Table 2 Resident–intruder agonistic interactions. Behavioral parameters are grouped in three categories: Quality of contact, aggressive behaviors, and other behavioral responses. Only the significant statistical effects are shown (p values; ANOVAs with repeated measures) to highlight the effects of intruder’s genetic background (within-subject factor: C3H versus balb/c) and resident’s genotype (between-subject factor: mdx versus WT). The direction of the genotype differences is indicated in brackets

Quality of contact

 Orofacial (n)

p < 0.001 (C3H > balb)

–

–

 Orofacial (duration, s)

p < 0.001 (C3H > balb)

–

–

 Orogenital (n)

–

–

–

 Orogenital (duration, s)

–

–

–

 Other (n)

–

–

–

 Other (duration, s)

–

–

–

Aggressive behaviors

 Pursuits (n)

p < 0.05 (C3H > balb)

–

–

 Pursuits (duration, s)

–

–

–

 Resident dominant acts (n)

p = 0.01 (C3H > balb)

–

–

 Resident dominant acts (duration, s)

p < 0.001 (C3H > balb)

–

–

 Intruder dominant acts (n)

–

–

P < 0.05

 Intruder dominant acts (duration, s)

–

–

p = 0.09, NS

Other behavioral responses

 Rearings (n)

–

p < 0.05 (mdx < WT)

–

 Rearings (duration, s)

–

P < 0.05 (mdx < WT)

–

 Freezing during interaction (n)

p < 0.001 (C3H > balb)

P < 0.05 (mdx > WT)

–

 Freezing during interaction (duration, s)

p < 0.001 (C3H > balb)

P < 0.05 (mdx > WT)

P < 0.05

 Freezing apart from interaction (n)

p < 0.05 (C3H > balb)

–

–

 Freezing apart from interaction (duration, s)

–

–

–