ABSTRACT
Infestation of the caligid parasitic copepods; Lepeophtheirus salmonis K. and Caligus elongatus N., here named as “salmon lice”, have been controlled on 530.000 atlantic salmon (Salmo salar L.) the first year in sea by adding 17.000 wrasse to the net pens. Smolts were transferred to six net pens during May 1992, at an ongrowingfarm at Sotra, (AS MOWI Skorpeosen), located outside Bergen in western Norway. Status of lice infestations have been mapped regularly. The final objective is further development of the biological delousing method for the whole marine farming period of salmon, and hereby avoid the use of chemical pesticides.
