Fig. 4: Significant differences in individual and social behaviors between transgenic animals in the CSDS condition arise, when novel CD1 is introduced in the social interaction task.

A–F The majority of the social behavioral parameters were overall significantly decreased in the CSDS animals (stress effect: #=p < 0.05, ##=p < 0.01, ###=p < 0.001, ####=p < 0.0001, genotype effect: *=p < 0.05, **=p < 0.01). G–J The individual parameters marked a significant decrease in the CSDS group. With emerging genotype differences in looking around and huddling behaviors (p < 0.05) K Overall impact of stress was again seen for speed parameter (p < 0.05), with the CRHfkbp5−/− animals moving the least of all the depicted groups (p < 0.05). L An exploratory index confirmed the overall effect of stress and within the CSDS group also indicated a significant genotype difference, with the CSDS CRHfkbp5−/− animals demonstrating significantly the least set of active exploratory behaviors in the arena with a non-aggressive CD1 animal. M The social interaction score solidified the effect of stress, by depicting the overall decreased social contact of the CSDS animals with the novel CD1 animal (p < 0.05).