A screening of medicinal compounds for their effect on egg strings and nauplii of the salmon louse Lepeophtheirus salmonis (Krøyer).
Egg strings and nauplii of the salmon louse Lepeophtheirus salmonis were exposed to a variety of medicinal compounds at 50 mg L(-1) for 30 min in two experiment series. This medicine concentration was selected as a starting point for a screening series. Hatching of egg strings and development to copepodid larvae were monitored in one experiment, and the survival and development of nauplii were monitored in the other. Two compounds, emamectin benzoate and cypermethrin, inhibited hatching effectively. Several compounds affected nauplii, either directly or through inhibiting development to the infective stage. A total of 50 mg L(-1) of azamethiphos, cypermethrin, emamectin benzoate and propoxur was lethal to >70% of the larvae. Diflubenzuron, fenoxycarb, pymetrozine, pyriprole and tebufenozide diminished the ability of nauplii developing to copepodids.
['Aaen|S M|SM|', 'Hamre|L A|LA|', 'Horsberg|T E|TE|']
D000818:Animals D033342:Copepoda D004478:Ectoparasitic Infestations D005260:Female D005393:Fish Diseases D007306:Insecticides D007814:Larva D008297:Male D010063:Ovum D010575:Pesticides D018675:Toxicity Tests
screening medicines egg strings nauplii salmon lice