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New sites of the invasive signal crayfish, Pacifastacus leniusculus (Dana, 1852), from the Lutynia and Prosna rivers in Poland Cover

New sites of the invasive signal crayfish, Pacifastacus leniusculus (Dana, 1852), from the Lutynia and Prosna rivers in Poland

Open Access
|Jan 2026

Abstract

This article presents new observations of the invasive signal crayfish, Pacifastacus leniusculus, in Poland. The species was detected for the first time in the Lutynia and Prosna rivers in southwest Poland. In total 59 and 50 individuals were captured. The population examined probably came from illegal releases, while the presence of juvenile specimens may suggest that the population is capable of reproduction. This species could continue to spread and expand its range to include additional aquatic ecosystems. Therefore, it is recommended to monitor the environment regularly and take appropriate remedial actions against this population.

DOI: https://doi.org/10.2478/aopf-2025-0015 | Journal eISSN: 2545-059X | Journal ISSN: 2545-0255
Language: English
Page range: 166 - 172
Submitted on: Dec 11, 2024
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Accepted on: Nov 4, 2025
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Published on: Jan 18, 2026
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year

© 2026 Paweł Wróblewski, Rafał Maciaszek, Wiesław Świderek, published by Stanisław Sakowicz Inland Fisheries Institute
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.