The endangered freshwater pearl mussel Margaritifera margaritifera shows adaptation to a local salmonid host in Finland
Taskinen, J., & Salonen, J. K. (2022). The endangered freshwater pearl mussel Margaritifera margaritifera shows adaptation to a local salmonid host in Finland. Freshwater Biology, 67(5), 801-811. https://doi.org/10.1111/fwb.13882
Published inFreshwater Biology
© 2022 The Authors. Freshwater Biology published by John Wiley & Sons Ltd
1. The freshwater pearl mussel Margaritifera margaritifera (FPM) is an endangered unionid which has a glochidium larva that attaches to the gills of Atlantic salmon Salmo salar or brown trout S. trutta, although some FPM populations have been shown to exclusively attach to only one of these species. The origin of host fish populations may be crucial for conservation actions for this mussel species, but the relative suitability of local (sympatric) and non- local (allopatric) salmonid populations as the hosts for FPM has been studied only rarely. We hypothesised that FPM glochidia would show adaptation to local salmonid strains and, there-fore, that they would be more successful (abundant, larger) attached to sympat-ric than to allopatric fish. 2. Here, we investigated the infection success (abundance and growth of encysted larvae in fish) of FPM in local versus non- local fish by caging different strains of brown trout and Atlantic salmon in rivers where FPM populations are present. 3. Higher abundances of glochidia in local fish were observed in three brown trout streams, and larger glochidia were found in sympatric hosts in one brown trout stream and in one salmon river. Furthermore, non- local allopatric fish were not better hosts than local fish in any of the FPM populations tested, neither in brown trout or salmon rivers and neither in abundance nor size of larvae. Therefore, the results supported the hypothesis that glochidia show local adap-tation by being more successful when attached to local fish strains. 4. Thus, the local, sympatric fish strain should be preferred in FPM conservation programmes that involve captive breeding of juvenile mussels and introduction of host fish, but the regional assessment of local host dependency of FPM also would be important outside the current study area. 5. The results also indicate the importance of restoration of original salmonid pop-ulations in FPM rivers to enable the natural, effective reproduction cycle of FPM in their original, sympatric hosts, and thus to promote the recovery of endan-gered FPM populations. ...
Publication in research information system
MetadataShow full item record
Related funder(s)Raija ja Ossi Tuuliainen Foundation
Additional information about fundingEU Interreg IV A Nord Programme; the Doctoral Programme in Biological and Environmental Science of the University of Jyväskylä; Raija ja Ossi Tuuliaisen Säätiö; Emil Aaltosen Säätiö; Maj ja Tor Nesslingin Säätiö; Academy of Finland
Showing items with similar title or keywords.
The role of salmonid fishes in conservation of the endangered freshwater pearl mussel (Margaritifera margaritifera) Salonen, Jouni (University of Jyväskylä, 2016)The abundance of freshwater pearl mussels (Margaritifera margaritifera) has declined widely during the past century, and new conservation initiatives are needed. This thesis focused on the relationship between M. ...
Relationship between the endangered freshwater pearl mussel Margaritifera margaritifera, its salmonid host and co-infectants Chowdhury, M. Motiur R. (Jyväskylän yliopisto, 2018)The relationship between the freshwater pearl mussel (hereafter FPM), Margaritifera margaritifera, and its salmonid host — pivotal for the conservation of this endangered bivalve — is characterized by a long parasitic ...
Atlantic salmon (Salmo salar) and brown trout (Salmo trutta) differ in their suitability as hosts for the endangered freshwater pearl mussel (Margaritifera margaritifera) in northern Fennoscandian rivers Salonen, Jouni; Luhta, Pirkko-Liisa; Moilanen, Eero; Oulasvirta, Panu; Turunen, Jarno; Taskinen, Jouni (Blackwell Scientific, 2017)1. European populations of the freshwater pearl mussel (FPM, Margaritifera margaritifera) have widely collapsed, and despite many types of conservation actions the number of successful restoration trials has remained ...
Interaction between the endangered freshwater pearl mussel Margaritifera margaritifera, the duck mussel Anodonta anatina and the fish host (Salmo) : acquired and cross-immunity Chowdhury, Motiur; Salonen, Jouni; Marjomäki, Timo; Taskinen, Jouni (Kluwer Academic Publishers; Springer Netherlands, 2018)The common duck mussel Anodonta anatina can live in sympatry with—and use the same host, brown trout (Salmo trutta)—as the endangered freshwater pearl mussel Margaritifera margaritifera. Since the glochidia release of A. ...
Effect of glochidia infection on growth of fish : freshwater pearl mussel Margaritifera margaritifera and brown trout Salmo trutta Chowdhury, M. Motiur R.; Marjomäki, Timo J.; Taskinen, Jouni (Springer, 2021)Effect of freshwater mussels’ (Unionoida) glochidia on the growth of fish host has remained poorly studied. We compared the specific growth rate of the juvenile, PIT-marked brown trout (Salmo trutta) between uninfected ...