Abstract
Because biological invasions may cause loss of biodiversity, accurate predictions are necessary for implementing effective restrictions aimed at specific high-risk taxa. The majority of freshwater macroinvertebrate invaders are molluscs and crustaceans. The pet trade has been considered one of the main pathways for new introductions of such species. Risk assessment is usually focused on traded ornamental species whereas, despite their potential importance, incidental “hitchhiking” molluscs are usually given only minimal consideration. We surveyed the Czech Republic, which is one of the leading markets for aquarium species in the European Union (EU), and found 41 freshwater mollusc species (25 ornamental gastropods, 6 ornamental clams, and 10 “hitchhiking” gastropods) representing 13 families. We extrapolated data from the Czech Republic and, using Climatch v. 1.0, matched the climate in each species’ native range to the entire territory of the EU. We also assessed the risk associated with each species by FI-ISK. “Hitchhiking” gastropods were found to be significantly more hazardous and with higher potential to become established within the EU than were ornamental gastropods and bivalves. Many “hitchhikers” may be easily overlooked due to their small size and cryptic coloration or shape. Thus, they easily can be accidentally imported in association with aquarium plants. Therefore, we recommend here to disinfect imported ornamental plants to eradicate these unwanted faunal assemblages.
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This study was supported by the Internal Grant Agency of Czech University of Life Sciences Prague: CIGA Project Nos. 20152007 and 20152004. The English was proofread by a native-speaking editor from English Editorial Services, s.r.o.
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Patoka, J., Kopecký, O., Vrabec, V. et al. Aquarium molluscs as a case study in risk assessment of incidental freshwater fauna. Biol Invasions 19, 2039–2046 (2017). https://doi.org/10.1007/s10530-017-1412-6
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DOI: https://doi.org/10.1007/s10530-017-1412-6