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Long-Term Monitoring of Fish Abundance Dynamics in the Middle Stretch of the Mesha River (Tatarstan) Cover

Long-Term Monitoring of Fish Abundance Dynamics in the Middle Stretch of the Mesha River (Tatarstan)

Open Access
|Mar 2025

Abstract

The study area is located in the middle reaches of the Mesha River on the territory of the Republic of Tatarstan and is characterized by strong temporal variability in environmental factors and fish populations. The impact of environmental factors on fish species and communities was analyzed with regression and ordination methods. The dominant species were bleak, dace, chub, and roach, which together accounted for 60.7% of the total fish species. Over 15 years of research, there have been significant decreasing trends in overall density, species richness and density of individual fish species. The main factors determining the size of both the fish population and individual species were fishing effort and temperature during different months. The index of long-term similarity of fish populations was only 7.5%.

DOI: https://doi.org/10.2478/trser-2024-0011 | Journal eISSN: 2344-3219 | Journal ISSN: 1841-7051
Language: English
Page range: 75 - 90
Published on: Mar 12, 2025
Published by: Lucian Blaga University of Sibiu
In partnership with: Paradigm Publishing Services
Publication frequency: 3 issues per year
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© 2025 Arthur Askeyev, Igor Askeyev, Sergey Monakhov, Nur Yanybaev, Oleg Askeyev, published by Lucian Blaga University of Sibiu
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.