Open AccessFORMATION OF SECONDARY IMMUNODEFICIENCY IN GOBIES IN DIFFERENT REGIONS OF NORTHERN PART OF CASPIAN SEA
Author(s) -
Tatyana Yurevna Borisova,
Petr Petrovich Geraskin
Publication year - 2020
Publication title -
vestnik astrahanskogo gosudarstvennogo tehničeskogo universiteta. seriâ: rybnoe hozâjstvo
Language(s) - English
Resource type - Journals
eISSN - 2309-978X
pISSN - 2073-5529
DOI - 10.24143/2073-5529-2020-4-138-146
Subject(s) - fish <actinopterygii> , fishery , biology , ecology , geography
The article focuses on studying the formation of secondary immunodeficiency in gobies in the northern and southern parts of the Russian sector of the Northern Caspian Sea. The study was based on a new approach to studying the immune system – the detection of a natural inhibitory factor in biological fluids. It has been shown that the level of secondary immunodeficiency is an integral indicator that expresses not only the state of the immune system, but also the physiological status of the studied fish and their adaptive capabilities. In the studied areas of the Northern Caspian Sea the worst results of secondary immunodeficiency were found in gobies caught in the waters of Small Zhemchuzhny Island and Bolshaya Zhemchuzhnaya Bank, the best results were registered off Kulalinskaya Bank. It has been stated that in the first decade of the 2000s the inhibition index in the water area of Maly Zhemchuzhny Island and Bolshaya Zhemchuzhnaya Bank was, on average, 1.2 times lower than in 2018. In addition, in the areas of Maly Zhemchuzhny Island and Kulalinskaya Bank fish without immunodeficiency were detected until 2002, the proportion of which decreased from year to year. It is assumed that the formation of immunodeficiency is associated with a long-term impact on bulls of flood waters of the Volga River, contaminated with toxic substances.