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Jackson, D,Kane, F,O'Donohoe, P,Mc Dermott, T,Kelly, S,Drumm, A,Newell, J
2013
March
Journal Of Fish Diseases
Sea lice levels on wild Atlantic salmon, Salmo salar L., returning to the coast of Ireland
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Atlantic salmon chalimus infestation inshore Lepeophtheirus salmonis sea lice LEPEOPHTHEIRUS-SALMONIS
36
293
298
The sea lice population structure, prevalence and intensity of Lepeophtheirus salmonis have been studied over a period extending from 2004 to 2011. Infestation data were collected from the interceptor drift net fishery from 2004 until it was closed in 2006. From 2010, data were collected from the inshore draft net fishery. In all, 34 samples from the drift and draft net fisheries have been analysed to date. Prevalence of infestation with L. salmonis regularly approached 100% in samples of hosts recovered from the offshore drift net fishery. Abundance was variable both within and between years with a maximum mean abundance of 25.8 lice per fish recorded in 2004. The population structure of L. salmonis on hosts recovered in the inshore and estuarine draft net fisheries was different from that observed in the more offshore drift net samples. There is clear evidence of recent infestation with L. salmonis in the draft net samples.
DOI 10.1111/jfd.12059
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