Sea lice infestations on farmed Atlantic salmon in ...
|Title||Sea lice infestations on farmed Atlantic salmon in
Scotland and the use of ectoparasitic treatments| |Author(s)||C.
Revie, G. Gettinby, J. Treasurer, A. Grant, S. Reid|
|Abstract||A recently compiled national database on sea lice
infestations on farmed Atlantic salmon, contains detailed
records for the period 1996 to 2000 from over 30 commercial
sites on the west coast of Scotland. The data indicate that the
two prevalent species of lice, Lepeophtheirus salmonis and
Caligus elongatus, have different trends in abundance and
distinctive seasonal patterns of infestation on farmed salmon.
For the economically important species L salmonis, its abundance
on fish varies with the time of the production cycle, the time
of year and the particular year. Weekly fluctuations in sea lice
counts indicate that treatment can be very effective in
controlling infestations but that the counts recover rapidly and
regular treatments are necessary to ensure control. A c