Fig. 6. Variations in the plasma cortisol concentrations in the blood plasma of the river puffer, Takifugu obscurus during 48 hrs of various clove oil dose and salinity in anaesthetic groups. Values are means±SE of triplicate experiments (n=50). a: 10 ppt; b: 20 ppt; c: 30 ppt. Actually n=96 for each experiment because the means and SE were calculated separately for each group. Different letters on error bars are significantly different among elapsed time in anaesthesia groups (p<0.05).
