Differential infestation of juvenile Pacific salmon by parasitic sea lice in British Columbia, Canada

Fraser River Pacific salmon have declined in recent decades possibly from parasitism by sea lice (Caligus clemensi and Lepeophtheirus salmonis). We describe the abundance of both louse species infesting co-migrating juvenile pink (Oncorhynchus gorbuscha), chum (O. keta), and sockeye (O. nerka) salmon over five years in the Discovery Islands and Johnstone Strait, British Columbia. The generalist louse, C. clemensi, was 5-, 7-, and 39-times more abundant than the salmonid specialist, L. salmonis, on pink , chum, and sockeye salmon, respectively. Caligus clemensi abundance was higher on pinks (0.45, 95% CI: 0.38-0.55) and sockeye (0.39 95% CI 32 0.33-0.47) than chum. L. salmonis abundance was highest on pinks (0.09, 95% CI = 0.06-0.15). Caligus clemensi had higher abundances in Johnstone Strait than the Discovery Islands. These results suggest differences in host specialization and transmission dynamics between louse species. Because both lice infest farmed salmon, but only C. clemensi infests Pacific herring (Clupea pallasii), conservation science and management regarding lice and Fraser River salmon should further consider C. clemensi and transmission from farmed salmon and wild herring.

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Licence: Creative Commons Attribution 4.0

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Dates

Metadata Reference Date(s) September 28, 2021, 00:00 (UTC) (Publication)
September 28, 2021, 16:20 (UTC) (Revision)
Dataset Reference Date(s) September 04, 2020 (Publication)
Frequency of Update As Needed

Citation

Dataset extent

Map data © OpenStreetMap contributors

Additional Info

Field Value
Ocean Variables Other
Scope Dataset
Status On Going
Topic Category oceans
Maintenance Note Generated from https://cioos-siooc.github.io/metadata-entry-form
Point of Contact
  • Name: Cole Brookson
    Affiliation: University of Alberta
    Contact Info Email: brookson@ualberta.ca
    Role: Point of Contact
  • Name: Martin Krkosek
    Affiliation: University of Toronto
    Contact Info Email: martin.krkosek@utoronto.ca
    Role: Point of Contact
  • Name: Brett Johnson
    Affiliation: Hakai Institute
    Contact Info Email: brett.johnson@hakai.org
    Role: Custodian
  • Name: Sean Godwin
    Affiliation: Dalhousie University
    Contact Info Email: sean.godwin@gmail.com
    Role: Point of Contact
Responsible Party
  • Individual Name: Cole Brookson
    Organisation Name / Affiliation: University of Alberta
    Contact Info Email: brookson@ualberta.ca
    Role: Author
  • Individual Name: Martin Krkosek
    Organisation Name / Affiliation: University of Toronto
    Contact Info Email: martin.krkosek@utoronto.ca
    Role: Principal Investigator
  • Individual Name: Brian Hunt
    Organisation Name / Affiliation: University of British Columbia
    Contact Info Email: b.hunt@oceans.ubc.ca
    Role: Author
  • Individual Name: Brett Johnson
    Organisation Name / Affiliation: Hakai Institute
    Contact Info Email: brett.johnson@hakai.org
    Role: Author
  • Individual Name: Brett Johnson
    Organisation Name / Affiliation: Hakai Institute
    Contact Info Email: brett.johnson@hakai.org
    Role: Owner
  • Individual Name: Luke Rogers
    Organisation Name / Affiliation: Fisheries and Oceans Canada
    Role: Author
  • Individual Name: Sean Godwin
    Organisation Name / Affiliation: Dalhousie University
    Contact Info Email: sean.godwin@gmail.com
    Role: Principal Investigator
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North Bounding Latitude 50.66883255
South Bounding Latitude 49.80151064
East Bounding Longitude -124.30109865
West Bounding Longitude -126.87477074
Temporal Extent
Vertical Extent Min: 0.0
Max: 9.0
Default Locale English
Citation identifier
Code: 10.5281/zenodo.4005400
Version
Associated Datasets