The impact of hypomagnetic conditions and light deprivation on mitosis of germ cells and body length of prelarvae in roach ( Rutilus rutilus L.)

The impact of light deprivation, geomagnetic deprivation, and the combination of these factors on the mitosis of germ cells in roach embryos and the body length of hatched prelarvae have been studied. It has been shown that geomagnetic deprivation leads to changes in the ratio of blastomeres that pass through initial and final phases of mitosis and the increase in the mitotic index of germ cells. The number of chromosomal abnormalities and body length of prelarvae change as well. An additive effect of the embryos exposure to the combination of light and geomagnetic deprivation is expressed as a significant increase in the number of aberrant mitosis and the body length of prelarvae.