MORPHOGENESIS OF LONG-LEGGED WOOD FROG (<i>RANA MACROCNEMIS BOULENGER</i>) IN MEDIUM INTENSITY HYPERMAGNETIC FIELD
Features of the amphibians morphogenesis in changed magnetic conditions are little-studied. Morphological studies were carried out at the Department of Zoology and Bioecology of the North Ossetian State University by K.L. Khetagurov. The influence of a medium intensity constant magnetic field (11,5 mT) and the horizontal direction on the morphogenesis of long-legged wood frog tadpoles from the zygote stage to hatching from eggs at the organismal, organ, tissue and cellular levels of organization of living was first studied. During the experiments macromorphological parameters of long-legged wood frog tadpoles exposed at early stages of ontogenesis the influence of medium intensity constant magnetic fields and horizontal direction were studied according to the developed by us model, which showed its high efficiency. Due to exposure of medium intensity hypermagnetic constant field (11,5 mT) the histologic examination showed the liver malformation and the intestine hypoplasia. This is a very serious disruption of normal development, which troubles independent feeding and existence of the tadpole with such defects. Along with the increase in the size and barrel shape, the liver of tadpoles developed under the effect of medium intensity hypermagnetic field is characterized by the fragility of its structure that makes it possible to easily damage the liver in preparation for the histologic examination. The results from the statistical treatment of linear macro parameters of the long-legged wood frog larvae showed that in this case there is a statistically significant increase in the body length. The tadpoles morphogenesis under the medium intensity constant horizontal hypermagnetic field is characterized by 25% of individuals with the combined defects. 18% of the studied tadpoles showed defects in the eye development. 23-37 % of the tadpoles revealed abnormal forebody development.