Effect of infection on interspecific interactions among amphipods A shelter occupancy time and B number of aggression acts shown by D. haemobaphes (circles) and D. villosus (squares) (pooled infection status) in response to heterospecifics of various infection status: infected (red border), non-infected (blue border) or pooled (grey border). Results are back-transformed least squares means (±95% confidence intervals) predicted for significant effects by the General or Generalized Linear Model (analysis G in Table 1 and Suppl. material 1, Table S2). Treatments marked with the same lowercase letters did not differ significantly from one another. Non-significant effects are pooled.