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Fra rapporten: Summary and status of deep lights and deep feed use in commercial settings: welfare, behaviour and infestation at three case study sites

Figure 1. Lice infestation over a 12-week period with forced swimming at 0-5, 4-9, 8-13, 12-17 or 16-21 m depth in snorkel cages. Markers indicate average available swim depth below the snorkel with a logarithmic trendline and R2 value of 0.99. Data from Oppedal et al 2017.