Features of the formation of fish parasitofauna in the Novosibirsk Reservoir

The article presents generalized data on the species composition and its changes in fish parasites of the Novosibirsk reservoir from the moment of its formation to the present day. This is a relatively small reservoir, compared to other man-made water, with different types of areas and high flow, which makes it possible to use its example to evaluate transformation processes in the species and quantitative composition of fish parasites during the transition from river to lake type reservoirs and the formation of a separate biocenosis in it. Like any reservoir, it went through the classical stages of the formation of biocenoses of artificial reservoirs, therefore, eutrophication processes played a significant role in the species diversity of fish parasites; after the establishment of a conditional biological equilibrium, the most important factor became the hydrological regime, which regulates the number of the majority of fish parasites at the level of the first intermediate hosts. Over the years of its existence, species diversity in the Novosibirsk Reservoir has significantly decreased and separate dominant groups of parasites have appeared.