Veterinary University of Vienna in Austria. Over the past few years, Penn and his colleagues conducted a series of studies that investigated the sounds made by household mice in order to attract a mate. In its first study, published in the journal Animal Behavior in 2010, they used the field of male mice and female house mice to consider both types of audio techniques specific to attract females.
They found that the majority of males started to issue ultrasonic impulses, the smell of urine female ready for mating and subsequent fertility. When researchers gave the call sign to listen to females, they found that females could somehow make a distinction between urging males who were their "relatives" and others males. In addition, the females did not show much interest in the squeak of their "cousins."
Later, the researchers analyzed some audio parameters of the sounds produced in the pairing field mice, including their length, height and frequency. To their surprise, they found that actually squeak - is a set of sounds that contain a number of features specific to the birdsong, such as changes in the duration and frequency of musical phrases (combinations of sounds separated by silence).
When they compared the songs of birds and rodents, they found that the sounds have both similar and individual traits. They also found that the songs of related males were similar to each other and were markedly different from the songs of males who are not "relatives" of females.
The researchers plan to study in the future as the quality of singing male mice influences the preferences and choices of the females. In birds, for example, often attract the attention of females males who perform complex songs. Future research will also focus on figuring out why the songs of related males are similar.