Abstract
On the example of zebrafish Danio rerio, a new hydrodynamic installation “circular tank with limnozone” was tested to determine one of the indicators of the motivational component of rheoreaction in fish: the ratio of rheoreaction types. In contrast to the fish previously used in this setup, here the fish are given the opportunity to exhibit a rheoreaction of four, but not three types. A comparative analysis of rheoreaction assessment methods using three installations: “fishway”, “circular tank” and “circular tank with limnozone” was carried out. It is shown that the provision of the opportunity to exhibit an optional type of rheoreaction not only quantitatively, but also qualitatively changes the ratio of zebrafish rheoreaction types. The scope of the considered methods is determined.
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Notes
Critical water current velocity—the minimal velocity causing drift of fish by current (Pavlov, 1979).
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ACKNOWLEDGMENTS
We are grateful to A. O. Kasumyan (Moscow State University) for valuable comments of the manuscript text.
Funding
The sampling of the materials was supported by the Program of Presidium of Russian Academy of Sciences no. 41 “Biodiversity of natural systems and biological resources of Russia”; the processing and analysis were conducted with the support from Russian Science Foundation, project no. 19-14-00015.
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Pavlov, D.S., Parshina, V.Y., Kostin, V.V. et al. Comparison of Experimental Methods for Evaluating the Motivational Component of Fish Rheoreaction (Proportions of Rheoreaction Types). J. Ichthyol. 60, 643–652 (2020). https://doi.org/10.1134/S0032945220040153
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DOI: https://doi.org/10.1134/S0032945220040153