To get an accurate assessment of the fish in this experiment, all fish were killed and assessed in the laboratory according
to the method described in Finstad et al. (2000). A method to assess sea lice on live specimens is currently being devised. The sea trout collected from both gill-net and trap were put into plastic bags, killed by a blow to the head and bagged individually The fish were later thawed and sea lice were examined using a magnifying glass. Detached sea lice were also collected from the plastic bag. All lice were sorted by stage of development