The fish part of community of the vychegda river in the areas of treated wastewater influence of the pulp industry
R. R. Rafikov
Institute of Biology of Komi Science Centre of the UB of the RAS, Syktyvkar, Russia
Keywords: European northeast of Russia, PPM, waste water, fish population, species diversity, fluctuating asymmetry
Abstract
The paper is presented the results of a study of the species diversity and developmental stability of individuals of common fish species from the Vychegda River in the area of treated wastewater discharge of one of the largest pulp and paper mill in the European northeast of Russia. It was shown that for the period from 2018 to 2020, perch, roach, and bleak predominate in the catches of a set of nets with a mesh size of 10 to 60 mm in the littoral zone of the monitoring sites. These species are widespread representatives of the ichthyofauna in the basin of the studied river. The catches included non-native species such as white-eye bream, asp and pike-perch. They recent appearance of which became possible due to the construction of canals connecting the Northern Dvina River basin with other river systems. Indices of species diversity (the number of species, their relative abundance and the Shannon index) in monitoring sites from the region of the studed of pulp and paper production is similar. The integral index of individual development assessing, based on the fluctuating asymmetry indicator, indicates the absence of a negative effect on the formation of bilateral morphological structures in early ontogenesis in fish that lived as in the impact as in the conditionally background sits. It was recommended to conduct an additional study to identify physiological disorders in the body of fish or the accumulation of heavy metals or other pollutants in their tissues and organs to clarify the obtained results.
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