An evaluation of the duration of efficacy of emamectin benzoate in the control of Caligus curtus Muller infestations in Atlantic cod, Gadus morhua L.

作者：Hamre L A; Lunestad B T; Hannisdal R; Samuelsen O B^*

来源：Journal of Fish Diseases, 2011, 34(6): 453-457.

DOI：10.1111/j.1365-2761.2011.01256.x

• Caligus curtus
• efficacy
• emamectin benzoate
• Gadus morhua

The duration of efficacy of emamectin benzoate in the control of Caligus curtus infestations in Atlantic cod, Gadus morhua L., was studied following an administration of 50 mu g kg-1 for seven consecutive days. No lice were found on medicated fish when challenged 1 week (challenge 1) or 5 weeks (challenge 2) following termination of medication, whereas the mean abundance of lice among the unmedicated fish was 17.9 and 19.3 lice per fish in challenge 1 and 2, respectively. Muscle concentrations of 19.5 +/- 8.2 ng g-1 and 3.4 +/- 0.9 ng g-1, respectively, and skin concentrations of 23.1 +/- 10.8 and 4.2 +/- 1.0 ng g-1, respectively, were found 27 and 55 days following the termination of medication. Tissue concentrations and the duration of efficacy indicate a dosing regime for emamectin in cod, similar to the regime used for Atlantic salmon, Salmo salar L.

• 出版日期2011-6