Does the freshwater mussel Anodonta anatina remove the fish pathogen Flavobacterium columnare from water?
Hajisafarali, M., Aaltonen, S., Pulkkinen, K., & Taskinen, J. (2022). Does the freshwater mussel Anodonta anatina remove the fish pathogen Flavobacterium columnare from water?. Hydrobiologia, 849(4), 1067-1081. https://doi.org/10.1007/s10750-021-04769-6
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HydrobiologiaDate
2022Copyright
© The Author(s) 2021
Global decline of freshwater mussels (Unionoida) is threatening biodiversity and the essential ecosystem services that mussels provide. As filter-feeding organisms, freshwater mussels remove phytoplankton and suspended particles from the water. By filtering bacteria, freshwater mussels also decrease pathogen loads in the water. The objective of this study was to evaluate whether the common freshwater bivalve Anodonta anatina (duck mussel) could remove the bacterial fish pathogen Flavobacterium columnare from the water. Mussels reduced bacteria in both of the two experiments performed, so that the bacterial concentration at the end of the 96-h monitoring in mussel treatments was only 0.3–0.5 times that of the controls. Surprisingly, mussels did not reduce algal cell concentration statistically significantly. Mussel behavior (shell openness, foot position, and movement) was not affected by the presence of bacteria or algae, except for biodeposition formation, which was greatest in algal-fed treatments, followed by bacterial-fed treatments and controls, respectively. The intestines of bacteria-incubated A. anatina harbored F. columnare, suggesting that mussels ingested the bacteria. Present results suggest that freshwater mussels may also have a potential to mitigate aquaculture pathogen problems, as well as play a role in water quality management.
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Open Access funding provided by University of Jyväskylä (JYU). The Maj and Tor Nessling Foundation (SA and MH via KP), the EU European Neighbourhood Instrument (ENI) Kolarctic Cross-Border Collaboration (CBC) Program (Project SALMUS/KO1017; JT), and the Biological and Environmental Science Doctoral School of the JYU (MH) provided financial support for the study.License
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