Wydanie 330(40)4 2016

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https://oa.zut.edu.pl/handle/20.500.12539/707

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    Piaractus brachypomus (characiformes, serrasalmidae) – an incidental alien species in polish and world waters?
    (Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2016) Więcaszek, Beata; Keszka, Sławomir; Dziaman, Robert; Górecka, Klaudia; Dąbrowski, Jarosław; Department of Hydrobiology, Ichthyology and Biotechnology of Breeding, West Pomeranian University of Technology, Szczecin; Department of Aquaculture, West Pomeranian University of Technology, Szczecin; Department of Aquaculture, West Pomeranian University of Technology, Szczecin; Department of Hydrobiology, Ichthyology and Biotechnology of Breeding, West Pomeranian University of Technology, Szczecin; Department of Hydrobiology, Ichthyology and Biotechnology of Breeding, West Pomeranian University of Technology, Szczecin
    This paper presents the biological characteristics of five individuals of Piaractus brachypomus (15.3–37.0 cm TL) caught in north-western Poland (Szczecin Lagoon, lake Dąbie and Pomorzany Power Plant cooling water canal in Szczecin), in 2002–2010, by recreational anglers and commercial fishermen. Additionally, well documented records of P. brachypomus (17.0–49.0 cm TL) in different waters (lakes, ponds, dam reservoirs, rivers and lagoons) collected from 2001 to September 2015 by recreational fishers, are presented. All these individuals were released into the wild by aquarists. Nonindigenous occurrences in Europe and in the world outside the native range (the Amazon and Orinoco basins) of the species are also discussed, including a record of alive pirapitinga in the Baltic Sea. An evaluation of invasion risk in the environment in Poland, based on the thermal tolerance of the specimens studied, is included. The laboratory experiment showed that the lower limit of thermal tolerance was 11.2oC, therefore the potential for over winter survival in Polish waters is extremely low, even in the warm-water canals of power plants. However, the progressive process of global warming may enlarge the distribution of nonindigenous occurrences of P. brachypomus, with more effective overwintering and breeding, with the possibility of novel pathogen transfer to native aquatic biota.