Skip to content

Research at St Andrews

Population genetic differentiation of sea lice (Lepeophtheirus salmonis) parasitic on Atlantic and Pacific salmonids: analyses of microsatellite DNA variation among wild and farmed hosts

Research output: Contribution to journalArticle

DOI

Abstract

The copepod Lepeophtheirus salmonis is ectoparasitic on Atlantic and Pacific wild salmonids. It is a major pest to Atlantic salmon (Salmo salar) aquaculture and may be implicated in recent declines of certain European wild salmonid stocks. Variation at six microsatellite loci was assessed among L. salmonis from wild and farmed salmonids in Scotland, wild sea-run brown trout (Salmo trutta) in Norway, and farmed Atlantic salmon in eastern Canada. An outgroup North Pacific sample was obtained from farmed Atlantic salmon in British Columbia. No significant differentiation was found between L. salmonis from the host species or among samples from throughout the North Atlantic. This is consistent with long-distance oceanic migration of wild hosts and larval interchange between farmed and wild host stocks being sufficient to prevent genetic divergence of L. salmonis throughout the North Atlantic. These results have important management implications for both wild stock conservation and aquaculture in that genetically, L. salmonis in the North Atlantic comprises a single population: there is no evidence of isolation of populations on farmed hosts from those on wild fish. Comparison between North Pacific and North Atlantic L. salmonis populations showed significant but low differentiation (F-ST = 0.06).

Close

Details

Original languageEnglish
Pages (from-to)1176-1190
Number of pages15
JournalCanadian Journal of Fisheries and Aquatic Sciences
Volume61
Issue number7
DOIs
Publication statusPublished - Jul 2004

    Research areas

  • MOSQUITO CULEX-PIPIENS, SALAR L., TRUTTA L., INSECTICIDE RESISTANCE, WEST-COAST, KROYER, LOUSE, TROUT, CALIGIDAE, COPEPODA

Discover related content
Find related publications, people, projects and more using interactive charts.

View graph of relations

Related by author

  1. Variation in sexual dimorphism and assortative mating do not predict genetic divergence in the sexually dimorphic Goodeid fish Girardinichthys multiradiatus

    Macias Garcia, C., Smith, G., Gonzalez Zuarth, C., Graves, J. A. & Ritchie, M. G., 2012, In : Current Zoology. 58, 3, p. 440-452 13 p.

    Research output: Contribution to journalArticle

  2. Thirteen polymorphic microsatellite DNA loci from whiptails of the genus Aspidoscelis (Teiidae: Squamata) and related cnemidophorine lizards.

    Crawford, NG., Zaldívar-Rae, J., Hagen, C., Schable, A., Rosenblum, ER., Graves, J. A., Reeder, TW., Ritchie, M. G. & Glenn, TC., Jan 2008, In : Molecular Ecology Resources. 8, 1, p. 219-223 5 p.

    Research output: Contribution to journalArticle

  3. Sex and differentiation: population genetic divergence and sexual dimorphism in Mexican goodeid fish

    Ritchie, M. G., Hamill, R. M., Graves, J. A., Magurran, A. E., Webb, S. A. & Garcia, C. M., Sep 2007, In : Journal of Evolutionary Biology. 20, 5, p. 2048-2055 8 p.

    Research output: Contribution to journalArticle

Related by journal

  1. Landscape, colonization and life history: their effects on genetic diversity in four sympatric species inhabiting a dendritic system

    Ruzzante, D. E., McCraken, G. R., Salisbury, S. J., Brewis, H., Keefe, D., Gaggiotti, O. E. & Perry, R., 10 Apr 2019, In : Canadian Journal of Fisheries and Aquatic Sciences.

    Research output: Contribution to journalArticle

  2. Effects of a scientific echo sounder on the behavior of short-finned pilot whales (Globicephala macrorhynchus)

    Quick, N., Scott-Hayward, L., Sadykova, D., Nowacek, D. & Read, A., May 2017, In : Canadian Journal of Fisheries and Aquatic Sciences. 74, 5, p. 716-726 11 p.

    Research output: Contribution to journalArticle

  3. A simple method of dating marine growth circuli on scales of wild one sea-winter and two sea-winter Atlantic salmon (Salmo salar)

    Todd, C. D., Whyte, B., MacLean, J., Revie, C., Lonergan, M. & Hanson, N. N., 2014, In : Canadian Journal of Fisheries and Aquatic Sciences. 71, 5, p. 645-655 11 p.

    Research output: Contribution to journalArticle

  4. Striking the right balance in right whale conservation

    Schick, R. S., Halpin, P. N., Read, A. J., Slay, C. K., Kraus, S. D., Mate, B. R., Baumgartner, M. F., Roberts, J. J., Best, B. D., Good, C. P., Loarie, S. R. & Clark, J. S., Sep 2009, In : Canadian Journal of Fisheries and Aquatic Sciences. 66, 9, p. 1399-1403 5 p.

    Research output: Contribution to journalArticle

ID: 274232