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- W3187839161 abstract "Abstract Internal seiches are common in stratified lakes, with significant effects on stratification patterns, hydrodynamics and vertical nutrient transport. In particular, seiche can change the vertical distribution of the thermocline and the cold hypolimnetic and warm epilimnetic water masses by several meters on a timescale of a few hours. The results are rapid and strong changes in temperature profiles and oxygen availability that can have profound effects on vagrant and sessile organisms. Internal seiche dynamics could therefore affect fish communities directly through physiological stress and elevated mortality, and indirectly through prey distribution. The aim of this study was to analyze the effects of internal seiche dynamics on lacustrine fish behaviour, and to characterize fish reaction patterns, with the main focus on vertical movement of fish in the vicinity of a shifting thermocline, and avoidance of cold hypolimnetic water. The analysis was based on acoustic telemetry data from Lake Milada, a post-mining lake in the Czech Republic, with a total of 55 tracked individuals of four species: northern pike ( Esox luciu s), wels catfish ( Silurus glani s), tench ( Tinca tinc a) and rudd ( Scardinius erythropthalmu s). The effects of seiche dynamics on the four species studied were weak but significant during the day, but only on rudd during the night. Upward seiche produced stronger reactions in fish than downward seiche, and the effects were manifested only during the strongest seiche events. Thermocline shifting during seiche events may induce a transient reduction in habitat for seiche-reacting species, thus potentially affecting predation and other inter- and intra-specific interactions, and probably affecting fish community dynamics. Graphical abstract" @default.
- W3187839161 created "2021-08-16" @default.
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- W3187839161 date "2021-08-05" @default.
- W3187839161 modified "2023-10-16" @default.
- W3187839161 title "Influence of internal seiche dynamics on vertical movement of fish" @default.
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- W3187839161 doi "https://doi.org/10.1101/2021.08.03.454964" @default.
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