Abstract
The study is dedicated to the assessment of fish fauna of the natural and artificial water bodies in Nakhchivan in 2018–2022 and the environmental factors that have impact over them. It was determined for this period that fish fauna is distributed in 10 water bodies. Out of those water bodies, Nakhchivan reservoir dominates both from the perspective of species and fish hunting. Along with the study of fish fauna in aquifers, the factors influencing their development were also assessed. Although the balance is disturbed as a natural factor, factors such as industrial waste, garbage and solid waste, sewage waste, detergents and artificial fertilizers, agrochemicals, oil and oil products, radioactivity and thermal pollution are the main factors of environmental pollution. Other factors: untimely and excessive hunting, fishing during reproductive migration, the introduction of new fish species into freshwater sources, anthropogenic factors such as hydropower also have a significant impact on fish development.
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