The relevance of larval biology on spatiotemporal patterns of pathogen connectivity among open-marine salmon farms

Danielle Cantrell, Ramón Filgueira, Crawford W. Revie, Erin Rees, Raphael Vanderstichel, Ming Guo, Michael G.G. Foreman, Di Wan, Jon Grant

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Abstract

Warming waters are changing marine pathogen dispersal patterns and infectivity worldwide. Coupled biological-physical modelling has been used in many systems to determine the connectivity of meta-populations via infectious disease particles. Here we model the connectivity of sea lice larvae (Lepeophtheirus salmonis) among salmon farms in the Broughton Archipelago, British Columbia, Canada, using a coupled biological-physical model. The physical model simulated pathogen dispersal, while the biological component influenced the survival and developmental rates of the sea lice. Model results predicted high temporal variability in connectivity strength among farms; an emergent effect from the interacting parts of the simulation (dispersion vs. survival/development). Drivers of temporal variability were disentangled using generalized additive modeling, which revealed the variability was most strongly impacted by the spring freshet, which can act as a natural aid for sea lice control in the Broughton Archipelago. Our results suggest that farm management strategies can benefit by taking into account short-term spikes in regional pathogen connectivity among farms. Additionally, future scenarios of a warming climate with reduced snowpack can make sea lice control more challenging.
Original languageEnglish
Number of pages46
JournalCanadian Journal of Fisheries and Aquatic Sciences
Early online date16 Aug 2019
DOIs
Publication statusE-pub ahead of print - 16 Aug 2019

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Caligidae
louse
salmon
connectivity
pathogen
louse control
farm
Biological Sciences
farms
physical models
pathogens
archipelago
warming
Lepeophtheirus salmonis
species dispersal
infectivity
farm management
snowpack
infectious disease
metapopulation

Keywords

  • larva
  • salmon farms
  • marine pathogens

Cite this

Cantrell, Danielle ; Filgueira, Ramón ; Revie, Crawford W. ; Rees, Erin ; Vanderstichel, Raphael ; Guo, Ming ; Foreman, Michael G.G. ; Wan, Di ; Grant, Jon. / The relevance of larval biology on spatiotemporal patterns of pathogen connectivity among open-marine salmon farms. In: Canadian Journal of Fisheries and Aquatic Sciences. 2019.
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The relevance of larval biology on spatiotemporal patterns of pathogen connectivity among open-marine salmon farms. / Cantrell, Danielle; Filgueira, Ramón; Revie, Crawford W.; Rees, Erin; Vanderstichel, Raphael; Guo, Ming; Foreman, Michael G.G.; Wan, Di; Grant, Jon.

In: Canadian Journal of Fisheries and Aquatic Sciences, 16.08.2019.

Research output: Contribution to journalArticle

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AU - Cantrell, Danielle

AU - Filgueira, Ramón

AU - Revie, Crawford W.

AU - Rees, Erin

AU - Vanderstichel, Raphael

AU - Guo, Ming

AU - Foreman, Michael G.G.

AU - Wan, Di

AU - Grant, Jon

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