The impact of the hydrological regime and temperature of the spring period in floodplain-river system on the catches of fish with different reproductive ecology in the Middle Ob River (Western Siberia)
https://doi.org/10.36038/2307-3497-2025-201-131-139
EDN: JFSQRB
Abstract
The aim of the work is analysis of the influence of the hydrological regime of the floodplain-river system of the Middle Ob and the ambient temperature in the spring on the dynamics of catches of commercial fish species with different reproductive ecologies.
Methods used: the research methodology is based on data on catches of aquatic biological resources and on the construction and analysis of graphs of interannual variability of hydro-logical and temperature parameters for 1947-2020.
Novelty: for the first time in the Middle Ob region, an analysis of the combined impact of the hydro-logical regime and environmental temperature in the spring period on the state of commercial fish stocks has been conducted.
Results: for effective natural reproduction of native phytophilic fish species (ide and roach) of the Middle Ob, conditions of timely flooding of the floodplain and optimal temperature conditions in May, as well as higher and prolonged flooding of the floodplain in June are necessary. The spawning efficiency of bream is less dependent on hydro-logical indicators and more on temperature indicators in May.
Practical significance: the obtained results make it possible to increase the accuracy of long-term forecasting of stock status and develop a strategy to reduce the risk of overexploitation when adjusting the recommended catch of aquatic biological resources of the Middle Ob.
About the Authors
V. A. Shatalin
Novosibirsk branch of «VNIRO» («ZapSibNIRO»)
Russian Federation
Russian Federation
1, Pisareva St., Novosibirsk, 630091
E. A. Interesova
Novosibirsk branch of «VNIRO» («ZapSibNIRO»)
Russian Federation
Russian Federation
1, Pisareva St., Novosibirsk, 630091
M. V. Selezneva
Novosibirsk branch of «VNIRO» («ZapSibNIRO»)
Russian Federation
Russian Federation
1, Pisareva St., Novosibirsk, 630091
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Review
For citations:
Shatalin V.A., Interesova E.A., Selezneva M.V. The impact of the hydrological regime and temperature of the spring period in floodplain-river system on the catches of fish with different reproductive ecology in the Middle Ob River (Western Siberia). Trudy VNIRO. 2025;201:131-139. (In Russ.) https://doi.org/10.36038/2307-3497-2025-201-131-139. EDN: JFSQRB
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