Figure 4

Seasonal variation example. Physicochemical parameters [primary y axis: temperature (T in °C), pH of water, oxygen concentration (mg/L); secondary y axis: conductibility (μ Siemens)] measured in a selected fish farm (Ticino, Switzerland) during 2009. Detection of the pathogen in the tank water samples started on 9 June 2009 (*), the arrows indicate a flavobacteriosis outbreak in brown trout fario.