Fig. 6. (A) Ventilation rates (beats min^-1) and (B) oxygen uptake rates (mg O₂ kg^-1 h^-1) of 10 Cancer gracilis monitored for a 3 h period in 100% seawater; food was administered and cardiac parameters followed for a further 3 h in seawater before low salinity conditions were initiated for 6 h. Seawater conditions were then restored for an additional 6 h. Values represent means ± s.e.m.