Effects of OBX intruder mice on behaviors of the residents.

Behaviors of the B6 and B6-Chr15MSM (15) residents upon encountering an OBX ICR intruder. Average frequencies of occurrence (by 1 sec time-sampling method) for each behavioral item for trials 1 and 2 are shown. For the percentage of aggressive pairs, the result of trial 1 is indicated. An asterisk indicates a significant strain difference between B6 resident and 15 resident (p Effects of OBX intruder mice on behaviors of the residents.