[Differences in the reactivity of 2 mouse genotypes to zoo-social signals in the partition test]

The reaction was studied of male mice of CBA and C57BL/6J lines to zoosocial signals coming from another individual. "Partition" test was used, in which two males of one line were placed in a common cage divided into two sections by a transparent partition with holes; this partition divided the animals but allowed them to see and sniff each other. The number of approaches to partition, summary and average time of staying near it during one approach were recorded. Mice of both lines reacted to presence of unknown partner behind the partition by an increase of activity near the partition; in CBA mice all recorded parameters were greater than in C57BL/6J mice. A greater sensitivity is suggested of CBA animals to perception of pheromonal signals. "Partition" test may be used for estimation of mice reaction to zoosocial signals.