D. Jackson et al., VARIATIONS IN PARASITIC CALIGID INFESTATIONS ON FARMED SALMONIDS AND IMPLICATIONS FOR THEIR MANAGEMENT, ICES journal of marine science, 54(6), 1997, pp. 1104-1112
In order to evaluate the performance of various sea lice management st
rategies, data sets from a number of salmon farm sites on the west coa
st of Ireland were examined. These data sets were collected as part of
the ongoing National Sea Lice Monitoring Programme in Ireland. Tempor
al and geographic variations in infestations of Lepeophtheirus salmoni
s and Caligus elongatus are described from two species of farmed salmo
nids, Salmo salar L. and Oncorhynchus mykiss Walbaum. Patterns of lice
transmission, both within and between fish populations, are discussed
and environmental and biotic influences considered. Clear differences
in infestation parameters, which persist over a number of seasons, ar
e identified between sites. Where infestation parameters are observed
to change over successive seasons, these are linked to changing husban
dry practices. (C) 1997 International Council for the Exploration of t
he Sea.