Fig. 3

Change in saliva cortisol concentrations for guinea pigs due to social confrontations. a Effect of dietary treatments (control, PUFA, SFA), combining both sexes. b Effect of sex, combining all dietary treatments. *p ≤ 0.05, **p ≤ 0.01, ***p ≤ 0.001 comparing both sampling points in time within the dietary treatments. Comparison of time courses: control-PUFA: n.s., control-SFA: p ≤ 0.001, PUFA-SFA: p ≤ 0.05; males-females: p = 0.051