Some animals, birds and fish are able to migrate thousands of miles, pinpointing if the direction of motion. Researchers have long speculated that the animals can be guided by Earth’s magnetic field. And experts from the Ludwig-Maximilian University have found evidence of this theory: the nose of trout, they found a kind of magnetic navigation - the cells that sense the magnetic field.
In this direction, and previously conducted a lot of research. Thus, it was found that the tissues of migratory fish and migratory birds attaching magnetite. It is assumed that this mineral animals owe their ability to determine the direction of movement. But until now none of the scientists could not find the body cells that perform this function. M. Winklhofer and colleagues chose to study rainbow trout. Some species of these fish out of the river and make sea travel for hundreds of miles. After years of all migrants unmistakable return to their homes, where they were born.
Researchers have come up with a unique way to identify cells with which the trout is guided by the magnetic field. The basis of the work they took the survey conducted 10 years ago, during which the changes have been recorded by the magnetic field of the electrical activity of nerves in the nose fish. German scientists isolated from the nose trout various cells, the samples were placed in petri dishes created around the rotating magnetic field.
Scientists have found that one in ten cell rotates with the same frequency as the magnetic field around the cup. They took these cells and examined them under a microscope. Each of them showed signs of magnetite. This mineral was located near the cell membrane. Scientists estimate that in the nasal area of rainbow trout have 10-100 of these cells.
Michael said that they were surprised by the force of magnetism in cells: it is in the tens or even hundreds of times larger than the researchers expected performance. This may indicate that the fish are capable of not only determine the direction of the north, but also to get through "magnetic navigator" accurate data on longitude and latitude.
Using the method developed by German experts, will soon like cells, scientists will be able to identify the other members of the animal world, and perhaps even in humans.
According to the materials Sciencemagis.ru