Wild salmonids and sea louse infestations on the west coast of Scotland: Sources of infection and implications for the management of marine salmon farms

  • Butler J
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Abstract

The sea louse (Lepeophtheirus salmonis Kroyer) is a major health problem for both farmed and wild salmonids. This paper investigates louse epidemiology and management in the salmon-farming zone of western Scotland. Based on a review of the marine ecology of wild salmon (Salmo salar L) and sea trout (Salmo trutta L), and catch and farm production statistics, best estimates were made for numbers of wild and fat it hosts present in coastal waters in March-June 2000. Applying data for ovigerous female louse infections and fecundity, the sources and risks of larval transmission to wild salmon and sea trout were modelled. Farm salmon in the second spring of production were the primary host group (98% of fish), while numbers of wild salmonids (

Author-supplied keywords

  • Atlantic salmon
  • Epidemiology
  • Lepeophtheirus salmonis
  • Salmon farming
  • Sea trout
  • Wild fisheries

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Authors

  • James R.A. Butler

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