Effect of changes in the magnetic field on the behavior of common carp

The main topic is the effect of changes in Earth's magnetic field on the behavior of common carp, with a focus on fish farming, as part of associated forest production. The ability of animals to perceive the magnetic field has been demonstrated countless times, but it is still not clear how animals perceive and process information that it provides the geomagnetic field. The theoretical part focuses on magnetorecepcia describes the various mechanisms and discovered knowledge. It also focuses on examples of the use of magnetoreception for the direct benefit of vertebrates. Characteristics of common carp and pond management, and examples of the management of common carp. The practical part is focused on the evaluation of the influence of Earth's magnetic field on common carp. Main attention is given to the positional behavior, as one of the manifestations of magnetoreception. For the evaluation of the data was used statistical software Oriana 4.0., which works on the principle of pie charts. The results support the theory of positional animal behavior and the influence of magnetic field on their behavior. The result is, that carps align their bodies in a north-south axis, but if a situation arises where there is unrest in the Earth's magnetic field, known as a magnetic storm, when is magnetic storm there are changes in the positional behavior. Carp did not show any directional preference. This result proves that carps respond to the changes of Earth's magnetic field