Skip to content

Research at St Andrews

Physiological effects of simultaneous, abrupt seawater entry and sea lice (Lepeophtheirus salmonis) infestation of wild, sea-run brown trout (Salmo trutta) smolts

Research output: Contribution to journalArticle

DOI

Author(s)

Alan Wells, Christal E Grierson, Monique Lea MacKenzie, Iain J Russon, Helena Reinardy, Claire Middlemiss, Pal A Bjorn, Bengt Finstad, Sjoerd E Wendelaar Bonga, Christopher David Todd, Neil Hazon

School/Research organisations

Abstract

For wild, sea-run brown trout (Salmo trutta) smolts, the physiological consequences of abrupt transfer to seawater and simultaneous challenge with copepodid larvae of the sea louse, Lepeophtheirus salmonis (Kroyer, 1837), were investigated in the laboratory. Analysis of osmoregulatory, metabolic, and stress markers allowed the derivation of a sublethal threshold burden of L. salmonis, above which the host suffers major physiological stress. Noticeable lice effects, consistent across all measured markers, were not observed until L. salmonis developed to the mobile preadult and adult stages. Preadult L. salmonis caused significant increases in plasma chloride, osmolality, glucose, lactate, and cortisol and a significant reduction in haematocrit. Piecewise linear statistical approaches allowed the determination of abrupt changes in these physiological markers, attributable to the intensity of L. salmonis infestation on individual fish, and identification of overall threshold lice burdens. Thirteen mobile lice·fish-1 (weight range 19-70 g) was a consistent breakpoint across several physiological measures. This information will provide a valuable, objectively derived tool to aid in the formulation of effective wild fisheries management policy concerning S. trutta conservation.

Close

Details

Original languageEnglish
Pages (from-to)2809-2821
Number of pages13
JournalCanadian Journal of Fisheries and Aquatic Sciences
Volume63
Issue number12
DOIs
Publication statusPublished - Dec 2006

    Research areas

  • ATLANTIC SALMON, SALAR L., TRANSPORT STRESS, WESTERN SCOTLAND, POST-SMOLTS, LOUSE, REGRESSION, INFECTION, GROWTH, SELECTION

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

View graph of relations

Related by author

  1. Physiological consequences of 'premature freshwater return' for wild sea-run brown trout (Salmo trutta) postsmolts infested with sea lice (Lepeophtheirus salmonis)

    Wells, A., Grierson, C., Marshall, L., MacKenzie, M. L., Russon, I., Reinhardy, H., Sivertsgård, R., Bjørn, P., Finstad, B., Bonga, S., Todd, C. D. & Hazon, N., Oct 2007, In : Canadian Journal of Fisheries and Aquatic Sciences. 64, 10, p. 1360-1369 10 p.

    Research output: Contribution to journalArticle

  2. Getting into hot water? Atlantic Salmon responses to climate change in freshwater and marine environments

    Todd, C. D., Friedland, K., MacLean, J., Hazon, N. & Jensen, A., 2011, Atlantic Salmon Ecology. Aas, O., Einum, S., Klemetsen, A. & Skurdal, J. (eds.). Chichester, UK: Wiley-Blackwell, p. 409-443

    Research output: Chapter in Book/Report/Conference proceedingChapter

  3. Precision and accuracy of Dahl-Lea back-calculated smolt lengths from adult scales of Atlantic salmon (Salmo salar L.)

    Hanson, N. N., Smith, G. W., Middlemas, S. J. & Todd, C. D., 29 Jan 2019, In : Journal of Fish Biology. 94, 1, p. 183-186

    Research output: Contribution to journalArticle

  4. Context-dependent reduction in somatic condition of wild Atlantic salmon infested with sea lice

    Susdorf, R., Salama, N., Todd, C. D., Hillman, R., Elsmere, P. & Lusseau, D., 15 Nov 2018, In : Marine Ecology Progress Series. 606, p. 91-104

    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: 326822