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Experimental Study of Rheoreaction of the European River Lamprey Lampetra fluviatilis (L.) Downstream Migrating Smolts under Various Illumination

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Abstract

Rheoreaction of the downstream migrating smolts of the European river lamprey was studied in the experimental conditions at illuminations of day and night intensity. It was found that at the daytime the smolts are mostly dormant and if move downstream then in active-passive form (with the head against the stream, and their speed going beyond the velocity). This data is well within the findings on the night downstream migration of the smolts during the 24h period in natural conditions. Thus, the downstream migration of the smolts has an active form.

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REFERENCES

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ACKNOWLEDGMENTS

The authors are grateful to V.V. Kostin for advice in the course of work and to A.O. Kasumyan for valuable criticisms on MS.

Funding

The study was supported by the Russian Science Foundation, project no. 19-14-00015.

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Correspondence to A. O. Zvezdin.

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Conflict of interests. The authors declare that they have no conflict of interests.

Statement on the welfare of interests. All applicable international, national, and/or institutional guidelines for the care and use of animals were followed.

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Translated by N. Smirnov

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Zvezdin, A.O., Pavlov, D.S., Tsimbalov, I.A. et al. Experimental Study of Rheoreaction of the European River Lamprey Lampetra fluviatilis (L.) Downstream Migrating Smolts under Various Illumination. Dokl Biol Sci 487, 112–114 (2019). https://doi.org/10.1134/S0012496619040045

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  • DOI: https://doi.org/10.1134/S0012496619040045

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