Variation in sensitivity of sea lice [Lepeophtheirus salmonis (Krøyer)] to dichlorvos on Irish salmon farms in 1991-92
- 1 November 2000
- journal article
- research article
- Published by Hindawi Limited in Aquaculture Research
- Vol. 31 (11) , 849-854
- https://doi.org/10.1046/j.1365-2109.2000.00518.x
Abstract
Variation in sensitivity of Lepeophtheirus salmonis (Krøyer) to dichlorvos in static toxicity tests was recorded on salmon farms in Ireland. Five hour LC50s ranged from 60 to 202 μg l −1 at 15 °C for five farms in Autumn 1991 and 76–151 μg l−1 at 10 °C for four farms in Spring of 1992. Resistance ratios, calculated using the most sensitive sites as baseline, were low and ranged from 1.32 to 3.27 in 1991 and 1.28–1.98 in 1992. Repeat sampling on three farms in 1991 and 1992 also indicated short-term changes in sensitivity to dichlorvos within farms.Keywords
This publication has 6 references indexed in Scilit:
- Field trials on the efficacy of the organophosphorus compound azamethiphos for the control of sea lice (Copepoda: Caligidae) infestations of farmed Atlantic salmon (Salmo salar)Aquaculture, 1996
- Current practices in the chemotherapeutic control of sea lice infestations in aquaculture: a reviewJournal of Fish Diseases, 1993
- Predicting infestation parameters and impacts of caligid copepods in wild and cultured fish populationsInvertebrate Reproduction & Development, 1992
- Reduced sensitivity of the salmon louse, Lepeophtheirus salmonis, to the organophosphate dichlorvosJournal of Fish Diseases, 1992
- Pesticide Resistance in ArthropodsPublished by Springer Nature ,1990
- Aeration rate, pH and temperature effects on the degradation of trichlorfon to DDVP and the half-lives of trichlorfon and DDVP in seawaterAquaculture, 1987