Predicted prevalence of four disease-causing agents (Ichthyobodo necator (diamonds), Chilodonella spp. (squares), Ichthyophthirius multifiliis (triangles) and
Flavobacterium columnare (circles)) in relation to temperature. Values are predictions of linear mixed models (Table 2). Analyses were run separately for two age groups of
salmon (Salmo salar; fingerlings (0+) and yearlings (1+)) on farm A (A and B) and farm B (C and D), both in northern Finland. Note different y-axis scale in B.