The lethality of the anti-sea lice formulation AlphaMax® (deltamethrin) to adult American lobster (Homarus americanus) during chronic or pulse dose exposures / by M.C. Lyons … [et al.].: Fs97-6/3217E-PDF

"Sea lice, the common name for copepodid ecto-parasites of Atlantic salmon are a problem for fish farms around the world. Severe infestations of sea lice often result in costs to fish farmers either in loss of product or in the cost of combating the infestations. A number of pesticides have been used to combat sea lice infestations in Canada since sea lice first became a problem in 1994 when two species, Lepeophtheirus salmonis and Caligus elongatus infested salmon in southwest New Brunswick (SWNB). The nature of the salmon aquaculture industry in SWNB is such that many farms are in close proximity to each other and to areas of traditional lobster fisheries. In this study we exposed adult American lobster continuously for 10 days to the formulation AlphaMax®. We investigated the effect of water temperature in combination with pulse doses of AlphaMax® over 6 days on adult American lobster. These exposures were designed to simulate conditions at an aquaculture site where over the course of a day, 4 cages of salmon in close proximity to each other would be treated with pesticide, consecutively, and that this would be repeated daily for 6 days”--Introd., p. [1], 2-3.

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