A1 Journal article (refereed)
Parasites in sympatric populations of native and invasive freshwater bivalves (2021)

Taskinen, J., Urbańska, M., Ercoli, F., Andrzejewski, W., Ożgo, M., Deng, B., Choo, J. M., & Riccardi, N. (2021). Parasites in sympatric populations of native and invasive freshwater bivalves. Hydrobiologia, 848(12-13), 3167-3178. https://doi.org/10.1007/s10750-020-04284-0

JYU authors or editors

Publication details

All authors or editorsTaskinen, Jouni; Urbańska, Maria; Ercoli, Fabio; Andrzejewski, Wojciech; Ożgo, Małgorzata; Deng, Binglin; Choo, Jocelyn M.; Riccardi, Nicoletta

Journal or seriesHydrobiologia



Publication year2021


Issue number12-13

Pages range3167-3178


Publication countryNetherlands

Publication languageEnglish


Publication open accessOpenly available

Publication channel open accessPartially open access channel

Publication is parallel published (JYX)https://jyx.jyu.fi/handle/123456789/69013


An increasing threat to local, native freshwater mussels (Unionida)—an ecologically important but globally alarmingly declining group—is the invasion by exotic bivalves. The Enemy Release Hypothesis predicts that introduced species should benefit from enemy-mediated competition because they are less likely to be harmed by natural enemies, such as parasites, than their native competitors. We investigated within-site differences in parasitism between sympatric native (tot. five spp.) and invasive (tot. three spp.) bivalves in eight northern European waterbodies, which harboured totally 15 parasite taxa. In paired comparisons using within-site averages, the mean number of parasite species in the native bivalves was 2.3 times higher, and the sum of parasite prevalences 2.4 times higher, than in the invasive bivalves. This may lead to enemy-mediated competitive release of invaders and contribute to the success of invasive freshwater bivalves, in general. However, while the invasive clam Corbicula fluminea was completely free from parasites, parasite parameters of the other invader, Sinanodonta woodiana, were relatively high, indicating that the role of parasites can be invader-specific and urges further research. Understanding the factors affecting success of freshwater bivalve invasions, such as parasitism, can aid invasion control and conservation of local, native (endangered) bivalves.

Keywordsintroduced speciesbivalviaparasitismparasitesfresh water

Free keywordsenemy release; exotic species; freshwater mussels; introduced alien species; non-indigenous species; parasite benefit

Contributing organizations

Ministry reportingYes

Reporting Year2021

JUFO rating1

Last updated on 2024-22-04 at 19:30