Semiochemical strategies for sea louse control: host location cues

Anna Ingvarsdottir, M. A. Birkett, I. Duce, William Mordue, J. A. Pickett, L. J. Wadhams, Anne Jennifer Mordue

Research output: Contribution to journalArticle

51 Citations (Scopus)

Abstract

The development of behavioural bioassays and electrophysiological recording techniques has enabled the role of semiochemicals to be investigated for the first time in Lepeophtheirus salmonis (Kroyer). Adult male sea lice L salmonis were activated by, and attracted to, salmon-conditioned water (SCW) and SCW extract. Non-host fish odours, turbot-conditioned water (TCW) and turbot-conditioned water extract (TCW extract), elicited activation but no attraction in the lice. Solid-phase extraction techniques were developed to extract low molecular weight components of fish odours, and biological activity was shown to be confined to these. Electrophysiological activity from aesthetascs in the first antennae was found and neural responses to odours were recorded from the antennal nerves. Preliminary experiments on individual chemicals (isophorone, 1-octen-3-ol) linked to salmon revealed behavioural activation and electrophysiological responses in adult male L salmonis. Isophorone was shown to be significantly attractive to sea lice when placed in a slow-release system in a perfused tank of seawater in a choice situation. Proof of concept has been established for successfully extracting odour cues from seawater, analysing their biological activity and applying these to slow-release technologies for field trapping of lice. Future work involving linked GC-MS techniques using behaviour, electrophysiological responses, and organolepsis will establish further host location cues specific to Atlantic salmon. (C) 2002 Society of Chemical Industry.

Original languageEnglish
Pages (from-to)537-545
Number of pages8
JournalPest Management Science
Volume58
Issue number6
DOIs
Publication statusPublished - May 2002

Keywords

  • Lepeophtheirus salmonis
  • sea louse
  • host location
  • behaviour
  • electrophysiology
  • semiochemicals
  • salmon
  • Salmo salar
  • LEPEOPHTHEIRUS-PECTORALIS MULLER
  • CHEMICAL COMMUNICATION
  • CULICOIDES IMPUNCTATUS
  • TEMORA-LONGICORNIS
  • OLFACTORY SENSILLA
  • SALMO-SALAR
  • CALIGIDAE
  • COPEPODS
  • BEHAVIOR
  • MATE

Cite this

Ingvarsdottir, A., Birkett, M. A., Duce, I., Mordue, W., Pickett, J. A., Wadhams, L. J., & Mordue, A. J. (2002). Semiochemical strategies for sea louse control: host location cues. Pest Management Science, 58(6), 537-545. https://doi.org/10.1002/ps.510