Physiological bases of homing pigeons' orientation. Literature review. Part 2

In the second part of the literarature review the authors summarize the bases of magnetic sensation of the orientation of homing pigeon and the aspects of pigeon-breeding. Understanding the magnetic sensation is in the centre of the researches. The examination of it is a complicated project because the researchers do not know what happens onto the effect of magnetic field. That is why the authors present primary the anatomical, physiological and biochemical bases of the function of this sense. At present the researchers know the magnetoreceptors localized on more points and working with different mechanisms. One of the receptors sense the intensity of the magnetic field and the other receptor defines the direction of the field; and the researchers differentiate the light-dependent sense and the magnetite crystal based sense.