The role of salmonid fishes in conservation of the endangered freshwater pearl mussel (Margaritifera margaritifera)
Julkaistu sarjassa
Jyväskylä studies in biological and environmental scienceTekijät
Päivämäärä
2016Oppiaine
Akvaattiset tieteetThe 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. margaritifera and its
salmonid host required for reproduction of this species. First, by exposing fish
experimentally to glochidium larvae of M. margaritifera, different M. margaritifera
populations were shown to demonstrate strong differences in their ability to
parasitize different salmonid species. Atlantic salmon was clearly a better host for
mussels in large river channels, whereas in small headwater tributaries brown
trout was the best, or the only suitable, host. These findings provide a previously
unrecognised explanation for the collapse and the lack of recruitment especially of
the salmon-specific M. margaritifera populations; a high proportion of large
salmon rivers were dammed for hydropower production in the 1960s, which
prevented the migration of salmon and thus left M. margaritifera without the
appropriate host in these rivers. Furthermore, an invasive salmonid, brook trout,
was widely introduced to small tributaries above the dams in the past, but in this
study was shown to be an unsuitable host for M. margaritifera. Thus, and due to
the tendency of brook trout to replace native brown trout, the spread of brook
trout is an additional threat to M. margaritifera. An indication of local adaptation of
M. margaritifera, i.e. higher infectivity in sympatric salmonid host strain than in
allopatric populations of the same species, was also detected. Finally, a new, non-
destructive approach to search for M. margaritifera populations, involving
electrofishing and quick visual examination of the gills of captured salmonids,
revealed the occurrence of 3 previously unknown populations. The results of this
thesis highlight the importance of taking into account the roles of salmonid fish in
future efforts to search, protect and restore freshwater pearl mussel populations.
...
Julkaisija
University of JyväskyläISBN
978-951-39-6602-7ISSN Hae Julkaisufoorumista
1456-9701Julkaisuun sisältyy osajulkaisuja
- Article I: Salonen J.K., Luhta P.-L., Moilanen E., Oulasvirta P., Turunen J. & Taskinen J. 2016. Atlantic salmon (Salmo salar) and brown trout (Salmo trutta) differ in their suitability as a host for the endangered freshwater pearl mussel (Margaritifera margaritifera) in northern Fennoscandian rivers. Submitted manuscript.
- Article II: Taskinen J. & Salonen J.K. 2016. Origin matters: freshwater pearl mussels show adaptation to sympatric salmonid host strains. Manuscript.
- Article III:Salonen J.K., Marjomäki T.J. & Taskinen J. 2016. An alien fish threatens an endangered parasitic bivalve: the relationship between brook trout (Salvelinus fontinalis) and freshwater pearl mussel (Margaritifera margaritifera) in northern Europe. Aquatic Conservation: Marine and Freshwater Ecosystems DOI: 10.1002/aqc.2614
- Article IV: Salonen J.K. & Taskinen J. 2016. Electrofishing as a new method to search for unknown populations of the endangered freshwater pearl mussel Margaritifera margaritifera. Aquatic Conservation: Marine and Freshwater Ecosystems . In press.
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The endangered freshwater pearl mussel Margaritifera margaritifera shows adaptation to a local salmonid host in Finland
Taskinen, Jouni; Salonen, Jouni K. (Wiley-Blackwell, 2022)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 ... -
Relationship between the endangered freshwater pearl mussel Margaritifera margaritifera, its salmonid host and co-infectants
Chowdhury, M. Motiur R. (Jyväskylän yliopisto, 2018) -
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. ... -
Growth and longevity of the endangered freshwater pearl mussel (Margaritifera margaritifera) : Implications for conservation and management
Nykänen, Sabrina; Taskinen, Jouni; Hajisafarali, Mahsa; Kuparinen, Anna (Wiley, 2024)Key life-history data, such as growth and age, are necessary to effectively manage and conserve threatened freshwater mussel species. Traditionally growth and age studies require large yet destructive sample sizes covering ...
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