Features leukocyte formula in roach (Rutilus rutilus Linnaeus, 1758) from the reservoir different type (for example saratov reservoir and small rivers Republic of Udmurtia)

In 2011, investigated the leukocyte counts in roach Saratov reservoir and two small rivers in the republic of Udmurtia. These reservoirs are characterized by different hydrological regime and the degree of anthropogenic impact. For the first time made a comparative analysis of the occurrence of individuals with different levels of leukocytes in the blood stream, significant differences are set for this indicator in water with different levels of pollution. The calculation of the index shift of leukocytes (ISL), found that its value in all individuals of roach Saratov reservoir does not meet the conventional standard, which is a sign of increased anthropogenic stress.