Relationship between the endangered freshwater pearl mussel Margaritifera margaritifera, its salmonid host and co-infectants
Published inJYU dissertations
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 stage (up to 11 months) and excessive host specificity. This thesis focuses on this relationship by experimentally studying the effect of FPM infection on the growth and resistance of salmonid fish and how the infection influences vulnerability of the host to other parasites and diseases, as well as how exposure of the host to other parasites affects vulnerability to FPM. Infection with FPM results in (i) reduced growth of the host, brown trout, during the parasitic period. Glochidia infecting fish gills cause a respiratory burden which may explain the negative growth-effect. In addition, (ii) infection induced dose-dependent acquired immunity in repeated exposures. Instead, FPM infection leads to (iii) increased vulnerability of brown trout to eye fluke Diplostomum pseudospathaceum. It maybe the respiratory burden of FPM infection that increases ventilation and exposes the fish to these gill-penetrating eye fluke. FPM infection also causes (iv) increased resistance of the host to Flavobacterium columnare (a pathogen that enters fish through the gills) — possibly due to enhanced nonspecific immunity or altered structure of the fish’s gills. However, (v) pre-infection of trout with Anodonta anatina glochidia did not affect susceptibility to FPM, indicating that co-existing with A. anatina, is not a threat to FPM. Nevertheless, (vi) pre-infection with eye fluke cercariae within a short period (20 h) increased susceptibility of the host to FPM. Possibly, the tissue damage caused by recently penetrated eye fluke cercariae enhances attachment of FPM glochidia. These results shed light on complex, previously unstudied relationships between salmonid, FPM and other parasites/diseases and provide important new information that can be potentially utilized in conservation of this endangered species ...
- Artikkeli I: Chowdhury, M., Salonen, J., Marjomäki, T., & Taskinen, J. (2018). Interaction between the endangered freshwater pearl mussel Margaritifera margaritifera, the duck mussel Anodonta anatina and the fish host (Salmo) : acquired and cross-immunity. Hydrobiologia, 810 (1), 273-281. DOI: 10.1007/s10750-017-3114-6
- Artikkeli II: Gopko, Mikhail; Chowdhury, Motiur; Taskinen, Jouni (2018). Interactions between two parasites of brown trout (Salmo trutta) : Consequences of preinfection. Ecology and Evolution, 8 (20), 9986-9997. DOI: 10.1002/ece3.4406
- Artikkeli III: Chowdhury, M. Motiur R.; Marjomäki, Timo J.; Taskinen, Jouni (2019). Effect of glochidia infection on growth of fish : freshwater pearl mussel Margaritifera margaritifera and brown trout Salmo trutta. Hydrobiologia, First Online. DOI: 10.1007/s10750-019-03994-4
- Artikkeli IV: Chowdhury M.M.R., Roy A., Auvinen K., Pulkkinen K., Suonia H. & Taskinen J. 2018. Glochidia of the endangered freshwater pearl mussel, Margaritifera margaritifera, lower virulence of a fish pathogen. Manuscript.
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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. ...
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 ...
Effect of freshwater pearl mussel (Margaritifera margaritifera) infection on virulence of flavobacterium columnare in brown trout (Salmo trutta) Roy, Amitav (2019)Flavobacterium columnare on bakteeri, joka aiheuttaa kaloissa ns. lämpimän veden tautia (kolumnaris-tauti), mikä puolestaan aiheuttaa kuolleisuutta kalaisännissään. Erityisesti Pohjois-Euroopan alueella kesäaikana veden ...
Immunization of trout (Salmo trutta) against freshwater pearl mussel (Margaritifera margaritifera) by duck mussel (Anodonta anatina) glochidia Chowdhury, Motiur (2013)Freshwater pearl mussel Margaritifera margaritifera is endangered throughout its range of distribution in Europe. In some rivers M. margaritifera may co-occur with the duck mussel Anodonta anatina. Brown trout Salmo trutta ...
Glochidial infection by the endangered Margaritifera margaritifera (Mollusca) increased survival of salmonid host (Pisces) during experimental Flavobacterium disease outbreak Chowdhury, M. Motiur, R.; Roy, Amitav; Auvinen, Kalle; Pulkkinen, Katja; Suonia, Hanna; Taskinen, Jouni (Springer, 2021)Co-infections are common in host-parasite interactions, but studies about their impact on the virulence of parasites/diseases are still scarce. The present study compared mortality induced by a fatal bacterial pathogen, ...