Article Text

PDF
Novel cypermethrin formulation for the control of sea lice on salmon (Salmo salar)
  1. J. L. Hart, BSc1,
  2. J. R. M. Thacker, BSc, MSc, PhD, PgCert, FRES2,
  3. J. C. Braidwood, BVSc, MRCVS1,
  4. N. R. Fraser, BSc, MSc1 and
  5. J. E. Matthews, BSc, PhD2
  1. 1 Grampian Pharmaceuticals Ltd, Research Division, Talkin, Brampton, Cumbria CA8 ILE
  2. 2 Department of Biological Sciences, University of Paisley, Paisley PAI 2BE

Abstract

A novel formulation of cypermethrin was applied as a bath treatment to Atlantic salmon infested with sea lice on a commercial fish farm on the Isle of Skye, Scotland. Twenty 15 m x 15 m cages were treated with cypermethrin at a concentration of 5 μg/litre sea water. The numbers of sea lice of all stages were recorded on five fish per cage before the treatment and one, seven and 16 days after treatment. Statistically significant reductions in the numbers of chalimus III and IV pre-adults and adults were recorded over the whole period; the average percentage reductions at one and 16 days after treatment were 59 per cent and 90 per cent (chalimus III and IV), 98 per cent and 95 per cent (pre-adults), and 99 per cent (adults), respectively.

    Statistics from Altmetric.com

      Request permissions

      If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.