Intensive aquaculture selects for increased virulence and interference competition in bacteria
Sundberg, L.-R., Ketola, T., Laanto, E., Kinnula, H., Bamford, J., Penttinen, R., & Mappes, J. (2016). Intensive aquaculture selects for increased virulence and interference competition in bacteria. Proceedings of the Royal Society B: Biological Sciences, 283(1826), Article 20153069. https://doi.org/10.1098/rspb.2015.3069
DisciplineEkologia ja evoluutiobiologiaSolu- ja molekyylibiologiaBiologisten vuorovaikutusten huippututkimusyksikköEcology and Evolutionary BiologyCell and Molecular BiologyCentre of Excellence in Biological Interactions Research
© 2016 The Author(s) This is a final draft version of an article whose final and definitive form has been published by The Royal Society. Published in this repository with the kind permission of the publisher.
Although increased disease severity driven by intensive farming practices is problematic in food production, the role of evolutionary change in disease is not well understood in these environments. Experiments on parasite evolution are traditionally conducted using laboratory models, often unrelated to economically important systems. We compared how the virulence, growth and competitive ability of a globally important fish pathogen, Flavobacterium columnare, change under intensive aquaculture. We characterized bacterial isolates from disease outbreaks at fish farms during 2003–2010, and compared F. columnare populations in inlet water and outlet water of a fish farm during the 2010 outbreak. Our data suggest that the farming environment may select for bacterial strains that have high virulence at both long and short time scales, and it seems that these strains have also evolved increased ability for interference competition. Our results are consistent with the suggestion that selection pressures at fish farms can cause rapid changes in pathogen populations, which are likely to have long-lasting evolutionary effects on pathogen virulence. A better understanding of these evolutionary effects will be vital in prevention and control of disease outbreaks to secure food production. ...
PublisherThe Royal Society Publishing
Dataset(s) related to the publicationhttp://dx.doi.org/10.5061/dryad.nk76k
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Related funder(s)Academy of Finland
Funding program(s)Academy Research Fellow, AoF
Additional information about fundingThis work was supported by the Finnish Centre of Excellence Program of the Academy of Finland, CoE in Biological Interactions 2012–2017 (no. 252411, J.M. and J.K.H.B.), by Academy of Finland grants nos.272995 (L.-R.S.) and 278751 (T.K.) and by Maj and Tor Nessling Foundation (J.K.H.B.).
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