NATIONAL SURVEY OF THE SEA LICE (LEPEOPHTHEIRUS SALMONIS KRØYER AND CALIGUS ELONGATUS NORDMANN) ON FISH FARMS IN IRELAND – 2000.

Farmed fish can be divided into three distinct groups, rainbow trout and two year classes (or generations) of salmon. In terms of husbandry and lice management, salmon which are at sea for a year or longer in April (growers/one-sea winter) are treated separately from younger salmon (smolts) and rainbow trout. Those salmon tha