Nonspecific reactions in fish from waters Middle and Lower Volga

The results of years of research (1995-2013) morphological abnormalities found in young fish from reservoirs in the Middle and Lower Volga, and their major tributaries. Analyzed patterns of occurrence of these disorders in young fish of different species and ages. On the example of the Saratov Reservoir described pathology cell erythrocyte series the most abundant species of native and alien species and dynamics of important hematological parameters, as the ratio of mature and immature forms of erythrocytes, the ratio of elytroid cells and lymphoid blood leukocyte fraction of the main forms of white blood cells. Presented research papers pathologies of internal organs and tissues of some common fish species in the Saratov Reservoir. The direct dependence of the observed anomalies of development and abnormalities in fish of different age groups (from the early larval stages to mature individuals) on the level of anthropogenic load on the ecosystem studied reservoir. Proved nonspecific detected as violations of morphological responses to the negative impact of unfavorable environmental conditions.