Our measured physiological consequences of injecting concentrated, BC-strain PRV into juvenile sockeye and Atlantic salmon were incompatible with a previous suggestion of sub-lethal cardio-respiratory impacts. P eak PCR response at 4-6 weeks post-injection and a sustained PRV infection,
at or beyond that seen in wild and farmed salmon,
produced no mortality and body condition was maintained. Well-established respirometry techniques for individual fish compared
time-matched measurements of routine (RMR), maximum (MMR) and hypoxic respiratory performance with sham-injected salmon. While blood hemoglobin concentration and hematocrit decreased modestly at week 4 post-infection in sockeye and at weeks 1 and 9 in Atlantic
salmon , these modest changes were not sustained at week 9 in sockeye or at week 18 in Atlantic salmon . However, neither RMR , MMR nor hypoxia tolerance of PRV-infected salmon were significantly different from their time-matched controls, except MMR was significantly higher in infected Atlantic
salmon at week 10.