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Assessment of lice grazing of lumpfish in large-scale sea pens. Occurrence of the chalimus (A), pre-adult (B), adult female (C) L. salmonis and (D) Caligus elongatus per salmon (n=60 in each group at each sampling point) in large-scale sea cages with 0 (control), 4, 6 and 8% density of lumpfish recorded for each duplicate treatment during each of the sampling (bi-weekly) dates.
