Supplementary material from "Environmental DNA from multiple pathogens is elevated near active Atlantic salmon farms"
Version 3 2020-10-06, 16:05
Version 2 2020-10-06, 16:00
Version 1 2020-09-29, 17:08
Posted on 2020-10-06 - 16:00
The spread of infection from reservoir host populations is a key mechanism for disease emergence and extinction risk and is a management concern for salmon aquaculture and fisheries. Using a quantitative environmental DNA methodology, we assessed pathogen environmental DNA in relation to salmon farms in coastal British Columbia, Canada, by testing for 39 species of salmon pathogens (viral, bacterial, and eukaryotic) in 134 marine environmental samples at 58 salmon farm sites (both active and inactive) over 3 years. Environmental DNA from 22 pathogen species was detected 496 times and species varied in their occurrence among years and sites, likely reflecting variation in environmental factors, other native host species, and strength of association with domesticated Atlantic salmon. Overall, we found that the probability of detecting pathogen environmental DNA (eDNA) was 2.72 (95% CI: 1.48, 5.02) times higher at active versus inactive salmon farm sites and 1.76 (95% CI: 1.28, 2.42) times higher per standard deviation increase in domesticated Atlantic salmon eDNA concentration at a site. If the distribution of pathogen eDNA accurately reflects the distribution of viable pathogens, our findings suggest that salmon farms serve as a potential reservoir for a number of infectious agents; thereby elevating the risk of exposure for wild salmon and other fish species that share the marine environment.
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Shea, Dylan; Bateman, Andrew; Li, Shaorong; Tabata, Amy; Schulze, Angela; Mordecai, Gideon; et al. (2020). Supplementary material from "Environmental DNA from multiple pathogens is elevated near active Atlantic salmon farms". The Royal Society. Collection. https://doi.org/10.6084/m9.figshare.c.5136594.v2
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AUTHORS (13)
DS
Dylan Shea
AB
Andrew Bateman
SL
Shaorong Li
AT
Amy Tabata
AS
Angela Schulze
GM
Gideon Mordecai
LO
Lindsey Ogston
JV
John P. Volpe
LN
L. Neil Frazer
BC
Brendan Connors
KM
Kristina M. Miller
SS
Steven Short
MK
Martin Krkošek