Host behaviour according to infection status and food treatment. Scores of refuge use for (a) control individuals; (b) individuals infected by parasites from the Vouge population; and (c) individuals infected by parasites from the Vair population. Grey plots represent groups who received the deprived food treatment and white plots stand for the standard food treatment. Scores are given for each of the three rounds: one day (C + 1), 10 days (C + 10) and 20 days (C + 20) after detection of cystacanth stages. Sample sizes are given above each plot. Thick lines represent the medians, the boxes represent the upper and lower quartiles and dotted lines represent the upper and lower deciles.